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Merge pull request #60 from cooperhammond/crystal-port

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Crystal port
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Cooper Hammond 2020-05-21 19:45:09 -07:00 committed by GitHub
parent c3dc25c23e dd23fb5527
commit e23033d269
41 changed files with 1762 additions and 1624 deletions
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root = true
[*.cr]
charset = utf-8
end_of_line = lf
insert_final_newline = true
indent_style = space
indent_size = 2
trim_trailing_whitespace = true

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# General stuff to ignore.
*.pyc
/dist/
/*.egg-info/
/build/
__pycache__/
.eggs
/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
# Temporarily downloaded files
*.mp3
*.zip
*.part
*.webm
# Coverage files
.coverage
# Temporarily built binaries
ffmpeg binaries/
# vscode work space
.vscode/
*.webm*
.ripper.log
ffmpeg
ffprobe
youtube-dl

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

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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.

222
README.md Normal file → Executable file
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@ -1,85 +1,177 @@
# Ironic Redistribution System
# irs: The Ironic Repositioning System
[![License: GNU](https://img.shields.io/badge/license-gnu-yellow.svg?style=flat-square)](http://www.gnu.org/licenses/gpl.html)
[![Stars](https://img.shields.io/github/stars/kepoorhampond/irs.svg?style=flat-square)](https://github.com/kepoorhampond/irs/stargazers)
[![Say Thanks](https://img.shields.io/badge/say-thanks-ff69b4.svg?style=flat-square)](https://saythanks.io/to/kepoorhampond)
[![PyPI](https://img.shields.io/badge/pypi-irs-blue.svg?style=flat-square)](https://pypi.python.org/pypi/irs)
[![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)
> A music downloader that understands your metadata needs.
> A music scraper that understands your metadata needs.
A tool to download your music with metadata. It uses [Spotify](https://www.spotify.com/) for finding metadata and [Youtube](https://www.youtube.com/) for the actual audio source. You will need to have some Spotify tokens, the instructions to set them up are [here](https://github.com/kepoorhampond/irs#spotify-tokens).
`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.
Works with Python 2 and 3.
<p align="center">
<img src="https://i.imgur.com/7QTM6rD.png" height="400" title="#1F816D" />
</p>
<p align="center"
[![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>
---
## Table of Contents
- [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)
## Usage
## Install and Setup
```
$ sudo pip install irs
$ irs --setup
~ $ 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
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
```
**You will need to have some Spotify tokens, the instructions to set them up are [here](https://github.com/kepoorhampond/irs#spotify-tokens).**
### Demo
[![asciicast](https://asciinema.org/a/332793.svg)](https://asciinema.org/a/332793)
## Demo and Usages
## Installation
The usages can be found with the `-h` or `--help` flag:
### Pre-built
Just download the latest release for your platform
[here](https://github.com/cooperhammond/irs/releases).
### 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
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
client_key: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
client_secret: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
single_folder_playlist:
enabled: true
retain_playlist_order: true
unify_into_album: false
```
usage: irs [-h] [-S] [-a ARTIST] [-s SONG] [-A ALBUM] [-p PLAYLIST]
[-u USERNAME] [-o ORGANIZATION]
- `binary_directory`: a path specifying where the downloaded binaries should
be placed
- `music_directory`: a path specifying where downloaded mp3s should be placed.
Note that there will be more structure created inside that folder, usually
in the format of `music-dir>artist-name>album-name>track`
- `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
optional arguments:
-h, --help show this help message and exit
-S, --setup Run this by itself to setup config files and folder
for irs and download the ffmpeg binaries
-a ARTIST, --artist ARTIST
Specify artist name. Must be used with -s/--song or
-A/--album
-s SONG, --song SONG Specify song name. Must be used with -a/--artist
-A ALBUM, --album ALBUM
Specify album name. Can be used by itself.
-p PLAYLIST, --playlist PLAYLIST
Specify playlist name. Must be used with -A/--album
-u USERNAME, --username USERNAME
Specify user name for playlist. Must be used with
-A/--album
-o ORGANIZATION, --organization ORGANIZATION
Specify type of organization for list. Used when
downloading spotify playlist/album
```
## How it works
So all of these are valid commands:
```
$ irs -a "Brandon Flowers" -s "Lonely Town"
$ irs -u "spotify" -p "Brain Food"
$ irs -A "Suicide Squad: The Album"
```
But these are not:
```
$ irs -s "Bohemian Rhapsody"
$ irs -p "Best Nirvana"
```
**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.
## Spotify Tokens
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.
To download metadata through spotify, you'll want to head to their Dev Apps page, [here](https://developer.spotify.com/my-applications/). After doing that you'll want to create a new app. Name it whatever you want and then once you've done that, find the `Client ID` and `Client Secret` keys. You'll want to take those keys and paste them into your system's environment variables as `SPOTIFY_CLIENT_ID` and `SPOTIFY_CLIENT_SECRET`, correspondingly. Voilà! You can now download metadata with IRS!
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)
## Metadata
Currently, the program attaches the following metadata to the downloaded files:
- Title
- Artist
- Album
- Album Art
- Genre
- Track Number
- Disc Number
## Contributing
## Wishlist
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.
- [x] Full album downloading
- [x] Album art metadata correctly displayed
- [x] Spotify playlist downloading
- [ ] Comment metadata
- [ ] Compilation metadata
- [ ] GUI/Console interactive version - *in progress*
- [ ] Lyric metadata
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

