updated documentation #85

add option to apply metadata in existing file.

Apologies for the late merge, you sent this pull request right as school was beginning to pick up in earnest and I forgot about it in that rush. Thanks for the great work!

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*.cr]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true

.gitignore

@@ -1,13 +1,15 @@
-# General stuff to ignore.
-*.pyc
-/dist/
-/*.egg-info/
-/build/
+/docs/
+/lib/
+/bin/
+/logs/
+/.shards/
+/Music/
+*.dwarf
 
-# For easy updating of stuff.
-update_pypi_and_github.py
-
-# Currently in progress
-/flexx-app/
-/.idea/
-*test.py
+*.mp3
+*.webm*
+.ripper.log
+ffmpeg
+ffprobe
+youtube-dl
+*.temp

.travis.yml

@@ -0,0 +1,6 @@
+language: crystal
+
+# Uncomment the following if you'd like Travis to run specs and check code formatting
+# script:
+#   - crystal spec
+#   - crystal tool format --check

LICENSE

@@ -1,674 +1,21 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-
-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
-  0. Definitions.
-
-  "This License" refers to version 3 of the GNU General Public License.
-
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-
-  To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
-
-  A "covered work" means either the unmodified Program or a work based
-on the Program.
-
-  To "propagate" a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-
-  To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
-
-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-
-  1. Source Code.
-
-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
-
-  A "Standard Interface" means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-
-  The "System Libraries" of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-"Major Component", in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-
-  The "Corresponding Source" for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-
-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
-
-  The Corresponding Source for a work in source code form is that
-same work.
-
-  2. Basic Permissions.
-
-  All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-
-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
-
-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-
-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-
-  No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-
-  When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
-
-  4. Conveying Verbatim Copies.
-
-  You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-
-  You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-
-  5. Conveying Modified Source Versions.
-
-  You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
-
-    a) The work must carry prominent notices stating that you modified
-    it, and giving a relevant date.
-
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-
-    c) You must license the entire work, as a whole, under this
-    License to anyone who comes into possession of a copy.  This
-    License will therefore apply, along with any applicable section 7
-    additional terms, to the whole of the work, and all its parts,
-    regardless of how they are packaged.  This License gives no
-    permission to license the work in any other way, but it does not
-    invalidate such permission if you have separately received it.
-
-    d) If the work has interactive user interfaces, each must display
-    Appropriate Legal Notices; however, if the Program has interactive
-    interfaces that do not display Appropriate Legal Notices, your
-    work need not make them do so.
-
-  A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-"aggregate" if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-
-  6. Conveying Non-Source Forms.
-
-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
-
-    a) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by the
-    Corresponding Source fixed on a durable physical medium
-    customarily used for software interchange.
-
-    b) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by a
-    written offer, valid for at least three years and valid for as
-    long as you offer spare parts or customer support for that product
-    model, to give anyone who possesses the object code either (1) a
-    copy of the Corresponding Source for all the software in the
-    product that is covered by this License, on a durable physical
-    medium customarily used for software interchange, for a price no
-    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-
-    c) Convey individual copies of the object code with a copy of the
-    written offer to provide the Corresponding Source.  This
-    alternative is allowed only occasionally and noncommercially, and
-    only if you received the object code with such an offer, in accord
-    with subsection 6b.
-
-    d) Convey the object code by offering access from a designated
-    place (gratis or for a charge), and offer equivalent access to the
-    Corresponding Source in the same way through the same place at no
-    further charge.  You need not require recipients to copy the
-    Corresponding Source along with the object code.  If the place to
-    copy the object code is a network server, the Corresponding Source
-    may be on a different server (operated by you or a third party)
-    that supports equivalent copying facilities, provided you maintain
-    clear directions next to the object code saying where to find the
-    Corresponding Source.  Regardless of what server hosts the
-    Corresponding Source, you remain obligated to ensure that it is
-    available for as long as needed to satisfy these requirements.
-
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
-
-  A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-
-  A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
-
-  "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
-
-  If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-
-  The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
-
-  Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-
-  7. Additional Terms.
-
-  "Additional permissions" are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-
-  When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-
-  Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
-
-    a) Disclaiming warranty or limiting liability differently from the
-    terms of sections 15 and 16 of this License; or
-
-    b) Requiring preservation of specified reasonable legal notices or
-    author attributions in that material or in the Appropriate Legal
-    Notices displayed by works containing it; or
-
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
-    reasonable ways as different from the original version; or
-
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-
-    e) Declining to grant rights under trademark law for use of some
-    trade names, trademarks, or service marks; or
-
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
-
-  All other non-permissive additional terms are considered "further
-restrictions" within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-
-  If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-
-  Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
-
-  8. Termination.
-
-  You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-
-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
-
-  Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-  Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-
-  9. Acceptance Not Required for Having Copies.
-
-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-
-  10. Automatic Licensing of Downstream Recipients.
-
-  Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-
-  An "entity transaction" is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-
-  You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-
-  11. Patents.
-
-  A "contributor" is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's "contributor version".
-
-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, "control" includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-
-  Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-
-  In the following three paragraphs, a "patent license" is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To "grant" such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-  12. No Surrender of Others' Freedom.
-
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Use with the GNU Affero General Public License.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    {one line to give the program's name and a brief idea of what it does.}
-    Copyright (C) {year}  {name of author}
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    {project}  Copyright (C) {year}  {fullname}
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+The MIT License (MIT)
+
+Copyright (c) 2020 Cooper Hammond
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -1,91 +1,237 @@
-# Ironic Redistribution System
-[![License: GNU](https://img.shields.io/badge/License-GNU-yellow.svg)](http://www.gnu.org/licenses/gpl.html)
-[![PyPI](https://img.shields.io/badge/PyPi-Python_3.x-blue.svg)](https://pypi.python.org/pypi/irs)
+# irs: The Ironic Repositioning System
 
-<em>Spotify playlists are now downloadable! Just use the `-u` flag and your username!</em>
+[![made-with-crystal](https://img.shields.io/badge/Made%20with-Crystal-1f425f.svg?style=flat-square)](https://crystal-lang.org/)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow?style=flat-square)](https://github.com/cooperhammond/irs/blob/master/LICENSE)
+[![Say Thanks](https://img.shields.io/badge/say-thanks-ff69b4.svg?style=flat-square)](https://saythanks.io/to/kepoorh%40gmail.com)
 
-An ironically named program to download audio from youtube and then parse metadata for the downloaded file.
-___
-### Usage and Examples
-To download Spotify playlists, you need to supply client_ids. To do this, you'll want to create an application [here](https://developer.spotify.com/my-applications/#!/applications/create). Once you've done that, you'll want to copy your 'client id' and your 'client secret' into the config file and their corresponding lines. To find the config file run this command: `irs -C`. If that's all working, enter the name of the playlist you would like to download like this:
-```bash
-irs -p "Brain Food"
-```
-If you are looking for one of *your* playlists, you'll want to use the `-u` flag and put your username in:
-```bash
-irs -u "prakkillian"
-```
-If you download a specific song, you'll want to use the `-s` and `-a` flag.
-```bash
-irs -a "David Bowie" -s "Ziggy Stardust"
-```
-To download an entire album, you'll want to use the `-A` flag. If the album you want can't be found, run it with the `-a` flag for some more specification.
-```bash
-irs -A "Sadnecessary" # -a "Milky Chance"
-```
-[![asciicast](https://asciinema.org/a/5aijmkdux6nk8ckhke0jmzlyq.png)](https://asciinema.org/a/5aijmkdux6nk8ckhke0jmzlyq?speed=3&autoplay=true)
+> A music scraper that understands your metadata needs.
 
-[![asciicast](https://asciinema.org/a/8kb9882j4cbtd4hwbsbb7h0ia.png)](https://asciinema.org/a/8kb9882j4cbtd4hwbsbb7h0ia?speed=3)
+`irs` is a command-line application that downloads audio and metadata in order
+to package an mp3 with both. Extensible, the user can download individual 
+songs, entire albums, or playlists from Spotify.
 
-Full usage:
-```
-usage:
-    irs (-h | -v)
-    irs [-l]
-    irs -p PLAYLIST [-c COMMAND] [-l]
-    irs -A ALBUM [-c COMMAND] [-l]
-    irs -a ARTIST -s SONG [-c COMMAND] [-l]
+<p align="center">
+    <img src="https://i.imgur.com/7QTM6rD.png" height="400" title="#1F816D" />
+</p>
+<p align="center"
 
-Options:
-  -h, --help            show this help message and exit
-  -v, --version         Display the version and exit.
-  -A ALBUM, --album ALBUM
-                        Search spotify for an album.
-  -p PLAYLIST, --playlist PLAYLIST
-                        Search spotify for a playlist.
-  -u USER, --user USER  Download a user playlist.
-  -c COMMAND, --command COMMAND
-                        Run a background command with each song's location.
-                        Example: `-c "rhythmbox %(loc)s"`
-  -a ARTIST, --artist ARTIST
-                        Specify the artist name. Only needed for -s/--song
-  -s SONG, --song SONG  Specify song name of the artist. Must be used with
-                        -a/--artist
-  -l, --choose-link     If supplied, will bring up a console choice for what
-                        link you want to download based off a list of titles.
-```
-Make a note that capitalization and spelling matters a lot in this program.
+[![forthebadge](https://forthebadge.com/images/badges/compatibility-betamax.svg)](https://forthebadge.com)
+[![forthebadge](https://forthebadge.com/images/badges/ages-18.svg)](https://forthebadge.com)
+[![forthebadge](https://forthebadge.com/images/badges/built-by-codebabes.svg)](https://forthebadge.com)
+</p>
 
-___
-### Installation
-Please note that it currently is only usable in `Python 3.x`. Almost all dependencies are automatically installed by pip, but `youtube_dl` still needs `ffmpeg` to convert video to audio, so for Windows, you can install [`Scoop`](http://scoop.sh/) and then just do:
-```
-scoop install ffmpeg
-```
-For OSX, you can use [`Brew`](http://brew.sh/) to install `ffmpeg`:
-```
-brew install ffmpeg
-```
-And then for Ubuntu:
-```
-sudo apt-get install ffmpeg
-```
-Most other linux distros have `ffmpeg` or `libav-tools` in their package manager repos, so you can install one or the other for other distros.
+---
 
-Finally, install it!
-```
-pip install irs
-```
+## Table of Contents
 
-### Why the name?
-As an acronym, it spells IRS. I think this is breathtakingly hilarious because the Internal Revenue Service (also the IRS) takes away, while my program gives. I'm so funny. You can tell that I'll get laid in college.
+- [Usage](#usage)
+    - [Demo](#demo)
+- [Installation](#installation)
+    - [Pre-built](#pre-built)
+    - [From source](#from-source)
+    - [Set up](#setup)
+- [Config](#config)
+- [How it works](#how-it-works)
+- [Contributing](#contributing)
 
