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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Evolution calendar - Task editor dialog
 *
 * Copyright (C) 2000 Ximian, Inc.
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Authors: Miguel de Icaza <miguel@ximian.com>
 *          Federico Mena-Quintero <federico@ximian.com>
 *          Seth Alves <alves@hungry.com>
 *          JP Rosevear <jpr@ximian.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

#include <config.h>
#include <string.h>
#include <glade/glade.h>
#include <gal/util/e-util.h>
#include <libgnome/gnome-i18n.h>

#include "task-page.h"
#include "task-details-page.h"
#include "meeting-page.h"
#include "cancel-comp.h"
#include "task-editor.h"

struct _TaskEditorPrivate {
    TaskPage *task_page;
    TaskDetailsPage *task_details_page;
    MeetingPage *meet_page;

    EMeetingStore *model;
    
    gboolean assignment_shown;
    gboolean updating;  
};



static void task_editor_class_init (TaskEditorClass *class);
static void task_editor_init (TaskEditor *te);
static void task_editor_set_e_cal (CompEditor *editor, ECal *client);
static void task_editor_edit_comp (CompEditor *editor, ECalComponent *comp);
static gboolean task_editor_send_comp (CompEditor *editor, ECalComponentItipMethod method);
static void task_editor_finalize (GObject *object);

static void assign_task_cmd (GtkWidget *widget, gpointer data);
static void refresh_task_cmd (GtkWidget *widget, gpointer data);
static void cancel_task_cmd (GtkWidget *widget, gpointer data);
static void forward_cmd (GtkWidget *widget, gpointer data);

static void model_row_change_insert_cb (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data);
static void model_row_delete_cb (GtkTreeModel *model, GtkTreePath *path, gpointer data);

static CompEditorClass *parent_class;



/**
 * task_editor_get_type:
 *
 * Registers the #TaskEditor class if necessary, and returns the type ID
 * associated to it.
 *
 * Return value: The type ID of the #TaskEditor class.
 **/

E_MAKE_TYPE (task_editor, "TaskEditor", TaskEditor, task_editor_class_init, task_editor_init,
         TYPE_COMP_EDITOR);

/* Class initialization function for the event editor */
static void
task_editor_class_init (TaskEditorClass *klass)
{
    GObjectClass *object_class;
    CompEditorClass *editor_class;

    object_class = (GObjectClass *) klass;
    editor_class = (CompEditorClass *) klass;

    parent_class = g_type_class_ref(TYPE_COMP_EDITOR);

    editor_class->set_e_cal = task_editor_set_e_cal;
    editor_class->edit_comp = task_editor_edit_comp;
    editor_class->send_comp = task_editor_send_comp;

    object_class->finalize = task_editor_finalize;
}

static void
init_widgets (TaskEditor *te)
{
    TaskEditorPrivate *priv;

    priv = te->priv;

    g_signal_connect((priv->model), "row_changed",
                G_CALLBACK (model_row_change_insert_cb), te);
    g_signal_connect((priv->model), "row_inserted",
                G_CALLBACK (model_row_change_insert_cb), te);
    g_signal_connect((priv->model), "row_deleted",
                G_CALLBACK (model_row_delete_cb), te);
}

static void
client_changed_cb (CompEditorPage *page, ECal *client, gpointer user_data)
{
//  set_menu_sens (TASK_EDITOR (user_data));
}

/* Object initialization function for the task editor */
static void
task_editor_init (TaskEditor *te)
{
    TaskEditorPrivate *priv;
    
    priv = g_new0 (TaskEditorPrivate, 1);
    te->priv = priv;

    priv->model = E_MEETING_STORE (e_meeting_store_new ());
    priv->assignment_shown = TRUE;
    priv->updating = FALSE; 

}

TaskEditor *
task_editor_construct (TaskEditor *te, ECal *client)
{
    TaskEditorPrivate *priv;
    
    priv = te->priv;

    priv->task_page = task_page_new ();
    g_object_ref (priv->task_page);
    gtk_object_sink (GTK_OBJECT (priv->task_page));
    comp_editor_append_page (COMP_EDITOR (te), 
                 COMP_EDITOR_PAGE (priv->task_page),
                 _("Task"));
    g_signal_connect (G_OBJECT (priv->task_page), "client_changed",
              G_CALLBACK (client_changed_cb), te);

