Add album art fetching from Musicbrainz, fix GH-265

dev/releases/3.2.yml

@@ -23,6 +23,7 @@ minor_release_name: "Nicole"
 3.2.1:
     notes:
     - "[Feature] Added setting for custom week offset"
+    - "[Feature] Added Musicbrainz album art fetching"
     - "[Bugfix] Fixed album entity rows being marked as track entity rows"
     - "[Bugfix] Fixed scrobbling of tracks when all artists have been removed by server parsing"
     - "[Bugfix] Fixed Spotify import of multiple files"

maloja/pkg_global/conf.py

@@ -201,7 +201,7 @@ malojaconfig = Configuration(
 			"display_art_icons":(tp.Boolean(),									"Display Album/Artist Icons",	True),
 			"default_album_artist":(tp.String(),								"Default Albumartist",			"Various Artists"),
 			"use_album_artwork_for_tracks":(tp.Boolean(),						"Use Album Artwork for tracks",	True),
-			"fancy_placeholder_art":(tp.Boolean(),								"Use fancy placeholder artwork",True),
+			"fancy_placeholder_art":(tp.Boolean(),								"Use fancy placeholder artwork",False),
 			"discourage_cpu_heavy_stats":(tp.Boolean(),							"Discourage CPU-heavy stats",	False,					"Prevent visitors from mindlessly clicking on CPU-heavy options. Does not actually disable them for malicious actors!"),
 			"use_local_images":(tp.Boolean(),									"Use Local Images",				True),
 			#"local_image_rotate":(tp.Integer(),									"Local Image Rotate",			3600),

maloja/thirdparty/musicbrainz.py

@@ -13,12 +13,14 @@ class MusicBrainz(MetadataInterface):
 	lock = threading.Lock()
 	useragent = USER_AGENT
 
+
+	thumbnailsize_order = ['500','large','1200','250','small']
+
 	settings = {
 	}
 
 	metadata = {
 		"response_type":"json",
-		"response_parse_tree_track": ["images",0,"thumbnails","500"],
 		"required_settings": [],
 	}
 
@@ -27,7 +29,57 @@ class MusicBrainz(MetadataInterface):
 		# not supported
 
 	def get_image_album(self,album):
-		return None
+		self.lock.acquire()
+		try:
+			artists, title = album
+			searchstr = f'release:"{title}"'
+			for artist in artists:
+				searchstr += f' artist:"{artist}"'
+			querystr = urllib.parse.urlencode({
+				"fmt":"json",
+				"query":searchstr
+			})
+			req = urllib.request.Request(**{
+				"url":"https://musicbrainz.org/ws/2/release?" + querystr,
+				"method":"GET",
+				"headers":{
+					"User-Agent":self.useragent
+				}
+			})
+			response = urllib.request.urlopen(req)
+			responsedata = response.read()
+			data = json.loads(responsedata)
+			entity = data["releases"][0]
+			coverartendpoint = "release"
+			while True:
+				mbid = entity["id"]
+				try:
+					response = urllib.request.urlopen(
+						f"https://coverartarchive.org/{coverartendpoint}/{mbid}?fmt=json"
+					)
+					responsedata = response.read()
+					data = json.loads(responsedata)
+					thumbnails = data['images'][0]['thumbnails']
+					for size in self.thumbnailsize_order:
+						if thumbnails.get(size) is not None:
+							imgurl = thumbnails.get(size)
+							continue
+				except:
+					imgurl = None
+				if imgurl is None:
+					entity = entity["release-group"]
+					# this will raise an error so we don't stay in the while loop forever
+					coverartendpoint = "release-group"
+					continue
+
+				imgurl = self.postprocess_url(imgurl)
+				return imgurl
+
+		except Exception:
+			return None
+		finally:
+			time.sleep(2)
+			self.lock.release()
 
 	def get_image_track(self,track):
 		self.lock.acquire()
@@ -60,7 +112,11 @@ class MusicBrainz(MetadataInterface):
 					)
 					responsedata = response.read()
 					data = json.loads(responsedata)
-					imgurl = self.metadata_parse_response_track(data)
+					thumbnails = data['images'][0]['thumbnails']
+					for size in self.thumbnailsize_order:
+						if thumbnails.get(size) is not None:
+							imgurl = thumbnails.get(size)
+							continue
 				except:
 					imgurl = None
 				if imgurl is None: