path: root/plugins/publish-calendar/publish-calendar.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      David Trowbridge <trowbrds@cs.colorado.edu>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <string.h>
#include <gtk/gtk.h>
#include <gconf/gconf-client.h>
#include <glib/gi18n.h>
#include <gio/gio.h>
#include <libedataserver/e-url.h>
#include <libedataserverui/e-passwords.h>
#include <calendar/gui/e-cal-config.h>
#include <shell/es-event.h>
#include <e-util/e-util.h>
#include <e-util/e-util-private.h>
#include <e-util/e-dialog-utils.h>

#include <shell/e-shell.h>
#include <shell/e-shell-view.h>

#include "url-editor-dialog.h"
#include "publish-format-fb.h"
#include "publish-format-ical.h"

static GtkListStore *store = NULL;
static GHashTable *uri_timeouts = NULL;
static GSList *publish_uris = NULL;
static GSList *queued_publishes = NULL;
static gint online = 0;

static GSList *error_queue = NULL;
static GStaticMutex error_queue_lock = G_STATIC_MUTEX_INIT;
static guint error_queue_show_idle_id = 0;
static void  error_queue_add (gchar *descriptions, GError *error);

gint          e_plugin_lib_enable (EPlugin *ep, gint enable);
GtkWidget   *publish_calendar_locations (EPlugin *epl, EConfigHookItemFactoryData *data);
static void  update_timestamp (EPublishUri *uri);
static void publish (EPublishUri *uri, gboolean can_report_success);

static void
publish_no_succ_info (EPublishUri *uri)
{
    publish (uri, FALSE);
}

static void
publish_uri_async (EPublishUri *uri)
{
    GThread *thread = NULL;
    GError *error = NULL;

    thread = g_thread_create ((GThreadFunc) publish_no_succ_info, uri, FALSE, &error);
    if (!thread) {
        g_warning (G_STRLOC ": %s", error->message);
        g_error_free (error);
    }
}

static void
publish_online (EPublishUri *uri, GFile *file, GError **perror, gboolean can_report_success)
{
    GOutputStream *stream;
    GError *error = NULL;

    stream = G_OUTPUT_STREAM (g_file_replace (file, NULL, FALSE, G_FILE_CREATE_NONE, NULL, &error));

    if (!stream || error) {
        if (stream)
            g_object_unref (stream);

        if (perror) {
            *perror = error;
        } else if (error) {

            error_queue_add (g_strdup_printf (_("Could not open %s:"), uri->location), error);
        } else {
            error_queue_add (g_strdup_printf (_("Could not open %s: Unknown error"), uri->location), NULL);
        }
        return;
    }

    switch (uri->publish_format) {
    case URI_PUBLISH_AS_ICAL:
        publish_calendar_as_ical (stream, uri, &error);
        break;
    case URI_PUBLISH_AS_FB:
        publish_calendar_as_fb (stream, uri, &error);
        break;
    /*
    case URI_PUBLISH_AS_HTML:
        publish_calendar_as_html (handle, uri);
        break;
    */
    }

    if (error)
        error_queue_add (g_strdup_printf (_("There was an error while publishing to %s:"), uri->location), error);
    else if (can_report_success)
        error_queue_add (g_strdup_printf (_("Publishing to %s finished successfully"), uri->location), NULL);

    update_timestamp (uri);

    g_output_stream_close (stream, NULL, NULL);
    g_object_unref (stream);
}

static void
unmount_done_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
    GError *error = NULL;

#if GLIB_CHECK_VERSION(2,21,3)
    g_mount_unmount_with_operation_finish (G_MOUNT (source_object), res, &error);
#else
    g_mount_unmount_finish (G_MOUNT (source_object), res, &error);
#endif

    if (error) {
        g_warning ("Unmount failed: %s", error->message);
        g_error_free (error);
    }

    g_object_unref (source_object);
}

struct mnt_struct {
    EPublishUri *uri;
    GFile *file;
    GMountOperation *mount_op;
    gboolean can_report_success;
};

static void
mount_ready_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
    struct mnt_struct *ms = (struct mnt_struct *) user_data;
    GError *error = NULL;
    GMount *mount;

    g_file_mount_enclosing_volume_finish (G_FILE (source_object), res, &error);

    if (error) {

        error_queue_add (g_strdup_printf (_("Mount of %s failed:"), ms->uri->location), error);

