path: root/calendar/gui/e-meeting-store.c

/*
 * e-meeting-store.c
 *
 * Copyright (C) 2001-2003  Ximian, Inc.
 *
 * Authors: JP Rosevear  <jpr@ximian.com>
 *      Mike Kestner  <mkestner@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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib.h>
#include <glib/gi18n.h>
#include <libgnome/gnome-util.h>
#include <libgnomevfs/gnome-vfs.h>
#include <libecal/e-cal-component.h>
#include <libecal/e-cal-util.h>
#include <libecal/e-cal-time-util.h>
#include <libedataserver/e-data-server-util.h>
#include "calendar-config.h"
#include "itip-utils.h"
#include "e-meeting-utils.h"
#include "e-meeting-attendee.h"
#include "e-meeting-store.h"

#define ROW_VALID(store, row) (row >= 0 && row < store->priv->attendees->len)

struct _EMeetingStorePrivate {
    GPtrArray *attendees;
    gint stamp;

    ECal *client;
    icaltimezone *zone;

    char *fb_uri;

    GPtrArray *refresh_queue;
    GHashTable *refresh_data;
    GMutex *mutex;
    guint refresh_idle_id;

    guint num_threads;
    guint num_queries;
};

#define BUF_SIZE 1024

typedef struct _EMeetingStoreQueueData EMeetingStoreQueueData;
struct _EMeetingStoreQueueData {
    EMeetingStore *store;
    EMeetingAttendee *attendee;

    gboolean refreshing;

    EMeetingTime start;
    EMeetingTime end;

    char buffer[BUF_SIZE];
    GString *string;

    GPtrArray *call_backs;
    GPtrArray *data;
};


static GObjectClass *parent_class = NULL;

static void start_async_read (GnomeVFSAsyncHandle *handle, GnomeVFSResult result, gpointer data);

static icalparameter_cutype
text_to_type (const char *type)
{
    if (!e_util_utf8_strcasecmp (type, _("Individual")))
        return ICAL_CUTYPE_INDIVIDUAL;
    else if (!e_util_utf8_strcasecmp (type, _("Group")))
        return ICAL_CUTYPE_GROUP;
    else if (!e_util_utf8_strcasecmp (type, _("Resource")))
        return ICAL_CUTYPE_RESOURCE;
    else if (!e_util_utf8_strcasecmp (type, _("Room")))
        return ICAL_CUTYPE_ROOM;
    else
        return ICAL_CUTYPE_NONE;
}

static char *
type_to_text (icalparameter_cutype type)
{
    switch (type) {
    case ICAL_CUTYPE_INDIVIDUAL:
        return _("Individual");
    case ICAL_CUTYPE_GROUP:
        return _("Group");
    case ICAL_CUTYPE_RESOURCE:
        return _("Resource");
    case ICAL_CUTYPE_ROOM:
        return _("Room");
    default:
        return _("Unknown");
    }

    return NULL;

}

static icalparameter_role
text_to_role (const char *role)
{
    if (!e_util_utf8_strcasecmp (role, _("Chair")))
        return ICAL_ROLE_CHAIR;
    else if (!e_util_utf8_strcasecmp (role, _("Required Participant")))
        return ICAL_ROLE_REQPARTICIPANT;
    else if (!e_util_utf8_strcasecmp (role, _("Optional Participant")))
        return ICAL_ROLE_OPTPARTICIPANT;
    else if (!e_util_utf8_strcasecmp (role, _("Non-Participant")))
        return ICAL_ROLE_NONPARTICIPANT;
    else
        return ICAL_ROLE_NONE;
}

static char *
role_to_text (icalparameter_role role)
{
    switch (role) {
    case ICAL_ROLE_CHAIR:
        return _("Chair");
    case ICAL_ROLE_REQPARTICIPANT:
        return _("Required Participant");
    case ICAL_ROLE_OPTPARTICIPANT:
        return _("Optional Participant");
    case ICAL_ROLE_NONPARTICIPANT:
        return _("Non-Participant");
    default:
        return _("Unknown");
    }
}

