[grilo-plugins] magnatune: Add cover art support

[Victor Toso de Carvalho <victortoso src gnome org>]

commit 81076c6da54599acd814e2ce628fb6e2208cbed5
Author: Jean Felder <jfelder src gnome org>
Date:   Sat Mar 31 13:41:57 2018 +0200

    magnatune: Add cover art support
    
    It follows the specifications defined at:
    http://magnatune.com/info/sqlite-normalized
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794845
    Signed-off-by: Victor Toso <me victortoso com>

 src/magnatune/grl-magnatune.c |   42 ++++++++++++++++++++++++++++++++++++----
 1 files changed, 37 insertions(+), 5 deletions(-)
---
diff --git a/src/magnatune/grl-magnatune.c b/src/magnatune/grl-magnatune.c
index ebd7239..8bd381b 100644
--- a/src/magnatune/grl-magnatune.c
+++ b/src/magnatune/grl-magnatune.c
@@ -107,10 +107,16 @@ GRL_LOG_DOMAIN_STATIC(magnatune_log_domain);
 
 /* --- URLs --- */
 
-#define URL_GET_DB    "http://he3.magnatune.com/info/sqlite_normalized.db";
-#define URL_GET_CRC   "http://magnatune.com/info/changed.txt";
+#define URL_GET_DB     "http://he3.magnatune.com/info/sqlite_normalized.db";
+#define URL_GET_CRC    "http://magnatune.com/info/changed.txt";
 
-#define URL_SONG_PLAY "http://he3.magnatune.com/all";
+#define URL_SONG_PLAY  "http://he3.magnatune.com/all";
+#define URL_SONG_COVER "http://he3.magnatune.com/music";
+
+/* --- Cover Art --- */
+
+#define URL_SONG_COVER_FORMAT URL_SONG_COVER "/%s/%s/cover_%d.jpg"
+static gint cover_art_sizes[] = { 50, 75, 100, 160, 200, 300, 600, 1400 };
 
 /* --- Other --- */
 
@@ -592,6 +598,12 @@ magnatune_check_update(void)
   g_free(new_db_path);
 }
 
+static void
+add_cover (gpointer url_to_cover, gpointer media)
+{
+  grl_media_add_thumbnail((GrlMedia *) media, url_to_cover);
+}
+
 
 static GrlMedia *
 build_media(gint track_id,
@@ -600,7 +612,8 @@ build_media(gint track_id,
             const gchar *track_name,
             gint track_number,
             gint duration,
-            const gchar *url_to_mp3)
+            const gchar *url_to_mp3,
+            GPtrArray *url_to_covers)
 {
   GrlMedia *media = NULL;
   gchar *str_track_id = NULL;
@@ -613,6 +626,8 @@ build_media(gint track_id,
   grl_media_set_duration(media, duration);
   grl_media_set_title(media, track_name);
 
+  g_ptr_array_foreach(url_to_covers, add_cover, media);
+
   str_track_id = g_strdup_printf("%d", track_id);
   grl_media_set_id(media, str_track_id);
   g_free(str_track_id);
@@ -625,6 +640,7 @@ build_media_track_from_stmt(sqlite3_stmt *sql_stmt)
 {
   GrlMedia *media = NULL;
 
+  gint i;
   gint track_id;
   gint duration;
   gint track_number;
@@ -634,6 +650,9 @@ build_media_track_from_stmt(sqlite3_stmt *sql_stmt)
   const gchar *raw_url;
   gchar *encoded_url;
   gchar *url_to_mp3;
+  gchar *encoded_artist;
+  gchar *encoded_album;
+  GPtrArray *url_to_covers;
 
   track_id = (guint) sqlite3_column_int(sql_stmt, MAGNATUNE_TRACK_ID);
   artist_name = (gchar *) sqlite3_column_text(sql_stmt, MAGNATUNE_ARTIST_NAME);
@@ -645,11 +664,24 @@ build_media_track_from_stmt(sqlite3_stmt *sql_stmt)
 
   encoded_url = g_uri_escape_string(raw_url, "", FALSE);
   url_to_mp3 = g_strdup_printf("%s/%s", URL_SONG_PLAY, encoded_url);
+
+  encoded_artist = g_uri_escape_string(artist_name, "", FALSE);
+  encoded_album = g_uri_escape_string(album_name, "", FALSE);
+  url_to_covers = g_ptr_array_new();
+  for (i = 0; i < G_N_ELEMENTS(cover_art_sizes); i++) {
+    gchar *cover = g_strdup_printf(URL_SONG_COVER_FORMAT, encoded_artist,
+                                   encoded_album, cover_art_sizes[i]);
+    g_ptr_array_add(url_to_covers, cover);
+  }
+
   media = build_media(track_id, artist_name, album_name, track_name,
-                      track_number, duration, url_to_mp3);
+                      track_number, duration, url_to_mp3, url_to_covers);
 
   g_free(encoded_url);
   g_free(url_to_mp3);
+  g_free(encoded_artist);
+  g_free(encoded_album);
+  g_ptr_array_free(url_to_covers, TRUE);
 
   return media;
 }