[gnome-music/wip/jfelder/lastfm-ui-part-2: 5/9] scrobbler: Add a configure account operation

[Jean Felder <jfelder src gnome org>]

commit 8f776b9e2c1af75087635f42e956bae450a65420
Author: Jean Felder <jfelder src gnome org>
Date:   Tue Jan 14 21:38:25 2020 +0100

    scrobbler: Add a configure account operation
    
    If no account has been configured yet, GNOME settings is launched with
    a dialog to add a Last.fm account.
    If an account has already been configured, GNOME settings is launched with
    a dialog to edit this account.

 gnomemusic/scrobbler.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++++-
 org.gnome.Music.json    |  1 +
 2 files changed, 52 insertions(+), 1 deletion(-)
---
diff --git a/gnomemusic/scrobbler.py b/gnomemusic/scrobbler.py
index f3cc5ac3..1a58f52f 100644
--- a/gnomemusic/scrobbler.py
+++ b/gnomemusic/scrobbler.py
@@ -28,7 +28,7 @@ import logging
 
 import gi
 gi.require_versions({"Goa": "1.0", "GoaBackend": "1.0", "Soup": "2.4"})
-from gi.repository import GLib, Goa, GoaBackend, GObject, Soup
+from gi.repository import Gio, GLib, Goa, GoaBackend, GObject, Soup
 
 from gnomemusic import log
 import gnomemusic.utils as utils
@@ -171,6 +171,53 @@ class GoaLastFM(GObject.GObject):
                 "Error: Unable to retrieve last.fm session key", e.message)
             return None
 
+    def configure(self):
+        if self.props.state == GoaLastFM.State.NOT_AVAILABLE:
+            logger.warning("Error, cannot configure a Last.fm account.")
+            return
+
+        Gio.bus_get(Gio.BusType.SESSION, None, self._get_connection_db, None)
+
+    def _get_connection_db(self, source, res, user_data=None):
+        try:
+            connection = Gio.bus_get_finish(res)
+        except GLib.Error as e:
+            logger.warning(
+                "Error: Unable to get the DBus connection:", e.message)
+            return
+
+        Gio.DBusProxy.new(
+            connection, Gio.DBusProxyFlags.NONE, None,
+            "org.gnome.ControlCenter", "/org/gnome/ControlCenter",
+            "org.gtk.Actions", None, self._get_control_center_proxy_cb, None)
+
+    def _get_control_center_proxy_cb(self, source, res, user_data=None):
+        try:
+            settings_proxy = Gio.DBusProxy.new_finish(res)
+        except GLib.Error as e:
+            logger.warning(
+                "Error: Unable to get a proxy:", e.message)
+            return
+
+        if self._state == GoaLastFM.State.NOT_CONFIGURED:
+            params = [GLib.Variant("s", "add"), GLib.Variant("s", "lastfm")]
+        else:
+            params = [GLib.Variant("s", self._account.props.id)]
+
+        args = GLib.Variant("(sav)", ("online-accounts", params))
+        variant = GLib.Variant("(sava{sv})", ("launch-panel", [args], {}))
+        settings_proxy.call(
+            "Activate", variant, Gio.DBusCallFlags.NONE, -1, None,
+            self._on_control_center_activated)
+
+    def _on_control_center_activated(self, proxy, res, user_data=None):
+        try:
+            proxy.call_finish(res)
+        except GLib.Error as e:
+            logger.warning(
+                "Error: Failed to activate control-center: {}".format(
+                    e.message))
+
 
 class LastFmScrobbler(GObject.GObject):
     """Scrobble songs to Last.fm"""
@@ -199,6 +246,9 @@ class LastFmScrobbler(GObject.GObject):
         self._soup_session = Soup.Session.new()
         self._scrobble_cache = []
 
+    def configure(self):
+        self._goa_lastfm.configure()
+
     @GObject.Property(type=int, default=GoaLastFM.State.NOT_AVAILABLE)
     def account_state(self):
         """Get the Last.fm account state
diff --git a/org.gnome.Music.json b/org.gnome.Music.json
index c1e440c5..1457394f 100644
--- a/org.gnome.Music.json
+++ b/org.gnome.Music.json
@@ -16,6 +16,7 @@
         "--filesystem=xdg-run/dconf", "--filesystem=~/.config/dconf:ro",
         "--talk-name=ca.desrt.dconf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf",
         "--own-name=org.mpris.MediaPlayer2.GnomeMusic",
+        "--talk-name=org.gnome.ControlCenter",
         "--talk-name=org.gnome.SettingsDaemon.MediaKeys",
         "--talk-name=com.intel.dleyna-server",
         "--talk-name=org.gtk.vfs",