static gboolean
text_to_boolean (const char *role)
{
    if (!e_util_utf8_strcasecmp (role, _("Yes")))
        return TRUE;
    else
        return FALSE;
}

static char *
boolean_to_text (gboolean b)
{
    if (b)
        return _("Yes");
    else
        return _("No");
}

static icalparameter_partstat
text_to_partstat (const char *partstat)
{
    if (!e_util_utf8_strcasecmp (partstat, _("Needs Action")))
        return ICAL_PARTSTAT_NEEDSACTION;
    else if (!e_util_utf8_strcasecmp (partstat, _("Accepted")))
        return ICAL_PARTSTAT_ACCEPTED;
    else if (!e_util_utf8_strcasecmp (partstat, _("Declined")))
        return ICAL_PARTSTAT_DECLINED;
    else if (!e_util_utf8_strcasecmp (partstat, _("Tentative")))
        return ICAL_PARTSTAT_TENTATIVE;
    else if (!e_util_utf8_strcasecmp (partstat, _("Delegated")))
        return ICAL_PARTSTAT_DELEGATED;
    else if (!e_util_utf8_strcasecmp (partstat, _("Completed")))
        return ICAL_PARTSTAT_COMPLETED;
    else if (!e_util_utf8_strcasecmp (partstat, _("In Process")))
        return ICAL_PARTSTAT_INPROCESS;
    else
        return ICAL_PARTSTAT_NONE;
}

static char *
partstat_to_text (icalparameter_partstat partstat)
{
    switch (partstat) {
    case ICAL_PARTSTAT_NEEDSACTION:
        return _("Needs Action");
    case ICAL_PARTSTAT_ACCEPTED:
        return _("Accepted");
    case ICAL_PARTSTAT_DECLINED:
        return _("Declined");
    case ICAL_PARTSTAT_TENTATIVE:
        return _("Tentative");
    case ICAL_PARTSTAT_DELEGATED:
        return _("Delegated");
    case ICAL_PARTSTAT_COMPLETED:
        return _("Completed");
    case ICAL_PARTSTAT_INPROCESS:
        return _("In Process");
    case ICAL_PARTSTAT_NONE:
    default:
        return _("Unknown");
    }
}

static GtkTreeModelFlags
get_flags (GtkTreeModel *model)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (model), 0);

    return GTK_TREE_MODEL_ITERS_PERSIST | GTK_TREE_MODEL_LIST_ONLY;
}

static int
get_n_columns (GtkTreeModel *model)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (model), 0);

    return E_MEETING_STORE_COLUMN_COUNT;
}

static GType
get_column_type (GtkTreeModel *model, int col)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (model), G_TYPE_INVALID);

    switch (col) {
    case E_MEETING_STORE_ADDRESS_COL:
    case E_MEETING_STORE_MEMBER_COL:
    case E_MEETING_STORE_TYPE_COL:
    case E_MEETING_STORE_ROLE_COL:
    case E_MEETING_STORE_RSVP_COL:
    case E_MEETING_STORE_DELTO_COL:
    case E_MEETING_STORE_DELFROM_COL:
    case E_MEETING_STORE_STATUS_COL:
    case E_MEETING_STORE_CN_COL:
    case E_MEETING_STORE_LANGUAGE_COL:
    case E_MEETING_STORE_ATTENDEE_COL:
        return G_TYPE_STRING;
    case E_MEETING_STORE_ATTENDEE_UNDERLINE_COL:
        return PANGO_TYPE_UNDERLINE;
    default:
        return G_TYPE_INVALID;
    }
}

static gboolean
get_iter (GtkTreeModel *model, GtkTreeIter *iter, GtkTreePath *path)
{
    int row;

    g_return_val_if_fail (E_IS_MEETING_STORE (model), FALSE);
    g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);

    row = gtk_tree_path_get_indices (path) [0];