        if (ms)
            g_object_unref (ms->mount_op);
        g_free (ms);

        g_object_unref (source_object);

        return;
    }

    g_return_if_fail (ms != NULL);

    publish_online (ms->uri, ms->file, NULL, ms->can_report_success);

    g_object_unref (ms->mount_op);
    g_free (ms);

    mount = g_file_find_enclosing_mount (G_FILE (source_object), NULL, NULL);
    if (mount)
#if GLIB_CHECK_VERSION(2,21,3)
        g_mount_unmount_with_operation (mount, G_MOUNT_UNMOUNT_NONE, NULL, NULL, unmount_done_cb, NULL);
#else
        g_mount_unmount (mount, G_MOUNT_UNMOUNT_NONE, NULL, unmount_done_cb, NULL);
#endif

    g_object_unref (source_object);
}

static void
ask_password (GMountOperation *op, const gchar *message, const gchar *default_user, const gchar *default_domain, GAskPasswordFlags flags, gpointer user_data)
{
    struct mnt_struct *ms = (struct mnt_struct *) user_data;
    gchar *username, *password;
    gboolean req_pass = FALSE;
    EUri *euri;

    g_return_if_fail (ms != NULL);

    /* we can ask only for a password */
    if ((flags & G_ASK_PASSWORD_NEED_PASSWORD) == 0)
        return;

    euri = e_uri_new (ms->uri->location);
    username = euri->user;
    password = e_passwords_get_password ("Calendar", ms->uri->location);
    req_pass = ((username && *username) && !(ms->uri->service_type == TYPE_ANON_FTP &&
            !strcmp (username, "anonymous"))) ? TRUE:FALSE;

    if (!password && req_pass) {
        gboolean remember = FALSE;

        password = e_passwords_ask_password (_("Enter password"), "", ms->uri->location, message,
                         E_PASSWORDS_REMEMBER_FOREVER|E_PASSWORDS_SECRET|E_PASSWORDS_ONLINE,
                         &remember,
                         NULL);

        if (!password) {
            /* user canceled password dialog */
            g_mount_operation_reply (op, G_MOUNT_OPERATION_ABORTED);
            e_uri_free (euri);

            return;
        }
    }

    if (!req_pass)
        g_mount_operation_set_anonymous (op, TRUE);
    else {
        g_mount_operation_set_anonymous (op, FALSE);
        g_mount_operation_set_username  (op, username);
        g_mount_operation_set_password  (op, password);
    }

    g_mount_operation_reply (op, G_MOUNT_OPERATION_HANDLED);

    e_uri_free (euri);
}

static void
ask_question (GMountOperation *op, const gchar *message, const gchar *choices[])
{
    /* this has been stolen from file-chooser */
    GtkWidget *dialog;
    gint cnt, len;
    gchar *primary;
    const gchar *secondary = NULL;
    gint res;

    primary = strstr (message, "\n");
    if (primary) {
        secondary = primary + 1;
        primary = g_strndup (message, strlen (message) - strlen (primary));
    }

    gdk_threads_enter ();
    dialog = gtk_message_dialog_new (NULL,
                     0, GTK_MESSAGE_QUESTION,
                     GTK_BUTTONS_NONE, "%s", primary);
    g_free (primary);

    if (secondary) {
        gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
                              "%s", secondary);
    }

    if (choices) {
        /* First count the items in the list then
         * add the buttons in reverse order */
        for (len = 0; choices[len] != NULL; len++) {
            ;
        }

        for (cnt = len - 1; cnt >= 0; cnt--) {
            gtk_dialog_add_button (GTK_DIALOG (dialog), choices[cnt], cnt);
        }
    }

    res = gtk_dialog_run (GTK_DIALOG (dialog));
    if (res >= 0) {
        g_mount_operation_set_choice (op, res);
        g_mount_operation_reply (op, G_MOUNT_OPERATION_HANDLED);
    } else {
        g_mount_operation_reply (op, G_MOUNT_OPERATION_ABORTED);
    }

    gtk_widget_destroy (GTK_WIDGET (dialog));
    gdk_threads_leave ();
}

static void
mount_first (EPublishUri *uri, GFile *file, gboolean can_report_success)
{
    struct mnt_struct *ms = g_malloc (sizeof (struct mnt_struct));