 
-### Wishlist
- - [x] Finds album based off of song name and artist
- - [x] Full album downloading
- - [x] Album art metadata correctly displayed
- - [x] Playlist downloading
- - [x] Spotify playlist downloading
- - [ ] GUI/Console interactive version - <em>In progress</em>
- - [ ] 100% success rate for automatic song choosing
+## Usage
+
+```
+~ $ irs -h
+
+Usage: irs [--help] [--version] [--install]
+           [-s <song> -a <artist>]
+           [-A <album> -a <artist>]
+           [-p <playlist> -a <username>]
+
+Arguments:
+    -h, --help                  Show this help message and exit
+    -v, --version               Show the program version and exit
+    -i, --install               Download binaries to config location
+    -c, --config                Show config file location
+    -a, --artist <artist>       Specify artist name for downloading
+    -s, --song <song>           Specify song name to download
+    -A, --album <album>         Specify the album name to download
+    -p, --playlist <playlist>   Specify the playlist name to download
+    -u, --url <url>             Specify the youtube url to download from (for single songs only)
+    -g, --give-url              Specify the youtube url sources while downloading (for albums or playlists only only)
+
+Examples:
+    $ irs --song "Bohemian Rhapsody" --artist "Queen"
+    # => downloads the song "Bohemian Rhapsody" by "Queen"
+    $ irs --album "Demon Days" --artist "Gorillaz"
+    # => downloads the album "Demon Days" by "Gorillaz"
+    $ irs --playlist "a different drummer" --artist "prakkillian"
+    # => downloads the playlist "a different drummer" by the user prakkillian
+```
+
+### Demo
+
+[![asciicast](https://asciinema.org/a/332793.svg)](https://asciinema.org/a/332793)
+
+## Installation
+
+### Pre-built 
+
+Just download the latest release for your platform 
+[here](https://github.com/cooperhammond/irs/releases).
+
+Note that the binaries right now have only been tested on WSL. They *should* run on most linux distros, and OS X, but if they don't please make an issue above.
+
+### From Source
+
+If you're one of those cool people who compiles from source
+
+1. Install crystal-lang 
+    ([`https://crystal-lang.org/install/`](https://crystal-lang.org/install/))
+1. Clone it (`git clone https://github.com/cooperhammond/irs`)
+1. CD it (`cd irs`)
+1. Build it (`shards build`)
+
+### Setup
+
+1. Create a `.yaml` config file somewhere on your system (usually `~/.irs/`)
+1. Copy the following into it
+    ```yaml
+    binary_directory: ~/.irs/bin
+    music_directory: ~/Music
+    filename_pattern: "{track_number} - {title}"
+    directory_pattern: "{artist}/{album}"
+    client_key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+    client_secret: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+    single_folder_playlist:
+        enabled: true
+        retain_playlist_order: true
+        unify_into_album: false
+    ```
+1. Set the environment variable `IRS_CONFIG_LOCATION` pointing to that file
+1. Go to [`https://developer.spotify.com/dashboard/`](https://developer.spotify.com/dashboard/)
+1. Log in or create an account
+1. Click `CREATE A CLIENT ID`
+1. Enter all necessary info, true or false, continue
+1. Find your client key and client secret
+1. Copy each respectively into the X's in your config file
+1. Run `irs --install` and answer the prompts!
+
+You should be good to go! Run the file from your command line to get more help on
+usage or keep reading!
+
+# Config
+
+You may have noticed that there's a config file with more than a few options. 
+Here's what they do:
+```yaml
+binary_directory: ~/.irs/bin
+music_directory: ~/Music
+search_terms: "lyrics"
+filename_pattern: "{track_number} - {title}"
+directory_pattern: "{artist}/{album}"
+client_key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+client_secret: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+single_folder_playlist:
+    enabled: true
+    retain_playlist_order: true
+    unify_into_album: false
+```
+ - `binary_directory`: a path specifying where the downloaded binaries should
+    be placed
+ - `music_directory`: a path specifying where downloaded mp3s should be placed.
+ - `search_terms`: additional search terms to plug into youtube, which can be
+    potentially useful for not grabbing erroneous audio.
+ - `filename_pattern`: a pattern for the output filename of the mp3
+ - `directory_pattern`: a pattern for the folder structure your mp3s are saved in
+ - `client_key`: a client key from your spotify API application
+ - `client_secret`: a client secret key from your spotify API application
+ - `single_folder_playlist/enabled`: if set to true, all mp3s from a downloaded
+    playlist will be placed in the same folder.
+ - `single_folder_playlist/retain_playlist_order`: if set to true, the track 
+    numbers of the mp3s of the playlist will be overwritten to correspond to
+    their place in the playlist
+ - `single_folder_playlist/unify_into_album`: if set to true, will overwrite
+    the album name and album image of the mp3 with the title of your playlist
+    and the image for your playlist respectively
+
+
+In a pattern following keywords will be replaced:
+
+| Keyword | Replacement | Example |
+| :----: | :----: | :----: |
+| `{artist}` | Artist Name | Queen |
+| `{title}` | Track Title | Bohemian Rhapsody |
+| `{album}` | Album Name | Stone Cold Classics |
+| `{track_number}` | Track Number | 9 |
+| `{total_tracks}` | Total Tracks in Album | 14 |
+| `{disc_number}` | Disc Number | 1 |
+| `{day}` | Release Day | 01 |
+| `{month}` | Release Month | 01 |
+| `{year}` | Release Year | 2006 |
+| `{id}` | Spotify ID | 6l8GvAyoUZwWDgF1e4822w |
+
+Beware OS-restrictions when naming your mp3s.
+
+Pattern Examples:
+```yaml
+music_directory: ~/Music
+filename_pattern: "{track_number} - {title}"
+directory_pattern: "{artist}/{album}"
+```
+Outputs: `~/Music/Queen/Stone Cold Classics/9 - Bohemian Rhapsody.mp3`
+<br><br>
+```yaml
+music_directory: ~/Music
+filename_pattern: "{artist} - {title}"
+directory_pattern: ""
+```
+Outputs: `~/Music/Queen - Bohemian Rhapsody.mp3`
+<br><br>
+```yaml
+music_directory: ~/Music
+filename_pattern: "{track_number} of {total_tracks} - {title}"
+directory_pattern: "{year}/{artist}/{album}"
+```
+Outputs: `~/Music/2006/Queen/Stone Cold Classics/9 of 14 - Bohemian Rhapsody.mp3`
+<br><br>
+```yaml
+music_directory: ~/Music
+filename_pattern: "{track_number}. {title}"
+directory_pattern: "irs/{artist} - {album}"
+```
+Outputs: `~/Music/irs/Queen - Stone Cold Classics/9. Bohemian Rhapsody.mp3`
+<br>
+
+
+## How it works
+
+**At it's core** `irs` downloads individual songs. It does this by interfacing
+with the Spotify API, grabbing metadata, and then searching Youtube for a video
+containing the song's audio. It will download the video using 
+[`youtube-dl`](https://github.com/ytdl-org/youtube-dl), extract the audio using
+[`ffmpeg`](https://ffmpeg.org/), and then pack the audio and metadata together
+into an MP3.
+
+From the core, it has been extended to download the index of albums and 
+playlists through the spotify API, and then iteratively use the method above
+for downloading each song.
+
+It used to be in python, but
+1. I wasn't a fan of python's limited ability to distribute standalone binaries
+1. It was a charlie foxtrot of code that I made when I was little and I wanted
+    to refine it
+1. `crystal-lang` made some promises and I was interested in seeing how well it
+    did (verdict: if you're building high-level tools you want to run quickly 
+    and distribute, it's perfect)
+
+
+## Contributing
+
+Any and all contributions are welcome. If you think of a cool feature, send a 
+PR or shoot me an [email](mailto:kepoorh@gmail.com). If you think something 
+could be implemented better, _please_ shoot me an email. If you like what I'm
+doing here, _pretty please_ shoot me an email.
+
+1. Fork it (<https://github.com/your-github-user/irs/fork>)
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

irs/__main__.py

@@ -1,115 +0,0 @@
-#!/usr/bin python
-HELP = \
-"""
-usage:
-    irs (-h | -v | -C)
-    irs [-l]
-    irs -p PLAYLIST [-c COMMAND] [-l]
-    irs -A ALBUM [-c COMMAND] [-l]
-    irs -a ARTIST -s SONG [-c COMMAND] [-l]
-
-Options:
-  -h, --help            show this help message and exit
-
-  -v, --version         Display the version and exit.
-
-  -C, --config          Return location of configuration file.
-
-  -A ALBUM, --album ALBUM
-                        Search spotify for an album.
-
-  -p PLAYLIST, --playlist PLAYLIST
-                        Search spotify for a playlist.
-
-  -u USER, --user USER  Download a user playlist.
-
-  -c COMMAND, --command COMMAND
-                        Run a background command with each song's location.
-                        Example: `-c "rhythmbox %(loc)s"`
-
-  -a ARTIST, --artist ARTIST
-                        Specify the artist name. Only needed for -s/--song
-
-  -s SONG, --song SONG  Specify song name of the artist. Must be used with
-                        -a/--artist
-
-  -l, --choose-link     If supplied, will bring up a console choice for what
-                        link you want to download based off a list of titles.
-"""
-
-# For exiting
-from sys import exit
-
-# Parsing args
-import argparse
-
-# Import the manager
-from .manager import Manager
-from .utils import *
-from .config import CONFIG
-
-def main():
-    parser = argparse.ArgumentParser(add_help=False)
-    parser.add_argument('-h', '--help', action='store_true', dest='help')
-    parser.add_argument('-v', '--version', dest="version", action='store_true', help="Display the version and exit.")
-    parser.add_argument('-C', '--config', dest="config", action='store_true', help="Return config file location.")
-
-    parser.add_argument('-c', '--command', dest="command", help="Run a background command with each song's location.")
-    parser.add_argument('-a', '--artist', dest="artist", help="Specify the artist name.")
-
-    parser.add_argument('-u', '--user', dest="user", help="Specify user to download playlists from.")
-
-    parser.add_argument('-l', '--choose-link', action='store_true', dest="link", \
-        help="Whether or not to choose the link from a list of titles.")
-
-    parser.add_argument('-p', '--playlist', dest="playlist", \
-    help="Specify playlist filename. Each line should be formatted like so: SONGNAME - ARTIST")
-
-    media = parser.add_mutually_exclusive_group()
-    media.add_argument('-s', '--song', dest="song", help="Specify song name of the artist.")
-
-    media.add_argument('-A', '--album', dest="album", help="Specify album name of the artist.")
-
-
-    args = parser.parse_args(sys.argv[1:] + CONFIG["default_flags"].split(" ")[:-1])
-
-    manager = Manager(args)
-
-    if args.help:
-        global HELP
-        print (HELP)
-        exit(1)
-
-    elif args.version:
-        import pkg_resources
-        print ("\n\n" + color("Ironic Redistribution System", ["HEADER", "BOLD"]))
-        print ("Homepage: " + color("https://github.com/kepoorhampond/irs", ["OKGREEN"]))
-        print ("License: " + color("GNU", ["YELLOW"]) + " (http://www.gnu.org/licenses/gpl.html)")
-        print ("Version: " + pkg_resources.get_distribution("irs").version)
-        print ("\n")
-        exit(0)
-
-    elif args.config:
-        print (get_config_file_path())
-
-    #elif args.artist and not (args.album or args.song):
-    #    parser.error("error: must supply -A/--album or -s/--song if specifying -a/--artist")
-    #    exit(1)
-
-    elif args.playlist:
-        manager.rip_spotify_list("playlist")
-
-    elif args.user:
-        manager.rip_spotify_list("user")
-
-    elif args.album:
-        manager.rip_spotify_list("album")
-
-    elif args.song:
-        manager.rip_mp3()
-
-    else:
-        manager.console()
-
-if __name__ == "__main__":
-    main()

irs/config.py

@@ -1,19 +0,0 @@
-CONFIG = dict(
-
-    # To autostart rhythmbox with a new song:
-    # default_flags = '-c rhythmbox %(loc)s',
-    # To make choosing of links default:
-    # default_flags = '-l',
-    default_flags = '',
-
-
-    # These are necessary to download Spotify playlists
-    client_id = '',
-    client_secret = '',
-
-    # For a custom directory. Note that `~` will not work as a shortcut.
-    directory = '',
-
-    # If you want numbered file names
-    numbered_file_names = True,
-)

