Feat: Add the possibility to select multiple songs and add actions for the selections

[jcorporation]

Discussed in https://github.com/jcorporation/myMPD/discussions/997

Add the possibility to select multiple songs and add actions for the selections.

Refactor APIs

Playlists

• [x] Remove selection from playlist (MYMPD_API_PLAYLIST_CONTENT_RM_POSITIONS)
• [x] Move entries between playlists (MYMPD_API_PLAYLIST_CONTENT_MOVE_TO_PLAYLIST)
• Add selection to playlist
  • [x] MYMPD_API_PLAYLIST_CONTENT_APPEND_URIS
  • [x] MYMPD_API_PLAYLIST_CONTENT_INSERT_URIS
  • [x] MYMPD_API_PLAYLIST_CONTENT_REPLACE_URIS
  • [x] MYMPD_API_PLAYLIST_CONTENT_APPEND_ALBUMS
  • [x] MYMPD_API_PLAYLIST_CONTENT_INSERT_ALBUMS
  • [x] MYMPD_API_PLAYLIST_CONTENT_REPLACE_ALBUMS
  • [x] MYMPD_API_PLAYLIST_CONTENT_APPEND_ALBUM_DISC
  • [x] MYMPD_API_PLAYLIST_CONTENT_INSERT_ALBUM_DISC
  • [x] MYMPD_API_PLAYLIST_CONTENT_REPLACE_ALBUM_DISC
• [x] Remove playlists (MYMPD_API_PLAYLIST_RM)
• [x] Copy/Merge/Move playlists (MYMPD_API_PLAYLIST_COPY)

Queue

• [x] Remove selection from queue (MYMPD_API_QUEUE_RM_IDS)
• [x] Remove selection from jukebox queue (MYMPD_API_JUKEBOX_RM)
• Add selection to queue
  • [x] MYMPD_API_QUEUE_APPEND_URIS
  • [x] MYMPD_API_QUEUE_INSERT_URIS
  • [x] MYMPD_API_QUEUE_REPLACE_URIS
• Add multiple playlists to the queue
  • [x] MYMPD_API_QUEUE_APPEND_PLAYLISTS
  • [x] MYMPD_API_QUEUE_INSERT_PLAYLISTS
  • [x] MYMPD_API_QUEUE_REPLACE_PLAYLISTS
• Add multiple albums to the queue
  • [x] MYMPD_API_QUEUE_APPEND_ALBUMS
  • [x] MYMPD_API_QUEUE_INSERT_ALBUMS
  • [x] MYMPD_API_QUEUE_REPLACE_ALBUMS
  • [x] MYMPD_API_QUEUE_APPEND_ALBUM_DISC
  • [x] MYMPD_API_QUEUE_INSERT_ALBUM_DISC
  • [x] MYMPD_API_QUEUE_REPLACE_ALBUM_DISC
• Play selection after current song
  • [x] MYMPD_API_QUEUE_PRIO_SET
  • [x] MYMPD_API_QUEUE_PRIO_SET_HIGHEST
  • [x] MYMPD_API_QUEUE_MOVE_RELATIVE
• Webradio Favorites
  • [x] MYMPD_API_WEBRADIO_FAVORITE_RM

Add multiple select action to views

• [x] Current queue
• [x] Jukebox queue
• [x] Playlists
• [x] Playlist detail
• [x] Search
• [x] Albums
• [x] Album detail
• [x] Filesystem
• [x] Radio favorites
• [x] WebradioDB
• [x] Radiobrowser

[tobiasjakobi]

I would be very much interested in this feature. Currently playlist management in any of the MusicPD webclients I tried is less than optimal. Sending a selection of the playqueue to a new or existing playlist is something I use very often. Sadly only the abandoned Gnome client (GMPC) lets me do this efficiently.