    if (!ROW_VALID (E_MEETING_STORE (model), row))
           return FALSE;

    iter->stamp = E_MEETING_STORE (model)->priv->stamp;
    iter->user_data = GINT_TO_POINTER (row);

    return TRUE;
}

static GtkTreePath *
get_path (GtkTreeModel *model, GtkTreeIter *iter)
{
    int row;
    GtkTreePath *result;

    g_return_val_if_fail (E_IS_MEETING_STORE (model), NULL);
    g_return_val_if_fail (iter->stamp == E_MEETING_STORE (model)->priv->stamp, NULL);

    row = GPOINTER_TO_INT (iter->user_data);

    g_return_val_if_fail (ROW_VALID (E_MEETING_STORE (model), row), NULL);

    result = gtk_tree_path_new ();
    gtk_tree_path_append_index (result, row);
    return result;
}

static void
get_value (GtkTreeModel *model, GtkTreeIter *iter, int col, GValue *value)
{
    EMeetingStore *store;
    EMeetingAttendee *attendee;
    const gchar *cn;
    int row;

    g_return_if_fail (E_IS_MEETING_STORE (model));
    g_return_if_fail (col >= 0 && col < E_MEETING_STORE_COLUMN_COUNT);

    row = GPOINTER_TO_INT (iter->user_data);
    store = E_MEETING_STORE (model);

    g_return_if_fail (iter->stamp == store->priv->stamp);
    g_return_if_fail (ROW_VALID (E_MEETING_STORE (model), row));

    attendee = g_ptr_array_index (store->priv->attendees, row);

    switch (col) {
    case E_MEETING_STORE_ADDRESS_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));
        break;
    case E_MEETING_STORE_MEMBER_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, e_meeting_attendee_get_member (attendee));
        break;
    case E_MEETING_STORE_TYPE_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, type_to_text (e_meeting_attendee_get_cutype (attendee)));
        break;
    case E_MEETING_STORE_ROLE_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, role_to_text (e_meeting_attendee_get_role (attendee)));
        break;
    case E_MEETING_STORE_RSVP_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, boolean_to_text (e_meeting_attendee_get_rsvp (attendee)));
        break;
    case E_MEETING_STORE_DELTO_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, itip_strip_mailto (e_meeting_attendee_get_delto (attendee)));
        break;
    case E_MEETING_STORE_DELFROM_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, itip_strip_mailto (e_meeting_attendee_get_delfrom (attendee)));
        break;
    case E_MEETING_STORE_STATUS_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, partstat_to_text (e_meeting_attendee_get_status (attendee)));
        break;
    case E_MEETING_STORE_CN_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, e_meeting_attendee_get_cn (attendee));
        break;
    case E_MEETING_STORE_LANGUAGE_COL:
        g_value_init (value, G_TYPE_STRING);
        g_value_set_string (value, e_meeting_attendee_get_language (attendee));
        break;
    case E_MEETING_STORE_ATTENDEE_COL:
        g_value_init (value, G_TYPE_STRING);
        cn = e_meeting_attendee_get_cn (attendee);
        if (strcmp (cn, ""))
            g_value_set_string (value, cn);
        else
            g_value_set_string (value, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));
        break;
    case E_MEETING_STORE_ATTENDEE_UNDERLINE_COL:
        cn = e_meeting_attendee_get_cn (attendee);
        g_value_init (value, PANGO_TYPE_UNDERLINE);
        g_value_set_enum (value, strcmp ("", cn) == 0 ? PANGO_UNDERLINE_NONE : PANGO_UNDERLINE_SINGLE);
    }
}

static gboolean
iter_next (GtkTreeModel *model, GtkTreeIter *iter)
{
    int row;

    g_return_val_if_fail (E_IS_MEETING_STORE (model), FALSE);
    g_return_val_if_fail (iter->stamp == E_MEETING_STORE (model)->priv->stamp, FALSE);

    row = GPOINTER_TO_INT (iter->user_data) + 1;
    iter->user_data = GINT_TO_POINTER (row);