irs/manager.py

@@ -1,305 +0,0 @@
-# Powered by:
-import youtube_dl
-from spotipy.oauth2 import SpotifyClientCredentials
-import spotipy
-
-# Info getting
-from urllib.request import urlopen
-from urllib.parse import urlencode
-
-# Info parsing
-from re import findall
-import os, json
-from bs4 import BeautifulSoup
-
-# Local utils
-from .utils import *
-from .metadata import *
-from .config import CONFIG
-
-class Manager:
-    def __init__(self, args):
-        self.args = args
-
-    def console(self):
-
-        args = self.args
-
-        os.system("clear")
-        media = None
-
-        while type(media) is not int:
-            print (bc.HEADER)
-            print ("What type of media would you like to download?")
-            print ("\t1) Song")
-            print ("\t2) Album")
-            print ("\t3) Playlist")
-            try:
-                media = int(input(bc.YELLOW + bc.BOLD + ":: " + bc.ENDC))
-                if media not in (1, 2, 3):
-                    raise ValueError
-
-            except ValueError:
-                print (bc.FAIL + "\nPlease enter a valid number." + bc.ENDC)
-
-        if media == 1:
-            self.args.song = color_input("Song you would like to download")
-            self.rip_mp3()
-
-        elif media == 2:
-            self.args.album = color_input("Album you would like to download")
-            self.rip_spotify_list("album")
-
-        elif media == 3:
-            self.args.playlist = color_input("Playlist name to search for")
-
-            self.rip_spotify_list("playlist")
-
-    def find_mp3(self, song=None, artist=None):
-        if not song:
-            song = self.args.song
-
-        if not artist:
-            artist = self.args.artist
-
-        print (color(song, ["BOLD", "UNDERLINE"]) + ' by ' + color(artist, ["BOLD", "UNDERLINE"]))
-
-        search_terms = song + " " + artist + " lyrics"
-        query_string = urlencode({"search_query" : (search_terms)})
-
-        html_content = urlopen("http://www.youtube.com/results?" + query_string)
-        search_results = findall(r'href=\"\/watch\?v=(.{11})', html_content.read().decode())
-
-        in_title = False
-        i = -1
-        given_up_score = 0
-
-        if not self.args.link:
-            print (bc.YELLOW + "\nFinding youtube link ...", end="\r")
-            while in_title == False:
-                i += 1
-                given_up_score += 1
-
-                if given_up_score >= 10:
-                    in_title = True
-                try:
-                    audio_url = ("http://www.youtube.com/watch?v=" + search_results[i])
-                except Exception:
-                    print (bc.FAIL + "Could not find song." + bc.ENDC)
-                    exit(1)
-
-                title = strip_special_chars((BeautifulSoup(urlopen(audio_url), 'html.parser')).title.string.lower())
-                song_title = song.lower().split("/")
-
-                for song in song_title:
-                    song = strip_special_chars(song)
-                    if song in title and "full album" not in title:
-                        in_title = True
-
-            print (bc.OKGREEN + "Found youtube link!      \n" + bc.ENDC)
-        else:
-            results = []
-
-            print (bc.YELLOW + "\nFinding links ... " + bc.ENDC, end="\r")
-
-            for key in search_results[:10]:
-                results.append(BeautifulSoup(urlopen(("http://www.youtube.com/watch?v="\
-                    + key)), 'html.parser').title.string.replace(" - YouTube" , ""))
-
-            valid_choice = False
-            while valid_choice == False:
-                print (bc.HEADER + "What song would you like to download?")
-                index = 0
-                for result in results:
-                    index += 1
-                    print ("  %s) %s" % (index, result))
-                i = int(input(bc.YELLOW + bc.BOLD + ":: " + bc.ENDC))
-                if i in tuple(range(1, 11)):
-                    i -= 1
-                    valid_choice = True
-
-        return search_results[i]
-
-    def get_album_art(self, artist, album, id=None):
-        spotify = spotipy.Spotify()
-
-        if id:
-            album = spotify.album(id)
-            return album["images"][0]["url"]
-
-        results = spotify.search(q=artist + " " + album, type='album')
-        items = results['albums']['items']
-        if len(items) > 0:
-            album = items[0]['images'][0]['url']
-            return album
-
-    def rip_spotify_list(self, type):
-
-        if type == "playlist":
-            search = self.args.playlist
-
-        elif type == "album":
-            search = self.args.album
-
-        if self.args.artist:
-            search += self.args.artist
-
-        try:
-            client_credentials_manager = SpotifyClientCredentials(CONFIG["client_id"], CONFIG["client_secret"])
-            spotify = spotipy.Spotify(client_credentials_manager=client_credentials_manager)
-        except spotipy.oauth2.SpotifyOauthError:
-            spotify = spotipy.Spotify()
-
-        if type == "user":
-            items = spotify.user_playlists(self.args.user)["items"]
-            length = None
-        else:
-            results = spotify.search(q=search, type=type)
-            items = results[type + "s"]['items']
-            length = 10
-
-        songs = []
-
-        if len(items) > 0:
-            spotify_list = choose_from_spotify_list(items, length=length)
-
-            list_type = spotify_list["type"]
-            if list_type != "playlist":
-                spotify_list = eval("spotify.%s" % list_type)(spotify_list["uri"])
-            else:
-                try:
-                    spotify_list = spotify.user_playlist(spotify_list["owner"]["id"], \
-                    playlist_id=spotify_list["uri"], fields="tracks,next")
-                except spotipy.client.SpotifyException:
-                    fail_oauth()
-
-            print (bc.YELLOW + "\nFetching tracks and their metadata: " + bc.ENDC)
-
-            increment = 0
-
-            for song in spotify_list["tracks"]["items"]:
-
-                increment += 1
-                list_size = increment / len(spotify_list["tracks"]["items"])
-                drawProgressBar(list_size)
-
-                if list_type == "playlist":
-                    song = song["track"]
-
-                artist = spotify.artist(song["artists"][0]["id"])
-
-
-                if list_type == "playlist":
-                    album = (spotify.track(song["uri"])["album"])
-                else:
-                    album = spotify_list
-
-                songs.append({
-                    "name": song["name"],
-                    "artist": artist["name"],
-                    "album": album["name"],
-                    "tracknum": song["track_number"],
-                    "album_cover": album["images"][0]["url"]
-                })
-
-            print (bc.OKGREEN + "\nFound tracks:" + bc.ENDC)
-
-            print (bc.HEADER)
-            for song in songs:
-                print ("\t" + song["name"] + " - " + song["artist"])
-            print (bc.ENDC + "\n")
-
-            for song in songs:
-                self.rip_mp3(song["name"], song["artist"], album=song["album"], \
-                tracknum=song["tracknum"], album_art_url=song["album_cover"])
-
-        else:
-            print (bc.FAIL + "No results were found. Make sure to use proper spelling and capitalization." + bc.ENDC)
-            exit(1)
-
-    def rip_mp3(self, song=None, artist=None,
-        album=None, # if you want to specify an album and save a bit of time.
-        tracknum=None, # to specify the tracknumber in the album.
-        album_art_url=None, # if you want to save a lot of time trying to find album cover.
-        organize=True
-            ):
-
-
-        if not song:
-            song = self.args.song
-
-        if not artist:
-            artist = self.args.artist
-
-        audio_code = self.find_mp3(song=song, artist=artist)
-
-        if CONFIG["numbered_file_names"] and tracknum:
-            track = str(tracknum) + " - "
-        else:
-            track = ""
-
-        filename = track + strip_special_chars(song) + ".mp3"
-
-        ydl_opts = {
-            'format': 'bestaudio/best',
-            #'quiet': True,
-            'postprocessors': [{
-                'key': 'FFmpegExtractAudio',
-                'preferredcodec': 'mp3',
-            }],
-        }
-
-        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
-            ydl.download(["http://www.youtube.com/watch?v=" + audio_code])
-
-
-        artist_folder = CONFIG["directory"] + "/" + artist
-
-        if not os.path.isdir(artist_folder):
-            os.makedirs(artist_folder)
-
-        if album:
-            album_folder = CONFIG["directory"] + "/" + artist + "/" + album
-            if not os.path.isdir(album_folder):
-                os.makedirs(album_folder)
-            location = album_folder
-
-        elif not album:
-            location = artist_folder
-
-        for file in os.listdir("."):
-            if audio_code in file:
-                os.rename(file, location + "/" + filename)
-
-
-        # Metadata
-        mp3 = Metadata(location + "/" + filename, song, artist)
-
-        mp3.add_title()
-        exclaim_good("Title added: ", song)
-
-        mp3.add_artist()
-        exclaim_good("Artist added: ", artist)
-
-        test_goodness(mp3.add_album(album), "Album", "album", mp3)
-
-        test_goodness(mp3.add_release_date(), "Release Date", "date", mp3)
-
-        if tracknum:
-            mp3.add_track_number(tracknum)
-
-        try:
-            image_url = mp3.add_album_art(self.get_album_art(artist, mp3.get_attr('album')))
-            exclaim_good("Album art: ", image_url)
-        except Exception:
-            print (bc.FAIL + "Album art not added." + bc.ENDC)
-
-
-        print (color(song, ["BOLD", "UNDERLINE"]) + bc.OKGREEN + ' downloaded successfully!'+ bc.ENDC)
-        print ("")
-
-        if self.args.command:
-            loc = location + "/" + filename
-            os.system((self.args.command.replace("%(loc)s", '"%s"' % loc) + " &"))
-
-        return (location + "/" + filename)

irs/metadata.py

@@ -1,147 +0,0 @@
-# MP3 Metadata editing
-from mutagen.mp3 import MP3, EasyMP3
-from mutagen.easyid3 import EasyID3
-from mutagen.id3 import ID3, APIC
-
-# Info finding
-from urllib.parse import quote_plus, quote
-from urllib.request import urlopen, Request
-
-# Info parsing
-import json
-from re import match
-from bs4 import BeautifulSoup
-
-# Local utils
-from .utils import *
-
-# Powered by...
-import spotipy
-
-class Metadata:
-    def __init__(self, location, song, artist):
-        self.spotify = spotipy.Spotify()
-
-        self.song = song
-        self.artist = artist
-        self.location = location
-
-        self.info = self.search_google()
-        self.mp3 = MP3(self.location, ID3=EasyID3)
-
-    def get_attr(self, attr):
-        try:
-            return self.mp3[attr][0]
-        except Exception:
-            return False
-
-    def add_title(self):
-        self.mp3['title'] = self.song
-        self.mp3.save()
-        return True
-
-
-    def add_artist(self):
-        self.mp3['artist'] = self.artist
-        self.mp3.save()
-        return True
-
-
-    def add_album(self, album=None):
-        try:
-            if not album:
-                for i, j in enumerate(self.info):
-                    if "Album:" in j:
-                        album = (self.info[i + 1])
-
-            self.mp3['album'] = album
-            self.mp3.save()
-            return True
-
-        except Exception:
-            self.mp3['album'] = self.song
-            self.mp3.save()
-            return False
-
-
-    def add_release_date(self, release_date=None):
-        try:
-            if not release_date:
-                for i, j in enumerate(self.info):
-                    if "Released:" in j:
-                        date = (self.info[i + 1])
-
-            self.mp3['date'] = date
-            self.mp3.save()
-            return True
-        except UnboundLocalError:
-            return False
-
-
-    def add_track_number(self, track_number):
-        self.mp3['tracknumber'] = str(track_number)
-        self.mp3.save()
-        return True
-
-
-    def get_album_art(self, artist, album, id=None):
-        spotify = spotipy.Spotify()
-
-        if id:
-            album = spotify.album(id)
-            return album["images"][0]["url"]
-
-        results = spotify.search(q=artist + " " + album, type='album')
-        items = results['albums']['items']
-        if len(items) > 0:
-            album = items[0]['images'][0]['url']
-            return album
-
-
-    def add_album_art(self, image_url):
-        mp3 = EasyMP3(self.location, ID3=ID3)
-
-        try:
-            mp3.add_tags()
-        except Exception as e:
-            pass
-
-        if not image_url:
-            image_url = self.get_album_art(self.artist, self.mp3["album"][0])
-
-        try:
-            mp3.tags.add(
-                APIC(
-                    encoding = 3,
-                    mime = 'image/png',
-                    type = 3,
-                    desc = 'cover',
-                    data = urlopen(image_url).read()
-                )
-            )
-            mp3.save()
-            return image_url
-        except Exception:
-            return False
-
-
-    def search_google(self, search_terms=""):
-        def visible(element):
-            if element.parent.name in ['style', 'script', '[document]', 'head', 'title']:
-                return False
-            elif match('<!--.*-->', str(element)):
-                return False
-            return True
-
-        search_terms = "%s %s %s" % (self.song, self.artist, search_terms)
-        url = 'http://www.google.com/search?q=' + quote_plus(search_terms)
-
-        hdr = {
-            'User-Agent':'Mozilla/5.0',
-            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
-        }
-
-        texts = BeautifulSoup(urlopen(Request(url, \
-            headers=hdr)).read(), 'html.parser').findAll(text=True)
-
-        return list(filter(visible, texts))

irs/utils.py

@@ -1,163 +0,0 @@
-import sys, os, spotipy, irs
-
-def get_config_file_path():
-    return os.path.dirname(irs.__file__) + "/config.py"
-
-def strip_special_chars(string):
-    special_chars = "\ / : * ? \" < > | - ( )".split(" ")
-    for char in special_chars:
-        string = string.replace(char, "")
-    return string
-
-def supports_color():
-    """
-    Returns True if the running system's terminal supports color, and False
-    otherwise.
-    """
-    plat = sys.platform
-    supported_platform = plat != 'Pocket PC' and (plat != 'win32' or
-                                                  'ANSICON' in os.environ)
-    # isatty is not always implemented, #6223.
-    is_a_tty = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
-    if not supported_platform or not is_a_tty:
-        return False
-    return True
-
-if supports_color():
-    class bc:
-        HEADER = '\033[95m'
-        OKBLUE = '\033[94m'
-        OKGREEN = '\033[32m'
-        WARNING = '\033[93m'
-        FAIL = '\033[91m'
-        ENDC = '\033[0m'
-        BOLD = '\033[1m'
-        UNDERLINE = '\033[4m'
-        GRAY = '\033[30m'
-        YELLOW = '\033[33m'
-else:
-    class bc:
-        HEADER = ''
-        OKBLUE = ''
-        OKGREEN = ''
-        WARNING = ''
-        FAIL = ''
-        ENDC = ''
-        BOLD = ''
-        UNDERLINE = ''
-        GRAY = ''
-        YELLOW = ''
-
-def color(text, colors=[]):
-    if colors == []:
-        raise "Must have definitions when calling color(text, colors=[])"
-    color_string = ""
-    for color in colors:
-        color_string += "bc.%s + " % color
-    color_string = color_string[:-2]
-    return (bc.ENDC + eval(color_string) + text + bc.ENDC)
-
-def color_input(text):
-    print (bc.HEADER + text, end=" ")
-    return input(bc.BOLD + bc.YELLOW + ": " + bc.ENDC)
-
-def exclaim_good(text, item):
-    print (bc.OKGREEN + text + bc.ENDC + item)
-
-def test_goodness(test, word, metadata_id, mp3):
-    if test:
-        exclaim_good(word + " added: ", mp3.get_attr(metadata_id))
-    else:
-        print (bc.FAIL + word + " not added." + bc.ENDC)
-
-def search_google(self, search_terms=""):
-    def visible(element):
-        if element.parent.name in ['style', 'script', '[document]', 'head', 'title']:
-            return False
-        elif match('<!--.*-->', str(element)):
-            return False
-        return True
-
-    search_terms = "%s %s %s" % (self.song, self.artist, search_terms)
-    url = 'http://www.google.com/search?q=' + quote_plus(search_terms)
-
-    hdr = {
-        'User-Agent':'Mozilla/5.0',
-        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
-    }
-
-    texts = BeautifulSoup(urlopen(Request(url, \
-        headers=hdr)).read(), 'html.parser').findAll(text=True)
-
-    return list(filter(visible, texts))
-
-def unorganize(file_name, location, song_number, artist):
-
-    locations = location.split("/")
-
-    folder_name = ("playlist - " + file_name)[:40]
-
-    if not os.path.isdir(folder_name):
-        os.makedirs(folder_name)
-
-    os.rename(location, "%s/%s - %s" % (folder_name, song_number, locations[-1]))
-
-    if remove:
-        import shutil # Only import this if I have to.
-        shutil.rmtree(locations[0])
-
-
-def finish_unorganize(file_name):
-    folder_name = ("playlist - " + file_name)[:40]
-
-    os.rename(file_name, folder_name + "/" + file_name)
-
-    os.rename(folder_name, folder_name.replace("playlist - ", ""))
-
-def fail_oauth():
-    print (bc.FAIL + "To download Spotify playlists, you need to supply client_ids." + bc.ENDC)
-    print ("To do this, you'll want to create an application here:")
-    print ("https://developer.spotify.com/my-applications/#!/applications/create")
-    print ("Once you've done that, you'll want to copy your 'client id' and your 'client secret'")
-    print ("into the config file and their corresponding locations:")
-    print (get_config_file_path())
-    exit(1)
-
-def choose_from_spotify_list(thelist, length=10):
-    spotify = spotipy.Spotify()
-
-    thelist = list(thelist)
-    print ("Results:")
-    choice = ""
-    while choice not in tuple(range(0, len(thelist[:length]))):
-        for index, result in enumerate(thelist[:length]):
-            type = result["type"]
-
-            if type == "playlist":
-                info = spotify.user(result["owner"]["id"])
-                try:
-                    display_info = " (" + str(info["followers"]["total"]) + " followers)"
-                    display_info += " - " + info["display_name"]
-                except Exception:
-                    display_info = " - info couldn't be found"
-
-            elif type == "album":
-                info = spotify.album(result["id"])
-                display_info = " - " + info["artists"][0]["name"]
-
-            print ("\t" + str(index) + ") " + bc.HEADER + result["name"] + display_info + bc.ENDC)
-        choice = int(input(bc.YELLOW + "\nEnter result number: " + bc.ENDC))
-
-    return thelist[choice]
-
-def drawProgressBar(percent, barLen = 40):
-    import sys
-    sys.stdout.write("\r")
-    progress = ""
-    for i in range(barLen):
-        if i < int(barLen * percent):
-            progress += "#"
-        else:
-            progress += "-"
-    sys.stdout.write("[%s] %.2f%%" % (progress, percent * 100))
-    sys.stdout.flush()

