Hello gem

.gitignore

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+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+Gemfile.lock
+.ruby-version
+*.gem
+
+# rspec failure tracking
+.rspec_status

Gemfile

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+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# Specify your gem's dependencies in aeries-api.gemspec
+gemspec

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2022 Derek Povah <https://derekpovah.com>
+
+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

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+Shellify
+========
+
+Use Spotify from the command line
+
+Installation
+------------
+
+Add this line to your application's Gemfile:
+
+```bash
+$ gem install shellify
+```
+
+#### Setup
+
+1. Create a Spotify application in the [Spotify Developer Dashboard](https://developer.spotify.com/dashboard).
+1. Get your Spotify OAUTH `access_token` and `refresh_token`. (Shelilfy currently doesn't currently implement a two way OAUTH flow, but Spotify has [sample apps](https://github.com/spotify/web-api-auth-examples) that you can use  to get your initial keys. Shellify will handle exchanging refresh tokens for access tokens after initial setup.)
+1. Create two json files in `~/.config/shellify`
+    `config.json`
+    ```json
+    {
+      "client_id": "xxxxxxxxxxxxxxxx",
+      "client_secret": "xxxxxxxxxxxxxxx"
+    }
+    ```
+
+    `spotify_user.json`
+    ```json
+    {
+      "id": "spotify_user_id",
+      "token": "xxxxxxxxxxxxxxx",
+      "refresh_token": "xxxxxxxxxxxxxxx"
+    }
+    ```
+
+Commands
+--------
+
+```
+$ shellify
+  Now Playing:
+  3 Libras - A Perfect Circle - 02:24/03:39 - ♥
+```
+
+See `shellify help` for a full list of commands.
+
+RSpotify
+--------
+
+Shellify is basically a just a wrapper for [RSpotify](https://github.com/guilhermesad/rspotify) and wouldn't be possible (without significantly more effort) thanks to the work that's already been done over there.
+
+License
+-------
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

exe/shellify

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+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'shellify'
+
+begin
+  Shellify::Cli.new.run
+rescue Interrupt
+  exit 1
+end

lib/shellify.rb

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+# frozen_string_literal: true
+
+require 'fileutils'
+require 'json'
+require 'rspotify'
+require 'shellify/version'
+
+module Shellify
+  autoload :Cli,     'shellify/cli'
+  autoload :Config,  'shellify/config'
+  autoload :User,    'shellify/user'
+end

lib/shellify/cli.rb

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+# frozen_string_literal: true
+
+require 'commander'
+require 'shellify/utils'
+
+module Shellify
+  class Cli
+    include Commander::Methods
+    include Shellify::Utils
+
+    def initialize
+      $VERBOSE = nil # Suppress warnings from RSpotify's rest-client implementation by default
+      @config = Shellify::Config.new
+      @user = Shellify::User.new(@config.config_dir)
+    end
+
+    def run
+      program :name, 'Shellify'
+      program :version, Shellify::VERSION
+      program :description, 'Use Spotify from the command line'
+
+      command :devices do |c|
+        c.description = 'List available playback devices'
+        c.action do
+          devices = @user.devices
+          devices.each do |device|
+            puts "  #{device.name}#{" - \e[1m𝅘𝅥𝅮\e[22m" if device.is_active}"
+          end
+        end
+      end
+
+      command :playing do |c|
+        c.description = 'List information about the current song'
+        c.action do
+          return puts "  Nothing playing" unless @user.player.playing?
+
+          print_current_song
+        end
+      end
+
+      command :volume do |c|
+        c.description = 'Set the volume of the current playback device'
+        c.action do |args, options|
+          @user.player.volume(args[0])
+        end
+      end
+
+      command :like do |c|
+        c.description = 'Save the current song to your library'
+        c.action do
+          @user.save_tracks!([@user.player.currently_playing])
+        end
+      end
+
+      command :unlike do |c|
+        c.description = 'Remove the current song from your library'
+        c.action do
+          @user.remove_tracks!([@user.player.currently_playing])
+        end
+      end
+
+      command :playlists do |c|
+        c.description = 'List your playlists'
+        c.action do
+          @user.playlists.each do |playlist|
+            puts "  #{playlist.name} - #{playlist.owner.display_name}#{" - Collaborative" if playlist.collaborative}"
+          end
+        end
+      end
+
+      command :add do |c|
+        c.description = 'Add the current song to the provided playlist'
+        c.action do |args, options|
+          return puts "  Nothing playing" unless @user.player.playing?
+
+          playlist = @user.playlists.find { |p| p.name == args[0] }
+          return puts "  Playlist not found" unless playlist
+
+          playlist.add_tracks!([@user.player.currently_playing])
+        end
+      end
+
+      command :remove do |c|
+        c.description = 'Remove the currently playing song from the provided playlist'
+        c.action do |args, options|
+          return puts "  Nothing playing" unless @user.player.playing?
+
+          playlist = @user.playlists.find { |p| p.name == args[0] }
+          return puts "  Playlist not found" unless playlist
+
+          playlist.remove_tracks!([@user.player.currently_playing])
+        end
+      end
+
+      command :play do |c|
+        c.description = 'Play or Pause on the currently playing device'
+        c.action do
+          begin
+            if @user.player.playing?
+              @user.player.pause
+            else
+              @user.player.play
+              print_current_song
+            end
+          rescue RestClient::NotFound
+            @user.player.play(@user.devices.first.id)
+          end
+        end
+      end
+
+      command :next do |c|
+        c.description = 'Skip to the next song in the queue'
+        c.action do
+          @user.player.next
+          print_current_song
+        end
+      end
+
+      command :previous do |c|
+        c.description = 'Skip the the previous song in the queue'
+        c.action do
+          @user.player.previous
+          print_current_song
+        end
+      end
+
+      command :restart do |c|
+        c.description = 'Restart the currently playing song'
+        c.action do
+          @user.player.seek 0
+          print_current_song
+        end
+      end
+
+      command :seek do |c|
+        c.description = 'Seek to the specified time in the current song'
+        c.action do |args, option|
+          @user.player.seek(time_to_ms(args[0]))
+          print_current_song
+        end
+      end
+
+      default_command :playing
+      alias_command :pause, :play
+      alias_command :back, :previous
+      alias_command :skip, :next
+
+      run!
+    end
+
+    private
+
+    def print_current_song
+      playing = @user.player.currently_playing
+      puts '  Now Playing:'
+      puts "  #{playing.name} - #{playing.artists.first.name} - "\
+           "#{duration_to_s(@user.player.progress)}/#{duration_to_s(playing.duration_ms)}"\
+           "#{" - ♥" if @user.saved_tracks?([playing]).first}"
+    end
+
+    def exit_with_message(message, code = 1)
+      puts message
+      exit code
+    end
+  end
+end