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irs/__init__.py
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irs/cli/__init__.py
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irs/cli/cli.py
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@ -1,51 +0,0 @@
import argparse
from ..glue.song import Song
from ..glue.album import Album
from ..glue.playlist import Playlist
from ..install.setup import set_it_up
from .config_parser import parse_config
def main():
"""The main cli method. Parses arguments from the command line."""
parser = argparse.ArgumentParser()
parser.add_argument("-S", "--setup", dest="setup", action='store_true',
help="Run this by itself to setup config files "
"and folder for irs and download the ffmpeg binaries")
parser.add_argument("-a", "--artist", dest="artist",
help="Specify artist name. Must be used with -s/--song or -A/--album")
parser.add_argument("-s", "--song", dest="song",
help="Specify song name. Must be used with -a/--artist")
parser.add_argument("-A", "--album", dest="album",
help="Specify album name. Can be used by itself.")
parser.add_argument("-p", "--playlist", dest="playlist",
help="Specify playlist name. Must be used with -A/--album")
parser.add_argument("-u", "--username", dest="username",
help="Specify user name for playlist. Must be used with -A/--album")
parser.add_argument("-o", "--organization", dest="organization",
default="single-folder", help="Specify type of organization for list."
" Used when downloading spotify playlist/album")
args = parser.parse_args()
if args.setup:
set_it_up()
parse_config()
if args.song and args.artist: # single song
Song(args.song, args.artist).grab_it()
elif args.album and args.artist: # album with an artist
Album(args.album, args.artist).grab_it()
elif args.album: # album without artist
Album(args.album).grab_it()
elif args.playlist and args.username: # playlist
Playlist(args.playlist, args.username, args.organization).grab_it()

52
irs/cli/config_parser.py
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@ -1,52 +0,0 @@
import os
import sys
import yaml
def parse_config():
"""Parses config using environment variables."""
home = os.environ.get("HOME") or os.path.expanduser("~/")
check_for_and_set("irs_config_dir", home + "/.irs", ".irs/")
check_for = [home + "/.irs/config.yml", home + "/.irs/bin/ffmpeg",
home + "/.irs/bin/ffprobe"]
for path in check_for:
if not os.path.exists(path):
print("There's no config set up. Set up a configuration folder by "
"running `irs --setup`")
sys.exit(1)
config = {}
with open(os.environ["irs_config_dir"] + "/config.yml", "r") as stream:
try:
config = yaml.safe_load(stream)
except yaml.YAMLError as exc:
print(exc)
check_for_and_set("SPOTIFY_CLIENT_ID", config.get(
"SPOTIFY_KEYS").get("CLIENT_ID"), None)
check_for_and_set("SPOTIFY_CLIENT_SECRET", config.get(
"SPOTIFY_KEYS").get("CLIENT_SECRET"), None)
check_for_and_set("irs_music_dir", os.path.expanduser(config.get("music_directory")),
home + "/Music")
check_for_and_set("irs_ffmpeg_dir", os.environ["irs_config_dir"] + "/bin", None)
def check_for_and_set(key, val, else_):
"""Checks for an environment variable and if it doesn't exist, then set it
equal to the val given.
:param key: string, key to check for existence
:param val: value to replace key value with if it doesn't exists
:param else_: if val doesn't exist, use else_ instead
"""
if not os.environ.get(key):
if key:
os.environ[key] = val
else:
os.environ[key] = else_

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irs/glue/__init__.py
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irs/glue/album.py
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@ -1,14 +0,0 @@
from .list import SpotifyList
class Album(SpotifyList):
"""A class for downloading albums as a whole."""
def _SpotifyList__find_it(self):
album = self.spotify_searcher.find_album(
self.list_title,
self.list_author
)
return album
def _SpotifyList__set_organization(self, song_index, song):
pass