setup.cfg

@@ -1,5 +0,0 @@
-[bdist_wheel]
-# This flag says that the code is written to work on both Python 2 and Python
-# 3. If at all possible, it is good practice to do this. If you cannot, you
-# will need to generate wheels for each Python version that you support.
-universal=1

setup.py

@@ -1,22 +0,0 @@
-from setuptools import setup
-
-setup(
-    name='irs',
-    version='4.7.22',
-    description='A music downloader that just gets metadata.',
-    url='https://github.com/kepoorhampond/irs',
-    author='Kepoor Hampond',
-    author_email='kepoorh@gmail.com',
-    license='GNU',
-    packages =['irs'],
-    install_requires=[
-      'bs4',
-      'mutagen',
-      'youtube-dl',
-      'requests',
-      'spotipy',
-    ],
-    entry_points = {
-      'console_scripts': ['irs = irs.__main__:main'],
-    },
-)

shard.lock

@@ -0,0 +1,10 @@
+version: 2.0
+shards:
+  json_mapping:
+    git: https://github.com/crystal-lang/json_mapping.cr.git
+    version: 0.1.0
+
+  ydl_binaries:
+    git: https://github.com/cooperhammond/ydl-binaries.git
+    version: 1.1.1+git.commit.c82e3937fee20fd076b1c73e24b2d0205e2cf0da
+

shard.yml

@@ -0,0 +1,17 @@
+name: irs
+version: 1.4.0
+
+authors:
+  - Cooper Hammond <kepoorh@gmail.com>
+
+targets:
+  irs:
+    main: src/irs.cr
+
+license: MIT
+
+dependencies:
+  ydl_binaries:
+    github: cooperhammond/ydl-binaries
+  json_mapping:
+    github: crystal-lang/json_mapping.cr

spec/irs_spec.cr

@@ -0,0 +1,35 @@
+require "./spec_helper"
+
+describe CLI do
+  # TODO: Write tests
+
+  it "can show help" do
+    run_CLI_with_args(["--help"])
+  end
+
+  it "can show version" do
+    run_CLI_with_args(["--version"])
+  end
+
+  # !!TODO: make a long and short version of the test suite
+  # TODO: makes so this doesn't need user input
+  it "can install ytdl and ffmpeg binaries" do
+    # run_CLI_with_args(["--install"])
+  end
+
+  it "can show config file loc" do
+    run_CLI_with_args(["--config"])
+  end
+
+  it "can download a single song" do
+    run_CLI_with_args(["--song", "Bohemian Rhapsody", "--artist", "Queen"])
+  end
+
+  it "can download an album" do
+    run_CLI_with_args(["--artist", "Arctic Monkeys", "--album", "Da Frame 2R / Matador"])
+  end
+
+  it "can download a playlist" do
+    run_CLI_with_args(["--artist", "prakkillian", "--playlist", "IRS Testing"])
+  end
+end

spec/spec_helper.cr

@@ -0,0 +1,10 @@
+require "spec"
+
+# https://github.com/mosop/stdio
+
+require "../src/bottle/cli"
+
+def run_CLI_with_args(argv : Array(String))
+    cli = CLI.new(argv)
+    cli.act_on_args
+end

src/bottle/cli.cr

@@ -0,0 +1,190 @@
+require "ydl_binaries"
+
+require "./config"
+require "./styles"
+require "./version"
+
+require "../glue/song"
+require "../glue/album"
+require "../glue/playlist"
+
+class CLI
+  # layout:
+  # [[shortflag, longflag], key, type]
+  @options = [
+    [["-h", "--help"], "help", "bool"],
+    [["-v", "--version"], "version", "bool"],
+    [["-i", "--install"], "install", "bool"],
+    [["-c", "--config"], "config", "bool"],
+    [["-a", "--artist"], "artist", "string"],
+    [["-s", "--song"], "song", "string"],
+    [["-A", "--album"], "album", "string"],
+    [["-p", "--playlist"], "playlist", "string"],
+    [["-u", "--url"], "url", "string"],
+    [["-S", "--select"], "select", "bool"],
+    [["--ask-skip"], "ask_skip", "bool"],
+    [["--apply"], "apply_file", "string"]
+  ]
+
+  @args : Hash(String, String)
+
+  def initialize(argv : Array(String))
+    @args = parse_args(argv)
+  end
+
+  def version
+    puts "irs v#{IRS::VERSION}"
+  end
+
+  def help
+    msg = <<-EOP
+    #{Style.bold "Usage: irs [--help] [--version] [--install]"}
+    #{Style.bold "           [-s <song> -a <artist>]"}
+    #{Style.bold "           [-A <album> -a <artist>]"}
+    #{Style.bold "           [-p <playlist> -a <username>]"}
+
+    #{Style.bold "Arguments:"}
+        #{Style.blue "-h, --help"}                  Show this help message and exit
+        #{Style.blue "-v, --version"}               Show the program version and exit
+        #{Style.blue "-i, --install"}               Download binaries to config location
+        #{Style.blue "-c, --config"}                Show config file location
+        #{Style.blue "-a, --artist <artist>"}       Specify artist name for downloading
+        #{Style.blue "-s, --song <song>"}           Specify song name to download
+        #{Style.blue "-A, --album <album>"}         Specify the album name to download
+        #{Style.blue "-p, --playlist <playlist>"}   Specify the playlist name to download
+        #{Style.blue "-u, --url <url>"}             Specify the youtube url to download from
+        #{Style.blue "                 "}           (for albums and playlists, the command-line
+        #{Style.blue "                 "}           argument is ignored, and it should be '')
+        #{Style.blue "-S, --select"}                Use a menu to choose each song's video source
+        #{Style.blue "--ask-skip"}                  Before every playlist/album song, ask to skip
+        #{Style.blue "--apply <file>"}              Apply metadata to a existing file
+
+    #{Style.bold "Examples:"}
+        $ #{Style.green %(irs --song "Bohemian Rhapsody" --artist "Queen")}
+        #{Style.dim %(# => downloads the song "Bohemian Rhapsody" by "Queen")}
+        $ #{Style.green %(irs --album "Demon Days" --artist "Gorillaz")}
+        #{Style.dim %(# => downloads the album "Demon Days" by "Gorillaz")}
+        $ #{Style.green %(irs --playlist "a different drummer" --artist "prakkillian")}
+        #{Style.dim %(# => downloads the playlist "a different drummer" by the user prakkillian)}
+
+    #{Style.bold "This project is licensed under the MIT license."}
+    #{Style.bold "Project page: <https://github.com/cooperhammond/irs>"}
+    EOP
+
+    puts msg
+  end
+
+  def act_on_args
+    Config.check_necessities
+
+    if @args["help"]? || @args.keys.size == 0
+      help
+
+    elsif @args["version"]?
+      version
+
+    elsif @args["install"]?
+      YdlBinaries.get_both(Config.binary_location)
+
+    elsif @args["config"]?
+      puts ENV["IRS_CONFIG_LOCATION"]?
+
+    elsif @args["song"]? && @args["artist"]?
+      s = Song.new(@args["song"], @args["artist"])
+      s.provide_client_keys(Config.client_key, Config.client_secret)
+      s.grab_it(flags: @args)
+      s.organize_it()
+
+    elsif @args["album"]? && @args["artist"]?
+      a = Album.new(@args["album"], @args["artist"])
+      a.provide_client_keys(Config.client_key, Config.client_secret)
+      a.grab_it(flags: @args)
+
+    elsif @args["playlist"]? && @args["artist"]?
+      p = Playlist.new(@args["playlist"], @args["artist"])
+      p.provide_client_keys(Config.client_key, Config.client_secret)
+      p.grab_it(flags: @args)
+
+    else
+      puts Style.red("Those arguments don't do anything when used that way.")
+      puts "Type `irs -h` to see usage."
+    end
+  end
+
+  private def parse_args(argv : Array(String)) : Hash(String, String)
+    arguments = {} of String => String
+
+    i = 0
+    current_key = ""
+    pass_next_arg = false
+    argv.each do |arg|
+      # If the previous arg was an arg flag, this is an arg, so pass it
+      if pass_next_arg
+        pass_next_arg = false
+        i += 1
+        next
+      end
+
+      flag = [] of Array(String) | String
+      valid_flag = false
+
+      @options.each do |option|
+        if option[0].includes?(arg)
+          flag = option
+          valid_flag = true
+          break
+        end
+      end
+
+      # ensure the flag is actually defined
+      if !valid_flag
+        arg_error argv, i, %("#{arg}" is an invalid flag or argument.)
+      end
+
+      # ensure there's an argument if the program needs one
+      if flag[2] == "string" && i + 1 >= argv.size
+        arg_error argv, i, %("#{arg}" needs an argument.)
+      end
+
+      key = flag[1].as(String)
+      if flag[2] == "string"
+        arguments[key] = argv[i + 1]
+        pass_next_arg = true
+      elsif flag[2] == "bool"
+        arguments[key] = "true"
+      end
+
+      i += 1
+    end
+
+    return arguments
+  end
+
+  private def arg_error(argv : Array(String), arg : Int32, msg : String) : Nil
+    precursor = "irs"
+
+    precursor += " " if arg != 0
+
+    if arg == 0
+      start = [] of String
+    else
+      start = argv[..arg - 1]
+    end
+    last = argv[arg + 1..]
+
+    distance = (precursor + start.join(" ")).size
+
+    print Style.dim(precursor + start.join(" "))
+    print Style.bold(Style.red(" " + argv[arg]).to_s)
+    puts Style.dim (" " + last.join(" "))
+
+    (0..distance).each do |i|
+      print " "
+    end
+    puts "^"
+
+    puts Style.red(Style.bold(msg).to_s)
+    puts "Type `irs -h` to see usage."
+    exit 1
+  end
+end

src/bottle/config.cr

@@ -0,0 +1,133 @@
+require "yaml"
+
+require "./styles"
+
+require "../search/spotify"
+
+EXAMPLE_CONFIG = <<-EOP
+#{Style.dim "exampleconfig.yml"}
+#{Style.dim "===="}
+#{Style.blue "search_terms"}: #{Style.green "\"lyrics\""}
+#{Style.blue "binary_directory"}: #{Style.green "~/.irs/bin"}
+#{Style.blue "music_directory"}: #{Style.green "~/Music"}
+#{Style.blue "filename_pattern"}: #{Style.green "\"{track_number} - {title}\""}
+#{Style.blue "directory_pattern"}: #{Style.green "\"{artist}/{album}\""}
+#{Style.blue "client_key"}: #{Style.green "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"}
+#{Style.blue "client_secret"}: #{Style.green "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"}
+#{Style.blue "single_folder_playlist"}: 
+  #{Style.blue "enabled"}: #{Style.green "true"}
+  #{Style.blue "retain_playlist_order"}: #{Style.green "true"}
+  #{Style.blue "unify_into_album"}: #{Style.green "false"}
+#{Style.dim "===="}
+EOP
+
+module Config
+  extend self
+
+  @@arguments = [
+    "search_terms",
+    "binary_directory",
+    "music_directory",
+    "filename_pattern",
+    "directory_pattern",
+    "client_key",
+    "client_secret",
+    "single_folder_playlist: enabled",
+    "single_folder_playlist: retain_playlist_order",
+    "single_folder_playlist: unify_into_album",
+  ]
+
+  @@conf = YAML.parse("")
+  begin
+    @@conf = YAML.parse(File.read(ENV["IRS_CONFIG_LOCATION"]))
+  rescue
+    puts Style.red "Before anything else, define the environment variable IRS_CONFIG_LOCATION pointing to a .yml file like this one."
+    puts EXAMPLE_CONFIG
+    puts Style.bold "See https://github.com/cooperhammond/irs for more information on the config file"
+    exit 1
+  end
+
+  def search_terms : String
+    return @@conf["search_terms"].to_s
+  end
+
+  def binary_location : String
+    path = @@conf["binary_directory"].to_s
+    return Path[path].expand(home: true).to_s
+  end
+
+  def music_directory : String
+    path = @@conf["music_directory"].to_s
+    return Path[path].expand(home: true).to_s
+  end
+  
+  def filename_pattern : String
+    return @@conf["filename_pattern"].to_s
+  end
+  
+  def directory_pattern : String
+    return @@conf["directory_pattern"].to_s
+  end
+
+  def client_key : String
+    return @@conf["client_key"].to_s
+  end
+
+  def client_secret : String
+    return @@conf["client_secret"].to_s
+  end
+
+  def single_folder_playlist? : Bool
+    return @@conf["single_folder_playlist"]["enabled"].as_bool
+  end
+
+  def retain_playlist_order? : Bool
+    return @@conf["single_folder_playlist"]["retain_playlist_order"].as_bool
+  end
+
+  def unify_into_album? : Bool
+    return @@conf["single_folder_playlist"]["unify_into_album"].as_bool
+  end
+
+  def check_necessities
+    missing_configs = [] of String
+    @@arguments.each do |argument|
+      if !check_conf(argument)
+        missing_configs.push(argument)
+      end
+    end
+    if missing_configs.size > 0
+      puts Style.red("You are missing the following key(s) in your YAML config file:")
+      missing_configs.each do |config|
+        puts "  " + config
+      end
+      puts "\nHere's an example of what your config should look like:"
+      puts EXAMPLE_CONFIG
+      puts Style.bold "See https://github.com/cooperhammond/irs for more information on the config file"
+      exit 1
+    end
+    spotify = SpotifySearcher.new
+    spotify.authorize(self.client_key, self.client_secret)
+    if !spotify.authorized?
+      puts Style.red("There's something wrong with your client key and/or client secret")
+      puts "Get your keys from https://developer.spotify.com/dashboard, and enter them in your config file"
+      puts "Your config file is at #{ENV["IRS_CONFIG_LOCATION"]}"
+      puts EXAMPLE_CONFIG
+      puts Style.bold "See https://github.com/cooperhammond/irs for more information on the config file"
+      exit 1
+    end
+  end
+
+  private def check_conf(key : String) : YAML::Any?
+    if key.includes?(": ")
+      args = key.split(": ")
+      if @@conf[args[0]]?
+        return @@conf[args[0]][args[1]]?
+      else
+        return @@conf[args[0]]?
+      end
+    else
+      return @@conf[key]?
+    end
+  end
+end