    ms->uri = uri;
    ms->file = g_object_ref (file);
    ms->mount_op = g_mount_operation_new ();
    ms->can_report_success = can_report_success;

    g_signal_connect (ms->mount_op, "ask-password", G_CALLBACK (ask_password), ms);
    g_signal_connect (ms->mount_op, "ask-question", G_CALLBACK (ask_question), ms);

    g_file_mount_enclosing_volume (file, G_MOUNT_MOUNT_NONE, ms->mount_op, NULL, mount_ready_cb, ms);
}

static void
publish (EPublishUri *uri, gboolean can_report_success)
{
    if (online) {
        GError *error = NULL;
        GFile *file;

        if (g_slist_find (queued_publishes, uri))
            queued_publishes = g_slist_remove (queued_publishes, uri);

        if (!uri->enabled)
            return;

        file = g_file_new_for_uri (uri->location);

        g_return_if_fail (file != NULL);

        publish_online (uri, file, &error, can_report_success);

        if (error && error->domain == G_IO_ERROR && error->code == G_IO_ERROR_NOT_MOUNTED) {
            g_error_free (error);
            error = NULL;

            mount_first (uri, file, can_report_success);
        }

        if (error)
            error_queue_add (g_strdup_printf (_("Could not open %s:"), uri->location), error);

        g_object_unref (file);
    } else {
        if (g_slist_find (queued_publishes, uri) == NULL)
            queued_publishes = g_slist_prepend (queued_publishes, uri);
    }
}

typedef struct {
    GConfClient *gconf;
    GtkWidget   *treeview;
    GtkWidget   *url_add;
    GtkWidget   *url_edit;
    GtkWidget   *url_remove;
    GtkWidget   *url_enable;
} PublishUIData;

static void
add_timeout (EPublishUri *uri)
{
    guint id;

    /* Set the timeout for now+frequency */
    switch (uri->publish_frequency) {
    case URI_PUBLISH_DAILY:
        id = g_timeout_add_seconds (24 * 60 * 60, (GSourceFunc) publish, uri);
        g_hash_table_insert (uri_timeouts, uri, GUINT_TO_POINTER (id));
        break;
    case URI_PUBLISH_WEEKLY:
        id = g_timeout_add_seconds (7 * 24 * 60 * 60, (GSourceFunc) publish, uri);
        g_hash_table_insert (uri_timeouts, uri, GUINT_TO_POINTER (id));
        break;
    }
}

static void
update_timestamp (EPublishUri *uri)
{
    GConfClient *client;
    GSList *uris, *l;
    gchar *xml;
    guint id;

    /* Remove timeout if we have one */
    id = GPOINTER_TO_UINT (g_hash_table_lookup (uri_timeouts, uri));
    if (id) {
        g_source_remove (id);
        add_timeout (uri);
    }

    /* Update timestamp in gconf */
    xml = e_publish_uri_to_xml (uri);

    client = gconf_client_get_default ();
    uris = gconf_client_get_list (client, "/apps/evolution/calendar/publish/uris", GCONF_VALUE_STRING, NULL);
    for (l = uris; l; l = g_slist_next (l)) {
        gchar *d = l->data;
        if (strcmp (d, xml) == 0) {
            uris = g_slist_remove (uris, d);
            g_free (d);
            break;
        }
    }
    g_free (xml);

    if (uri->last_pub_time)
        g_free (uri->last_pub_time);
    uri->last_pub_time = g_strdup_printf ("%d", (gint) time (NULL));

    uris = g_slist_prepend (uris, e_publish_uri_to_xml (uri));

    gconf_client_set_list (client, "/apps/evolution/calendar/publish/uris", GCONF_VALUE_STRING, uris, NULL);

    g_slist_foreach (uris, (GFunc) g_free, NULL);
    g_slist_free (uris);
    g_object_unref (client);
}

static void
add_offset_timeout (EPublishUri *uri)
{
    guint id;
    time_t offset = atoi (uri->last_pub_time);
    time_t current = time (NULL);
    gint elapsed = current - offset;