lib/shellify/config.rb

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+# frozen_string_literal: true
+
+module Shellify
+  class Config
+    attr_reader :client_id, :client_secret, :config_dir
+
+    CONFIG_DIR = ENV['HOME'] + '/.config/shellify'
+    CONFIG_FILE = CONFIG_DIR + '/config.json'
+
+    def initialize
+      @config_dir = CONFIG_DIR
+      @config_file = CONFIG_FILE
+      create_config_file
+      load_config
+      RSpotify.authenticate(@client_id, @client_secret)
+    end
+
+    private
+
+    def load_config
+      JSON.parse(File.read(CONFIG_FILE)).each_pair { |k,v| instance_variable_set("@#{k}", v) }
+    end
+
+    def create_config_file
+      return if File.exists?(CONFIG_FILE)
+
+      FileUtils.mkdir_p(CONFIG_DIR)
+      FileUtils.touch(CONFIG_FILE)
+      write_default_config
+    end
+
+    def write_default_config
+      File.open(CONFIG_FILE, 'w') do |file|
+      file.write(JSON.pretty_generate({client_id: '', client_secret: ''}))
+      end
+    end
+  end
+end

lib/shellify/user.rb

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+# frozen_string_literal: true
+
+module Shellify
+  class User < RSpotify::User
+
+    USER_FILE = '/spotify_user.json'
+
+    def initialize(config_dir)
+      @config_dir = config_dir
+      create_user_file
+      @spotify_user = load_persisted_user
+      super({
+        'credentials' => {
+          'token' => @spotify_user.token,
+          'refresh_token' => @spotify_user.refresh_token,
+          'access_refresh_callback' => access_refresh_callback,
+        },
+        'id' => @spotify_user.id,
+      })
+    end
+
+    private
+
+    def load_persisted_user
+      OpenStruct.new(JSON.parse(File.read(@config_dir + USER_FILE)))
+    end
+
+    def persist_user(access_token)
+      @spotify_user.token = access_token
+
+      File.open(@config_dir + USER_FILE, 'w') do |file|
+        file.write(JSON.pretty_generate(@spotify_user.to_h))
+      end
+    end
+
+    def access_refresh_callback
+      Proc.new do |new_access_token, _token_lifetime|
+        persist_user(new_access_token)
+      end
+    end
+
+    def create_user_file
+      return if File.exists?(@config_dir + USER_FILE)
+
+      FileUtils.mkdir_p(CONFIG_DIR)
+      FileUtils.touch(@config_dir + USER_FILE)
+    end
+  end
+end