src/bottle/pattern.cr

@@ -0,0 +1,28 @@
+module Pattern
+  extend self
+
+  def parse(formatString : String, metadata : JSON::Any)
+    formatted : String = formatString
+
+    date : Array(String) = (metadata["album"]? || JSON.parse("{}"))["release_date"]?.to_s.split('-')
+
+    keys : Hash(String, String) = {
+      "artist" => ((metadata.dig?("artists") || JSON.parse("{}"))[0]? || JSON.parse("{}"))["name"]?.to_s,
+      "title" => metadata["name"]?.to_s,
+      "album" => (metadata["album"]? || JSON.parse("{}"))["name"]?.to_s,
+      "track_number" => metadata["track_number"]?.to_s,
+      "disc_number" => metadata["disc_number"]?.to_s,
+      "total_tracks" => (metadata["album"]? || JSON.parse("{}"))["total_tracks"]?.to_s,
+      "year" => date[0]?.to_s,
+      "month" => date[1]?.to_s,
+      "day" => date[2]?.to_s,
+      "id" => metadata["id"]?.to_s
+    }
+
+    keys.each do |pair|
+      formatted = formatted.gsub("{#{pair[0]}}", pair[1] || "")
+    end
+
+    return formatted
+  end
+end

src/bottle/styles.cr

@@ -0,0 +1,23 @@
+require "colorize"
+
+class Style
+  def self.bold(txt)
+    txt.colorize.mode(:bold).to_s
+  end
+
+  def self.dim(txt)
+    txt.colorize.mode(:dim).to_s
+  end
+
+  def self.blue(txt)
+    txt.colorize(:light_blue).to_s
+  end
+
+  def self.green(txt)
+    txt.colorize(:light_green).to_s
+  end
+
+  def self.red(txt)
+    txt.colorize(:light_red).to_s
+  end
+end

src/bottle/version.cr

@@ -0,0 +1,3 @@
+module IRS
+  VERSION = "1.4.0"
+end

src/glue/album.cr

@@ -0,0 +1,47 @@
+require "../bottle/config"
+
+require "./mapper"
+require "./song"
+require "./list"
+
+class Album < SpotifyList
+  @home_music_directory = Config.music_directory
+
+  # Uses the `spotify_searcher` defined in parent `SpotifyList` to find the
+  # correct metadata of the list
+  def find_it : JSON::Any
+    album = @spotify_searcher.find_item("album", {
+      "name"   => @list_name.as(String),
+      "artist" => @list_author.as(String),
+    })
+    if album
+      return album.as(JSON::Any)
+    else
+      puts "No album was found by that name and artist."
+      exit 1
+    end
+  end
+
+  # Will define specific metadata that may not be included in the raw return
+  # of spotify's album json. Moves the title of the album and the album art
+  # to the json of the single song
+  def organize_song_metadata(list : JSON::Any, datum : JSON::Any) : JSON::Any
+    album_metadata = parse_to_json(%(
+      {
+        "name": "#{list["name"]}",
+        "images": [{"url": "#{list["images"][0]["url"]}"}]
+      }
+    ))
+
+    prepped_data = TrackMapper.from_json(datum.to_json)
+    prepped_data.album = album_metadata
+
+    data = parse_to_json(prepped_data.to_json)
+
+    return data
+  end
+
+  private def organize(song : Song)
+    song.organize_it()
+  end
+end

src/glue/list.cr

@@ -0,0 +1,107 @@
+require "json"
+
+require "../search/spotify"
+require "../search/youtube"
+
+require "../interact/ripper"
+require "../interact/tagger"
+
+require "./song"
+
+# A parent class for downloading albums and playlists from spotify
+abstract class SpotifyList
+  @spotify_searcher = SpotifySearcher.new
+  @file_names = [] of String
+
+  @outputs : Hash(String, Array(String)) = {
+    "searching" => [
+      Style.bold("Searching for %l by %a ... \r"),
+      Style.green("+ ") + Style.bold("%l by %a                                 \n")
+    ],
+    "url" => [
+      Style.bold("When prompted for a URL, provide a youtube URL or press enter to scrape for one\n")
+    ]
+  }
+
+  def initialize(@list_name : String, @list_author : String?)
+  end
+
+  # Finds the list, and downloads all of the songs using the `Song` class
+  def grab_it(flags = {} of String => String)
+    ask_url = flags["url"]?
+    ask_skip = flags["ask_skip"]?
+    is_playlist = flags["playlist"]?
+  
+    if !@spotify_searcher.authorized?
+      raise("Need to call provide_client_keys on Album or Playlist class.")
+    end
+
+    if ask_url
+      outputter("url", 0)
+    end
+
+    outputter("searching", 0)
+    list = find_it()
+    outputter("searching", 1)
+    contents = list["tracks"]["items"].as_a
+
+    i = 0
+    contents.each do |datum|
+      i += 1
+      if datum["track"]?
+        datum = datum["track"]
+      end
+
+      data = organize_song_metadata(list, datum)
+
+      s_name = data["name"].to_s
+      s_artist = data["artists"][0]["name"].to_s
+
+      song = Song.new(s_name, s_artist)
+      song.provide_spotify(@spotify_searcher)
+      song.provide_metadata(data)
+
+      puts Style.bold("[#{i}/#{contents.size}]")
+
+      unless ask_skip && skip?(s_name, s_artist, is_playlist)
+        song.grab_it(flags: flags)
+        organize(song)
+      else
+        puts "Skipping..."
+      end
+    end
+  end
+
+  # Will authorize the class associated `SpotifySearcher`
+  def provide_client_keys(client_key : String, client_secret : String)
+    @spotify_searcher.authorize(client_key, client_secret)
+  end
+
+  private def skip?(name, artist, is_playlist)
+    print "Skip #{Style.blue name}" +
+      (is_playlist ? " (by #{Style.green artist})": "") + "? "
+    response = gets
+    return response && response.lstrip.downcase.starts_with? "y"
+  end
+
+  private def outputter(key : String, index : Int32)
+    text = @outputs[key][index]
+      .gsub("%l", @list_name)
+      .gsub("%a", @list_author)
+    print text
+  end
+
+  # Defined in subclasses, will return the appropriate information or call an
+  # error if the info is not found and exit
+  abstract def find_it : JSON::Any
+
+  # If there's a need to organize the individual song data so that the `Song`
+  # class can better handle it, this function will be defined in the subclass
+  private abstract def organize_song_metadata(list : JSON::Any,
+                                              datum : JSON::Any) : JSON::Any
+
+  # Will define the specific type of organization for a list of songs.
+  # Needed because most people want albums sorted by artist, but playlists all
+  # in one folder
+  private abstract def organize(song : Song)
+end

src/glue/mapper.cr

@@ -0,0 +1,57 @@
+require "json"
+require "json_mapping"
+
+class PlaylistExtensionMapper
+  JSON.mapping(
+    tracks: {
+      type:   PlaylistTracksMapper,
+      setter: true,
+    },
+    id: String,
+    images: JSON::Any,
+    name: String,
+    owner: JSON::Any,
+    type: String
+  )
+end
+
+class PlaylistTracksMapper
+  JSON.mapping(
+    items: {
+      type:   Array(JSON::Any),
+      setter: true,
+    },
+    total: Int32
+  )
+end
+
+class TrackMapper
+  JSON.mapping(
+    album: {
+      type:    JSON::Any,
+      nilable: true,
+      setter:  true,
+    },
+    artists: {
+      type: Array(JSON::Any),
+      setter: true  
+    },
+    disc_number: {
+      type: Int32,
+      setter: true
+    },
+    id: String,
+    name: String,
+    track_number: {
+      type: Int32,
+      setter: true
+    },
+    duration_ms: Int32,
+    type: String,
+    uri: String
+  )
+end
+
+def parse_to_json(string_json : String) : JSON::Any
+  return JSON.parse(string_json)
+end

src/glue/playlist.cr

@@ -0,0 +1,76 @@
+require "json"
+
+require "../bottle/config"
+
+require "./song"
+require "./list"
+require "./mapper"
+
+class Playlist < SpotifyList
+  @song_index = 1
+  @home_music_directory = Config.music_directory
+  @playlist : JSON::Any?
+
+  # Uses the `spotify_searcher` defined in parent `SpotifyList` to find the
+  # correct metadata of the list
+  def find_it : JSON::Any
+    @playlist = @spotify_searcher.find_item("playlist", {
+      "name"     => @list_name.as(String),
+      "username" => @list_author.as(String),
+    })
+    if @playlist
+      return @playlist.as(JSON::Any)
+    else
+      puts "No playlists were found by that name and user."
+      exit 1
+    end
+  end
+
+  # Will define specific metadata that may not be included in the raw return
+  # of spotify's album json. Moves the title of the album and the album art
+  # to the json of the single song
+  def organize_song_metadata(list : JSON::Any, datum : JSON::Any) : JSON::Any
+    data = datum
+
+    if Config.retain_playlist_order?
+      track = TrackMapper.from_json(data.to_json)
+      track.track_number = @song_index
+      track.disc_number = 1
+      data = JSON.parse(track.to_json)
+    end
+
+    if Config.unify_into_album?
+      track = TrackMapper.from_json(data.to_json)
+      track.album = JSON.parse(%({
+        "name": "#{list["name"]}",
+        "images": [{"url": "#{list["images"][0]["url"]}"}]
+      }))
+      track.artists.push(JSON.parse(%({
+        "name": "#{list["owner"]["display_name"]}",
+        "owner": true
+      })))
+      data = JSON.parse(track.to_json)
+    end
+
+    @song_index += 1
+
+    return data
+  end
+
+  private def organize(song : Song)
+    if Config.single_folder_playlist?
+      path = Path[@home_music_directory].expand(home: true)
+      path = path / @playlist.as(JSON::Any)["name"].to_s
+        .gsub(/[\/]/, "").gsub("  ", " ")
+      strpath = path.to_s
+      if !File.directory?(strpath)
+        FileUtils.mkdir_p(strpath)
+      end
+      safe_filename = song.filename.gsub(/[\/]/, "").gsub("  ", " ")
+      FileUtils.cp("./" + song.filename, (path / safe_filename).to_s)
+      FileUtils.rm("./" + song.filename)
+    else
+      song.organize_it()
+    end
+  end
+end

