[gnome-music/wip/jfelder/mpris-cleanup: 14/24] mpris: Change naming convention to snake_case

[Jean Felder <jfelder src gnome org>]

commit d9bd3e7d34a29739a98489e3f0f49bacd84f1929
Author: Jean Felder <jfelder src gnome org>
Date:   Tue Oct 16 17:01:08 2018 +0200

    mpris: Change naming convention to snake_case
    
    Rename previous _get_playlists method to _get_grilo_playlists to avoid
    the confusion with the MPRIS method.

 gnomemusic/mpris.py | 73 +++++++++++++++++++++++++++++------------------------
 1 file changed, 40 insertions(+), 33 deletions(-)
---
diff --git a/gnomemusic/mpris.py b/gnomemusic/mpris.py
index cb242ea9..e2e8fa07 100644
--- a/gnomemusic/mpris.py
+++ b/gnomemusic/mpris.py
@@ -24,6 +24,7 @@
 # delete this exception statement from your version.
 
 import logging
+import re
 
 from gi.repository import Gio, GLib
 
@@ -38,6 +39,11 @@ import gnomemusic.utils as utils
 logger = logging.getLogger(__name__)
 
 
+def camelcase_to_snake_case(name):
+    s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
+    return '_' + re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()
+
+
 class DBusInterface:
 
     def __init__(self, con, path):
@@ -78,7 +84,8 @@ class DBusInterface:
                 fd_list = msg.get_unix_fd_list()
                 args[i] = fd_list.get(args[i])
 
-        result = getattr(self, method_name)(*args)
+        method_snake_name = camelcase_to_snake_case(method_name)
+        result = getattr(self, method_snake_name)(*args)
 
         # out_args is at least (signature1). We therefore always wrap the
         # result as a tuple.
@@ -385,7 +392,7 @@ class MPRIS(DBusInterface):
                     GLib.Variant('ao', self._path_list),
                     GLib.Variant('o', current_song_path)))
 
-            self.PropertiesChanged(
+            self._properties_changed(
                 MPRIS.MEDIA_PLAYER2_TRACKLIST_IFACE,
                 {'Tracks': GLib.Variant('ao', self._path_list), }, [])
 
@@ -479,7 +486,7 @@ class MPRIS(DBusInterface):
                 properties['CanPlay'] = GLib.Variant('b', True)
                 self._first_song_played = True
 
-            self.PropertiesChanged(
+            self._properties_changed(
                 MPRIS.MEDIA_PLAYER2_PLAYER_IFACE, properties, [])
             self._metadata_timeout = None
             self._current_thumbnail = current_song.get_thumbnail()
@@ -502,7 +509,7 @@ class MPRIS(DBusInterface):
         if (not self._metadata_timeout
                 and new_thumbnail != self._current_thumbnail):
             metadata = self._get_metadata(self.player.props.current_song)
-            self.PropertiesChanged(
+            self._properties_changed(
                 MPRIS.MEDIA_PLAYER2_PLAYER_IFACE,
                 {
                     'Metadata': GLib.Variant('a{sv}', metadata),
@@ -517,7 +524,7 @@ class MPRIS(DBusInterface):
             return
 
         self._previous_playback_status = playback_status
-        self.PropertiesChanged(MPRIS.MEDIA_PLAYER2_PLAYER_IFACE,
+        self._properties_changed(MPRIS.MEDIA_PLAYER2_PLAYER_IFACE,
                                {
                                    'PlaybackStatus': GLib.Variant('s', playback_status),
                                },
@@ -535,7 +542,7 @@ class MPRIS(DBusInterface):
             properties['LoopStatus'] = GLib.Variant('s', loop_status)
             self._previous_loop_status = loop_status
 
-        self.PropertiesChanged(
+        self._properties_changed(
             MPRIS.MEDIA_PLAYER2_PLAYER_IFACE, properties, [])
 
     @log
@@ -552,7 +559,7 @@ class MPRIS(DBusInterface):
             self._previous_can_go_previous = has_previous
 
         if properties:
-            self.PropertiesChanged(
+            self._properties_changed(
                 MPRIS.MEDIA_PLAYER2_PLAYER_IFACE, properties, [])
 
     @log
@@ -570,7 +577,7 @@ class MPRIS(DBusInterface):
         if (self.player.get_playlist_type() == PlayerPlaylist.Type.PLAYLIST
                 or self._player_previous_type == PlayerPlaylist.Type.PLAYLIST):
             variant = GLib.Variant('(b(oss))', self._get_active_playlist())
-            self.PropertiesChanged(
+            self._properties_changed(
                 MPRIS.MEDIA_PLAYER2_PLAYLISTS_IFACE,
                 {'ActivePlaylist': variant, }, [])
 