51
irs/glue/list.py
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@ -1,51 +0,0 @@
import sys
import abc
from ..search import spotify
from .song import Song
class SpotifyList(object):
"""A parent class for downloading spotify albums and playlists"""
def __init__(self, list_title, list_author=None):
self.spotify_searcher = spotify.SpotifySearcher().authorize()
self.list_title = list_title
self.list_author = list_author
self.file_names = []
def grab_it(self):
"""Downloads the songs!
"""
spotify_list = self.__find_it()
list_contents = spotify_list["tracks"]["items"]
for index, s in enumerate(list_contents):
# if it's a playlist, get the actual track, not the metadata of
# the playlist
if s.get("track"):
s = s["track"]
song = Song(s["name"], s["artists"][0]["name"])
song.provide_spotify(self.spotify_searcher)
song.provide_metadata(self.spotify_searcher.song(s["uri"]))
song.get_relevant_tags()
self.__set_organization(index, song)
song.grab_it()
# These following functions are named weird b/c PEP8 and python are in
# conflict. An error gets raised when private methods
# (prefix = __ due to PEP8) are overriden by child class with the same
# name b/c python is dumb with how it concatenates class names and method
# names with underscores
def __find_it(self):
"""Finds the list and return it"""
raise NotImplementedError("Must override __find_it with"
"_SpotifyList__find_it")
def __set_organization(self, song_index, song):
"""Post processing method for a single song
:param song: Song class
"""
raise NotImplementedError("Must override __post_process with"
"_SpotifyList__set_organization")

39
irs/glue/playlist.py
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@ -1,39 +0,0 @@
import os
from .list import SpotifyList
class Playlist(SpotifyList):
"""A class for downloading albums as a whole.
The majority of specs for methods can be found in the SpotifyList file"""
def __init__(self, playlist_name, username, organization="single-folder"):
"""
:param playlist_name: a string, the name of the playlist
:param username: a string, the username of the creator of the playlist
:param organization: a string, following options:
"single-folder": All of the songs downloaded will be put into a
single folder. root-music-dir>playlist-name
"standard": All of the songs downloaded will be
organized by root-music-dir>artist>album
"""
super(Playlist, self).__init__(playlist_name, username)
self.organization = organization
def _SpotifyList__find_it(self):
playlist = self.spotify_searcher.find_playlist(
self.list_title,
self.list_author
)
return playlist
def _SpotifyList__set_organization(self, song_index, song):
if self.organization == "standard":
song.set_standard_organization()
elif self.organization == "single-folder":
# reindex the file names in order to keep them in alphabetical order
song.provide_new_file_name("{} - {}.mp3".format(
song_index + 1, song.tags["title"]
))
song.provide_new_location(os.path.join(
os.getcwd(), self.list_title
))

