path: root/calendar/gui/component-factory.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* component-factory.c
 *
 * Copyright (C) 2000  Ximian, Inc.
 * Copyright (C) 2000  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

#include <config.h>

#include <errno.h>
#include <libgnomevfs/gnome-vfs-types.h>
#include <libgnomevfs/gnome-vfs-uri.h>
#include <libgnomevfs/gnome-vfs-ops.h>

#include <bonobo/bonobo-generic-factory.h>
#include <bonobo/bonobo-context.h>
#include "evolution-shell-component.h"
#include "component-factory.h"
#include "tasks-control-factory.h"
#include "control-factory.h"
#include "calendar-config.h"
#include "tasks-control.h"
#include "tasks-migrate.h"



/* OAFIID for the component.  */
#define COMPONENT_ID "OAFIID:GNOME_Evolution_Calendar_ShellComponent"
 
/* Folder type IDs */
#define FOLDER_CALENDAR "calendar"
#define FOLDER_TASKS "tasks"

/* IDs for user creatable items */
#define CREATE_EVENT_ID "event"
#define CREATE_TASK_ID "task"

static BonoboGenericFactory *factory = NULL;
char *evolution_dir;

static const EvolutionShellComponentFolderType folder_types[] = {
    { FOLDER_CALENDAR,
      "evolution-calendar.png",
      N_("Calendar"),
      N_("Folder containing appointments and events"),
      TRUE, NULL, NULL },
    { FOLDER_TASKS,
      "evolution-tasks.png",
      N_("Tasks"),
      N_("Folder containing to-do items"),
      TRUE, NULL, NULL },
    { NULL, NULL }
};


/* Utility functions.  */

static const char *
get_local_file_name_for_folder_type (const char *type)
{
    if (strcmp (type, "calendar") == 0)
        return "calendar.ics";
    else if (strcmp (type, "tasks") == 0)
        return "tasks.ics";
    else
        return NULL;
}


/* EvolutionShellComponent methods and signals.  */

static EvolutionShellComponentResult
create_view (EvolutionShellComponent *shell_component,
         const char *physical_uri,
         const char *type,
         BonoboControl **control_return,
         void *closure)
{
    BonoboControl *control;

    if (!g_strcasecmp (type, "calendar")) {
        control = control_factory_new_control ();
        if (!control)
            return EVOLUTION_SHELL_COMPONENT_CORBAERROR;
    } else if (!g_strcasecmp (type, "tasks")) {
        control = tasks_control_new ();
        if (!control)
            return EVOLUTION_SHELL_COMPONENT_CORBAERROR;
    } else {
        return EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDTYPE;
    }

    bonobo_control_set_property (control, "folder_uri", physical_uri, NULL);

    *control_return = control;

    return EVOLUTION_SHELL_COMPONENT_OK;
}

static void
create_folder (EvolutionShellComponent *shell_component,
           const char *physical_uri,
           const char *type,
           const GNOME_Evolution_ShellComponentListener listener,
           void *closure)
{
    CORBA_Environment ev;

    CORBA_exception_init(&ev);
    /* FIXME: I don't think we have to do anything to create a calendar
       or tasks folder - the '.ics' files are created automatically when
       needed. But I'm not sure - Damon. */
    if (!strcmp(type, "calendar") || !strcmp(type, "tasks")) {
        GNOME_Evolution_ShellComponentListener_notifyResult(listener, GNOME_Evolution_ShellComponentListener_OK, &ev);
    } else {
        GNOME_Evolution_ShellComponentListener_notifyResult(listener, GNOME_Evolution_ShellComponentListener_UNSUPPORTED_TYPE, &ev);
    }
    CORBA_exception_free(&ev);
}

static void
remove_folder (EvolutionShellComponent *shell_component,
           const char *physical_uri,
           const char *type,
           const GNOME_Evolution_ShellComponentListener listener,
           void *closure)
{
    CORBA_Environment ev;
    const char *file_name;
    gchar *path;
    int rv;

    CORBA_exception_init(&ev);

    /* check URI */
    if (strncmp (physical_uri, "file://", 7)) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_INVALID_URI,
            &ev);
        CORBA_exception_free (&ev);
        return;
    }

    /* FIXME: check if there are subfolders? */

    file_name = get_local_file_name_for_folder_type (type);
    if (file_name == NULL) {
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_UNSUPPORTED_TYPE,
                                     &ev);
        CORBA_exception_free (&ev);
        return;
    }

    /* remove the .ics file */
    path = g_concat_dir_and_file (physical_uri + 7, file_name);
    rv = unlink (path);
    g_free (path);
    if (rv == 0) {
        /* everything OK; notify the listener */
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_OK,
            &ev);
    }
    else {
        if (errno == EACCES || errno == EPERM)
            GNOME_Evolution_ShellComponentListener_notifyResult (
                listener,
                GNOME_Evolution_ShellComponentListener_PERMISSION_DENIED,
                &ev);
        else
            GNOME_Evolution_ShellComponentListener_notifyResult (
                listener,
                GNOME_Evolution_ShellComponentListener_INVALID_URI, /*XXX*/
                &ev);
    }