    return ROW_VALID (E_MEETING_STORE (model), row);
}

static gboolean
iter_children (GtkTreeModel *model, GtkTreeIter *iter, GtkTreeIter *parent)
{
    EMeetingStore *store;

    g_return_val_if_fail (E_IS_MEETING_STORE (model), FALSE);

    store = E_MEETING_STORE (model);

    if (parent || store->priv->attendees->len <= 0)
        return FALSE;

    iter->stamp = store->priv->stamp;
    iter->user_data = GINT_TO_POINTER (0);

    return TRUE;
}

static gboolean
iter_has_child (GtkTreeModel *model, GtkTreeIter *iter)
{
    return FALSE;
}

static int
iter_n_children (GtkTreeModel *model, GtkTreeIter *iter)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (model), -1);

    if (!iter)
        return E_MEETING_STORE (model)->priv->attendees->len;

    g_return_val_if_fail (iter->stamp == E_MEETING_STORE (model)->priv->stamp, -1);

    return 0;
}

static gboolean
iter_nth_child (GtkTreeModel *model, GtkTreeIter *iter, GtkTreeIter *parent, int n)
{
    EMeetingStore *store;

    g_return_val_if_fail (E_IS_MEETING_STORE (model), FALSE);

    store = E_MEETING_STORE (model);

    if (parent || !ROW_VALID (store, n))
        return FALSE;

    iter->stamp = store->priv->stamp;
    iter->user_data = GINT_TO_POINTER (n);

    return TRUE;
}

static gboolean
iter_parent (GtkTreeModel *model, GtkTreeIter *iter, GtkTreeIter *child)
{
    return FALSE;
}

static void
ems_tree_model_init (GtkTreeModelIface *iface)
{
    iface->get_flags = get_flags;
    iface->get_n_columns = get_n_columns;
    iface->get_column_type = get_column_type;
    iface->get_iter = get_iter;
    iface->get_path = get_path;
    iface->get_value = get_value;
    iface->iter_next = iter_next;
    iface->iter_children = iter_children;
    iface->iter_has_child = iter_has_child;
    iface->iter_n_children = iter_n_children;
    iface->iter_nth_child = iter_nth_child;
    iface->iter_parent = iter_parent;
}

void
e_meeting_store_set_value (EMeetingStore *store, int row, int col, const gchar *val)
{
    icalparameter_cutype type;
    EMeetingAttendee *attendee = g_ptr_array_index (store->priv->attendees, row);

    switch (col) {
    case E_MEETING_STORE_ADDRESS_COL:
        if (val != NULL && *((char *)val))
            e_meeting_attendee_set_address (attendee, g_strdup_printf ("MAILTO:%s", (char *) val));
        break;
    case E_MEETING_STORE_MEMBER_COL:
        e_meeting_attendee_set_member (attendee, g_strdup (val));
        break;
    case E_MEETING_STORE_TYPE_COL:
        type = text_to_type (val);
        e_meeting_attendee_set_cutype (attendee, text_to_type (val));
        if (type == ICAL_CUTYPE_RESOURCE) {
            e_meeting_attendee_set_role (attendee, ICAL_ROLE_NONPARTICIPANT);
        }
        break;
    case E_MEETING_STORE_ROLE_COL:
        e_meeting_attendee_set_role (attendee, text_to_role (val));
        break;
    case E_MEETING_STORE_RSVP_COL:
        e_meeting_attendee_set_rsvp (attendee, text_to_boolean (val));
        break;
    case E_MEETING_STORE_DELTO_COL:
        e_meeting_attendee_set_delto (attendee, g_strdup (val));
        break;
    case E_MEETING_STORE_DELFROM_COL:
        e_meeting_attendee_set_delfrom (attendee, g_strdup (val));
        break;
    case E_MEETING_STORE_STATUS_COL:
        e_meeting_attendee_set_status (attendee, text_to_partstat (val));
        break;
    case E_MEETING_STORE_CN_COL:
        e_meeting_attendee_set_cn (attendee, g_strdup (val));
        break;
    case E_MEETING_STORE_LANGUAGE_COL:
        e_meeting_attendee_set_language (attendee, g_strdup (val));
        break;
    }
}

static void
refresh_queue_remove (EMeetingStore *store, EMeetingAttendee *attendee)
{
    EMeetingStorePrivate *priv;
    EMeetingStoreQueueData *qdata;

    priv = store->priv;