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irs/glue/song.py
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@ -1,193 +0,0 @@
import os
import sys
import errno
import string
from ..search import spotify, youtube
from ..interact import ripper, tagger
class Song(object):
"""A grabber for a single song. Unless provided, gets metadata, finds url,
downloads, converts, tags, and moves it."""
def __init__(self, song_title, artist_name):
self.song_title = song_title
self.artist_name = artist_name
self.spotify_searcher = None
self.spotify_authenticated = False
self.metadata = None
self.tags = {}
self.parsed_tags = False
self.file_name = song_title + ".mp3"
self.end_file_name = None
self.current_location = os.getcwd()
self.end_location = None
def grab_it(self, post_process=True):
"""The main method to call for this class. Unless provided, grabs
metadata, finds the url, downloads the video, converts it, and
tags it.
:param post_process: boolean,
:rtype: a string, the file_name
"""
self.metadata = self.__parse_data()
self.tags = self.get_relevant_tags()
print("'{}' by {}:".format(self.tags["title"], self.tags["artist"]))
print("Searching youtube ...")
song_url = youtube.find_url(self.tags["title"], self.tags["artist"])
if self.metadata:
self.file_name = '{} - {}.mp3'.format(
self.tags["tracknumber"],
self.tags["title"]
)
print("Downloading ...")
ripper.rip_from_url(song_url, self.file_name)
print("Converting to mp3 ...") # TODO: add this into a hook for ydl
print("Tagging ...")
song_tags = tagger.Tagger(self.file_name)
for tag in self.tags:
if tag is "albumart":
song_tags.add_album_art(self.tags[tag])
else:
song_tags.add_tag(tag, self.tags[tag])
if post_process:
self.__organize()
def provide_spotify(self, spotify_searcher):
"""This function will set this class's spotify searcher to the one
provided to prevent the need to authenticate twice
:param spotify_searcher: an instance of
irs.searcher.spotify.SpotifySearcher, the spotify searcher to use
:rtype: self class
"""
self.spotify_searcher = spotify_searcher
self.spotify_authenticated = True
return self
def provide_metadata(self, metadata):
"""Provides metadata for the song so searches don't have to be
performed twice. If this is called with new metadata,
other metadata won't be searched.
:param metadata: a dict, the new metadata from a spotipy track search
:rtype: self class
"""
self.metadata = metadata
return self
def provide_tag(self, key, value):
"""Provides tags for the song. Tags will still be parsed, but will not
overwrite these provided tags.
:param: a dict, the tags that will overwrite the metadata provided tags
:rtype: self class
"""
self.tags[key] = value
return self
def provide_new_location(self, new_loc):
"""Provides a new, non-default location for the song.
:param new_loc: a string, the path of the new location WITHOUT filename
:rtype: self class
"""
self.end_location = new_loc
return self
def provide_new_file_name(self, new_name):
"""Provides a new file name for the song file. DOESNT append .mp3
:param new_name: string
:rtype: self class
"""
self.end_file_name = new_name
return self
def set_standard_organization(self):
"""Sets standard organization for the file, which is
root-music-dir>artist-folder>album-folder>song
"""
if not self.parsed_tags:
self.tags = self.get_relevant_tags()
self.end_location = os.path.join(
os.environ.get("irs_music_dir"), self.tags["artist"],
self.tags["album"]
)
self.end_file_name = "{} - {}.mp3".format(
self.tags["tracknumber"], self.tags["title"]
)
def get_relevant_tags(self):
"""Sorts relevant info from the spotipy metadata. Merges with any
provided tags from provide_tags method.
:rtype: a dict, parsed tags
"""
# TODO: come up with fallback solution if there's no metadata found
# follows this pattern:
# if this does not exist:
# set the thing that doesn't exist to a
# specific value from the metadata dict
tags = self.tags
metadata = self.metadata
if not tags.get("title"):
tags["title"] = metadata["name"]
if not tags.get("artist"):
tags["artist"] = metadata["artists"][0]["name"]
if not tags.get("album"):
tags["album"] = metadata["album"]["name"]
if not tags.get("tracknumber"):
tags["tracknumber"] = str(metadata["track_number"])
if not tags.get("albumart"):
tags["albumart"] = metadata["album"]["images"][0]["url"]
if not tags.get("genre") and self.spotify_searcher:
tags["genre"] = string.capwords(self.spotify_searcher.artist(
metadata["artists"][0]["uri"])["genres"][0])
self.tags = tags
return self.tags
def __organize(self):
"""Based off of self.current_location, self.end_location, and self.
file_name, this function creates folders for the end location and moves
the file there.
"""
if not self.end_location:
self.set_standard_organization()
if not os.path.exists(self.end_location):
# try loop to prevent against race conditions with os.path.exists
# and os.makedirs
try:
os.makedirs(self.end_location)
except OSError as exc:
if exc.errno != errno.EEXIST:
raise
os.rename(
self.current_location + "/" + self.file_name,
self.end_location + "/" + self.end_file_name,
)
def __parse_data(self):
"""If a spotify searcher has not been provided, create one."""
if not self.spotify_authenticated and not self.metadata:
self.spotify_searcher = spotify.SpotifySearcher().authorize()
self.spotify_authenticated = True
"""If metadata has not been provided, search for it."""
if not self.metadata:
self.metadata = self.spotify_searcher.find_song(
self.song_title, self.artist_name
)
return self.metadata

0
irs/interact/__init__.py
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50
irs/interact/ripper.py
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@ -1,50 +0,0 @@
import os
import sys
import glob
import shutil
import youtube_dl
def rip_from_url(video_url, output_name):
"""This method downloads a video, converts it to an MP3 and renames it
:param video_url: a string, youtube url of the video you want to download
:param output_name: a string, the name of the output file
"""
ydl_opts = {
'format': 'bestaudio/best',
'postprocessors': [{
'key': 'FFmpegExtractAudio',
'preferredcodec': 'mp3',
'preferredquality': '192',
}],
'logger': _DownloadLogger(),
'progress_hooks': [_download_hook],
'output': "tmp_file",
'prefer-ffmpeg': True,
'ffmpeg_location': os.environ["irs_ffmpeg_dir"],
}
with youtube_dl.YoutubeDL(ydl_opts) as ydl:
ydl.download([video_url])
for f in glob.glob("./*%s*" % video_url.split("/watch?v=")[-1]):
shutil.move(f, output_name)
class _DownloadLogger(object):
def debug(self, msg):
pass
def warning(self, msg):
pass
def error(self, msg):
print(msg)
# TODO: update the download log
def _download_hook(d):
if d['status'] == 'finished':
print("Done!")