    CORBA_exception_free(&ev);
}

/* callback used from icalparser_parse */
static char *
get_line_fn (char *s, size_t size, void *data)
{
    FILE *file;

    file = data;
    return fgets (s, size, file);
}

static void
xfer_folder (EvolutionShellComponent *shell_component,
         const char *source_physical_uri,
         const char *destination_physical_uri,
         const char *type,
         gboolean remove_source,
         const GNOME_Evolution_ShellComponentListener listener,
         void *closure)
{
    CORBA_Environment ev;
    gchar *source_path;
    FILE *fin;
    icalparser *parser;
    icalcomponent *icalcomp;
    GnomeVFSHandle *handle;
    GnomeVFSURI *uri;
    GnomeVFSFileSize out;
    char *buf;
    const char *file_name;

    CORBA_exception_init (&ev);

    /* check URI */
    if (strncmp (source_physical_uri, "file://", 7)
        || strncmp (destination_physical_uri, "file://", 7)) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_INVALID_URI,
            &ev);
        CORBA_exception_free (&ev);
        return;
    }

    file_name = get_local_file_name_for_folder_type (type);
    if (file_name == NULL) {
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_UNSUPPORTED_TYPE,
                                     &ev);
        CORBA_exception_free (&ev);
        return;
    }

    /* open source and destination files */
    source_path = g_concat_dir_and_file (source_physical_uri + 7, "calendar.ics");

    fin = fopen (source_path, "r");
    if (!fin) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_PERMISSION_DENIED,
            &ev);
        g_free (source_path);
        CORBA_exception_free (&ev);
        return;
    }
    parser = icalparser_new ();
    icalparser_set_gen_data (parser, fin);
    icalcomp = icalparser_parse (parser, get_line_fn);
    icalparser_free (parser);
    if (!icalcomp
        || icalcomponent_isa (icalcomp) != ICAL_VCALENDAR_COMPONENT) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_PERMISSION_DENIED,
            &ev);
        fclose (fin);
        g_free (source_path);
        if (icalcomp)
            icalcomponent_free (icalcomp);
        CORBA_exception_free (&ev);
        return;
    }

    /* now, write the new file out */
    uri = gnome_vfs_uri_new (destination_physical_uri);
    if (gnome_vfs_create_uri (&handle, uri, GNOME_VFS_OPEN_WRITE, FALSE, 0666)
        != GNOME_VFS_OK) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_INVALID_URI,
            &ev);
        fclose (fin);
        g_free (source_path);
        icalcomponent_free (icalcomp);
        CORBA_exception_free (&ev);
        return;
    }
    buf = icalcomponent_as_ical_string (icalcomp);
    if (gnome_vfs_write (handle, buf, strlen (buf) * sizeof (char), &out)
        != GNOME_VFS_OK) {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_PERMISSION_DENIED,
            &ev);
    }
    else {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener,
            GNOME_Evolution_ShellComponentListener_OK,
            &ev);
    }

    gnome_vfs_close (handle);
    gnome_vfs_uri_unref (uri);
    
    /* free resources */
    fclose (fin);

    if (remove_source)
        unlink (source_path);

    g_free (source_path);
    icalcomponent_free (icalcomp);
    CORBA_exception_free (&ev);
}

static GList *shells = NULL;

static void
owner_set_cb (EvolutionShellComponent *shell_component,
          EvolutionShellClient *shell_client,
          const char *evolution_homedir,
          gpointer user_data)
{
    static gboolean migrated = FALSE;
    
    evolution_dir = g_strdup (evolution_homedir);

    calendar_config_init ();

    if (!migrated) {
        tasks_migrate ();
        migrated = TRUE;
    }

    shells = g_list_append (shells, shell_component);
}

static void
owner_unset_cb (EvolutionShellComponent *shell_component,
          gpointer user_data)
{
    shells = g_list_remove (shells, shell_component);
    
    if (g_list_length (shells) == 0)
        gtk_main_quit ();
}

/* Computes the final URI for a calendar component */
static char *
get_data_uri (const char *uri, CalComponentVType vtype)
{
    if (uri) {
        if (vtype == CAL_COMPONENT_EVENT)
            return g_concat_dir_and_file (uri, "calendar.ics");
        else if (vtype == CAL_COMPONENT_TODO)
            return g_concat_dir_and_file (uri, "tasks.ics");
        else
            g_assert_not_reached ();
    } else {
        if (vtype == CAL_COMPONENT_EVENT)
            return g_concat_dir_and_file (g_get_home_dir (),
                              "evolution/local/Calendar/calendar.ics");
        else if (vtype == CAL_COMPONENT_TODO)
            return g_concat_dir_and_file (g_get_home_dir (),
                              "evolution/local/Tasks/tasks.ics");
        else
            g_assert_not_reached ();
    }

