[gnome-calendar/calendar-editor] source-dialog: try to list sources at the given server

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 2676f9cd3b95aebe4cf8f2f34ec3946bc34689c1
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Mar 30 13:40:10 2015 -0300

    source-dialog: try to list sources at the given server
    
    Before anything, it doesn't work properly yet.
    It uses the new family of functions provided by
    EDS to discover the event sources from the given
    URL.

 src/gcal-source-dialog.c |   88 +++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 79 insertions(+), 9 deletions(-)
---
diff --git a/src/gcal-source-dialog.c b/src/gcal-source-dialog.c
index 4563dd4..520c742 100644
--- a/src/gcal-source-dialog.c
+++ b/src/gcal-source-dialog.c
@@ -22,6 +22,7 @@
 #include "gcal-utils.h"
 
 #include <glib/gi18n.h>
+#include <libedataserverui/libedataserverui.h>
 
 typedef struct
 {
@@ -113,6 +114,10 @@ static void       url_entry_text_changed                (GObject             *ob
 
 static gboolean   validate_url_cb                       (GcalSourceDialog    *dialog);
 
+static void       discover_sources_cb                   (GObject             *source,
+                                                         GAsyncResult        *result,
+                                                         gpointer             user_data);
+
 G_DEFINE_TYPE_WITH_PRIVATE (GcalSourceDialog, gcal_source_dialog, GTK_TYPE_DIALOG)
 
 /**
@@ -397,7 +402,7 @@ setup_source_details (GcalSourceDialog *dialog,
     gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (priv->details_frame)), priv->details_frame);
 
   /* Add it to the current grid */
-  gtk_grid_attach (GTK_GRID (parent_grid), priv->details_frame, 0, 2, 1, 2);
+  gtk_grid_attach (GTK_GRID (parent_grid), priv->details_frame, 0, 2, 2, 2);
 
   /* Calendar name */
   gtk_entry_set_text (GTK_ENTRY (priv->new_calendar_name_entry), e_source_get_display_name (source));
@@ -520,9 +525,6 @@ validate_url_cb (GcalSourceDialog *dialog)
   if (host == NULL || !uri_valid)
     goto out;
 
-  // Pulse the entry while it performs the check
-  priv->calendar_address_id = g_timeout_add (ENTRY_PROGRESS_TIMEOUT, (GSourceFunc) pulse_web_entry, dialog);
-
   /**
    * Create the new source and add the needed
    * extensions.
@@ -541,13 +543,30 @@ validate_url_cb (GcalSourceDialog *dialog)
   webdav = e_source_get_extension (source, E_SOURCE_EXTENSION_WEBDAV_BACKEND);
   e_source_webdav_set_resource_path (webdav, path);
 
-  /* Set the private source so it saves at closing */
-  priv->remote_source = source;
+  /*
+   * If we're dealing with an absolute file path,
+   * there is no need to check the server for more
+   * sources.
+   */
+  if (g_str_has_suffix (path, ".ics"))
+    {
+      // Set the private source so it saves at closing
+      priv->remote_source = source;
 
-  /* Update buttons */
-  gtk_widget_set_sensitive (priv->add_button, source != NULL);
+      // Update buttons
+      gtk_widget_set_sensitive (priv->add_button, source != NULL);
+      setup_source_details (dialog, source);
+    }
+  else
+    {
+      // Pulse the entry while it performs the check
+      priv->calendar_address_id = g_timeout_add (ENTRY_PROGRESS_TIMEOUT, (GSourceFunc) pulse_web_entry, 
dialog);
+
+      // Search for possible sources from the set host/path
+      e_webdav_discover_sources (source, gtk_entry_get_text (GTK_ENTRY (priv->calendar_address_entry)),
+                                 E_WEBDAV_DISCOVER_SUPPORTS_EVENTS, NULL, NULL, discover_sources_cb, dialog);
+    }
 
-  setup_source_details (dialog, source);
 out:
   if (host)
     g_free (host);
@@ -558,6 +577,57 @@ out:
   return FALSE;
 }
 
+static void
+discover_sources_cb (GObject      *source,
+                     GAsyncResult *result,
+                     gpointer      user_data)
+{
+  GcalSourceDialogPrivate *priv = GCAL_SOURCE_DIALOG (user_data)->priv;
+  EWebDAVDiscoveredSource *src;
+  GSList *discovered_sources, *user_adresses, *aux;
+  GError *error;
+  gint n_sources;
+
+  error = NULL;
+
+  // Stop the pulsing entry
+  if (priv->calendar_address_id != 0)
+    {
+      gtk_entry_set_progress_fraction (GTK_ENTRY (priv->calendar_address_entry), 0);
+      g_source_remove (priv->calendar_address_id);
+      priv->calendar_address_id = 0;
+    }
+
+  if (!e_webdav_discover_sources_finish (E_SOURCE (source), result, NULL, NULL, &discovered_sources, 
&user_adresses,
+                                        &error))
+    {
+      g_debug ("[source-dialog] error parsing source: %s", error->message);
+      g_error_free (error);
+      return;
+    }
+
+  n_sources = g_slist_length (discovered_sources);
+
+  if (n_sources > 1)
+    {
+      /* TODO: show a list of calendars */
+    }
+  else if (n_sources == 1)
+    {
+      src = discovered_sources->data;
+
+      g_message ("Discovered source '%s' at '%s'", src->display_name, src->href);
+    }
+  /* Update buttons */
+  //gtk_widget_set_sensitive (priv->add_button, source != NULL);
+
+  //setup_source_details (dialog, source);
+
+  // Free things up
+  e_webdav_discover_free_discovered_sources (discovered_sources);
+  g_slist_free_full (user_adresses, g_free);
+}
+
 GcalSourceDialog *
 gcal_source_dialog_new (void)
 {