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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-task-shell-module.c
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include <string.h>
#include <glib/gi18n.h>
#include <libecal/e-cal.h>
#include <libedataserver/e-source.h>
#include <libedataserver/e-source-list.h>
#include <libedataserver/e-source-group.h>

#include <e-shell.h>
#include <e-shell-module.h>
#include <e-shell-window.h>

#include <calendar-config.h>
#include <e-task-shell-view.h>

#define MODULE_NAME     "tasks"
#define MODULE_ALIASES      ""
#define MODULE_SCHEMES      "task"
#define MODULE_SEARCHES     "tasktypes.xml"
#define MODULE_SORT_ORDER   600

#define WEB_BASE_URI        "webcal://"
#define PERSONAL_RELATIVE_URI   "system"

/* Module Entry Point */
void e_shell_module_init (GTypeModule *type_module);

static void
task_module_ensure_sources (EShellModule *shell_module)
{
    /* XXX This is basically the same algorithm across all modules.
     *     Maybe we could somehow integrate this into EShellModule? */

    ESourceList *source_list;
    ESourceGroup *on_this_computer;
    ESourceGroup *on_the_web;
    ESource *personal;
    GSList *groups, *iter;
    const gchar *data_dir;
    gchar *base_uri;
    gchar *filename;

    on_this_computer = NULL;
    on_the_web = NULL;
    personal = NULL;

    if (!e_cal_get_sources (&source_list, E_CAL_SOURCE_TYPE_TODO, NULL)) {
        g_warning ("Could not get task sources from GConf!");
        return;
    }

    /* Share the source list with all task views.  This is
     * accessible via e_task_shell_view_get_source_list().
     * Note: EShellModule takes ownership of the reference.
     *
     * XXX I haven't yet decided if I want to add a proper
     *     EShellModule API for this.  The mail module would
     *     not use it. */
    g_object_set_data_full (
        G_OBJECT (shell_module), "source-list",
        source_list, (GDestroyNotify) g_object_unref);

    data_dir = e_shell_module_get_data_dir (shell_module);
    filename = g_build_filename (data_dir, "local", NULL);
    base_uri = g_filename_to_uri (filename, NULL, NULL);
    g_free (filename);

    groups = e_source_list_peek_groups (source_list);
    for (iter = groups; iter != NULL; iter = iter->next) {
        ESourceGroup *source_group = iter->data;
        const gchar *group_base_uri;

        group_base_uri = e_source_group_peek_base_uri (source_group);

        /* Compare only "file://" part.  If the user's home
         * changes, we do not want to create another group. */
        if (on_this_computer == NULL &&
            strncmp (base_uri, group_base_uri, 7) == 0)
            on_this_computer = source_group;

        else if (on_the_web == NULL &&
            strcmp (WEB_BASE_URI, group_base_uri) == 0)
            on_the_web = source_group;
    }

    if (on_this_computer != NULL) {
        GSList *sources;
        const gchar *group_base_uri;

        sources = e_source_group_peek_sources (on_this_computer);
        group_base_uri = e_source_group_peek_base_uri (on_this_computer);

        /* Make sure this group includes a "Personal" source. */
        for (iter = sources; iter != NULL; iter = iter->next) {
            ESource *source = iter->data;
            const gchar *relative_uri;

            relative_uri = e_source_peek_relative_uri (source);
            if (relative_uri == NULL)
                continue;

            if (strcmp (PERSONAL_RELATIVE_URI, relative_uri) != 0)
                continue;

            personal = source;
            break;
        }

        /* Make sure we have the correct base URI.  This can
         * change when the user's home directory changes. */
        if (strcmp (base_uri, group_base_uri) != 0) {
            e_source_group_set_base_uri (
                on_this_computer, base_uri);

            /* XXX We shouldn't need this sync call here as
             *     set_base_uri() results in synching to GConf,
             *     but that happens in an idle loop and too late
             *     to prevent the user from seeing a "Cannot
             *     Open ... because of invalid URI" error. */
            e_source_list_sync (source_list, NULL);
        }

