[grilo-plugins/wip/jfelder/acoustid-retrieve-more-keys] acoustid: Retrieve additional keys

[Jean Felder <jfelder src gnome org>]

commit 1578f94469e193bacc105773143f607845bb3978
Author: Jean Felder <jfelder src gnome org>
Date:   Sun Sep 2 18:35:12 2018 +0200

    acoustid: Retrieve additional keys
    
    Add support for album_disc_number, publication_date and track_number
    tags.

 src/lua-factory/sources/grl-acoustid.lua | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/src/lua-factory/sources/grl-acoustid.lua b/src/lua-factory/sources/grl-acoustid.lua
index 3d73386..966866d 100644
--- a/src/lua-factory/sources/grl-acoustid.lua
+++ b/src/lua-factory/sources/grl-acoustid.lua
@@ -28,7 +28,7 @@ source = {
   id = "grl-acoustid",
   name = "Acoustid",
   description = "a source that provides audio identification",
-  supported_keys = { "title", "album", "artist", "mb-recording-id", "mb-album-id", "mb-artist-id", 
"mb-release-group-id", "mb-release-id" },
+  supported_keys = { "title", "album", "artist", "mb-recording-id", "mb-album-id", "mb-artist-id", 
"mb-release-group-id", "mb-release-id", "album-disc-number", "publication-date", "track-number" },
   supported_media = { 'audio' },
   config_keys = {
     required = { "api-key" },
@@ -50,7 +50,7 @@ netopts = {
 acoustid = {}
 
 -- https://acoustid.org/webservice#lookup
-ACOUSTID_LOOKUP = 
"https://api.acoustid.org/v2/lookup?client=%s&meta=recordings+releasegroups+releases&duration=%d&fingerprint=%s";
+ACOUSTID_LOOKUP = 
"https://api.acoustid.org/v2/lookup?client=%s&meta=recordings+releasegroups+releases+tracks+compress&duration=%d&fingerprint=%s";
 
 ---------------------------------
 -- Handlers of Grilo functions --
@@ -135,6 +135,18 @@ function build_media(results)
   if album and album.releases and #album.releases > 0 then
     release = album.releases[1]
     media.mb_release_id = keys.mb_album_id and release.id or nil
+
+    if release.date then
+      media.publication_date = keys.publication_date and release.date.year or nil
+    end
+
+    if release.mediums and #release.mediums > 0 then
+      medium = release.mediums[1]
+      media.album_disc_number = keys.album_disc_number and medium.position or nil
+      if medium.tracks and #medium.tracks > 0 then
+       media.track_number = keys.track_number and medium.tracks[1].position or nil
+      end
+    end
   end
 
   return media