    return NULL;
}

/* Creates a calendar component at a specified URI.  If the URI is NULL then it
 * uses the default folder for that type of component.
 */
static void
create_component (const char *uri, CalComponentVType vtype)
{
    char *real_uri;
    CORBA_Environment ev;
    GNOME_Evolution_Calendar_CalObjType corba_type;
    GNOME_Evolution_Calendar_CompEditorFactory factory;

    real_uri = get_data_uri (uri, vtype);

    switch (vtype) {
    case CAL_COMPONENT_EVENT:
        corba_type = GNOME_Evolution_Calendar_TYPE_EVENT;
        break;

    case CAL_COMPONENT_TODO:
        corba_type = GNOME_Evolution_Calendar_TYPE_TODO;
        break;

    default:
        g_assert_not_reached ();
        return;
    }

    /* Get the factory */

    CORBA_exception_init (&ev);
    factory = oaf_activate_from_id ("OAFIID:GNOME_Evolution_Calendar_CompEditorFactory",
                    0, NULL, &ev);

    if (ev._major != CORBA_NO_EXCEPTION) {
        g_message ("create_component(): Could not activate the component editor factory");
        CORBA_exception_free (&ev);
        g_free (real_uri);
        return;
    }
    CORBA_exception_free (&ev);

    /* Create the item */

    CORBA_exception_init (&ev);
    GNOME_Evolution_Calendar_CompEditorFactory_editNew (factory, real_uri, corba_type, &ev);

    if (ev._major != CORBA_NO_EXCEPTION)
        g_message ("create_component(): Exception while creating the component");

    CORBA_exception_free (&ev);
    g_free (real_uri);

    /* Get rid of the factory */

    CORBA_exception_init (&ev);
    bonobo_object_release_unref (factory, &ev);
    if (ev._major != CORBA_NO_EXCEPTION)
        g_message ("create_component(): Could not unref the calendar component factory");

    CORBA_exception_free (&ev);
}

/* Callback used when we must create a user-creatable item */
static void
sc_user_create_new_item_cb (EvolutionShellComponent *shell_component,
                const char *id,
                const char *parent_folder_physical_uri,
                const char *parent_folder_type)
{
    if (strcmp (id, CREATE_EVENT_ID) == 0) {
        if (strcmp (parent_folder_type, FOLDER_CALENDAR) == 0)
            create_component (parent_folder_physical_uri, CAL_COMPONENT_EVENT);
        else
            create_component (NULL, CAL_COMPONENT_EVENT);
    } else if (strcmp (id, CREATE_TASK_ID) == 0) {
        if (strcmp (parent_folder_type, FOLDER_TASKS) == 0)
            create_component (parent_folder_physical_uri, CAL_COMPONENT_TODO);
        else
            create_component (NULL, CAL_COMPONENT_TODO);
    } else
        g_assert_not_reached ();
}

#if 0
static void
destroy_cb (EvolutionShellComponent *shell_component,
        gpointer user_data)
{
    shells = g_list_remove (shells, shell_component);
    
    if (g_list_length (shells) == 0)
        gtk_main_quit ();
}
#endif


/* The factory function.  */

static BonoboObject *
create_object (void)
{
    EvolutionShellComponent *shell_component;
    
    shell_component = evolution_shell_component_new (folder_types,
                             NULL,
                             create_view,
                             create_folder,
                             remove_folder,
                             xfer_folder,
                             NULL, /* populate_folder_context_menu_fn */
                             NULL, /* get_dnd_selection_fn */
                             NULL  /* closure */);

    gtk_signal_connect (GTK_OBJECT (shell_component), "owner_set",
                GTK_SIGNAL_FUNC (owner_set_cb), NULL);
    gtk_signal_connect (GTK_OBJECT (shell_component), "owner_unset",
                GTK_SIGNAL_FUNC (owner_unset_cb), NULL);

#if 0
    gtk_signal_connect (GTK_OBJECT (shell_component), "destroy",
                GTK_SIGNAL_FUNC (destroy_cb), NULL);

    shells = g_list_append (shells, shell_component);
#endif

    /* User creatable items */

    evolution_shell_component_add_user_creatable_item (shell_component,
                               CREATE_EVENT_ID,
                               _("Create a new appointment"),
                               _("New _Appointment"),
                               'a');

    evolution_shell_component_add_user_creatable_item (shell_component,
                               CREATE_TASK_ID,
                               _("Create a new task"),
                               _("New _Task"),
                               't');

    gtk_signal_connect (GTK_OBJECT (shell_component), "user_create_new_item",
                GTK_SIGNAL_FUNC (sc_user_create_new_item_cb), NULL);

    return BONOBO_OBJECT (shell_component);
}


void
component_factory_init (void)
{
    BonoboObject *object;
    int result;

    object = create_object ();

    result = oaf_active_server_register (COMPONENT_ID, bonobo_object_corba_objref (object));

    if (result == OAF_REG_ERROR)
        g_error ("Cannot initialize Evolution's calendar component.");
}