From 5fb6123a57d48fc78f06a6624c85e02baa037565 Mon Sep 17 00:00:00 2001
From: Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
Date: Mon, 30 Mar 2015 13:40:10 -0300
Subject: [PATCH] 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 file changed, 79 insertions(+), 9 deletions(-)

diff --git a/src/gcal-source-dialog.c b/src/gcal-source-dialog.c
index 4563dd42..520c7429 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)
 {