    switch (uri->publish_frequency) {
    case URI_PUBLISH_DAILY:
        if (elapsed > 24 * 60 * 60) {
            publish (uri, FALSE);
            add_timeout (uri);
        } else {
            id = g_timeout_add_seconds (24 * 60 * 60 - elapsed, (GSourceFunc) publish, uri);
            g_hash_table_insert (uri_timeouts, uri, GUINT_TO_POINTER (id));
            break;
        }
        break;
    case URI_PUBLISH_WEEKLY:
        if (elapsed > 7 * 24 * 60 * 60) {
            publish (uri, FALSE);
            add_timeout (uri);
        } else {
            id = g_timeout_add_seconds (7 * 24 * 60 * 60 - elapsed, (GSourceFunc) publish, uri);
            g_hash_table_insert (uri_timeouts, uri, GUINT_TO_POINTER (id));
            break;
        }
        break;
    }
}

static void
url_list_changed (PublishUIData *ui)
{
    GtkTreeModel *model = NULL;
    GSList *url_list = NULL;
    GtkTreeIter iter;
    gboolean valid;
    GConfClient *client;

    url_list = NULL;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    valid = gtk_tree_model_get_iter_first (model, &iter);
    while (valid) {
        EPublishUri *url;
        gchar *xml;

        gtk_tree_model_get (model, &iter, URL_LIST_URL_COLUMN, &url, -1);

        if ((xml = e_publish_uri_to_xml (url)))
            url_list = g_slist_append (url_list, xml);

        valid = gtk_tree_model_iter_next (model, &iter);
    }
    client = gconf_client_get_default ();
    gconf_client_set_list (client, "/apps/evolution/calendar/publish/uris", GCONF_VALUE_STRING, url_list, NULL);
    g_slist_foreach (url_list, (GFunc) g_free, NULL);
    g_slist_free (url_list);
}

static void
update_url_enable_button (EPublishUri *url, GtkWidget *url_enable)
{
    g_return_if_fail (url != NULL);
    g_return_if_fail (url_enable != NULL);
    g_return_if_fail (GTK_IS_BUTTON (url_enable));

    gtk_button_set_label (GTK_BUTTON (url_enable), url->enabled ? _("_Disable") : _("E_nable"));
}

static void
url_list_enable_toggled (GtkCellRendererToggle *renderer,
                         const gchar            *path_string,
             PublishUIData         *ui)
{
    GtkTreeSelection *selection;
    EPublishUri *url = NULL;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;

    path = gtk_tree_path_new_from_string (path_string);
    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));

    if (gtk_tree_model_get_iter (model, &iter, path)) {
        gtk_tree_model_get (model, &iter, URL_LIST_URL_COLUMN, &url, -1);

        url->enabled = !url->enabled;

        update_url_enable_button (url, ui->url_enable);

        gtk_list_store_set (GTK_LIST_STORE (model), &iter, URL_LIST_ENABLED_COLUMN, url->enabled, -1);

        url_list_changed (ui);
    }

    gtk_tree_path_free (path);
}

static void
selection_changed (GtkTreeSelection *selection, PublishUIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    EPublishUri *url = NULL;

    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_tree_model_get (model, &iter, URL_LIST_URL_COLUMN, &url, -1);
        gtk_widget_set_sensitive (ui->url_edit, TRUE);
        gtk_widget_set_sensitive (ui->url_remove, TRUE);
        gtk_widget_set_sensitive (ui->url_enable, TRUE);

        update_url_enable_button (url, ui->url_enable);
    } else {
        gtk_widget_set_sensitive (ui->url_edit, FALSE);
        gtk_widget_set_sensitive (ui->url_remove, FALSE);
        gtk_widget_set_sensitive (ui->url_enable, FALSE);
    }
}

static void
url_add_clicked (GtkButton *button, PublishUIData *ui)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkWidget *url_editor;
    EPublishUri *uri;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (ui->treeview));
    url_editor = url_editor_dialog_new (model, NULL);

    if (url_editor_dialog_run ((UrlEditorDialog *) url_editor)) {
        uri = URL_EDITOR_DIALOG (url_editor)->uri;
        if (uri->location) {
            gtk_list_store_append (GTK_LIST_STORE (model), &iter);
            gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    URL_LIST_ENABLED_COLUMN, uri->enabled,
                    URL_LIST_LOCATION_COLUMN, uri->location,
                    URL_LIST_URL_COLUMN, uri, -1);
            url_list_changed (ui);
            publish_uris = g_slist_prepend (publish_uris, uri);
            add_timeout (uri);
            publish_uri_async (uri);
        } else {
            g_free (uri);
        }
    }
    gtk_widget_destroy (url_editor);
}

