[gnome-software] updates: Show the time we last checked for updates

[Kalev Lember <klember src gnome org>]

commit 4f4d04df3cf7cbceb31ce45e297930ee2e09d74e
Author: Kalev Lember <kalevlember gmail com>
Date:   Mon Mar 3 13:17:54 2014 +0100

    updates: Show the time we last checked for updates
    
    This adds a label with 'Last checked: HH:MM' towards the bottom of the
    "has no updates" page.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725165

 configure.ac           |    1 +
 src/Makefile.am        |    1 +
 src/gnome-software.ui  |   42 +++++++++++++++-------
 src/gs-shell-updates.c |   91 ++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 122 insertions(+), 13 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a4cc64f..c62e81d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,6 +78,7 @@ PKG_CHECK_MODULES(SQLITE, sqlite3)
 PKG_CHECK_MODULES(NOTIFY, libnotify)
 PKG_CHECK_MODULES(SOUP, libsoup-2.4)
 PKG_CHECK_MODULES(GSETTINGS_DESKTOP_SCHEMAS, gsettings-desktop-schemas >= 3.11.5)
+PKG_CHECK_MODULES(GNOME_DESKTOP, gnome-desktop-3.0)
 AC_ARG_ENABLE(man,
               [AS_HELP_STRING([--enable-man],
                               [generate man pages [default=auto]])],,
diff --git a/src/Makefile.am b/src/Makefile.am
index 258d59d..42ec26f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -7,6 +7,7 @@ AM_CPPFLAGS =                                           \
        $(SOUP_CFLAGS)                                  \
        $(PACKAGEKIT_CFLAGS)                            \
        $(NOTIFY_CFLAGS)                                \
+       $(GNOME_DESKTOP_CFLAGS)                         \
        -DG_LOG_DOMAIN=\"Gs\"                           \
        -DI_KNOW_THE_PACKAGEKIT_GLIB2_API_IS_SUBJECT_TO_CHANGE  \
        -DGS_MODULESETDIR=\"$(datadir)/gnome-software/modulesets.d\" \
diff --git a/src/gnome-software.ui b/src/gnome-software.ui
index 1d58367..4fc826f 100644
--- a/src/gnome-software.ui
+++ b/src/gnome-software.ui
@@ -917,31 +917,47 @@
                   <object class="GtkBox" id="updates_uptodate_box">
                     <property name="visible">True</property>
                     <property name="orientation">vertical</property>
-                    <property name="spacing">12</property>
-                    <property name="halign">center</property>
-                    <property name="valign">center</property>
+                    <property name="spacing">48</property>
                     <property name="hexpand">True</property>
                     <property name="vexpand">True</property>
                     <style>
                       <class name="dim-label"/>
                     </style>
-                    <child>
-                      <object class="GtkImage" id="image_updates">
+                    <child type="center">
+                      <object class="GtkBox" id="updates_uptodate_centerbox">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="pixel_size">128</property>
-                        <property name="icon_name">object-select-symbolic</property>
+                        <property name="orientation">vertical</property>
+                        <property name="spacing">12</property>
+                        <child>
+                          <object class="GtkImage" id="image_updates">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="pixel_size">128</property>
+                            <property name="icon_name">object-select-symbolic</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkLabel" id="label10">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="label" translatable="yes">Software is up to date</property>
+                            <attributes>
+                              <attribute name="scale" value="1.4"/>
+                            </attributes>
+                          </object>
+                        </child>
                       </object>
                     </child>
                     <child>
-                      <object class="GtkLabel" id="label10">
+                      <object class="GtkLabel" id="label_updates_last_checked">
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
-                        <property name="label" translatable="yes">Software is up to date</property>
-                        <attributes>
-                          <attribute name="scale" value="1.4"/>
-                        </attributes>
+                        <property name="margin_bottom">32</property>
+                        <property name="label">Last checked: HH:MM</property>
                       </object>
+                      <packing>
+                        <property name="pack_type">end</property>
+                      </packing>
                     </child>
                   </object>
                   <packing>
diff --git a/src/gs-shell-updates.c b/src/gs-shell-updates.c
index 2c596ae..c011a47 100644
--- a/src/gs-shell-updates.c
+++ b/src/gs-shell-updates.c
@@ -32,6 +32,8 @@
 #include "gs-markdown.h"
 #include "gs-update-dialog.h"
 
+#include <gdesktop-enums.h>
+#include <langinfo.h>
 /* this isn't ideal, as PK should be abstracted away in a plugin, but
  * GNetworkMonitor doesn't provide us with a connection type */
 #include <packagekit-glib2/packagekit.h>
@@ -57,6 +59,8 @@ struct GsShellUpdatesPrivate
        GtkBuilder              *builder;
        GCancellable            *cancellable;
        GCancellable            *cancellable_refresh;
+       GSettings               *settings;
+       GSettings               *desktop_settings;
        GtkListBox              *list_box_updates;
        gboolean                 cache_valid;
        GsShell                 *shell;
@@ -64,6 +68,7 @@ struct GsShellUpdatesPrivate
        PkControl               *control;
        GsShellUpdatesState      state;
        gboolean                 has_agreed_to_mobile_data;
+       gboolean                 ampm_available;
 };
 
 enum {
@@ -84,6 +89,68 @@ gs_shell_updates_invalidate (GsShellUpdates *shell_updates)
        shell_updates->priv->cache_valid = FALSE;
 }
 