src/glue/song.cr

@@ -0,0 +1,245 @@
+require "../search/spotify"
+require "../search/youtube"
+
+require "../interact/ripper"
+require "../interact/tagger"
+
+require "../bottle/config"
+require "../bottle/pattern"
+require "../bottle/styles"
+
+class Song
+  @spotify_searcher = SpotifySearcher.new
+  @client_id = ""
+  @client_secret = ""
+
+  @metadata : JSON::Any?
+  getter filename = ""
+  @artist = ""
+  @album = ""
+
+  @outputs : Hash(String, Array(String)) = {
+    "intro" => [Style.bold("[%s by %a]\n")],
+    "metadata" => [
+      "  Searching for metadata ...\r",
+      Style.green("  + ") + Style.dim("Metadata found                  \n")
+    ],
+    "url" => [
+      "  Searching for URL ...\r",
+      Style.green("  + ") + Style.dim("URL found                       \n"),
+      "  Validating URL ...\r",
+      Style.green("  + ") + Style.dim("URL validated                   \n"),
+      "  URL?: "
+    ],
+    "download" => [
+      "  Downloading video:\n",
+      Style.green("\r  + ") + Style.dim("Converted to mp3              \n")
+    ],
+    "albumart" => [
+      "  Downloading album art ...\r",
+      Style.green("  + ") + Style.dim("Album art downloaded            \n")
+    ],
+    "tagging" => [
+      "  Attaching metadata ...\r",
+      Style.green("  + ") + Style.dim("Metadata attached               \n")
+    ],
+    "finished" => [
+      Style.green("  + ") + "Finished!\n"
+    ]
+  }
+
+  def initialize(@song_name : String, @artist_name : String)
+  end
+
+  # Find, downloads, and tags the mp3 song that this class represents.
+  # Optionally takes a youtube URL to download from
+  #
+  # ```
+  # Song.new("Bohemian Rhapsody", "Queen").grab_it
+  # ```
+  def grab_it(url : (String | Nil) = nil, flags = {} of String => String)
+    passed_url : (String | Nil) = flags["url"]?
+    passed_file : (String | Nil) = flags["apply_file"]?
+    select_link = flags["select"]?
+
+    outputter("intro", 0)
+
+    if !@spotify_searcher.authorized? && !@metadata
+      if @client_id != "" && @client_secret != ""
+        @spotify_searcher.authorize(@client_id, @client_secret)
+      else
+        raise("Need to call either `provide_metadata`, `provide_spotify`, " +
+              "or `provide_client_keys` so that Spotify can be interfaced with.")
+      end
+    end
+
+    if !@metadata
+      outputter("metadata", 0)
+      @metadata = @spotify_searcher.find_item("track", {
+        "name"   => @song_name,
+        "artist" => @artist_name,
+      })
+
+      if !@metadata
+        raise("There was no metadata found on Spotify for " +
+              %("#{@song_name}" by "#{@artist_name}". ) +
+              "Check your input and try again.")
+      end
+      outputter("metadata", 1)
+    end
+
+    data = @metadata.as(JSON::Any)
+    @song_name = data["name"].as_s
+    @artist_name = data["artists"][0]["name"].as_s
+    @filename = "#{Pattern.parse(Config.filename_pattern, data)}.mp3"
+
+    if passed_file
+      puts Style.green("  +") + Style.dim(" Moving file: ") + passed_file
+      File.rename(passed_file, @filename)
+    else
+      if passed_url
+        if passed_url.strip != ""
+          url = passed_url
+        else
+          outputter("url", 4)
+          url = gets
+          if !url.nil? && url.strip == ""
+            url = nil
+          end
+        end
+      end
+
+      if !url
+        outputter("url", 0)
+        url = Youtube.find_url(data, flags: flags)
+        if !url
+          raise("There was no url found on youtube for " +
+                %("#{@song_name}" by "#{@artist_name}. ) +
+                "Check your input and try again.")
+        end
+        outputter("url", 1)
+      else
+        outputter("url", 2)
+        url = Youtube.validate_url(url)
+        if !url
+          raise("The url is an invalid youtube URL " +
+                "Check the URL and try again")
+        end
+        outputter("url", 3)
+      end
+
+      outputter("download", 0)
+      Ripper.download_mp3(url.as(String), @filename)
+      outputter("download", 1)
+    end
+
+    outputter("albumart", 0)
+    temp_albumart_filename = ".tempalbumart.jpg"
+    HTTP::Client.get(data["album"]["images"][0]["url"].as_s) do |response|
+      File.write(temp_albumart_filename, response.body_io)
+    end
+    outputter("albumart", 0)
+
+    # check if song's metadata has been modded in playlist, update artist accordingly
+    if data["artists"][-1]["owner"]?
+      @artist = data["artists"][-1]["name"].as_s
+    else
+      @artist = data["artists"][0]["name"].as_s
+    end
+    @album = data["album"]["name"].as_s
+
+    tagger = Tags.new(@filename)
+    tagger.add_album_art(temp_albumart_filename)
+    tagger.add_text_tag("title", data["name"].as_s)
+    tagger.add_text_tag("artist", @artist)
+
+    if !@album.empty?
+      tagger.add_text_tag("album", @album)
+    end
+
+    if genre = @spotify_searcher.find_genre(data["artists"][0]["id"].as_s)
+      tagger.add_text_tag("genre", genre)
+    end
+
+    tagger.add_text_tag("track", data["track_number"].to_s)
+    tagger.add_text_tag("disc", data["disc_number"].to_s)
+
+    outputter("tagging", 0)
+    tagger.save
+    File.delete(temp_albumart_filename)
+    outputter("tagging", 1)
+
+    outputter("finished", 0)
+  end
+
+  # Will organize the song into the user's provided music directory
+  # in the user's provided structure
+  # Must be called AFTER the song has been downloaded.
+  #
+  # ```
+  # s = Song.new("Bohemian Rhapsody", "Queen").grab_it
+  # s.organize_it()
+  # # With
+  # # directory_pattern = "{artist}/{album}"
+  # # filename_pattern = "{track_number} - {title}"
+  # # Mp3 will be moved to
+  # # /home/cooper/Music/Queen/A Night At The Opera/1 - Bohemian Rhapsody.mp3
+  # ```
+  def organize_it()
+    path = Path[Config.music_directory].expand(home: true)
+    Pattern.parse(Config.directory_pattern, @metadata.as(JSON::Any)).split('/').each do |dir|
+      path = path / dir.gsub(/[\/]/, "").gsub("  ", " ")
+    end
+    strpath = path.to_s
+    if !File.directory?(strpath)
+      FileUtils.mkdir_p(strpath)
+    end
+    safe_filename = @filename.gsub(/[\/]/, "").gsub("  ", " ")
+    FileUtils.cp("./" + @filename, (path / safe_filename).to_s)
+    FileUtils.rm("./" + @filename)
+  end
+
+  # Provide metadata so that it doesn't have to find it. Useful for overwriting
+  # metadata. Must be called if provide_client_keys and provide_spotify are not
+  # called.
+  #
+  # ```
+  # Song.new(...).provide_metadata(...).grab_it
+  # ```
+  def provide_metadata(metadata : JSON::Any) : self
+    @metadata = metadata
+    return self
+  end
+
+  # Provide an already authenticated `SpotifySearcher` class. Useful to avoid
+  # authenticating over and over again. Must be called if provide_metadata and
+  # provide_client_keys are not called.
+  #
+  # ```
+  # Song.new(...).provide_spotify(SpotifySearcher.new
+  #   .authenticate("XXXXXXXXXX", "XXXXXXXXXXX")).grab_it
+  # ```
+  def provide_spotify(spotify : SpotifySearcher) : self
+    @spotify_searcher = spotify
+    return self
+  end
+
+  # Provide spotify client keys. Must be called if provide_metadata and
+  # provide_spotify are not called.
+  #
+  # ```
+  # Song.new(...).provide_client_keys("XXXXXXXXXX", "XXXXXXXXX").grab_it
+  # ```
+  def provide_client_keys(client_id : String, client_secret : String) : self
+    @client_id = client_id
+    @client_secret = client_secret
+    return self
+  end
+
+  private def outputter(key : String, index : Int32)
+    text = @outputs[key][index]
+      .gsub("%s", @song_name)
+      .gsub("%a", @artist_name)
+    print text
+  end
+end

src/interact/future.cr

@@ -0,0 +1,157 @@
+# copy and pasted from crystal 0.33.1
+# https://github.com/crystal-lang/crystal/blob/18e76172444c7bd07f58bf360bc21981b667668d/src/concurrent/future.cr#L138
+
+
+# :nodoc:
+class Concurrent::Future(R)
+  enum State
+    Idle
+    Delayed
+    Running
+    Completed
+    Canceled
+  end
+
+  @value : R?
+  @error : Exception?
+  @delay : Float64
+
+  def initialize(run_immediately = true, delay = 0.0, &@block : -> R)
+    @state = State::Idle
+    @value = nil
+    @error = nil
+    @channel = Channel(Nil).new
+    @delay = delay.to_f
+    @cancel_msg = nil
+
+    spawn_compute if run_immediately
+  end
+
+  def get
+    wait
+    value_or_raise
+  end
+
+  def success?
+    completed? && !@error
+  end
+
+  def failure?
+    completed? && @error
+  end
+
+  def canceled?
+    @state == State::Canceled
+  end
+
+  def completed?
+    @state == State::Completed
+  end
+
+  def running?
+    @state == State::Running
+  end
+
+  def delayed?
+    @state == State::Delayed
+  end
+
+  def idle?
+    @state == State::Idle
+  end
+
+  def cancel(msg = "Future canceled, you reached the [End of Time]")
+    return if @state >= State::Completed
+    @state = State::Canceled
+    @cancel_msg = msg
+    @channel.close
+    nil
+  end
+
+  private def compute
+    return if @state >= State::Delayed
+    run_compute
+  end
+
+  private def spawn_compute
+    return if @state >= State::Delayed
+
+    @state = @delay > 0 ? State::Delayed : State::Running
+
+    spawn { run_compute }
+  end
+
+  private def run_compute
+    delay = @delay
+
+    if delay > 0
+      sleep delay
+      return if @state >= State::Canceled
+      @state = State::Running
+    end
+
+    begin
+      @value = @block.call
+    rescue ex
+      @error = ex
+    ensure
+      @channel.close
+      @state = State::Completed
+    end
+  end
+
+  private def wait
+    return if @state >= State::Completed
+    compute
+    @channel.receive?
+  end
+
+  private def value_or_raise
+    raise Exception.new(@cancel_msg) if @state == State::Canceled
+
+    value = @value
+    if value.is_a?(R)
+      value
+    elsif error = @error
+      raise error
+    else
+      raise "compiler bug"
+    end
+  end
+end
+
+# Spawns a `Fiber` to compute *&block* in the background after *delay* has elapsed.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# May be canceled before *&block* is called by calling `cancel`.
+# ```
+# d = delay(1) { Process.kill(Process.pid) }
+# long_operation
+# d.cancel
+# ```
+def delay(delay, &block : -> _)
+  Concurrent::Future.new delay: delay, &block
+end
+
+# Spawns a `Fiber` to compute *&block* in the background.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# ```
+# f = future { http_request }
+# ... other actions ...
+# f.get #=> String
+# ```
+def future(&exp : -> _)
+  Concurrent::Future.new &exp
+end
+
+# Conditionally spawns a `Fiber` to run *&block* in the background.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# *&block* doesn't run by default, only when `get` is called.
+# ```
+# l = lazy { expensive_computation }
+# spawn { maybe_use_computation(l) }
+# spawn { maybe_use_computation(l) }
+# ```
+def lazy(&block : -> _)
+  Concurrent::Future.new run_immediately: false, &block
+end
+

src/interact/logger.cr

@@ -0,0 +1,90 @@
+require "./future"
+
+class Logger
+  @done_signal = "---DONE---"
+
+  @command : String
+
+  # *command* is the bash command that you want to run and capture the output
+  # of. *@log_name* is the name of the log file you want to temporarily create.
+  # *@sleept* is the time you want to wait before rechecking if the command has
+  # started yet, probably something you don't want to worry about
+  def initialize(command : String, @log_name : String, @sleept = 0.01)
+    # Have the command output its information to a log and after the command is
+    # finished, append an end signal to the document
+    @command = "#{command} > #{@log_name} "            # standard output to log
+    @command += "2> #{@log_name} && "                  # errors to log
+    @command += "echo #{@done_signal} >> #{@log_name}" #
+  end
+
+  # Run @command in the background and pipe its output to the log file, with
+  # something constantly monitoring the log file and yielding each new line to
+  # the block call. Useful for changing the output of binaries you don't have
+  # much control over.
+  # Note that the created temp log will be deleted unless the command fails
+  # its exit or .start is called with delete_file: false
+  #
+  # ```
+  # l = Logger.new(".temp.log", %(echo "CIA spying" && sleep 2 && echo "new veggie tales season"))
+  # l.start do |output, index|
+  #   case output
+  #   when "CIA spying"
+  #     puts "i sleep"
+  #   when .includes?("veggie tales")
+  #     puts "real shit"
+  #   end
+  # end
+  # ```
+  def start(delete_file = true, &block) : Bool
+    # Delete the log if it already exists
+    File.delete(@log_name) if File.exists?(@log_name)
+
+    # Run the command in the background
+    called = future {
+      system(@command)
+    }
+
+    # Wait for the log file to be written to
+    while !File.exists?(@log_name)
+      sleep @sleept
+    end
+
+    log = File.open(@log_name)
+    log_content = read_file(log)
+    index = 0
+
+    while true
+      temp_content = read_file(log)
+
+      # make sure that there is new data
+      if temp_content.size > 0 && log_content != temp_content
+        log_content = temp_content
+
+        # break the loop if the command has completed
+        break if log_content[0] == @done_signal
+
+        # give the line and index to the block
+        yield log_content[0], index
+        index += 1
+      end
+    end
+
+    status = called.get
+    if status == true && delete_file == true
+      log.delete
+    end
+
+    return called.get
+  end
+
+  # Reads each line of the file into an Array of Strings
+  private def read_file(file : IO) : Array(String)
+    content = [] of String
+
+    file.each_line do |line|
+      content.push(line)
+    end
+
+    return content
+  end
+end