static void
url_edit_clicked (GtkButton *button, PublishUIData *ui)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        EPublishUri *uri;
        GtkWidget *url_editor;
        guint id;

        gtk_tree_model_get (GTK_TREE_MODEL (model), &iter, 2, &uri, -1);
        url_editor = url_editor_dialog_new (model, uri);

        if (url_editor_dialog_run ((UrlEditorDialog *) url_editor)) {
            gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    URL_LIST_ENABLED_COLUMN, uri->enabled,
                    URL_LIST_LOCATION_COLUMN, uri->location,
                    URL_LIST_URL_COLUMN, uri, -1);

            id = GPOINTER_TO_UINT (g_hash_table_lookup (uri_timeouts, uri));
            if (id)
                g_source_remove (id);
            add_timeout (uri);
            url_list_changed (ui);
            publish_uri_async (uri);
        }

        gtk_widget_destroy (url_editor);
    }
}

static void
url_list_double_click (GtkTreeView       *treeview,
               GtkTreePath       *path,
               GtkTreeViewColumn *column,
               PublishUIData     *ui)
{
    url_edit_clicked (NULL, ui);
}

static void
url_remove_clicked (GtkButton *button, PublishUIData *ui)
{
    EPublishUri *url = NULL;
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkWidget *confirm;
    gint response;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    gtk_tree_model_get (model, &iter, URL_LIST_URL_COLUMN, &url, -1);

    confirm = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                      GTK_MESSAGE_QUESTION, GTK_BUTTONS_NONE,
                      _("Are you sure you want to remove this location?"));
    gtk_dialog_add_button (GTK_DIALOG (confirm), GTK_STOCK_CANCEL, GTK_RESPONSE_NO);
    gtk_dialog_add_button (GTK_DIALOG (confirm), GTK_STOCK_REMOVE, GTK_RESPONSE_YES);
    gtk_dialog_set_default_response (GTK_DIALOG (confirm), GTK_RESPONSE_CANCEL);

    response = gtk_dialog_run (GTK_DIALOG (confirm));
    gtk_widget_destroy (confirm);

    if (response == GTK_RESPONSE_YES) {
        gint len;
        guint id;
        gtk_list_store_remove (GTK_LIST_STORE (model), &iter);

        len = gtk_tree_model_iter_n_children (model, NULL);
        if (len > 0) {
            gtk_tree_selection_select_iter (selection, &iter);
        } else {
            gtk_widget_set_sensitive (ui->url_edit, FALSE);
            gtk_widget_set_sensitive (ui->url_remove, FALSE);
            gtk_widget_set_sensitive (ui->url_enable, FALSE);
        }

        publish_uris = g_slist_remove (publish_uris, url);
        id = GPOINTER_TO_UINT (g_hash_table_lookup (uri_timeouts, url));
        if (id)
            g_source_remove (id);

        g_free (url);
        url_list_changed (ui);
    }
}

static void
url_enable_clicked (GtkButton *button, PublishUIData *ui)
{
    EPublishUri *url = NULL;
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_tree_model_get (model, &iter, URL_LIST_URL_COLUMN, &url, -1);
        url->enabled = !url->enabled;

        update_url_enable_button (url, ui->url_enable);

        gtk_list_store_set (GTK_LIST_STORE (model), &iter, URL_LIST_ENABLED_COLUMN, url->enabled, -1);
        gtk_tree_selection_select_iter (selection, &iter);
        url_list_changed (ui);
    }
}

static void
online_state_changed (EShell *shell)
{
    online = e_shell_get_online (shell);
    if (online)
        while (queued_publishes)
            publish (queued_publishes->data, FALSE);
}