67
irs/interact/tagger.py
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import sys
if sys.version_info[0] >= 3:
from urllib.request import urlopen
elif sys.version_info[0] < 3:
from urllib import quote_plus, quote
from urllib import urlopen
from mutagen.mp3 import EasyMP3
from mutagen.easyid3 import EasyID3, EasyID3KeyError
from mutagen.id3 import APIC, ID3
class Tagger(object):
"""Attaches ID3 tags to MP3 files."""
def __init__(self, location):
"""Initializes the class and generates ID3 tags for the mp3
:param location: a string, the location of the mp3 that you want ID3
tags on
"""
EasyID3.RegisterTextKey("comment", "COMM")
self.location = location
self.mp3 = EasyID3(self.location)
def add_tag(self, tag, data):
"""Adds a tag to the mp3 file you specified in __init__ and saves it
:param tag: a string, the name of the tag you want to add to the mp3
valid tag names:
"title", "artist", "album", "genre", "tracknumber" (string),
"discnumber" (string),
"compilation" ("1" for true, "" for false)
:param data: a string, the data that you want to attach to the mp3
under the specified tag name
"""
# For valid tags: `EasyID3.valid_keys.keys()`
self.mp3[tag] = data
self.mp3.save()
def read_tag(self, tag):
"""Tries to read a tag from the initialized mp3 file
:param tag: a string, the name of the tag you want to read
:rtype: an array with a string inside. The string inside the array is
the data you're requesting. If there's no tag associated or no data
attached with your requested tag, a blank array will be returned.
"""
try:
return self.mp3[tag]
except EasyID3KeyError or KeyError:
return []
def add_album_art(self, image_url):
"""Adds album art to the initialized mp3 file
:param image_url: a string, the url of the image you want to attach to
the mp3
"""
mp3 = EasyMP3(self.location, ID3=ID3)
mp3.tags.add(
APIC(
encoding = 3,
mime = 'image/png',
type = 3,
desc = 'cover',
data = urlopen(image_url).read()
)
)
mp3.save()

0
irs/search/__init__.py
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119
irs/search/spotify.py
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import os
import sys
import re
import spotipy
from spotipy.oauth2 import SpotifyClientCredentials
class SpotifySearcher(object):
"""Searches spotify for song, album, and playlist metadata."""
def authorize(self, client_id=None, client_secret=None):
"""Authorizes this class with spotify using client ids
:rtype: returns self class
"""
# TODO: remove these when you finish config files
if not client_id:
client_id = os.environ["SPOTIFY_CLIENT_ID"]
if not client_secret:
client_secret = os.environ["SPOTIFY_CLIENT_SECRET"]
try:
creds = SpotifyClientCredentials(client_id, client_secret)
self.authorized = True
self.spotify = spotipy.Spotify(client_credentials_manager=creds)
except Exception:
self.authorized = False
self.spotify = spotipy.Spotify()
return self
def find_song(self, song_title, artist_name, limit=50, offset=0):
"""Searches spotify for a song and grabs its metadata
:param song_title: a string, the title of the song you're looking for
:param artist_name: a string, the artist of the above song
:rtype: a dictionary of metadata about the song
"""
songs = self.spotify.search(q=song_title, type="track")["tracks"]
for song in songs["items"]:
if _simplify(song_title) in _simplify(song["name"]) and \
_simplify(artist_name) in _simplify(song["artists"][0]["name"]):
return song
if songs['next']:
return self.find_song(song_title, artist_name,
offset=offset + limit)
else:
print("There were no songs found by that name with that artist.")
sys.exit(1)
def find_album(self, album_title, artist_name=None, limit=50, offset=0):
"""Searches spotify for an album and grabs its contents and metadata
:param album_title: a string, the title of the album
:param artist_name: a string, the name of the artist of the album
:rtype: a dictionary of metadata about the album
"""
query = album_title
if artist_name:
query += " " + artist_name
albums = self.spotify.search(q=query, type="album")['albums']
for album in albums['items']:
if _simplify(album_title) in _simplify(album["name"]):
return self.spotify.album(album['uri'])
if albums['next']:
return self.find_album(album_title, artist_name,
offset=offset + limit)
else:
print("There were no albums found by that name with that artist.")
sys.exit(1)
def find_playlist(self, playlist_title, username, limit=50, offset=0):
"""Searches spotify for a playlist and grabs its contents and metadata
:param playlist_title: a string, the title of the playlist
:param username: a string, the username of the playlist creator/owner
:rtype: a dictionary of metadata about the playlist
"""
playlists = []
playlists = self.spotify.user_playlists(username, limit, offset)
for playlist in playlists['items']:
if _simplify(playlist_title) in _simplify(playlist['name']):
return self.spotify.user_playlist(username, playlist['id'])
if playlists['next']:
return self.find_playlist(playlist_title, username,
offset=offset + limit)
else:
print("There were no playlists by that name found.")
sys.exit(1)
def artist(self, artist_uri):
"""Gets artist metadata from uri
:param artist_uri: the spotify uri for the artist
:rtype: a dict of info about the artist
"""
return self.spotify.artist(artist_uri)
def song(self, song_uri):
"""Gets song metadata from uri
:param song_uri: the spotify uri for the artist
:rtype: a dict of info about the artist
"""
return self.spotify.track(song_uri)
# TODO: export this function to a utilities file
def _simplify(string):
"""Lowercases and strips all non alphanumeric characters from the string
:param string: a string to be modified
:rtype: the modified string
"""
if type(string) == bytes:
string = string.decode()
return re.sub(r'[^a-zA-Z0-9]+', '', string.lower())