src/interact/ripper.cr

@@ -0,0 +1,67 @@
+require "./logger"
+require "../bottle/config"
+require "../bottle/styles"
+
+module Ripper
+  extend self
+
+  BIN_LOC = Path[Config.binary_location]
+
+  # Downloads the video from the given *video_url* using the youtube-dl binary
+  # Will create any directories that don't exist specified in *output_filename*
+  #
+  # ```
+  # Ripper.download_mp3("https://youtube.com/watch?v=0xnciFWAqa0",
+  #   "Queen/A Night At The Opera/Bohemian Rhapsody.mp3")
+  # ```
+  def download_mp3(video_url : String, output_filename : String)
+    ydl_loc = BIN_LOC.join("youtube-dl")
+
+    # remove the extension that will be added on by ydl
+    output_filename = output_filename.split(".")[..-2].join(".")
+
+    options = {
+      "--output" => %("#{output_filename}.%(ext)s"), # auto-add correct ext
+      # "--quiet" => "",
+      "--verbose"         => "",
+      "--ffmpeg-location" => BIN_LOC,
+      "--extract-audio"   => "",
+      "--audio-format"    => "mp3",
+      "--audio-quality"   => "0",
+    }
+
+    command = ydl_loc.to_s + " " + video_url
+    options.keys.each do |option|
+      command += " #{option} #{options[option]}"
+    end
+
+    l = Logger.new(command, ".ripper.log")
+    o = RipperOutputCensor.new
+
+    return l.start do |line, index|
+      o.censor_output(line, index)
+    end
+  end
+
+  # An internal class that will keep track of what to output to the user or
+  # what should be hidden.
+  private class RipperOutputCensor
+    @dl_status_index = 0
+
+    def censor_output(line : String, index : Int32)
+      case line
+      when .includes? "[download]"
+        if @dl_status_index != 0
+          print "\e[1A"
+          print "\e[0K\r"
+        end
+        puts line.sub("[download]", "   ")
+        @dl_status_index += 1
+
+        if line.includes? "100%"
+          print "  Converting to mp3 ..."
+        end
+      end
+    end
+  end
+end

src/interact/tagger.cr

@@ -0,0 +1,62 @@
+require "../bottle/config"
+
+# Uses FFMPEG binary to add metadata to mp3 files
+# ```
+# t = Tags.new("bohem rap.mp3")
+# t.add_album_art("a night at the opera album cover.jpg")
+# t.add_text_tag("title", "Bohemian Rhapsody")
+# t.save
+# ```
+class Tags
+  # TODO: export this path to a config file
+  @BIN_LOC = Config.binary_location
+  @query_args = [] of String
+
+  # initialize the class with an already created MP3
+  def initialize(@filename : String)
+    if !File.exists?(@filename)
+      raise "MP3 not found at location: #{@filename}"
+    end
+
+    @query_args.push(%(-i "#{@filename}"))
+  end
+
+  # Add album art to the mp3. Album art must be added BEFORE text tags are.
+  # Check the usage above to see a working example.
+  def add_album_art(image_location : String) : Nil
+    if !File.exists?(image_location)
+      raise "Image file not found at location: #{image_location}"
+    end
+
+    @query_args.push(%(-i "#{image_location}"))
+    @query_args.push("-map 0:0 -map 1:0")
+    @query_args.push("-c copy")
+    @query_args.push("-id3v2_version 3")
+    @query_args.push(%(-metadata:s:v title="Album cover"))
+    @query_args.push(%(-metadata:s:v comment="Cover (front)"))
+    @query_args.push(%(-metadata:s:v title="Album cover"))
+  end
+
+  # Add a text tag to the mp3. If you want to see what text tags are supported,
+  # check out: https://wiki.multimedia.cx/index.php?title=FFmpeg_Metadata
+  def add_text_tag(key : String, value : String) : Nil
+    @query_args.push(%(-metadata #{key}="#{value}"))
+  end
+
+  # Run the necessary commands to attach album art to the mp3
+  def save : Nil
+    @query_args.push(%("_#{@filename}"))
+    command = @BIN_LOC + "/ffmpeg " + @query_args.join(" ")
+
+    l = Logger.new(command, ".tagger.log")
+    l.start { |line, start| }
+
+    File.delete(@filename)
+    File.rename("_" + @filename, @filename)
+  end
+end
+
+# a = Tags.new("test.mp3")
+# a.add_text_tag("title", "Warwick Avenue")
+# a.add_album_art("file.png")
+# a.save()

src/irs.cr

@@ -0,0 +1,8 @@
+require "./bottle/cli"
+
+def main
+  cli = CLI.new(ARGV)
+  cli.act_on_args
+end
+
+main()

src/search/ranking.cr

@@ -0,0 +1,144 @@
+alias VID_VALUE_CLASS = String
+alias VID_METADATA_CLASS = Hash(String, VID_VALUE_CLASS)
+alias YT_METADATA_CLASS = Array(VID_METADATA_CLASS)
+
+module Ranker
+  extend self
+
+  GARBAGE_PHRASES = [
+    "cover", "album", "live", "clean", "version", "full", "full album", "row",
+    "at", "@", "session", "how to", "npr music", "reimagined", "version",
+    "trailer"
+  ]
+
+  GOLDEN_PHRASES = [
+    "official video", "official music video",
+  ]
+
+  # Will rank videos according to their title and the user input, returns a sorted array of hashes
+  # of the points a song was assigned and its original index
+  # *spotify_metadata* is the metadate (from spotify) of the song that you want
+  # *yt_metadata* is an array of hashes with metadata scraped from the youtube search result page
+  # *query* is the query that you submitted to youtube for the results you now have
+  # ```
+  # Ranker.rank_videos(spotify_metadata, yt_metadata, query)
+  # => [
+  #      {"points" => x, "index" => x},
+  #      ...
+  #    ]
+  # ```
+  # "index" corresponds to the original index of the song in yt_metadata
+  def rank_videos(spotify_metadata : JSON::Any, yt_metadata : YT_METADATA_CLASS,
+                  query : String) : Array(Hash(String, Int32))
+    points = [] of Hash(String, Int32)
+    index = 0
+
+    actual_song_name = spotify_metadata["name"].as_s
+    actual_artist_name = spotify_metadata["artists"][0]["name"].as_s
+
+    yt_metadata.each do |vid|
+      pts = 0
+
+      pts += points_string_compare(actual_song_name, vid["title"])
+      pts += points_string_compare(actual_artist_name, vid["title"])
+      pts += count_buzzphrases(query, vid["title"])
+      pts += compare_timestamps(spotify_metadata, vid)
+
+      points.push({
+        "points" => pts,
+        "index"  => index,
+      })
+      index += 1
+    end
+
+    # Sort first by points and then by original index of the song
+    points.sort! { |a, b|
+      if b["points"] == a["points"]
+        a["index"] <=> b["index"]
+      else
+        b["points"] <=> a["points"]
+      end
+    }
+
+    return points
+  end
+
+  # SINGULAR COMPONENT OF RANKING ALGORITHM
+  private def compare_timestamps(spotify_metadata : JSON::Any, node : VID_METADATA_CLASS) : Int32
+    # puts spotify_metadata.to_pretty_json()
+    actual_time = spotify_metadata["duration_ms"].as_i
+    vid_time = node["duration_ms"].to_i
+
+    difference = (actual_time - vid_time).abs 
+
+    # puts "actual: #{actual_time}, vid: #{vid_time}"
+    # puts "\tdiff: #{difference}"
+    # puts "\ttitle: #{node["title"]}"
+
+    if difference <= 1000
+      return 3
+    elsif difference <= 2000
+      return 2
+    elsif difference <= 5000
+      return 1
+    else 
+      return 0
+    end
+  end
+
+  # SINGULAR COMPONENT OF RANKING ALGORITHM
+  # Returns an `Int` based off the number of points worth assigning to the
+  # matchiness of the string. First the strings are downcased and then all
+  # nonalphanumeric characters are stripped.
+  # If *item1* includes *item2*, return 3 pts.
+  # If after the items have been blanked, *item1* includes *item2*,
+  #   return 1 pts.
+  # Else, return 0 pts.
+  private def points_string_compare(item1 : String, item2 : String) : Int32
+    if item2.includes?(item1)
+      return 3
+    end
+
+    item1 = item1.downcase.gsub(/[^a-z0-9]/, "")
+    item2 = item2.downcase.gsub(/[^a-z0-9]/, "")
+
+    if item2.includes?(item1)
+      return 1
+    else
+      return 0
+    end
+  end
+
+  # SINGULAR COMPONENT OF RANKING ALGORITHM
+  # Checks if there are any phrases in the title of the video that would
+  # indicate audio having what we want.
+  # *video_name* is the title of the video, and *query* is what the user the
+  # program searched for. *query* is needed in order to make sure we're not
+  # subtracting points from something that's naturally in the title
+  private def count_buzzphrases(query : String, video_name : String) : Int32
+    good_phrases = 0
+    bad_phrases = 0
+
+    GOLDEN_PHRASES.each do |gold_phrase|
+      gold_phrase = gold_phrase.downcase.gsub(/[^a-z0-9]/, "")
+
+      if query.downcase.gsub(/[^a-z0-9]/, "").includes?(gold_phrase)
+        next
+      elsif video_name.downcase.gsub(/[^a-z0-9]/, "").includes?(gold_phrase)
+        good_phrases += 1
+      end
+    end
+
+    GARBAGE_PHRASES.each do |garbage_phrase|
+      garbage_phrase = garbage_phrase.downcase.gsub(/[^a-z0-9]/, "")
+
+      if query.downcase.gsub(/[^a-z0-9]/, "").includes?(garbage_phrase)
+        next
+      elsif video_name.downcase.gsub(/[^a-z0-9]/, "").includes?(garbage_phrase)
+        bad_phrases += 1
+      end
+    end
+
+    return good_phrases - bad_phrases
+  end
+end

