[gnome-software] Use a gsetting for auto-refreshing on metered connections

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit 0225ba0ea73cb680adb9527cef4ace47d9fa233b
Author: Joaquim Rocha <jrocha endlessm com>
Date:   Fri Oct 14 11:06:31 2016 +0200

    Use a gsetting for auto-refreshing on metered connections
    
    GNOME Software was simply preventing any checks for updates when on a
    metered connection but some users may have that kind of connection
    as their only one and wish to perform those checks.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772940

 data/org.gnome.software.gschema.xml |    5 +++++
 src/gs-update-monitor.c             |   11 +++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/data/org.gnome.software.gschema.xml b/data/org.gnome.software.gschema.xml
index b291f45..2f9f0f5 100644
--- a/data/org.gnome.software.gschema.xml
+++ b/data/org.gnome.software.gschema.xml
@@ -10,6 +10,11 @@
       <summary>Whether to automatically download updates</summary>
       <description>If enabled, GNOME Software automatically downloads updates in the background and prompts 
the user to install them when ready.</description>
     </key>
+    <key name="refresh-when-metered" type="b">
+      <default>false</default>
+      <summary>Whether to automatically refresh when on a metered connection</summary>
+      <description>If enabled, GNOME Software automatically refreshes in the background even when using a 
metered connection (eventually downloading some metadata, checking for updates, etc., which may incur in 
costs for the user).</description>
+    </key>
     <key name="first-run" type="b">
       <default>true</default>
       <summary>Whether it's the very first run of GNOME Software</summary>
diff --git a/src/gs-update-monitor.c b/src/gs-update-monitor.c
index ee3d867..5d11b72 100644
--- a/src/gs-update-monitor.c
+++ b/src/gs-update-monitor.c
@@ -337,6 +337,7 @@ static void
 check_updates (GsUpdateMonitor *monitor)
 {
        gint64 tmp;
+       gboolean refresh_on_metered;
        g_autoptr(GDateTime) last_refreshed = NULL;
        g_autoptr(GDateTime) now_refreshed = NULL;
 
@@ -344,8 +345,14 @@ check_updates (GsUpdateMonitor *monitor)
        if (monitor->network_monitor == NULL)
                return;
 
-       /* never refresh when offline or on mobile connections */
-       if (!g_network_monitor_get_network_available (monitor->network_monitor) ||
+       /* never check for updates when offline */
+       if (!g_network_monitor_get_network_available (monitor->network_monitor))
+               return;
+
+       refresh_on_metered = g_settings_get_boolean (monitor->settings,
+                                                    "refresh-when-metered");
+
+       if (!refresh_on_metered &&
            g_network_monitor_get_network_metered (monitor->network_monitor))
                return;