path: root/modules/calendar/e-task-shell-backend.c

/*
 * e-task-shell-backend.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-task-shell-backend.h"

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

#include "shell/e-shell.h"
#include "shell/e-shell-backend.h"
#include "shell/e-shell-window.h"

#include "calendar/common/authentication.h"
#include "calendar/gui/calendar-config.h"
#include "calendar/gui/comp-util.h"
#include "calendar/gui/dialogs/calendar-setup.h"
#include "calendar/gui/dialogs/task-editor.h"

#include "e-task-shell-content.h"
#include "e-task-shell-migrate.h"
#include "e-task-shell-sidebar.h"
#include "e-task-shell-view.h"

#define E_TASK_SHELL_BACKEND_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_TASK_SHELL_BACKEND, ETaskShellBackendPrivate))

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

struct _ETaskShellBackendPrivate {
    ESourceList *source_list;
};

enum {
    PROP_0,
    PROP_SOURCE_LIST
};

static gpointer parent_class;
static GType task_shell_backend_type;

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

    ETaskShellBackendPrivate *priv;
    ESourceGroup *on_this_computer;
    ESource *personal;
    EShell *shell;
    EShellSettings *shell_settings;
    const gchar *data_dir;
    const gchar *name;
    gchar *base_uri, base_uri_seventh;
    gchar *filename;
    gboolean save_list = FALSE;

    on_this_computer = NULL;
    personal = NULL;

    priv = E_TASK_SHELL_BACKEND_GET_PRIVATE (shell_backend);

    shell = e_shell_backend_get_shell (shell_backend);
    shell_settings = e_shell_get_shell_settings (shell);

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

    data_dir = e_shell_backend_get_data_dir (shell_backend);
    filename = g_build_filename (data_dir, "local", NULL);
    base_uri = g_filename_to_uri (filename, NULL, NULL);
    g_free (filename);

    if (strlen (base_uri) > 7) {
        /* Compare only file:// part. If user home dir name
         * changes we do not want to create one more group. */
        base_uri_seventh = base_uri[7];
        base_uri[7] = 0;
    } else {
        base_uri_seventh = -1;
    }

    on_this_computer = e_source_list_ensure_group (
        priv->source_list, _("On This Computer"), base_uri, TRUE);
    e_source_list_ensure_group (
        priv->source_list, _("On The Web"), WEB_BASE_URI, FALSE);

    if (base_uri_seventh != -1) {
        base_uri[7] = base_uri_seventh;
    }

    if (on_this_computer != NULL) {
        GSList *sources, *iter;
        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. */
            save_list = TRUE;
        }

    }

    name = _("Personal");

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

        source = e_source_new (name, PERSONAL_RELATIVE_URI);
        e_source_set_color_spec (source, "#BECEDD");
        e_source_group_add_source (on_this_computer, source, -1);
        g_object_unref (source);
        save_list = TRUE;

        primary = e_shell_settings_get_string (
            shell_settings, "cal-primary-task-list");

        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));

            e_shell_settings_set_string (
                shell_settings, "cal-primary-task-list", uid);
            calendar_config_set_tasks_selected (selected);
        }

        g_slist_foreach (selected, (GFunc) g_free, NULL);
        g_slist_free (selected);
        g_free (primary);
    } else {
        /* Force the source name to the current locale. */
        e_source_set_name (personal, name);
    }

    g_object_unref (on_this_computer);
    g_free (base_uri);

    if (save_list)
        e_source_list_sync (priv->source_list, NULL);
}

static void
task_shell_backend_task_new_cb (ECal *cal,
                                ECalendarStatus status,
                                EShell *shell)
{
    ECalComponent *comp;
    CompEditor *editor;
    CompEditorFlags flags = 0;

    /* XXX Handle errors better. */
    if (status != E_CALENDAR_STATUS_OK)
        return;

    flags |= COMP_EDITOR_NEW_ITEM;

    editor = task_editor_new (cal, shell, flags);
    comp = cal_comp_task_new_with_defaults (cal);
    comp_editor_edit_comp (editor, comp);

    gtk_window_present (GTK_WINDOW (editor));

    g_object_unref (comp);
    g_object_unref (cal);
}

static void
task_shell_backend_task_assigned_new_cb (ECal *cal,
                                         ECalendarStatus status,
                                         EShell *shell)
{
    ECalComponent *comp;
    CompEditor *editor;
    CompEditorFlags flags = 0;

    /* XXX Handle errors better. */
    if (status != E_CALENDAR_STATUS_OK)
        return;

    flags |= COMP_EDITOR_NEW_ITEM;
    flags |= COMP_EDITOR_IS_ASSIGNED;
    flags |= COMP_EDITOR_USER_ORG;

    editor = task_editor_new (cal, shell, flags);
    comp = cal_comp_task_new_with_defaults (cal);
    comp_editor_edit_comp (editor, comp);

    gtk_window_present (GTK_WINDOW (editor));

    g_object_unref (comp);
    g_object_unref (cal);
}

static void
action_task_new_cb (GtkAction *action,
                    EShellWindow *shell_window)
{
    ECal *cal = NULL;
    ECalSourceType source_type;
    ESourceList *source_list;
    EShellSettings *shell_settings;
    EShell *shell;
    const gchar *action_name;
    gchar *uid;