    /* Free the queue data */
    qdata = g_hash_table_lookup (priv->refresh_data, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));
    if (qdata) {
        g_mutex_lock (priv->mutex);
        g_hash_table_remove (priv->refresh_data, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));
        g_mutex_unlock (priv->mutex);
        g_ptr_array_free (qdata->call_backs, TRUE);
        g_ptr_array_free (qdata->data, TRUE);
        g_free (qdata);
    }

    /* Unref the attendee */
    g_ptr_array_remove (priv->refresh_queue, attendee);
    g_object_unref (attendee);
}

static void
ems_finalize (GObject *obj)
{
    EMeetingStore *store = E_MEETING_STORE (obj);
    EMeetingStorePrivate *priv;
    int i;

    priv = store->priv;

    for (i = 0; i < priv->attendees->len; i++)
        g_object_unref (g_ptr_array_index (priv->attendees, i));
    g_ptr_array_free (priv->attendees, TRUE);

    if (priv->client != NULL)
        g_object_unref (priv->client);

    while (priv->refresh_queue->len > 0)
        refresh_queue_remove (store, g_ptr_array_index (priv->refresh_queue, 0));
    g_ptr_array_free (priv->refresh_queue, TRUE);
    g_hash_table_destroy (priv->refresh_data);

    if (priv->refresh_idle_id)
        g_source_remove (priv->refresh_idle_id);

    g_free (priv->fb_uri);

    g_mutex_free (priv->mutex);

    g_free (priv);

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

static void
ems_class_init (GObjectClass *klass)
{
    parent_class = g_type_class_peek_parent (klass);

    klass->finalize = ems_finalize;
}


static void
ems_init (EMeetingStore *store)
{
    EMeetingStorePrivate *priv;

    priv = g_new0 (EMeetingStorePrivate, 1);

    store->priv = priv;

    priv->attendees = g_ptr_array_new ();

    priv->zone = calendar_config_get_icaltimezone ();

    priv->fb_uri = calendar_config_get_free_busy_template ();

    priv->refresh_queue = g_ptr_array_new ();
    priv->refresh_data = g_hash_table_new (g_str_hash, g_str_equal);

    priv->mutex = g_mutex_new ();

    priv->num_queries = 0;
}

GType
e_meeting_store_get_type (void)
{
    static GType ems_type = 0;

    if (!ems_type) {
        static const GTypeInfo ems_info = {
                sizeof (EMeetingStoreClass),
                NULL,           /* base_init */
                NULL,           /* base_finalize */
                (GClassInitFunc) ems_class_init,
                NULL,           /* class_finalize */
                NULL,           /* class_data */
                sizeof (EMeetingStore),
                0,
                (GInstanceInitFunc) ems_init };

        static const GInterfaceInfo tree_model_info = {
                (GInterfaceInitFunc) ems_tree_model_init,
                NULL,
                NULL };

        ems_type = g_type_register_static (GTK_TYPE_LIST_STORE,
                           "EMeetingStore",
                           &ems_info, 0);

        g_type_add_interface_static (ems_type,
                         GTK_TYPE_TREE_MODEL,
                         &tree_model_info);
    }

    return ems_type;
}

GObject *
e_meeting_store_new (void)
{
    return g_object_new (E_TYPE_MEETING_STORE, NULL);
}