    priv->task_details_page = task_details_page_new ();
    g_object_ref (priv->task_details_page);
    gtk_object_sink (GTK_OBJECT (priv->task_details_page));
    comp_editor_append_page (COMP_EDITOR (te),
                 COMP_EDITOR_PAGE (priv->task_details_page),
                 _("Status"));

    priv->meet_page = meeting_page_new (priv->model, client);
    g_object_ref (priv->meet_page);
    gtk_object_sink (GTK_OBJECT (priv->meet_page));
    comp_editor_append_page (COMP_EDITOR (te),
                 COMP_EDITOR_PAGE (priv->meet_page),
                 _("Assignment"));

    comp_editor_set_e_cal (COMP_EDITOR (te), client);

    init_widgets (te);

    return te;
}

static void
task_editor_set_e_cal (CompEditor *editor, ECal *client)
{
    TaskEditor *te;
    TaskEditorPrivate *priv;

    te = TASK_EDITOR (editor);
    priv = te->priv;

    e_meeting_store_set_e_cal (priv->model, client);

    if (parent_class->set_e_cal)
        parent_class->set_e_cal (editor, client);
}

static void
task_editor_edit_comp (CompEditor *editor, ECalComponent *comp)
{
    TaskEditor *te;
    TaskEditorPrivate *priv;
    ECalComponentOrganizer organizer;
    ECal *client;
    GSList *attendees = NULL;
    
    te = TASK_EDITOR (editor);
    priv = te->priv;

    priv->updating = TRUE;

    if (parent_class->edit_comp)
        parent_class->edit_comp (editor, comp);

    client = comp_editor_get_e_cal (COMP_EDITOR (editor));

    /* Get meeting related stuff */
    e_cal_component_get_organizer (comp, &organizer);
    e_cal_component_get_attendee_list (comp, &attendees);
    
    /* Clear things up */
    e_meeting_store_remove_all_attendees (priv->model);

    if (attendees == NULL) {
        comp_editor_remove_page (editor, COMP_EDITOR_PAGE (priv->meet_page));
        priv->assignment_shown = FALSE;
    } else {
        GSList *l;
        int row;
        
        if (!priv->assignment_shown)
            comp_editor_append_page (COMP_EDITOR (te),
                         COMP_EDITOR_PAGE (priv->meet_page),
                         _("Assignment"));

        for (l = attendees; l != NULL; l = l->next) {
            ECalComponentAttendee *ca = l->data;
            EMeetingAttendee *ia;

            ia = E_MEETING_ATTENDEE (e_meeting_attendee_new_from_e_cal_component_attendee (ca));
            /* If we aren't the organizer or the attendee is just delegating, don't allow editing */
            if (!comp_editor_get_user_org (editor) || e_meeting_attendee_is_set_delto (ia))
                e_meeting_attendee_set_edit_level (ia,  E_MEETING_ATTENDEE_EDIT_NONE);
            e_meeting_store_add_attendee (priv->model, ia);         

            g_object_unref(ia);
        }

        /* If we aren't the organizer we can still change our own status */
        if (!comp_editor_get_user_org (editor)) {
            EAccountList *accounts;
            EAccount *account;
            EIterator *it;

            accounts = itip_addresses_get ();
            for (it = e_list_get_iterator((EList *)accounts);e_iterator_is_valid(it);e_iterator_next(it)) {
                EMeetingAttendee *ia;

                account = (EAccount*)e_iterator_get(it);

                ia = e_meeting_store_find_attendee (priv->model, account->id->address, &row);
                if (ia != NULL)
                    e_meeting_attendee_set_edit_level (ia, E_MEETING_ATTENDEE_EDIT_STATUS);
            }
            g_object_unref(it);
        } else if (e_cal_get_organizer_must_attend (client)) {
            EMeetingAttendee *ia;

            ia = e_meeting_store_find_attendee (priv->model, organizer.value, &row);
            if (ia != NULL)
                e_meeting_attendee_set_edit_level (ia, E_MEETING_ATTENDEE_EDIT_NONE);
        }

        priv->assignment_shown = TRUE;      
    }
    e_cal_component_free_attendee_list (attendees);

    comp_editor_set_needs_send (COMP_EDITOR (te), priv->assignment_shown && itip_organizer_is_user (comp, client));

    priv->updating = FALSE;
}

static gboolean
task_editor_send_comp (CompEditor *editor, ECalComponentItipMethod method)
{
    TaskEditor *te = TASK_EDITOR (editor);
    TaskEditorPrivate *priv;
    ECalComponent *comp = NULL;

    priv = te->priv;