    /* This callback is used for both tasks and assigned tasks. */

    source_type = E_CAL_SOURCE_TYPE_TODO;

    shell = e_shell_window_get_shell (shell_window);
    shell_settings = e_shell_get_shell_settings (shell);

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

    uid = e_shell_settings_get_string (
        shell_settings, "cal-primary-task-list");

    if (uid != NULL) {
        ESource *source;

        source = e_source_list_peek_source_by_uid (source_list, uid);
        if (source != NULL)
            cal = e_auth_new_cal_from_source (source, source_type);
        g_free (uid);
    }

    if (cal == NULL)
        cal = e_auth_new_cal_from_default (source_type);

    g_return_if_fail (cal != NULL);

    /* Connect the appropriate signal handler. */
    action_name = gtk_action_get_name (action);
    if (strcmp (action_name, "task-assigned-new") == 0)
        g_signal_connect (
            cal, "cal-opened",
            G_CALLBACK (task_shell_backend_task_assigned_new_cb),
            shell);
    else
        g_signal_connect (
            cal, "cal-opened",
            G_CALLBACK (task_shell_backend_task_new_cb),
            shell);

    e_cal_open_async (cal, FALSE);
}

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

static GtkActionEntry item_entries[] = {

    { "task-new",
      "stock_task",
      NC_("New", "_Task"),
      "<Shift><Control>t",
      N_("Create a new task"),
      G_CALLBACK (action_task_new_cb) },

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

static GtkActionEntry source_entries[] = {

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

static gboolean
task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
                                  const gchar *uri)
{
    EShell *shell;
    CompEditor *editor;
    CompEditorFlags flags = 0;
    ECal *client;
    ECalComponent *comp;
    ESource *source;
    ESourceList *source_list;
    ECalSourceType source_type;
    EUri *euri;
    icalcomponent *icalcomp;
    icalproperty *icalprop;
    const gchar *cp;
    gchar *source_uid = NULL;
    gchar *comp_uid = NULL;
    gchar *comp_rid = NULL;
    gboolean handled = FALSE;
    GError *error = NULL;

    source_type = E_CAL_SOURCE_TYPE_TODO;
    shell = e_shell_backend_get_shell (shell_backend);

    if (strncmp (uri, "task:", 5) != 0)
        return FALSE;

    euri = e_uri_new (uri);
    cp = euri->query;
    if (cp == NULL)
        goto exit;

    while (*cp != '\0') {
        gchar *header;
        gchar *content;
        gsize header_len;
        gsize content_len;

        header_len = strcspn (cp, "=&");

        /* If it's malformed, give up. */
        if (cp[header_len] != '=')
            break;

        header = (gchar *) cp;
        header[header_len] = '\0';
        cp += header_len + 1;

        content_len = strcspn (cp, "&");

        content = g_strndup (cp, content_len);
        if (g_ascii_strcasecmp (header, "source-uid") == 0)
            source_uid = g_strdup (content);
        else if (g_ascii_strcasecmp (header, "comp-uid") == 0)
            comp_uid = g_strdup (content);
        else if (g_ascii_strcasecmp (header, "comp-rid") == 0)
            comp_rid = g_strdup (content);
        g_free (content);

        cp += content_len;
        if (*cp == '&') {
            cp++;
            if (strcmp (cp, "amp;") == 0)
                cp += 4;
        }
    }

    if (source_uid == NULL || comp_uid == NULL)
        goto exit;

    /* URI is valid, so consider it handled.  Whether
     * we successfully open it is another matter... */
    handled = TRUE;

    if (!e_cal_get_sources (&source_list, source_type, NULL)) {
        g_printerr ("Could not get task sources from GConf!\n");
        goto exit;
    }

    source = e_source_list_peek_source_by_uid (source_list, source_uid);
    if (source == NULL) {
        g_printerr ("No source for UID '%s'\n", source_uid);
        g_object_unref (source_list);
        goto exit;
    }

    client = e_auth_new_cal_from_source (source, source_type);
    if (client == NULL || !e_cal_open (client, TRUE, &error)) {
        if (error != NULL) {
            g_printerr ("%s\n", error->message);
            g_error_free (error);
        }
        g_object_unref (source_list);
        goto exit;
    }