ECal *
e_meeting_store_get_e_cal (EMeetingStore *store)
{
    return store->priv->client;
}

void
e_meeting_store_set_e_cal (EMeetingStore *store, ECal *client)
{
    if (store->priv->client != NULL)
        g_object_unref (store->priv->client);

    if (client != NULL)
        g_object_ref (client);
    store->priv->client = client;
}

icaltimezone *
e_meeting_store_get_zone (EMeetingStore *store)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), NULL);

    return store->priv->zone;
}

void
e_meeting_store_set_zone (EMeetingStore *store, icaltimezone *zone)
{
    g_return_if_fail (E_IS_MEETING_STORE (store));

    store->priv->zone = zone;
}

gchar *
e_meeting_store_get_fb_uri (EMeetingStore *store)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), NULL);

    return g_strdup (store->priv->fb_uri);
}

void
e_meeting_store_set_fb_uri (EMeetingStore *store, const gchar *fb_uri)
{
    g_return_if_fail (E_IS_MEETING_STORE (store));

    g_free (store->priv->fb_uri);
    store->priv->fb_uri = g_strdup (fb_uri);
}

static void
attendee_changed_cb (EMeetingAttendee *attendee, gpointer data)
{
    EMeetingStore *store = E_MEETING_STORE (data);
    GtkTreePath *path;
    GtkTreeIter iter;
    gint row = -1, i;

    for (i = 0; i < store->priv->attendees->len; i++) {
        if (attendee == g_ptr_array_index (store->priv->attendees, i)) {
            row = i;
            break;
        }
    }

    if (row == -1)
        return;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, row);
    get_iter (GTK_TREE_MODEL (store), &iter, path);
    gtk_tree_model_row_changed (GTK_TREE_MODEL (store), path, &iter);
    gtk_tree_path_free (path);
}

void
e_meeting_store_add_attendee (EMeetingStore *store, EMeetingAttendee *attendee)
{
    GtkTreePath *path;
    GtkTreeIter iter;

    g_return_if_fail (E_IS_MEETING_STORE (store));

    g_object_ref (attendee);
    g_ptr_array_add (store->priv->attendees, attendee);

    g_signal_connect (attendee, "changed", G_CALLBACK (attendee_changed_cb), store);

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, store->priv->attendees->len - 1);
    get_iter (GTK_TREE_MODEL (store), &iter, path);
    gtk_tree_model_row_inserted (GTK_TREE_MODEL (store), path, &iter);
    gtk_tree_path_free (path);
}

EMeetingAttendee *
e_meeting_store_add_attendee_with_defaults (EMeetingStore *store)
{
    EMeetingAttendee *attendee;
    char *str;

    attendee = E_MEETING_ATTENDEE (e_meeting_attendee_new ());

    e_meeting_attendee_set_address (attendee, g_strdup (""));
    e_meeting_attendee_set_member (attendee, g_strdup (""));

    str = g_strdup (_("Individual"));
    e_meeting_attendee_set_cutype (attendee, text_to_type (str));
    g_free (str);
    str = g_strdup (_("Required Participant"));
    e_meeting_attendee_set_role (attendee, text_to_role (str));
    g_free (str);
    str = g_strdup (_("Yes"));
    e_meeting_attendee_set_rsvp (attendee, text_to_boolean (str));
    g_free (str);

    e_meeting_attendee_set_delto (attendee, g_strdup (""));
    e_meeting_attendee_set_delfrom (attendee, g_strdup (""));

    str = g_strdup (_("Needs Action"));
    e_meeting_attendee_set_status (attendee, text_to_partstat (str));
    g_free (str);

    e_meeting_attendee_set_cn (attendee, g_strdup (""));
    e_meeting_attendee_set_language (attendee, g_strdup ("en"));

    e_meeting_store_add_attendee (store, attendee);

    return attendee;
}

void
e_meeting_store_remove_attendee (EMeetingStore *store, EMeetingAttendee *attendee)
{
    gint i, row = -1;
    GtkTreePath *path;

    for (i = 0; i < store->priv->attendees->len; i++) {
        if (attendee == g_ptr_array_index (store->priv->attendees, i)) {
            row = i;
            break;
        }
    }