@@ -580,7 +587,7 @@ class MPRIS(DBusInterface):
     def _reload_playlists(self):
         def query_playlists_callback(playlists):
             self.playlists = playlists
-            self.PropertiesChanged(MPRIS.MEDIA_PLAYER2_PLAYLISTS_IFACE,
+            self._properties_changed(MPRIS.MEDIA_PLAYER2_PLAYLISTS_IFACE,
                                    {
                                        'PlaylistCount': GLib.Variant('u', len(playlists)),
                                    },
@@ -605,35 +612,35 @@ class MPRIS(DBusInterface):
     def _on_grilo_ready(self, grilo):
         self._reload_playlists()
 
-    def Raise(self):
+    def _raise(self):
         self.app.do_activate()
 
-    def Quit(self):
+    def _quit(self):
         self.app.quit()
 
-    def Next(self):
+    def _next(self):
         self.player.next()
 
-    def Previous(self):
+    def _previous(self):
         self.player.previous()
 
-    def Pause(self):
+    def _pause(self):
         self.player.pause()
 
-    def PlayPause(self):
+    def _play_pause(self):
         self.player.play_pause()
 
-    def Stop(self):
+    def _stop(self):
         self.player.stop()
 
-    def Play(self):
+    def _play(self):
         """Start or resume playback.
 
         If there is no track to play, this has no effect.
         """
         self.player.play()
 
-    def Seek(self, offset_msecond):
+    def _seek(self, offset_msecond):
         """Seek forward in the current track.
 
         Seek is relative to the current player position.
@@ -650,7 +657,7 @@ class MPRIS(DBusInterface):
         else:
             self.player.next()
 
-    def SetPosition(self, track_id, position_msecond):
+    def _set_position(self, track_id, position_msecond):
         """Set the current track position in microseconds.
 
         :param str track_id: The currently playing track's identifier
@@ -662,34 +669,34 @@ class MPRIS(DBusInterface):
             return
         self.player.set_position(position_msecond / 1e6)
 
-    def OpenUri(self, uri):
+    def _open_uri(self, uri):
         pass
 
-    def GetTracksMetadata(self, track_paths):
+    def _get_tracks_metadata(self, track_paths):
         metadata = []
         for path in track_paths:
             index = self._path_list.index(path)
             metadata.append(self._metadata_list[index])
         return metadata
 
-    def AddTrack(self, uri, after_track, set_as_current):
+    def _add_track(self, uri, after_track, set_as_current):
         pass
 
-    def RemoveTrack(self, path):
+    def _remove_track(self, path):
         pass
 
-    def GoTo(self, path):
+    def _go_to(self, path):
         current_song_path = self._get_song_dbus_path(
             self.player.props.current_song)
         current_song_index = self._path_list.index(current_song_path)
         goto_index = self._path_list.index(path)
         self.player.play(goto_index - current_song_index)
 
-    def ActivatePlaylist(self, playlist_path):
+    def _activate_playlist(self, playlist_path):
         playlist_id = self._get_playlist_from_dbus_path(playlist_path).get_id()
         self.app._window.views[View.PLAYLIST].activate_playlist(playlist_id)
 
-    def GetPlaylists(self, index, max_count, order, reverse):
+    def _get_playlists(self, index, max_count, order, reverse):
         """Gets a set of playlists (MPRIS Method).
 
         GNOME Music only handles playlists with the Alphabetical order.
@@ -713,10 +720,10 @@ class MPRIS(DBusInterface):
             first_index = None
         return mpris_playlists[index + max_count - 1:first_index:-1]
 
-    def Get(self, interface_name, property_name):
-        return self.GetAll(interface_name)[property_name]
+    def _get(self, interface_name, property_name):
+        return self._get_all(interface_name)[property_name]
 
-    def GetAll(self, interface_name):
+    def _get_all(self, interface_name):
         if interface_name == MPRIS.MEDIA_PLAYER2_IFACE:
             return {
                 'CanQuit': GLib.Variant('b', True),
@@ -774,7 +781,7 @@ class MPRIS(DBusInterface):
             logger.warning(
                 "MPRIS does not implement {} interface".format(interface_name))
 
-    def Set(self, interface_name, property_name, new_value):
+    def _set(self, interface_name, property_name, new_value):
         if interface_name == MPRIS.MEDIA_PLAYER2_IFACE:
             if property_name == 'Fullscreen':
                 pass
@@ -797,8 +804,8 @@ class MPRIS(DBusInterface):
             logger.warning(
                 "MPRIS does not implement {} interface".format(interface_name))
 
-    def PropertiesChanged(self, interface_name, changed_properties,
-                          invalidated_properties):
+    def _properties_changed(self, interface_name, changed_properties,
+                            invalidated_properties):
         self.con.emit_signal(None,
                              '/org/mpris/MediaPlayer2',
                              'org.freedesktop.DBus.Properties',
@@ -807,5 +814,5 @@ class MPRIS(DBusInterface):
                                                     GLib.Variant('a{sv}', changed_properties),
                                                     GLib.Variant('as', invalidated_properties)))
 
-    def Introspect(self):
+    def _introspect(self):
         return self.__doc__