make the way mp3s are saved configurable

Signed-off-by: Luca Schlecker <luca.schlecker@hotmail.com>

README.md

@@ -96,6 +96,8 @@ If you're one of those cool people who compiles from source
     ```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:
@@ -122,6 +124,8 @@ Here's what they do:
 ```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:
@@ -132,8 +136,8 @@ single_folder_playlist:
  - `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`
+ - `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
@@ -145,6 +149,55 @@ single_folder_playlist:
     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

src/bottle/cli.cr

@@ -83,7 +83,7 @@ class CLI
       s = Song.new(@args["song"], @args["artist"])
       s.provide_client_keys(Config.client_key, Config.client_secret)
       s.grab_it(@args["url"]?)
-      s.organize_it(Config.music_directory)
+      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)

src/bottle/config.cr

@@ -9,6 +9,8 @@ EXAMPLE_CONFIG = <<-EOP
 #{Style.dim "===="}
 #{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"}: 
@@ -24,6 +26,8 @@ module Config
   @@arguments = [
     "binary_directory",
     "music_directory",
+    "filename_pattern",
+    "directory_pattern",
     "client_key",
     "client_secret",
     "single_folder_playlist: enabled",
@@ -50,6 +54,14 @@ module Config
     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

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/glue/album.cr

@@ -42,6 +42,6 @@ class Album < SpotifyList
   end
 
   private def organize(song : Song)
-    song.organize_it(@home_music_directory)
+    song.organize_it()
   end
 end

src/glue/playlist.cr

@@ -69,7 +69,7 @@ class Playlist < SpotifyList
       safe_filename = song.filename.gsub(/[\/]/, "").gsub("  ", " ")
       File.rename("./" + song.filename, (path / safe_filename).to_s)
     else
-      song.organize_it(@home_music_directory)
+      song.organize_it()
     end
   end
 end

src/glue/song.cr

@@ -4,6 +4,8 @@ require "../search/youtube"
 require "../interact/ripper"
 require "../interact/tagger"
 
+require "../bottle/config"
+require "../bottle/pattern"
 require "../bottle/styles"
 
 class Song
@@ -83,7 +85,7 @@ class Song
     end
 
     data = @metadata.as(JSON::Any)
-    @filename = data["track_number"].to_s + " - #{data["name"].to_s}.mp3"
+    @filename = "#{Pattern.parse(Config.filename_pattern, data)}.mp3"
 
     if ask_url
       outputter("url", 4)
@@ -154,20 +156,24 @@ class Song
     outputter("finished", 0)
   end
 
-  # Will organize the song into the user's provided music directory as
-  # music_directory > artist_name > album_name > song
+  # 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("/home/cooper/Music")
-  # # Will move the mp3 file to
+  # 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(music_directory : String)
-    path = Path[music_directory].expand(home: true)
-    path = path / @artist_name.gsub(/[\/]/, "").gsub("  ", " ")
-    path = path / @album.gsub(/[\/]/, "").gsub("  ", " ")
+  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)