[evolution] Bug 781122 - Option to Download messages for offline on each Send/Receive

[Milan Crha <mcrha src gnome org>]

commit 0d1aceebf5788af2e6efc8cae3dda96b2c75659a
Author: Milan Crha <mcrha redhat com>
Date:   Thu Oct 25 14:02:00 2018 +0200

    Bug 781122 - Option to Download messages for offline on each Send/Receive
    
    Closes https://bugzilla.gnome.org/show_bug.cgi?id=781122

 data/org.gnome.evolution.mail.gschema.xml.in |  5 ++
 src/mail/mail-send-recv.c                    | 69 ++++++++++++++++++++++++++++
 src/mail/mail.error.xml                      |  4 +-
 src/modules/mail/e-mail-shell-view-actions.c |  1 +
 4 files changed, 77 insertions(+), 2 deletions(-)
---
diff --git a/data/org.gnome.evolution.mail.gschema.xml.in b/data/org.gnome.evolution.mail.gschema.xml.in
index 44c9ba7825..a9e0e2c852 100644
--- a/data/org.gnome.evolution.mail.gschema.xml.in
+++ b/data/org.gnome.evolution.mail.gschema.xml.in
@@ -803,6 +803,11 @@
       <_summary>Where to lookup recipient S/MIME certificates or PGP keys when encrypting 
messages.</_summary>
       <_description>The “off” value completely disables certificate lookup; the “autocompleted” value 
provides certificates only for auto-completed contacts; the “books” value uses certificates from 
auto-completed contacts and searches in books marked for auto-completion.</_description>
     </key>
+    <key name="send-receive-downloads-for-offline" type="b">
+      <default>false</default>
+      <_summary>Whether Send/Receive should also download of messages for offline.</_summary>
+      <_description>If enabled, whenever Send/Receive is run it also runs synchronization of messages for 
offline use. The option is disabled by default.</_description>
+    </key>
 
     <!-- The following keys are deprecated. -->
 
diff --git a/src/mail/mail-send-recv.c b/src/mail/mail-send-recv.c
index 3fe9595f18..402e8b4246 100644
--- a/src/mail/mail-send-recv.c
+++ b/src/mail/mail-send-recv.c
@@ -128,6 +128,7 @@ static gboolean     send_done (gpointer data, const GError *error, const GPtrArray *
 
 static struct _send_data *send_data = NULL;
 static GtkWidget *send_recv_dialog = NULL;
+static GSList *glob_ongoing_downsyncs = NULL; /* CamelService *, those where downsync for offline is ongoing 
*/
 
 static void
 free_folder_info (struct _folder_info *info)
@@ -1046,6 +1047,60 @@ receive_status (CamelFilterDriver *driver,
        }
 }
 
+static void
+free_downsync_for_store_data (gpointer ptr)
+{
+       CamelService *service = ptr;
+
+       if (!service)
+               return;
+
+       glob_ongoing_downsyncs = g_slist_remove (glob_ongoing_downsyncs, service);
+
+       g_clear_object (&service);
+}
+
+static void
+downsync_for_store_thread (EAlertSinkThreadJobData *job_data,
+                          gpointer user_data,
+                          GCancellable *cancellable,
+                          GError **error)
+{
+       CamelOfflineStore *offline_store = user_data;
+
+       g_return_if_fail (CAMEL_IS_OFFLINE_STORE (offline_store));
+
+       camel_offline_store_prepare_for_offline_sync (offline_store, cancellable, error);
+}
+
+static void
+run_downsync_for_store (CamelService *service)
+{
+       EShellView *shell_view;
+       EActivity *activity;
+       gchar *description;
+
+       shell_view = mail_send_receive_get_mail_shell_view ();
+       if (!shell_view)
+               return;
+
+       glob_ongoing_downsyncs = g_slist_prepend (glob_ongoing_downsyncs, service);
+
+       description = g_strdup_printf (_("Preparing account “%s” for offline"), 
camel_service_get_display_name (service));
+
+       activity = e_shell_view_submit_thread_job (shell_view, description,
+               "mail:prepare-for-offline",
+               camel_service_get_display_name (service),
+               downsync_for_store_thread, g_object_ref (service),
+               free_downsync_for_store_data);
+
+       if (!activity)
+               glob_ongoing_downsyncs = g_slist_remove (glob_ongoing_downsyncs, service);
+
+       g_clear_object (&activity);
+       g_free (description);
+}
+
 /* when receive/send is complete */
 static void
 receive_done (gpointer data)
@@ -1126,6 +1181,20 @@ receive_done (gpointer data)
                free_send_data ();
        }
 
+       if (info->state != SEND_CANCELLED &&
+           CAMEL_IS_OFFLINE_STORE (info->service) &&
+           camel_offline_store_get_online (CAMEL_OFFLINE_STORE (info->service)) &&
+           !g_slist_find (glob_ongoing_downsyncs, info->service)) {
+               GSettings *settings;
+
+               settings = e_util_ref_settings ("org.gnome.evolution.mail");
+               if (g_settings_get_boolean (settings, "send-receive-downloads-for-offline") &&
+                   camel_offline_store_requires_downsync (CAMEL_OFFLINE_STORE (info->service))) {
+                       run_downsync_for_store (info->service);
+               }
+               g_object_unref (settings);
+       }
+
        free_send_info (info);
 }
 
diff --git a/src/mail/mail.error.xml b/src/mail/mail.error.xml
index 5f8b378b4b..f676d6ca6c 100644
--- a/src/mail/mail.error.xml
+++ b/src/mail/mail.error.xml
@@ -536,8 +536,8 @@ in the folder will be available in offline mode.</_secondary>
   </error>
 
   <error id="prepare-for-offline" type="warning">
-    <_primary>Failed to download messages for offline viewing.</_primary>
-    <_secondary>The reported error was “{0}”.</_secondary>
+    <_primary>Failed to download messages for offline viewing for account “{0}”.</_primary>
+    <_secondary>The reported error was “{1}”.</_secondary>
   </error>
 
   <error id="save-messages" type="error">
diff --git a/src/modules/mail/e-mail-shell-view-actions.c b/src/modules/mail/e-mail-shell-view-actions.c
index 0038f07b37..5642969fcb 100644
--- a/src/modules/mail/e-mail-shell-view-actions.c
+++ b/src/modules/mail/e-mail-shell-view-actions.c
@@ -309,6 +309,7 @@ action_mail_download_finished_cb (CamelStore *store,
        } else if (error != NULL) {
                e_alert_submit (
                        alert_sink, "mail:prepare-for-offline",
+                       camel_service_get_display_name (CAMEL_SERVICE (store)),
                        error->message, NULL);
                g_error_free (error);
        }