Add artist command

.env.sample

@@ -24,5 +24,11 @@ NEWS_API_KEY=ThisIsSampleAPIKeyj985uYheRgw53IHuhs9OOindbrv6atResi
 # Use in cook.rb
 RAKUTEN_COOK_ID=ThisIsSampleSwimmyCookIDkfjgikdjrmkhfgc
 
+<<<<<<< HEAD
 # Use in translate.rb
 TRANSLATE_API_URL=ThisIsSampleSwimmyHizukiTranslateGAS
+=======
+# Use in spotify.rb
+SPOTIFY_CLIENT_ID=ThisIsSampleSpotifyClientID
+SPOTIFY_CLIENT_SECRET=ThisIsSampleSpotifyClientSecret
+>>>>>>> be4210c (Add artist command)

Gemfile

@@ -17,3 +17,4 @@ gem 'enumdate'
 gem 'mqtt'
 gem 'news-api'
 gem 'nokogiri'
+gem 'rspotify'

lib/swimmy/command/artist.rb

@@ -0,0 +1,50 @@
+module Swimmy
+  module Command
+    class Artist < Swimmy::Command::Base
+      command "artist" do |client, data, match|   
+        case match[:expression]
+        when nil
+          msg = "引数の数が正しくありません．検索するアーティスト名を入力してください．"
+        when "help"
+          msg = help_message("artist")
+        else        
+          begin 
+            spotify = Swimmy::Service::Spotify.new(ENV['SPOTIFY_CLIENT_ID'], ENV['SPOTIFY_CLIENT_SECRET'])
+            artist_info = spotify.search(match[:expression])
+          rescue => e
+            msg = "アーティスト情報を取得できませんでした．API認証に失敗した可能性があります．"
+          end
+
+          # 人気曲は最大10件，関連アーティストは最大5件
+          num_tracks = 10
+          num_related_artists = 5
+          msg = make_artist_message(artist_info, num_tracks, num_related_artists)  
+        end 
+
+        client.say(channel: data.channel, text: msg)
+      end #command
+
+      def self.make_artist_message(artist_info, num_tracks, num_related_artists)
+        msg = ""
+        msg << "検索結果: *#{artist_info.name}*\n"
+
+        msg << "*[楽曲ジャンル]*\n"
+        artist_info.genres.each { |genre| msg << "・#{genre}\n" }
+
+        msg << "*[人気曲]*\n"
+        artist_info.popular_tracks(num_tracks).each { |track| msg << "・#{track}\n" }
+
+        msg << "*[関連アーティスト]*\n"
+        artist_info.related_artists(num_related_artists).each { |related_artist| msg << "・#{related_artist}\n" }
+
+        return msg
+      end
+
+      help do
+        title "artist"
+        desc "アーティストに関連する情報を表示します"
+        long_desc "artist <artist name> - アーティストの楽曲ジャンル，人気楽曲，関連アーティストを表示します"
+      end #help
+    end #class Coop    
+  end #module Command
+end #module Swimmy

lib/swimmy/resource.rb

@@ -22,5 +22,6 @@ module Resource
     autoload :CookResource, "#{dir}/cook_resource.rb"
     autoload :BookmarkEntry, "#{dir}/bookmark.rb"
     autoload :CalendarEvent, "#{dir}/calendar_event.rb"
+    autoload :ArtistInfo , "#{dir}/artist_info.rb"
   end
 end

lib/swimmy/resource/artist_info.rb

@@ -0,0 +1,36 @@
+module Swimmy
+  module Resource
+    class ArtistInfo
+      def initialize(name, genres, tracks, related_artists)
+        @name = name
+        @genres = genres  
+        @tracks = tracks
+        @related_artists = related_artists
+      end
+
+      def name
+        return @name
+      end
+
+      def genres
+        return @genres
+      end
+
+      def popular_tracks(num)
+        # popularityの値が大きい順にソート
+        sorted_tracks = @tracks.sort_by{|track| track.popularity}.reverse
+        tracks = []
+        sorted_tracks[0, num].each { |track| tracks << "#{track.name}" }
+        return tracks
+      end
+
+      def related_artists(num)
+        related_artists = []
+        # 先頭は検索結果のアーティストのため除外
+        @related_artists[1, num].each { |related_artist| related_artists << "#{related_artist.name}" }
+        return related_artists
+      end
+
+    end
+  end
+end  # module Swimmy

lib/swimmy/service.rb

@@ -23,5 +23,6 @@ module Service
     autoload :Translate, "#{dir}/translate.rb"
     autoload :Numbersapi, "#{dir}/numbersapi.rb"
     autoload :GoogleCalendar, "#{dir}/schedule_service.rb"
+    autoload :Spotify, "#{dir}/spotify.rb"
   end
 end

lib/swimmy/service/spotify.rb

@@ -0,0 +1,23 @@
+module Swimmy
+  module Service
+    class Spotify
+      require 'rspotify'
+
+      def initialize(client_id, client_secret)
+        # Spotify-APIの認証
+        RSpotify.authenticate(client_id, client_secret)
+      end
+
+      def search(artist_name)
+        artists = RSpotify::Artist.search(artist_name)
+        # 先頭要素のアーティストを検索結果とする
+        artist = artists.first
+        name = artist.name
+        genres = artist.genres
+        tracks = artist.top_tracks(:JP)
+
+        return Swimmy::Resource::ArtistInfo.new(name, genres, tracks, artists)
+      end
+    end # class Spotify
+  end # module Service
+end # module Swimmy