Spotify

Added four action on Social controller.

• spotify ($username,$type="getPlaylists")
• spotifyGenerateFeed($username,$playlist)
• spotifyCheckPermissions($username,$playlist,$token)
• SpotifyGetToken()

spotify

User entry point.
Return a feed of user's playlists, or a feed of feed with playlist's tracks

• $username
  • Spotify username
• $type
  • getPlaylists
    • Return a feed of type links, with
      • Content = outside
      • link = playlist's uri
  • getTracks
    • Return a feed of feed of type links
    • The external feed is a list of user's playlist from which we are allowed to recover the tracks 
      • spotifyCheckPermissions is called from this scope
    • The internal feed is a feed of links similar to getPlaylist
      • Content = outside
      • link = track's uri
      • The internal feed is generated by spotifyGenerateFeed, 

spotifyGenerateFeed

• $username
  • Spotify username
• $playlist
  • Spotify playlist's id
• Return playlist's tracks as a feed of links
  • Content = outside
  • Link = track's uri

spotifyCheckPermissions

For internal use, user will not see this.

• $username
  • Spotify username
• $playlist
  • Spotify playlist's id
• $token
  • Bearer Authentication token, retrieved with SpotifyGetToken

Return a bool.

• true - query for tracks on playlist is allowed
• false - query for tracks on playlist is not allowed

SpotifyGetToken

Make a POST call to retrieve an authentication token.