191
irs/search/youtube.py
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import sys
import re
if sys.version_info[0] >= 3:
from urllib.parse import urlencode
from urllib.request import urlopen
elif sys.version_info[0] < 3:
from urllib import urlencode
from urllib import urlopen
else:
print("Must be using Python 2 or 3")
sys.exit(1)
from bs4 import BeautifulSoup
def find_url(song_title, artist_name, search_terms=None, caught_by_google=False, download_first=False):
"""Finds the youtube video url for the requested song. The youtube
query is constructed like this:
"<song> <artist> <search terms>"
so plugging in "Bohemian Rhapsody", "Queen", and "lyrics" would end
up with a search for "Bohemian Rhapsody Queen lyrics" on youtube
:param-required song: song name
:param-required artist: artist name
:param search_terms: any additional search terms you may want to
add to the search query
:param caught_by_google: a boolean, if not false or none, turns on
the captcha catcher
:param download_first: a boolean, if true, downloads first video
that youtube returns
:rtype: A string of the youtube url for the song
"""
query = artist_name + " " + song_title
if search_terms:
query += " " + search_terms
encoded_query = urlencode({"search_query": query})
url = "http://www.youtube.com/results?" + encoded_query
soup = _get_url_data(url, caught_by_google)
# if you want to inspect the html being requested
# print(soup.prettify())
# with open("index.html", "wb") as f:
# f.write(soup.prettify().encode('utf-8'))
# Each of the tags in the results list have the following relevant
# attributes:
# "title": the title of the youtube video
# "href": the youtube video code, namely the X's of
# https://www.youtube.com/watch?v=XXXXXXXXXXX
# "class": the classes of the link, used to identify the youtube title
results = _find_links(soup)
best_guess = None
total_tries_counter = 0
if len(results) <= 0:
raise Exception('There were no search results for "{}"'.format(query))
if download_first == True:
return "https://youtube.com" + results[0]["href"]
scores = []
for index, link in enumerate(results):
scores.append([
index,
_score_song(song_title, artist_name, link["title"]),
link["href"]
])
# sort by the score of the song
sorted(scores, key=lambda x: x[1])
return "https://youtube.com" + results[scores[0][0]]["href"]
def _score_song(song_title, artist_name, video_title):
"""Scores the likelihood of the song audio being in the video based off of
the video title.
:param song_title: a string, the title of the song that you're looking for
:param video_title: a string, the title of the video you're analyzing
:rtype: an integer, the score of the song
"""
points = 0
song_title = _simplify(song_title)
artist_name = _simplify(artist_name)
video_title = _simplify(video_title)
if song_title in video_title:
points += 3
if artist_name in video_title:
points += 3
points -= _count_garbage_phrases(video_title, song_title)
return points
def _simplify(string):
"""Lowercases and strips all non alphanumeric characters from the string
:param string: a string to be modified
:rtype: the modified string
"""
if type(string) == bytes:
string = string.decode()
return re.sub(r'[^a-zA-Z0-9]+', '', string.lower())
def _count_garbage_phrases(video_title, song_title):
"""Checks if there are any phrases in the title of the video that would
indicate it doesn't have the audio we want
:param string: a string, the youtube video title
:param title: a string, the actual title of the song we're looking for
:rtype: an integer, of the number of bad phrases in the song
"""
# Garbage phrases found through experiences of downloading the wrong song
# TODO: add this into the config so the user can mess with it if they want
garbage_phrases = (
"cover album live clean rare version full full album row at "
"@ session how to npr music reimagined hr version"
).split(" ")
bad_phrases = 0
for gphrase in garbage_phrases:
# make sure we're not invalidating part of the title of the song
if gphrase in song_title.lower():
continue
# check if the garbage phrase is not in the video title
if gphrase in video_title.lower():
bad_phrases += 1
return bad_phrases
def _find_links(soup):
"""Finds youtube video links in the html soup
:param soup: a BeautifulSoup(...) element
:rtype: returns a list of valid youtube video links
"""
return list(filter(None, map(_find_link, soup.find_all("a"))))
def _find_link(link):
"""Tests html tags to see if they contain a youtube video link.
Should be used only with the find_links function in a map func.
:param link: accepts an element from BeautifulSoup(...).find_all(...)
:rtype: returns the link if it's an actual video link, otherwise, None
"""
try:
class_to_check = str(" ".join(link["class"]))
except KeyError:
return
# these classes are found by inspecting the html soup of a youtube search.
valid_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 ")
]
try:
# Make sure it's not a playlist
if "&list=" in link["href"]:
return
for valid_class in valid_classes:
if valid_class in class_to_check:
return link
except KeyError:
pass
# TODO: build in the captcha cheater if the user is "caught" by google
def _get_url_data(url, caught_by_google):
"""Gets parsed html from the specified url
:param url: A string, the url to request and parse.
:param caught_by_google: A boolean, will open and use the captcha
cheat to get around google's captcha.
:rtype: A BeautifulSoup class
"""
html_content = urlopen(url).read()
return BeautifulSoup(html_content, 'html.parser')