GtkWidget *
publish_calendar_locations (EPlugin *epl, EConfigHookItemFactoryData *data)
{
    GtkBuilder *builder;
    GtkCellRenderer *renderer;
    GtkTreeSelection *selection;
    GtkWidget *toplevel;
    PublishUIData *ui = g_new0 (PublishUIData, 1);
    GSList *l;
    GtkTreeIter iter;
    GConfClient *client;

    builder = gtk_builder_new ();
    e_load_ui_builder_definition (builder, "publish-calendar.ui");

    ui->treeview = e_builder_get_widget (builder, "url list");
    if (store == NULL)
        store = gtk_list_store_new (URL_LIST_N_COLUMNS, G_TYPE_BOOLEAN, G_TYPE_STRING, G_TYPE_POINTER);
    else
        gtk_list_store_clear (store);

    gtk_tree_view_set_model (GTK_TREE_VIEW (ui->treeview), GTK_TREE_MODEL (store));

    renderer = gtk_cell_renderer_toggle_new ();
    g_object_set (G_OBJECT (renderer), "activatable", TRUE, NULL);
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Enabled"),
                             renderer, "active", URL_LIST_ENABLED_COLUMN, NULL);
    g_signal_connect (G_OBJECT (renderer), "toggled", G_CALLBACK (url_list_enable_toggled), ui);
    renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (ui->treeview), -1, _("Location"),
                             renderer, "text", URL_LIST_LOCATION_COLUMN, NULL);
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (ui->treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
    g_signal_connect (G_OBJECT (selection), "changed", G_CALLBACK (selection_changed), ui);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (ui->treeview), TRUE);
    g_signal_connect (G_OBJECT (ui->treeview), "row-activated", G_CALLBACK (url_list_double_click), ui);

    ui->url_add = e_builder_get_widget (builder, "url add");
    ui->url_edit = e_builder_get_widget (builder, "url edit");
    ui->url_remove = e_builder_get_widget (builder, "url remove");
    ui->url_enable = e_builder_get_widget (builder, "url enable");
    g_signal_connect (G_OBJECT (ui->url_add), "clicked", G_CALLBACK (url_add_clicked), ui);
    g_signal_connect (G_OBJECT (ui->url_edit), "clicked", G_CALLBACK (url_edit_clicked), ui);
    g_signal_connect (G_OBJECT (ui->url_remove), "clicked", G_CALLBACK (url_remove_clicked), ui);
    g_signal_connect (G_OBJECT (ui->url_enable), "clicked", G_CALLBACK (url_enable_clicked), ui);
    gtk_widget_set_sensitive (GTK_WIDGET (ui->url_edit), FALSE);
    gtk_widget_set_sensitive (GTK_WIDGET (ui->url_remove), FALSE);
    gtk_widget_set_sensitive (GTK_WIDGET (ui->url_enable), FALSE);

    gtk_button_set_image (GTK_BUTTON (ui->url_enable), gtk_image_new_from_stock (GTK_STOCK_APPLY, GTK_ICON_SIZE_BUTTON));
    gtk_button_set_use_underline (GTK_BUTTON (ui->url_enable), TRUE);

    client = gconf_client_get_default ();
    l = publish_uris;
    while (l) {
        EPublishUri *url = (EPublishUri *) l->data;

        gtk_list_store_append (store, &iter);
        gtk_list_store_set (store, &iter,
                    URL_LIST_ENABLED_COLUMN, url->enabled,
                    URL_LIST_LOCATION_COLUMN, url->location,
                    URL_LIST_URL_COLUMN, url, -1);

        l = g_slist_next (l);
    }
    if (gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter))
        gtk_tree_selection_select_iter (selection, &iter);

    toplevel = e_builder_get_widget (builder, "toplevel");
    gtk_widget_show_all (toplevel);
    gtk_box_pack_start (GTK_BOX (data->parent), toplevel, FALSE, TRUE, 0);

    g_object_unref (builder);

    return toplevel;
}

static gpointer
publish_urls (gpointer data)
{
    GSList *l;

    for (l = publish_uris; l; l = g_slist_next (l)) {
        EPublishUri *uri = l->data;
        publish (uri, TRUE);
    }

    return GINT_TO_POINTER (0);
}

static gpointer
publish_uris_set_timeout (GSList *uris)
{
    GSList *l;

    uri_timeouts = g_hash_table_new (g_direct_hash, g_direct_equal);
    l = uris;

    while (l) {
        gchar *xml = l->data;

        EPublishUri *uri = e_publish_uri_from_xml (xml);

        if (!uri->location) {
            g_free (uri);
            l = g_slist_next (l);
            continue;
        }

        publish_uris = g_slist_prepend (publish_uris, uri);