+static GDateTime *
+time_next_midnight (void)
+{
+       GDateTime *now;
+       GDateTime *next_midnight;
+       GTimeSpan since_midnight;
+
+       now = g_date_time_new_now_local ();
+       since_midnight = g_date_time_get_hour (now) * G_TIME_SPAN_HOUR +
+                        g_date_time_get_minute (now) * G_TIME_SPAN_MINUTE +
+                        g_date_time_get_second (now) * G_TIME_SPAN_SECOND +
+                        g_date_time_get_microsecond (now);
+       next_midnight = g_date_time_add (now, G_TIME_SPAN_DAY - since_midnight);
+       g_date_time_unref (now);
+
+       return next_midnight;
+}
+
+static gchar *
+gs_shell_updates_last_checked_time_string (GsShellUpdates *shell_updates)
+{
+       GsShellUpdatesPrivate *priv = shell_updates->priv;
+       GDesktopClockFormat clock_format;
+       GDateTime *last_checked;
+       GDateTime *midnight;
+       const gchar *format_string;
+       gchar *time_string;
+       gboolean use_24h_time;
+       gint64 tmp;
+       gint days_ago;
+
+       g_settings_get (priv->settings, "check-timestamp", "x", &tmp);
+       last_checked = g_date_time_new_from_unix_local (tmp);
+
+       midnight = time_next_midnight ();
+       days_ago = g_date_time_difference (midnight, last_checked) / G_TIME_SPAN_DAY;
+
+       clock_format = g_settings_get_enum (priv->desktop_settings, "clock-format");
+       use_24h_time = (clock_format == G_DESKTOP_CLOCK_FORMAT_24H || priv->ampm_available == FALSE);
+
+       if (days_ago < 1) { // today
+               if (use_24h_time) {
+                       /* TRANSLATORS: Time in 24h format */
+                       format_string = _("%R");
+               } else {
+                       /* TRANSLATORS: Time in 12h format */
+                       format_string = _("%l:%M %p");
+               }
+       } else {
+               /* TRANSLATORS: This is the date string with: day number, month name, year.
+                  i.e. "25 May 2012" */
+               format_string = _("%e %B %Y");
+       }
+
+       time_string = g_date_time_format (last_checked, format_string);
+
+       g_date_time_unref (last_checked);
+       g_date_time_unref (midnight);
+
+       return time_string;
+}
+
 /**
  * gs_shell_updates_update_ui_state:
  **/
@@ -256,6 +323,20 @@ gs_shell_updates_update_ui_state (GsShellUpdates *shell_updates)
                g_assert_not_reached ();
                break;
        }
+
+       /* last checked label */
+       if (g_strcmp0 (gtk_stack_get_visible_child_name (GTK_STACK (widget)), "uptodate") == 0) {
+               gchar *last_checked;
+
+               tmp = gs_shell_updates_last_checked_time_string (shell_updates);
+               /* TRANSLATORS: This is the time when we last checked for updates */
+               last_checked = g_strdup_printf (_("Last checked: %s"), tmp);
+               g_free (tmp);
+
+               widget = GTK_WIDGET (gtk_builder_get_object (priv->builder, "label_updates_last_checked"));
+               gtk_label_set_label (GTK_LABEL (widget), last_checked);
+               g_free (last_checked);
+       }
 }
 
 /**
@@ -932,10 +1013,18 @@ gs_shell_updates_class_init (GsShellUpdatesClass *klass)
 static void
 gs_shell_updates_init (GsShellUpdates *shell_updates)
 {
+       const char *ampm;
+
        shell_updates->priv = GS_SHELL_UPDATES_GET_PRIVATE (shell_updates);
        shell_updates->priv->control = pk_control_new ();
        shell_updates->priv->cancellable_refresh = g_cancellable_new ();
        shell_updates->priv->state = GS_SHELL_UPDATES_STATE_STARTUP;
+       shell_updates->priv->settings = g_settings_new ("org.gnome.software");
+       shell_updates->priv->desktop_settings = g_settings_new ("org.gnome.desktop.interface");
+
+       ampm = nl_langinfo (AM_STR);
+       if (ampm != NULL && *ampm != '\0')
+               shell_updates->priv->ampm_available = TRUE;
 }
 
 /**
@@ -954,6 +1043,8 @@ gs_shell_updates_finalize (GObject *object)
        g_object_unref (priv->plugin_loader);
        g_object_unref (priv->cancellable);
        g_object_unref (priv->control);
+       g_object_unref (priv->settings);
+       g_object_unref (priv->desktop_settings);
 
        G_OBJECT_CLASS (gs_shell_updates_parent_class)->finalize (object);
 }