src/search/spotify.cr

@@ -0,0 +1,349 @@
+require "http"
+require "json"
+require "base64"
+
+require "../glue/mapper"
+
+class SpotifySearcher
+  @root_url = Path["https://api.spotify.com/v1/"]
+
+  @access_header : (HTTP::Headers | Nil) = nil
+  @authorized = false
+
+  # Saves an access token for future program use with spotify using client IDs.
+  # Specs defined on spotify's developer api:
+  # https://developer.spotify.com/documentation/general/guides/authorization-guide/#client-credentials-flow
+  #
+  # ```
+  # SpotifySearcher.new.authorize("XXXXXXXXXX", "XXXXXXXXXX")
+  # ```
+  def authorize(client_id : String, client_secret : String) : self
+    auth_url = "https://accounts.spotify.com/api/token"
+
+    headers = HTTP::Headers{
+      "Authorization" => "Basic " +
+                         Base64.strict_encode "#{client_id}:#{client_secret}",
+    }
+
+    payload = "grant_type=client_credentials"
+
+    response = HTTP::Client.post(auth_url, headers: headers, form: payload)
+    if response.status_code != 200
+      @authorized = false
+      return self
+    end
+
+    access_token = JSON.parse(response.body)["access_token"]
+
+    @access_header = HTTP::Headers{
+      "Authorization" => "Bearer #{access_token}",
+    }
+
+    @authorized = true
+
+    return self
+  end
+
+  # Check if the class is authorized or not
+  def authorized? : Bool
+    return @authorized
+  end
+
+  # Searches spotify with the specified parameters for the specified items
+  #
+  # ```
+  # spotify_searcher.find_item("track", {
+  #   "artist" => "Queen",
+  #   "track" => "Bohemian Rhapsody"
+  # })
+  # => {track metadata}
+  # ```
+  def find_item(item_type : String, item_parameters : Hash, offset = 0,
+                limit = 20) : JSON::Any?
+    query = generate_query(item_type, item_parameters)
+
+    url = "search?q=#{query}&type=#{item_type}&limit=#{limit}&offset=#{offset}"
+    url = @root_url.join(url).to_s
+
+    response = HTTP::Client.get(url, headers: @access_header)
+    error_check(response)
+
+    items = JSON.parse(response.body)[item_type + "s"]["items"].as_a
+
+    points = rank_items(items, item_parameters)
+
+    to_return = nil
+
+    begin
+      # this means no points were assigned so don't return the "best guess"
+      if points[0][0] <= 0
+        to_return = nil
+      else
+        to_return = get_item(item_type, items[points[0][1]]["id"].to_s)
+      end
+    rescue IndexError
+      to_return = nil
+    end
+
+    # if this triggers, it means that a playlist has failed to be found, so
+    # the search will be bootstrapped into find_user_playlist
+    if to_return == nil && item_type == "playlist"
+      return find_user_playlist(
+        item_parameters["username"],
+        item_parameters["name"]
+      )
+    end
+
+    return to_return
+  end
+
+  # Grabs a users playlists and searches through it for the specified playlist
+  #
+  # ```
+  # spotify_searcher.find_user_playlist("prakkillian", "the little man")
+  # => {playlist metadata}
+  # ```
+  def find_user_playlist(username : String, name : String, offset = 0,
+                         limit = 20) : JSON::Any?
+    url = "users/#{username}/playlists?limit=#{limit}&offset=#{offset}"
+    url = @root_url.join(url).to_s
+
+    response = HTTP::Client.get(url, headers: @access_header)
+    error_check(response)
+    body = JSON.parse(response.body)
+
+    items = body["items"]
+    points = [] of Array(Int32)
+
+    items.as_a.each_index do |i|
+      points.push([points_compare(items[i]["name"].to_s, name), i])
+    end
+    points.sort! { |a, b| b[0] <=> a[0] }
+
+    begin
+      if points[0][0] < 3
+        return find_user_playlist(username, name, offset + limit, limit)
+      else
+        return get_item("playlist", items[points[0][1]]["id"].to_s)
+      end
+    rescue IndexError
+      return nil
+    end
+  end
+
+  # Get the complete metadata of an item based off of its id
+  #
+  # ```
+  # SpotifySearcher.new.authorize(...).get_item("artist", "1dfeR4HaWDbWqFHLkxsg1d")
+  # ```
+  def get_item(item_type : String, id : String, offset = 0,
+               limit = 100) : JSON::Any
+    if item_type == "playlist"
+      return get_playlist(id, offset, limit)
+    end
+
+    url = "#{item_type}s/#{id}?limit=#{limit}&offset=#{offset}"
+    url = @root_url.join(url).to_s
+
+    response = HTTP::Client.get(url, headers: @access_header)
+    error_check(response)
+
+    body = JSON.parse(response.body)
+
+    return body
+  end
+
+  # The only way this method differs from `get_item` is that it makes sure to
+  # insert ALL tracks from the playlist into the `JSON::Any`
+  #
+  # ```
+  # SpotifySearcher.new.authorize(...).get_playlist("122Fc9gVuSZoksEjKEx7L0")
+  # ```
+  def get_playlist(id, offset = 0, limit = 100) : JSON::Any
+    url = "playlists/#{id}?limit=#{limit}&offset=#{offset}"
+    url = @root_url.join(url).to_s
+
+    response = HTTP::Client.get(url, headers: @access_header)
+    error_check(response)
+    body = JSON.parse(response.body)
+    parent = PlaylistExtensionMapper.from_json(response.body)
+
+    more_tracks = body["tracks"]["total"].as_i > offset + limit
+    if more_tracks
+      return playlist_extension(parent, id, offset = offset + limit)
+    end
+
+    return body
+  end
+
+  # This method exists to loop through spotify API requests and combine all
+  # tracks that may not be captured by the limit of 100.
+  private def playlist_extension(parent : PlaylistExtensionMapper,
+                                 id : String, offset = 0, limit = 100) : JSON::Any
+    url = "playlists/#{id}/tracks?limit=#{limit}&offset=#{offset}"
+    url = @root_url.join(url).to_s
+
+    response = HTTP::Client.get(url, headers: @access_header)
+    error_check(response)
+    body = JSON.parse(response.body)
+    new_tracks = PlaylistTracksMapper.from_json(response.body)
+
+    new_tracks.items.each do |track|
+      parent.tracks.items.push(track)
+    end
+
+    more_tracks = body["total"].as_i > offset + limit
+    if more_tracks
+      return playlist_extension(parent, id, offset = offset + limit)
+    end
+
+    return JSON.parse(parent.to_json)
+  end
+
+  # Find the genre of an artist based off of their id
+  #
+  # ```
+  # SpotifySearcher.new.authorize(...).find_genre("1dfeR4HaWDbWqFHLkxsg1d")
+  # ```
+  def find_genre(id : String) : String | Nil
+    genre = get_item("artist", id)["genres"]
+
+    if genre.as_a.empty?
+      return nil
+    end
+
+    genre = genre[0].to_s
+    genre = genre.split(" ").map { |x| x.capitalize }.join(" ")
+
+    return genre
+  end
+
+  # Checks for errors in HTTP requests and raises one if found
+  private def error_check(response : HTTP::Client::Response) : Nil
+    if response.status_code != 200
+      raise("There was an error with your request.\n" +
+            "Status code: #{response.status_code}\n" +
+            "Response: \n#{response.body}")
+    end
+  end
+
+  # Generates url to run a GET request against to the Spotify open API
+  # Returns a `String.`
+  private def generate_query(item_type : String, item_parameters : Hash) : String
+    query = ""
+
+    # parameter keys to exclude in the api request. These values will be put
+    # in, just not their keys.
+    query_exclude = ["username"]
+
+    item_parameters.keys.each do |k|
+      # This will map album and track names from the name key to the query
+      if k == "name"
+        # will remove the "name:<title>" param from the query
+        if item_type == "playlist"
+          query += item_parameters[k] + "+"
+        else
+          query += as_field(item_type, item_parameters[k])
+        end
+
+        # check if the key is to be excluded
+      elsif query_exclude.includes?(k)
+        next
+
+        # if it's none of the above, treat it normally
+        # NOTE: playlist names will be inserted into the query normally, without
+        # a parameter.
+      else
+        query += as_field(k, item_parameters[k])
+      end
+    end
+
+    return URI.encode(query.rchop("+"))
+  end
+
+  # Returns a `String` encoded for the spotify api
+  #
+  # ```
+  # query_encode("album", "A Night At The Opera")
+  # => "album:A Night At The Opera+"
+  # ```
+  private def as_field(key, value) : String
+    return "#{key}:#{value}+"
+  end
+
+  # Ranks the given items based off of the info from parameters.
+  # Meant to find the item that the user desires.
+  # Returns an `Array` of `Array(Int32)` or [[3, 1], [...], ...]
+  private def rank_items(items : Array,
+                         parameters : Hash) : Array(Array(Int32))
+    points = [] of Array(Int32)
+    index = 0
+
+    items.each do |item|
+      pts = 0
+
+      # Think about whether this following logic is worth having in one method.
+      # Is it nice to have a single method that handles it all or having a few
+      # methods for each of the item types? (track, album, playlist)
+      parameters.keys.each do |k|
+        val = parameters[k]
+
+        # The key to compare to for artist
+        if k == "artist"
+          pts += points_compare(item["artists"][0]["name"].to_s, val)
+        end
+
+        # The key to compare to for playlists
+        if k == "username"
+          pts_to_add = points_compare(item["owner"]["display_name"].to_s, val)
+          pts += pts_to_add
+          pts += -10 if pts_to_add == 0
+        end
+
+        # The key regardless of whether item is track, album,or playlist
+        if k == "name"
+          pts += points_compare(item["name"].to_s, val)
+        end
+      end
+
+      points.push([pts, index])
+      index += 1
+    end
+
+    points.sort! { |a, b| b[0] <=> a[0] }
+
+    return points
+  end
+
+  # Returns an `Int` based off the number of points worth assigning to the
+  # matchiness of the string. First the strings are downcased and then all
+  # nonalphanumeric characters are stripped.
+  # If the strings are the exact same, return 3 pts.
+  # If *item1* includes *item2*, return 1 pt.
+  # Else, return 0 pts.
+  private def points_compare(item1 : String, item2 : String) : Int32
+    item1 = item1.downcase.gsub(/[^a-z0-9]/, "")
+    item2 = item2.downcase.gsub(/[^a-z0-9]/, "")
+
+    if item1 == item2
+      return 3
+    elsif item1.includes?(item2)
+      return 1
+    else
+      return 0
+    end
+  end
+
+end
+
+# puts SpotifySearcher.new()
+#   .authorize("XXXXXXXXXXXXXXX",
+#              "XXXXXXXXXXXXXXX")
+#   .find_item("playlist", {
+#     "name" => "Brain Food",
+#     "username" => "spotify"
+#     # "name " => "A Night At The Opera",
+#     # "artist" => "Queen"
+#     # "track" => "Bohemian Rhapsody",
+#     # "artist" => "Queen"
+#   })

src/search/youtube.cr

@@ -0,0 +1,200 @@
+require "http"
+require "xml"
+require "json"
+require "uri"
+
+require "./ranking"
+
+require "../bottle/config"
+require "../bottle/styles"
+
+
+module Youtube
+  extend self
+
+  VALID_LINK_CLASSES = [
+    "yt-simple-endpoint style-scope ytd-video-renderer",
+    "yt-uix-tile-link yt-ui-ellipsis yt-ui-ellipsis-2 yt-uix-sessionlink      spf-link ",
+  ]
+
+  # Note that VID_VALUE_CLASS, VID_METADATA_CLASS, and YT_METADATA_CLASS are found in ranking.cr
+
+  # Finds a youtube url based off of the given information.
+  # The query to youtube is constructed like this:
+  #   "<song_name> <artist_name> <search terms>"
+  # If *download_first* is provided, the first link found will be downloaded.
+  # If *select_link* is provided, a menu of options will be shown for the user to choose their poison
+  #
+  # ```
+  # Youtube.find_url("Bohemian Rhapsody", "Queen")
+  # => "https://www.youtube.com/watch?v=dQw4w9WgXcQ"
+  # ```
+  def find_url(spotify_metadata : JSON::Any,
+               flags = {} of String => String) : String?
+
+    search_terms = Config.search_terms
+
+    select_link = flags["select"]?
+
+    song_name = spotify_metadata["name"].as_s
+    artist_name = spotify_metadata["artists"][0]["name"].as_s
+
+    human_query = "#{song_name} #{artist_name} #{search_terms.strip}"
+    params = HTTP::Params.encode({"search_query" => human_query})
+
+    response = HTTP::Client.get("https://www.youtube.com/results?#{params}")
+
+    yt_metadata = get_yt_search_metadata(response.body)
+
+    if yt_metadata.size == 0
+      puts "There were no results for this query on youtube: \"#{human_query}\""
+      return nil
+    end
+
+    root = "https://youtube.com"
+    ranked = Ranker.rank_videos(spotify_metadata, yt_metadata, human_query)
+
+    if select_link
+      return root + select_link_menu(spotify_metadata, yt_metadata)
+    end
+
+    begin
+      puts Style.dim("  Video: ") + yt_metadata[ranked[0]["index"]]["title"]
+      return root + yt_metadata[ranked[0]["index"]]["href"]
+    rescue IndexError
+      return nil
+    end
+
+    exit 1
+  end
+
+  # Presents a menu with song info for the user to choose which url they want to download
+  private def select_link_menu(spotify_metadata : JSON::Any,
+                               yt_metadata : YT_METADATA_CLASS) : String
+    puts Style.dim("  Spotify info: ") +
+         Style.bold("\"" + spotify_metadata["name"].to_s) + "\" by \"" +
+         Style.bold(spotify_metadata["artists"][0]["name"].to_s + "\"") +
+         " @ " + Style.blue((spotify_metadata["duration_ms"].as_i / 1000).to_i.to_s) + "s"
+    puts "  Choose video to download:"
+    index = 1
+    yt_metadata.each do |vid|
+      print "    " + Style.bold(index.to_s + " ")
+      puts "\"" + vid["title"] + "\" @ " + Style.blue((vid["duration_ms"].to_i / 1000).to_i.to_s) + "s"
+      index += 1
+      if index > 5
+        break
+      end
+    end
+
+    input = 0
+    while true # not between 1 and 5
+      begin
+        print Style.bold("  > ")
+        input = gets.not_nil!.chomp.to_i
+        if input < 6 && input > 0
+          break
+        end
+      rescue
+        puts Style.red("  Invalid input, try again.")
+      end
+    end
+
+    return yt_metadata[input-1]["href"]
+
+  end
+
+  # Finds valid video links from a `HTTP::Client.get` request
+  # Returns an `Array` of `NODES_CLASS` containing additional metadata from Youtube
+  private def get_yt_search_metadata(response_body : String) : YT_METADATA_CLASS
+    yt_initial_data : JSON::Any = JSON.parse("{}")
+
+    response_body.each_line do |line|
+      # timestamp 11/8/2020:
+      # youtube's html page has a line previous to this literally with 'scraper_data_begin' as a comment
+      if line.includes?("var ytInitialData")
+        # Extract JSON data from line
+        data = line.split(" = ")[2].delete(';')
+        dataEnd = (data.index("</script>") || 0) - 1
+
+        begin
+          yt_initial_data = JSON.parse(data[0..dataEnd])
+        rescue
+          break
+        end
+      end
+    end
+
+    if yt_initial_data == JSON.parse("{}")
+      puts "Youtube has changed the way it organizes its webpage, submit a bug"
+      puts "saying it has done so on https://github.com/cooperhammond/irs"
+      exit(1)
+    end
+
+    # where the vid metadata lives
+    yt_initial_data = yt_initial_data["contents"]["twoColumnSearchResultsRenderer"]["primaryContents"]["sectionListRenderer"]["contents"]
+
+    video_metadata = [] of VID_METADATA_CLASS
+
+    i = 0
+    while true
+      begin
+        # video title
+        raw_metadata = yt_initial_data[0]["itemSectionRenderer"]["contents"][i]["videoRenderer"]
+
+        metadata = {} of String => VID_VALUE_CLASS
+
+        metadata["title"] = raw_metadata["title"]["runs"][0]["text"].as_s
+        metadata["href"] = raw_metadata["navigationEndpoint"]["commandMetadata"]["webCommandMetadata"]["url"].as_s
+        timestamp = raw_metadata["lengthText"]["simpleText"].as_s
+        metadata["timestamp"] = timestamp
+        metadata["duration_ms"] = ((timestamp.split(":")[0].to_i * 60 +
+                               timestamp.split(":")[1].to_i) * 1000).to_s
+
+
+        video_metadata.push(metadata)
+      rescue IndexError
+        break
+      rescue Exception
+      end
+      i += 1
+    end
+
+    return video_metadata
+  end
+
+  # Returns as a valid URL if possible
+  #
+  # ```
+  # Youtube.validate_url("https://www.youtube.com/watch?v=NOTANACTUALVIDEOID")
+  # => nil
+  # ```
+  def validate_url(url : String) : String | Nil
+    uri = URI.parse url
+    return nil if !uri
+
+    query = uri.query
+    return nil if !query
+
+    # find the video ID
+    vID = nil
+    query.split('&').each do |q|
+      if q.starts_with?("v=")
+        vID = q[2..-1]
+      end
+    end
+    return nil if !vID
+
+    url = "https://www.youtube.com/watch?v=#{vID}"
+
+    # this is an internal endpoint to validate the video ID
+    params = HTTP::Params.encode({"format" => "json", "url" => url})
+    response = HTTP::Client.get "https://www.youtube.com/oembed?#{params}"
+    return nil unless response.success?
+
+    res_json = JSON.parse(response.body)
+    title = res_json["title"].as_s
+    puts Style.dim("  Video: ") + title
+
+    return url
+  end
+end