    /* XXX Copied from e_task_shell_view_open_task().
     *     Clearly a new utility function is needed. */

    editor = comp_editor_find_instance (comp_uid);

    if (editor != NULL)
        goto present;

    if (!e_cal_get_object (client, comp_uid, comp_rid, &icalcomp, &error)) {
        g_printerr ("%s\n", error->message);
        g_object_unref (source_list);
        g_error_free (error);
        goto exit;
    }

    comp = e_cal_component_new ();
    e_cal_component_set_icalcomponent (comp, icalcomp);

    icalprop = icalcomponent_get_first_property (
        icalcomp, ICAL_ATTENDEE_PROPERTY);
    if (icalprop != NULL)
        flags |= COMP_EDITOR_IS_ASSIGNED;

    if (itip_organizer_is_user (comp, client))
        flags |= COMP_EDITOR_USER_ORG;

    if (!e_cal_component_has_attendees (comp))
        flags |= COMP_EDITOR_USER_ORG;

    editor = task_editor_new (client, shell, flags);
    comp_editor_edit_comp (editor, comp);

    g_object_unref (comp);

present:
    gtk_window_present (GTK_WINDOW (editor));

    g_object_unref (source_list);
    g_object_unref (client);

exit:
    g_free (source_uid);
    g_free (comp_uid);
    g_free (comp_rid);

    e_uri_free (euri);

    return handled;
}

static void
task_shell_backend_window_created_cb (EShellBackend *shell_backend,
                                      GtkWindow *window)
{
    const gchar *module_name;

    if (!E_IS_SHELL_WINDOW (window))
        return;

    module_name = E_SHELL_BACKEND_GET_CLASS (shell_backend)->name;

    e_shell_window_register_new_item_actions (
        E_SHELL_WINDOW (window), module_name,
        item_entries, G_N_ELEMENTS (item_entries));

    e_shell_window_register_new_source_actions (
        E_SHELL_WINDOW (window), module_name,
        source_entries, G_N_ELEMENTS (source_entries));
}

static void
task_shell_backend_get_property (GObject *object,
                                 guint property_id,
                                 GValue *value,
                                 GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SOURCE_LIST:
            g_value_set_object (
                value,
                e_task_shell_backend_get_source_list (
                E_TASK_SHELL_BACKEND (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
task_shell_backend_dispose (GObject *object)
{
    ETaskShellBackendPrivate *priv;

    priv = E_TASK_SHELL_BACKEND_GET_PRIVATE (object);

    if (priv->source_list != NULL) {
        g_object_unref (priv->source_list);
        priv->source_list = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (parent_class)->dispose (object);
}

static void
task_shell_backend_constructed (GObject *object)
{
    EShell *shell;
    EShellBackend *shell_backend;

    shell_backend = E_SHELL_BACKEND (object);
    shell = e_shell_backend_get_shell (shell_backend);

    task_shell_backend_ensure_sources (shell_backend);

    g_signal_connect_swapped (
        shell, "handle-uri",
        G_CALLBACK (task_shell_backend_handle_uri_cb),
        shell_backend);

    g_signal_connect_swapped (
        shell, "window-created",
        G_CALLBACK (task_shell_backend_window_created_cb),
        shell_backend);
}

static void
task_shell_backend_class_init (ETaskShellBackendClass *class)
{
    GObjectClass *object_class;
    EShellBackendClass *shell_backend_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (ETaskShellBackendPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->get_property = task_shell_backend_get_property;
    object_class->dispose = task_shell_backend_dispose;
    object_class->constructed = task_shell_backend_constructed;

    shell_backend_class = E_SHELL_BACKEND_CLASS (class);
    shell_backend_class->shell_view_type = E_TYPE_TASK_SHELL_VIEW;
    shell_backend_class->name = "tasks";
    shell_backend_class->aliases = "";
    shell_backend_class->schemes = "task";
    shell_backend_class->sort_order = 500;
    shell_backend_class->preferences_page = "calendar-and-tasks";
    shell_backend_class->start = NULL;
    shell_backend_class->migrate = e_task_shell_backend_migrate;

    g_object_class_install_property (
        object_class,
        PROP_SOURCE_LIST,
        g_param_spec_object (
            "source-list",
            "Source List",
            "The registry of task lists",
            E_TYPE_SOURCE_LIST,
            G_PARAM_READABLE));
}

static void
task_shell_backend_init (ETaskShellBackend *task_shell_backend)
{
    task_shell_backend->priv =
        E_TASK_SHELL_BACKEND_GET_PRIVATE (task_shell_backend);
}

GType
e_task_shell_backend_get_type (void)
{
    return task_shell_backend_type;
}

void
e_task_shell_backend_register_type (GTypeModule *type_module)
{
    const GTypeInfo type_info = {
        sizeof (ETaskShellBackendClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) task_shell_backend_class_init,
        (GClassFinalizeFunc) NULL,
        NULL,  /* class_data */
        sizeof (ETaskShellBackend),
        0,     /* n_preallocs */
        (GInstanceInitFunc) task_shell_backend_init,
        NULL   /* value_table */
    };

    task_shell_backend_type = g_type_module_register_type (
        type_module, E_TYPE_SHELL_BACKEND,
        "ETaskShellBackend", &type_info, 0);
}

ESourceList *
e_task_shell_backend_get_source_list (ETaskShellBackend *task_shell_backend)
{
    g_return_val_if_fail (
        E_IS_TASK_SHELL_BACKEND (task_shell_backend), NULL);

    return task_shell_backend->priv->source_list;
}