Reduce search/lookup code redundancy

- drop filelookup.<entity>_search()
- rename filelookup._search() to filelookup.search_entity()
- use a dict to describe different possibilities in tagger.search()
- use filelookup.search_entity() instead of building a methode name to call

picard/browser/filelookup.py

@@ -115,7 +115,7 @@ class FileLookup(object):
     def collection_lookup(self, userid):
         return self._build_launch('/user/%s/collections' % userid)
 
-    def _search(self, type_, query, adv=False):
+    def search_entity(self, type_, query, adv=False):
         if self.mbid_lookup(query, type_):
             return True
         params = {
@@ -126,12 +126,3 @@ class FileLookup(object):
         if adv:
             params['adv'] = 'on'
         return self._build_launch('/search/textsearch', params)
-
-    def artist_search(self, query, adv=False):
-        return self._search('artist', query, adv)
-
-    def album_search(self, query, adv=False):
-        return self._search('release', query, adv)
-
-    def track_search(self, query, adv=False):
-        return self._search('recording', query, adv)

picard/tagger.py

@@ -482,22 +482,31 @@ class Tagger(QtWidgets.QApplication):
 
     def search(self, text, search_type, adv=False):
         """Search on the MusicBrainz website."""
+        search_types = {
+            'track': {
+                'entity': 'recording',
+                'dialog': TrackSearchDialog
+            },
+            'album': {
+                'entity': 'release',
+                'dialog': AlbumSearchDialog
+            },
+            'artist': {
+                'entity': 'artist',
+                'dialog': ArtistSearchDialog
+            },
+        }
+        if search_type not in search_types:
+            return
+        search = search_types[search_type]
         lookup = self.get_file_lookup()
         if config.setting["builtin_search"]:
-            if search_type == "track" and not lookup.mbid_lookup(text, 'recording'):
-                dialog = TrackSearchDialog(self.window)
-                dialog.search(text)
-                dialog.exec_()
-            elif search_type == "album" and not lookup.mbid_lookup(text, 'release'):
-                dialog = AlbumSearchDialog(self.window)
-                dialog.search(text)
-                dialog.exec_()
-            elif search_type == "artist" and not lookup.mbid_lookup(text, 'artist'):
-                dialog = ArtistSearchDialog(self.window)
+            if not lookup.mbid_lookup(text, search['entity']):
+                dialog = search['dialog'](self.window)
                 dialog.search(text)
                 dialog.exec_()
         else:
-            getattr(lookup, search_type + "_search")(text, adv)
+            lookup.search_entity(search['entity'], text, adv)
 
     def collection_lookup(self):
         """Lookup the users collections on the MusicBrainz website."""