5
setup.cfg
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@ -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

25
setup.py
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@ -1,25 +0,0 @@
from setuptools import setup
setup(
name = 'irs',
version = '7.0.2',
description = 'A music downloader that gets metadata too.',
url = 'https://github.com/kepoorhampond/irs',
author = 'Kepoor Hampond',
author_email = 'kepoorh@gmail.com',
license = 'GPL',
packages = ['irs', 'irs.search', 'irs.interact', 'irs.glue',
'irs.install', 'irs.cli'],
install_requires = [
'bs4', # HTML parsing
'mutagen', # MP3 tags
'argparse', # CLI arg parsing
'spotipy', # Interfacing w/ Spotify API
'ydl-binaries', # Downloading ffmpeg/ffprobe binaries
'pyyaml', # Config files done simply
'youtube-dl' # Download youtube videos
],
entry_points = {
'console_scripts': ['irs = irs.cli.cli:main'],
},
)

6
shard.lock Executable file
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version: 1.0
shards:
ydl_binaries:
github: cooperhammond/ydl-binaries
commit: c82e3937fee20fd076b1c73e24b2d0205e2cf0da

15
shard.yml Executable file
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@ -0,0 +1,15 @@
name: irs
version: 1.0.0
authors:
- Cooper Hammond <kepoorh@gmail.com>
targets:
irs:
main: src/irs.cr
license: MIT
dependencies:
ydl_binaries:
github: cooperhammond/ydl-binaries

9
spec/irs_spec.cr Executable file
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require "./spec_helper"
describe Irs do
# TODO: Write tests
it "works" do
false.should eq(true)
end
end

2
spec/spec_helper.cr Executable file
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require "spec"
require "../src/irs"

179
src/bottle/cli.cr Executable file
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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"],
]
@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.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
exit
elsif @args["version"]?
version
exit
elsif @args["install"]?
YdlBinaries.get_both(Config.binary_location)
exit
elsif @args["config"]?
puts ENV["IRS_CONFIG_LOCATION"]?
exit
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
s.organize_it(Config.music_directory)
exit
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
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
else
puts Style.red("Those arguments don't do anything when used that way.")
puts "Type `irs -h` to see usage."
exit 1
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

115
src/bottle/config.cr Executable file
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require "yaml"
require "./styles"
require "../search/spotify"
EXAMPLE_CONFIG = <<-EOP
#{Style.dim "exampleconfig.yml"}
#{Style.dim "===="}
#{Style.blue "binary_directory"}: #{Style.green "~/.irs/bin"}
#{Style.blue "music_directory"}: #{Style.green "~/Music"}
#{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 = [
"binary_directory",
"music_directory",
"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 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 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

23
src/bottle/styles.cr Executable file
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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

3
src/bottle/version.cr Executable file
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module IRS
VERSION = "0.1.0"
end

47
src/glue/album.cr Executable file
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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
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(@home_music_directory)
end
end

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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")
]
}
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
if !@spotify_searcher.authorized?
raise("Need to call provide_client_keys on Album or Playlist class.")
end
outputter("searching", 0)
list = find_it()
outputter("searching", 1)
contents = list["tracks"]["items"].as_a
i = 0
contents.each do |datum|
if datum["track"]?
datum = datum["track"]
end
data = organize_song_metadata(list, datum)
song = Song.new(data["name"].to_s, data["artists"][0]["name"].to_s)
song.provide_spotify(@spotify_searcher)
song.provide_metadata(data)
puts Style.bold("[#{data["track_number"]}/#{contents.size}]")
song.grab_it
organize(song)
i += 1
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 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

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require "json"
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
},
type: String,
uri: String
)
end
def parse_to_json(string_json : String) : JSON::Any
return JSON.parse(string_json)
end

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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
@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(" ", " ")
File.rename("./" + song.filename, (path / safe_filename).to_s)
else
song.organize_it(@home_music_directory)
end
end
end