        /* Add a timeout based on the last publish time */
        add_offset_timeout (uri);

        l = g_slist_next (l);
    }
    g_slist_foreach (uris, (GFunc) g_free, NULL);
    g_slist_free (uris);

    return NULL;
}

gint
e_plugin_lib_enable (EPlugin *ep, gint enable)
{
    GSList *uris;
    GConfClient *client;
    EShell *shell = e_shell_get_default ();

    if (shell) {
        g_signal_handlers_disconnect_by_func (shell, G_CALLBACK (online_state_changed), NULL);
        if (enable)
            g_signal_connect (shell, "notify::online", G_CALLBACK (online_state_changed), NULL);
    }

    if (enable) {
        GThread *thread = NULL;
        GError *error = NULL;

        client = gconf_client_get_default ();
        uris = gconf_client_get_list (client, "/apps/evolution/calendar/publish/uris", GCONF_VALUE_STRING, NULL);
        thread = g_thread_create ((GThreadFunc) publish_uris_set_timeout, uris, FALSE, &error);
        if (!thread) {
            g_warning ("Could create thread to set timeout for publishing uris : %s", error->message);
            g_error_free (error);
        }
        g_object_unref (client);
    }

    return 0;
}

struct eq_data {
    gchar *description;
    GError *error;
};

static gboolean
error_queue_show_idle (gpointer user_data)
{
    GString *info = NULL;
    GSList *l;
    gboolean has_error = FALSE, has_info = FALSE;

    g_static_mutex_lock (&error_queue_lock);

    for (l = error_queue; l; l = l->next) {
        struct eq_data *data = l->data;

        if (data) {
            if (data->description) {
                if (!info) {
                    info = g_string_new (data->description);
                } else {
                    g_string_append (info, "\n\n");
                    g_string_append (info, data->description);
                }

                g_free (data->description);
            }

            if (data->error) {
                has_error = TRUE;
                if (!info) {
                    info = g_string_new (data->error->message);
                } else if (data->description) {
                    g_string_append (info, " ");
                    g_string_append (info, data->error->message);
                } else {
                    g_string_append (info, "\n\n");
                    g_string_append (info, data->error->message);
                }

                g_error_free (data->error);
            } else if (data->description) {
                has_info = TRUE;
            }

            g_free (data);
        }
    }

    g_slist_free (error_queue);

    error_queue = NULL;
    error_queue_show_idle_id = 0;

    g_static_mutex_unlock (&error_queue_lock);

    if (info) {
        e_notice (NULL,
              has_error && has_info ? GTK_MESSAGE_WARNING : has_error ? GTK_MESSAGE_ERROR : GTK_MESSAGE_INFO,
              "%s", info->str, NULL);

        g_string_free (info, TRUE);
    }

    return FALSE;
}

void
error_queue_add (gchar *description, GError *error)
{
    struct eq_data *data;

    if (!error && !description)
        return;

    data = g_new0 (struct eq_data, 1);
    data->description = description;
    data->error = error;

    g_static_mutex_lock (&error_queue_lock);
    error_queue = g_slist_append (error_queue, data);
    if (error_queue_show_idle_id == 0)
        error_queue_show_idle_id = g_idle_add (error_queue_show_idle, NULL);
    g_static_mutex_unlock (&error_queue_lock);
}

static void
action_calendar_publish_cb (GtkAction *action,
                            EShellView *shell_view)
{
    GThread *thread = NULL;
    GError *error = NULL;

    thread = g_thread_create ((GThreadFunc) publish_urls, NULL, FALSE, &error);
    if (!thread)
        error_queue_add (g_strdup (_("Could not create publish thread.")), error);
}

static GtkActionEntry entries[] = {

    { "calendar-publish",
      NULL,
      N_("_Publish Calendar Information"),
      NULL,
      NULL,  /* XXX Add a tooltip! */
      G_CALLBACK (action_calendar_publish_cb) }
};

gboolean e_plugin_ui_init (GtkUIManager *ui_manager, EShellView *shell_view);

gboolean
e_plugin_ui_init (GtkUIManager *ui_manager,
                  EShellView *shell_view)
{
    EShellWindow *shell_window;
    GtkActionGroup *action_group;

    shell_window = e_shell_view_get_shell_window (shell_view);
    action_group = e_shell_window_get_action_group (shell_window, "calendar");

    gtk_action_group_add_actions (
        action_group, entries,
        G_N_ELEMENTS (entries), shell_view);

    return TRUE;
}