    } else {
        ESourceGroup *source_group;
        const gchar *name;

        name = _("On This Computer");
        source_group = e_source_group_new (name, base_uri);
        e_source_list_add_group (source_list, source_group, -1);
        g_object_unref (source_group);
    }

    if (personal == NULL) {
        ESource *source;
        GSList *selected;
        const gchar *name;
        gchar *primary;

        name = _("Personal");
        source = e_source_new (name, PERSONAL_RELATIVE_URI);
        e_source_group_add_source (on_this_computer, source, -1);
        g_object_unref (source);

        primary = calendar_config_get_primary_tasks ();
        selected = calendar_config_get_tasks_selected ();

        if (primary == NULL && selected == NULL) {
            const gchar *uid;

            uid = e_source_peek_uid (source);
            selected = g_slist_prepend (NULL, g_strdup (uid));

            calendar_config_set_primary_tasks (uid);
            calendar_config_set_tasks_selected (selected);
        }

        g_slist_foreach (selected, (GFunc) g_free, NULL);
        g_slist_free (selected);
        g_free (primary);
    }

    if (on_the_web == NULL) {
        ESourceGroup *source_group;
        const gchar *name;

        name = _("On The Web");
        source_group = e_source_group_new (name, WEB_BASE_URI);
        e_source_list_add_group (source_list, source_group, -1);
        g_object_unref (source_group);
    }

    g_free (base_uri);
}

static void
action_task_new_cb (GtkAction *action,
                    EShellWindow *shell_window)
{
}

static void
action_task_assigned_new_cb (GtkAction *action,
                             EShellWindow *shell_window)
{
}

static void
action_task_list_new_cb (GtkAction *action,
                         EShellWindow *shell_window)
{
}

static GtkActionEntry item_entries[] = {

    { "task-new",
      "stock_task",
      N_("_Task"),  /* XXX Need C_() here */
      "<Control>t",
      N_("Create a new task"),
      G_CALLBACK (action_task_new_cb) },

    { "task-assigned-new",
      "stock_task",
      N_("Assigne_d Task"),
      NULL,
      N_("Create a new assigned task"),
      G_CALLBACK (action_task_assigned_new_cb) }
};

static GtkActionEntry source_entries[] = {

    { "task-list-new",
      "stock_todo",
      N_("Tas_k List"),
      NULL,
      N_("Create a new task list"),
      G_CALLBACK (action_task_list_new_cb) }
};

static gboolean
task_module_handle_uri (EShellModule *shell_module,
                        const gchar *uri)
{
        /* FIXME */
        return FALSE;
}

static void
task_module_window_created (EShellModule *shell_module,
                            EShellWindow *shell_window)
{
        const gchar *module_name;

        module_name = G_TYPE_MODULE (shell_module)->name;

        e_shell_window_register_new_item_actions (
                shell_window, module_name,
                item_entries, G_N_ELEMENTS (item_entries));

        e_shell_window_register_new_source_actions (
                shell_window, module_name,
                source_entries, G_N_ELEMENTS (source_entries));
}

static EShellModuleInfo module_info = {

        MODULE_NAME,
        MODULE_ALIASES,
        MODULE_SCHEMES,
        MODULE_SEARCHES,
        MODULE_SORT_ORDER
};

void
e_shell_module_init (GTypeModule *type_module)
{
        EShell *shell;
        EShellModule *shell_module;

        shell_module = E_SHELL_MODULE (type_module);
        shell = e_shell_module_get_shell (shell_module);

    /* Register the GType for ETaskShellView. */
        e_task_shell_view_get_type (type_module);

        e_shell_module_set_info (shell_module, &module_info);

    task_module_ensure_sources (shell_module);

        g_signal_connect_swapped (
                shell, "handle-uri",
                G_CALLBACK (task_module_handle_uri), shell_module);

        g_signal_connect_swapped (
                shell, "window-created",
                G_CALLBACK (task_module_window_created), shell_module);
}