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require "../search/spotify"
require "../search/youtube"
require "../interact/ripper"
require "../interact/tagger"
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")
],
"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.
#
# ```
# Song.new("Bohemian Rhapsody", "Queen").grab_it
# ```
def grab_it
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)
@filename = data["track_number"].to_s + " - #{data["name"].to_s}.mp3"
outputter("url", 0)
url = Youtube.find_url(@song_name, @artist_name, search_terms: "lyrics")
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)
outputter("download", 0)
Ripper.download_mp3(url.as(String), @filename)
outputter("download", 1)
outputter("albumart", 0)
temp_albumart_filename = ".tempalbumart.jpg"
HTTP::Client.get(data["album"]["images"][0]["url"].to_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"].to_s
else
@artist = data["artists"][0]["name"].to_s
end
@album = data["album"]["name"].to_s
tagger = Tags.new(@filename)
tagger.add_album_art(temp_albumart_filename)
tagger.add_text_tag("title", data["name"].to_s)
tagger.add_text_tag("artist", @artist)
tagger.add_text_tag("album", @album)
tagger.add_text_tag("genre",
@spotify_searcher.find_genre(data["artists"][0]["id"].to_s))
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 as
# music_directory > artist_name > album_name > song
# Must be called AFTER the song has been downloaded.
#
# ```
# s = Song.new("Bohemian Rhapsody", "Queen").grab_it
# s.organize_it("/home/cooper/Music")
# # Will move the mp3 file to
# # /home/cooper/Music/Queen/A Night At The Opera/1 - Bohemian Rhapsody.mp3
# ```
def organize_it(music_directory : String)
path = Path[music_directory].expand(home: true)
path = path / @artist_name.gsub(/[\/]/, "").gsub(" ", " ")
path = path / @album.gsub(/[\/]/, "").gsub(" ", " ")
strpath = path.to_s
if !File.directory?(strpath)
FileUtils.mkdir_p(strpath)
end
safe_filename = @filename.gsub(/[\/]/, "").gsub(" ", " ")
File.rename("./" + @filename, (path / safe_filename).to_s)
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

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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

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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

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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()

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require "./bottle/cli"
def main
cli = CLI.new(ARGV)
cli.act_on_args
end
main()

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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, offset, limit)
url = @root_url.join("search?q=#{query}").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
genre = get_item("artist", id)["genres"][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,
offset : Int32, limit : Int32) : 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].gsub(" ", "+") + "+"
else
query += param_encode(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 += param_encode(k, item_parameters[k])
end
end
# extra api info
query += "&type=#{item_type}&limit=#{limit}&offset=#{offset}"
return query
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
# Returns a `String` encoded for the spotify api
#
# ```
# query_encode("album", "A Night At The Opera")
# => "album:A+Night+At+The+Opera"
# ```
private def param_encode(key : String, value : String) : String
return key.gsub(" ", "+") + ":" + value.gsub(" ", "+") + "+"
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"
# })

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require "http"
require "xml"
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 ",
]
GARBAGE_PHRASES = [
"cover", "album", "live", "clean", "version", "full", "full album", "row",
"at", "@", "session", "how to", "npr music", "reimagined", "hr version",
"trailer",
]
GOLDEN_PHRASES = [
"official video", "official music video",
]
# 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.
#
# ```
# Youtube.find_url("Bohemian Rhapsody", "Queen")
# => "https://www.youtube.com/watch?v=dQw4w9WgXcQ"
# ```
def find_url(song_name : String, artist_name : String, search_terms = "",
download_first = false) : String?
query = (song_name + " " + artist_name + " " + search_terms).strip.gsub(" ", "+")
url = "https://www.youtube.com/results?search_query=" + query
response = HTTP::Client.get(url)
valid_nodes = get_video_link_nodes(response.body)
if valid_nodes.size == 0
puts "There were no results for that query."
return nil
end
root = "https://youtube.com"
return root + valid_nodes[0]["href"] if download_first
ranked = rank_videos(song_name, artist_name, query, valid_nodes)
begin
return root + valid_nodes[ranked[0]["index"]]["href"]
rescue IndexError
return nil
end
end
# Will rank videos according to their title and the user input
# Return:
# [
# {"points" => x, "index" => x},
# ...
# ]
private def rank_videos(song_name : String, artist_name : String,
query : String, nodes : Array(XML::Node)) : Array(Hash(String, Int32))
points = [] of Hash(String, Int32)
index = 0
nodes.each do |node|
pts = 0
pts += points_compare(song_name, node["title"])
pts += points_compare(artist_name, node["title"])
pts += count_buzzphrases(query, node["title"])
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
# 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_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
# 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
# Finds valid video links from a `HTTP::Client.get` request
# Returns an `Array` of `XML::Node`
private def get_video_link_nodes(doc : String) : Array(XML::Node)
nodes = XML.parse(doc).xpath_nodes("//a")
valid_nodes = [] of XML::Node
nodes.each do |node|
if video_link_node?(node)
valid_nodes.push(node)
end
end
return valid_nodes
end
# Tests if the provided `XML::Node` has a valid link to a video
# Returns a `Bool`
private def video_link_node?(node : XML::Node) : Bool
# If this passes, then the node links to a playlist, not a video
if node["href"]?
return false if node["href"].includes?("&list=")
end
VALID_LINK_CLASSES.each do |valid_class|
if node["class"]?
return true if node["class"].includes?(valid_class)
end
end
return false
end
end