[evolution/wip/webkit2] Bug 702707 - Follow up flags is not displayed when reading message

[Milan Crha <mcrha src gnome org>]

commit edffe6af745889d841d25792f46f521dc557305d
Author: Milan Crha <mcrha redhat com>
Date:   Wed Apr 22 13:28:33 2015 +0200

    Bug 702707 - Follow up flags is not displayed when reading message

 mail/e-mail-reader.c |  102 +++++++++++++++++++++++++++++++++++++++++++++++++-
 mail/mail.error.xml  |   20 +++++++++-
 2 files changed, 120 insertions(+), 2 deletions(-)
---
diff --git a/mail/e-mail-reader.c b/mail/e-mail-reader.c
index 8eb2220..c6e9eff 100644
--- a/mail/e-mail-reader.c
+++ b/mail/e-mail-reader.c
@@ -97,6 +97,8 @@ struct _EMailReaderPrivate {
        guint schedule_mark_seen_interval;
 
        gpointer remote_content_alert; /* EAlert */
+
+       gpointer followup_alert; /* weak pointer to an EAlert */
 };
 
 enum {
@@ -2884,6 +2886,94 @@ discard_timeout_mark_seen_cb (EMailReader *reader)
 }
 
 static void
+mail_reader_remove_followup_alert (EMailReader *reader)
+{
+       EMailReaderPrivate *priv;
+
+       g_return_if_fail (E_IS_MAIL_READER (reader));
+
+       priv = E_MAIL_READER_GET_PRIVATE (reader);
+       if (!priv)
+               return;
+
+       if (priv->followup_alert)
+               e_alert_response (priv->followup_alert, GTK_RESPONSE_OK);
+}
+
+static void
+mail_reader_manage_followup_flag (EMailReader *reader,
+                                 CamelFolder *folder,
+                                 const gchar *message_uid)
+{
+       EMailReaderPrivate *priv;
+       CamelMessageInfo *info;
+       const gchar *followup, *completed_on, *due_by;
+       time_t date;
+       gchar *date_str = NULL;
+       gboolean alert_added = FALSE;
+
+       g_return_if_fail (E_IS_MAIL_READER (reader));
+       g_return_if_fail (CAMEL_IS_FOLDER (folder));
+       g_return_if_fail (message_uid != NULL);
+
+       priv = E_MAIL_READER_GET_PRIVATE (reader);
+       if (!priv)
+               return;
+
+       info = camel_folder_get_message_info (folder, message_uid);
+       if (!info)
+               return;
+
+       followup = camel_message_info_user_tag (info, "follow-up");
+       if (followup && *followup) {
+               EPreviewPane *preview_pane;
+               const gchar *alert_tag;
+               EAlert *alert;
+
+               completed_on = camel_message_info_user_tag (info, "completed-on");
+               due_by = camel_message_info_user_tag (info, "due-by");
+
+               if (completed_on && *completed_on) {
+                       alert_tag = "mail:follow-up-completed-info";
+                       date = camel_header_decode_date (completed_on, NULL);
+                       date_str = e_datetime_format_format ("mail", "header", DTFormatKindDateTime, date);
+               } else if (due_by && *due_by) {
+                       time_t now;
+
+                       alert_tag = "mail:follow-up-dueby-info";
+                       date = camel_header_decode_date (due_by, NULL);
+                       date_str = e_datetime_format_format ("mail", "header", DTFormatKindDateTime, date);
+
+                       now = time (NULL);
+                       if (now > date)
+                               alert_tag = "mail:follow-up-overdue-error";
+               } else {
+                       alert_tag = "mail:follow-up-flag-info";
+               }
+
+               alert = e_alert_new (alert_tag, followup, date_str ? date_str : "???", NULL);
+
+               g_free (date_str);
+
+               preview_pane = e_mail_reader_get_preview_pane (reader);
+               e_alert_sink_submit_alert (E_ALERT_SINK (preview_pane), alert);
+
+               alert_added = TRUE;
+
+               mail_reader_remove_followup_alert (reader);
+               priv->followup_alert = alert;
+               g_object_add_weak_pointer (G_OBJECT (priv->followup_alert), &priv->followup_alert);
+
+               g_object_unref (alert);
+       }
+
+       camel_message_info_unref (info);
+
+       if (!alert_added)
+               mail_reader_remove_followup_alert (reader);
+}
+
+static void
 mail_reader_message_loaded_cb (CamelFolder *folder,
                                GAsyncResult *result,
                                EMailReaderClosure *closure)
@@ -2926,10 +3016,13 @@ mail_reader_message_loaded_cb (CamelFolder *folder,
                goto exit;
        }
 
-       if (message != NULL)
+       if (message != NULL) {
+               mail_reader_manage_followup_flag (reader, folder, message_uid);
+
                g_signal_emit (
                        reader, signals[MESSAGE_LOADED], 0,
                        message_uid, message);
+       }
 
 exit:
        if (error != NULL) {
@@ -4271,9 +4364,16 @@ connect_signals:
 void
 e_mail_reader_changed (EMailReader *reader)
 {
+       MessageList *message_list;
+
        g_return_if_fail (E_IS_MAIL_READER (reader));
 
        g_signal_emit (reader, signals[CHANGED], 0);
+
+       message_list = MESSAGE_LIST (e_mail_reader_get_message_list (reader));
+
+       if (!message_list || message_list_selected_count (message_list) != 1)
+               mail_reader_remove_followup_alert (reader);
 }
 
 guint32
diff --git a/mail/mail.error.xml b/mail/mail.error.xml
index ec81430..731af24 100644
--- a/mail/mail.error.xml
+++ b/mail/mail.error.xml
@@ -573,5 +573,23 @@ in the folder will be available in offline mode.</_secondary>
     <_primary>Remote content download had been blocked for this message.</_primary>
     <_secondary>You can download remote content manually, or set to remember to download remote content for 
this sender or used sites.</_secondary>
   </error>
-</error-list>
 
+  <error id="follow-up-flag-info" type="info">
+    <secondary>{0}</secondary>
+  </error>
+
+  <error id="follow-up-completed-info" type="info">
+    <!-- Translators: This constructs a string like "Follow-up, Completed on Tuesday, January 13, 2009" -->
+    <_secondary>{0}, Completed on {1}</_secondary>
+  </error>
+
+  <error id="follow-up-dueby-info" type="info">
+    <!-- Translators: This constructs a string like "Follow-up by Tuesday, January 13, 2009" -->
+    <_secondary>{0} by {1}</_secondary>
+  </error>
+
+  <error id="follow-up-overdue-error" type="error">
+    <!-- Translators: This constructs a string like "Overdue: Follow-up by Tuesday, January 13, 2009" -->
+    <_primary>Overdue: {0} by {1}</_primary>
+  </error>
+</error-list>