    /* Don't cancel more than once or when just publishing */
    if (method == E_CAL_COMPONENT_METHOD_PUBLISH ||
        method == E_CAL_COMPONENT_METHOD_CANCEL)
        goto parent;
    
    comp = meeting_page_get_cancel_comp (priv->meet_page);
    if (comp != NULL) {
        ECal *client;
        gboolean result;
        
        client = e_meeting_store_get_e_cal (priv->model);
        result = itip_send_comp (E_CAL_COMPONENT_METHOD_CANCEL, comp, client, NULL);
        g_object_unref (comp);

        if (!result)
            return FALSE;
    }

 parent:
    if (parent_class->send_comp)
        return parent_class->send_comp (editor, method);

    return FALSE;
}

/* Destroy handler for the event editor */
static void
task_editor_finalize (GObject *object)
{
    TaskEditor *te;
    TaskEditorPrivate *priv;

    g_return_if_fail (object != NULL);
    g_return_if_fail (IS_TASK_EDITOR (object));

    te = TASK_EDITOR (object);
    priv = te->priv;

    g_object_unref (priv->task_page);
    g_object_unref (priv->task_details_page);
    g_object_unref (priv->meet_page);
    
    g_object_unref (priv->model);
    
    g_free (priv);

    if (G_OBJECT_CLASS (parent_class)->finalize)
        (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}

/**
 * task_editor_new:
 * @client: a ECal
 *
 * Creates a new event editor dialog.
 *
 * Return value: A newly-created event editor dialog, or NULL if the event
 * editor could not be created.
 **/
TaskEditor *
task_editor_new (ECal *client)
{
    TaskEditor *te;

    te = g_object_new (TYPE_TASK_EDITOR, NULL);
    return task_editor_construct (te, client);
}

static void
show_assignment (TaskEditor *te)
{
    TaskEditorPrivate *priv;

    priv = te->priv;

    if (!priv->assignment_shown) {
        comp_editor_append_page (COMP_EDITOR (te),
                     COMP_EDITOR_PAGE (priv->meet_page),
                     _("Assignment"));
        priv->assignment_shown = TRUE;

        comp_editor_set_needs_send (COMP_EDITOR (te), priv->assignment_shown);
        comp_editor_set_changed (COMP_EDITOR (te), TRUE);
    }

    comp_editor_show_page (COMP_EDITOR (te),
                   COMP_EDITOR_PAGE (priv->meet_page));
}

void
task_editor_show_assignment (TaskEditor *te)
{
    g_return_if_fail (te != NULL);
    g_return_if_fail (IS_TASK_EDITOR (te));

    show_assignment (te);
}

static void
assign_task_cmd (GtkWidget *widget, gpointer data)
{
    TaskEditor *te = TASK_EDITOR (data);

    show_assignment (te);
}

static void
refresh_task_cmd (GtkWidget *widget, gpointer data)
{
    TaskEditor *te = TASK_EDITOR (data);

    comp_editor_send_comp (COMP_EDITOR (te), E_CAL_COMPONENT_METHOD_REFRESH);
}

static void
cancel_task_cmd (GtkWidget *widget, gpointer data)
{
    TaskEditor *te = TASK_EDITOR (data);
    ECalComponent *comp;
    
    comp = comp_editor_get_current_comp (COMP_EDITOR (te));
    if (cancel_component_dialog ((GtkWindow *) te,
                     comp_editor_get_e_cal (COMP_EDITOR (te)), comp, FALSE)) {
        comp_editor_send_comp (COMP_EDITOR (te), E_CAL_COMPONENT_METHOD_CANCEL);
        comp_editor_delete_comp (COMP_EDITOR (te));
    }
}

static void
forward_cmd (GtkWidget *widget, gpointer data)
{
    TaskEditor *te = TASK_EDITOR (data);
    
    if (comp_editor_save_comp (COMP_EDITOR (te), TRUE))
        comp_editor_send_comp (COMP_EDITOR (te), E_CAL_COMPONENT_METHOD_PUBLISH);
}

static void
model_changed (TaskEditor *te)
{
    if (!te->priv->updating) {
        comp_editor_set_changed (COMP_EDITOR (te), TRUE);
        comp_editor_set_needs_send (COMP_EDITOR (te), TRUE);
    }   
}

static void
model_row_change_insert_cb (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data)
{
    model_changed (TASK_EDITOR (data));
}

static void
model_row_delete_cb (GtkTreeModel *model, GtkTreePath *path, gpointer data)
{
    model_changed (TASK_EDITOR (data));
}