    if (row != -1) {
        path = gtk_tree_path_new ();
        gtk_tree_path_append_index (path, row);
        gtk_tree_model_row_deleted (GTK_TREE_MODEL (store), path);
        gtk_tree_path_free (path);

        g_ptr_array_remove_index (store->priv->attendees, row);     
        g_object_unref (attendee);
    }
}

void
e_meeting_store_remove_all_attendees (EMeetingStore *store)
{
    gint i;
    GtkTreePath *path = gtk_tree_path_new ();

    gtk_tree_path_append_index (path, 0);

    for (i = 0; i < store->priv->attendees->len; i++) {
        EMeetingAttendee *attendee = g_ptr_array_index (store->priv->attendees, i);

        gtk_tree_model_row_deleted (GTK_TREE_MODEL (store), path);
        gtk_tree_path_next (path);

        g_object_unref (attendee);
    }

    g_ptr_array_set_size (store->priv->attendees, 0);
    gtk_tree_path_free (path);
}

EMeetingAttendee *
e_meeting_store_find_attendee (EMeetingStore *store, const gchar *address, gint *row)
{
    EMeetingAttendee *attendee;
    int i;

    if (address == NULL)
        return NULL;

    for (i = 0; i < store->priv->attendees->len; i++) {
        const gchar *attendee_address;

        attendee = g_ptr_array_index (store->priv->attendees, i);

        attendee_address = e_meeting_attendee_get_address (attendee);
        if (attendee_address && !g_ascii_strcasecmp (itip_strip_mailto (attendee_address), itip_strip_mailto (address))) {
            if (row != NULL)
                *row = i;

            return attendee;
        }
    }

    return NULL;
}

EMeetingAttendee *
e_meeting_store_find_attendee_at_row (EMeetingStore *store, gint row)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), NULL);
    g_return_val_if_fail (ROW_VALID (store, row), NULL);

    return g_ptr_array_index (store->priv->attendees, row);
}

GtkTreePath *
e_meeting_store_find_attendee_path (EMeetingStore *store, EMeetingAttendee *attendee)
{
    GtkTreePath *path;
    gint row = -1, i;

    for (i = 0; i < store->priv->attendees->len; i++) {
        if (attendee == g_ptr_array_index (store->priv->attendees, i)) {
            row = i;
            break;
        }
    }

    if (row == -1)
        return NULL;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, row);

    return path;
}

gint
e_meeting_store_count_actual_attendees (EMeetingStore *store)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), 0);

    return store->priv->attendees->len;
}

const GPtrArray *
e_meeting_store_get_attendees (EMeetingStore *store)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), NULL);

    return store->priv->attendees;
}

static icaltimezone *
find_zone (icalproperty *ip, icalcomponent *tz_top_level)
{
    icalparameter *param;
    icalcomponent *sub_comp;
    const char *tzid;
    icalcompiter iter;

    if (tz_top_level == NULL)
        return NULL;

    param = icalproperty_get_first_parameter (ip, ICAL_TZID_PARAMETER);
    if (param == NULL)
        return NULL;
    tzid = icalparameter_get_tzid (param);

    iter = icalcomponent_begin_component (tz_top_level, ICAL_VTIMEZONE_COMPONENT);
    while ((sub_comp = icalcompiter_deref (&iter)) != NULL) {
        icalcomponent *clone;
        icalproperty *prop;
        const char *tz_tzid;

        prop = icalcomponent_get_first_property (sub_comp, ICAL_TZID_PROPERTY);
        tz_tzid = icalproperty_get_tzid (prop);
        if (!strcmp (tzid, tz_tzid)) {
            icaltimezone *zone;

            zone = icaltimezone_new ();
            clone = icalcomponent_new_clone (sub_comp);
            icaltimezone_set_component (zone, clone);

            return zone;
        }

        icalcompiter_next (&iter);
    }

    return NULL;
}

static void
process_callbacks (EMeetingStoreQueueData *qdata)
{
    EMeetingStore *store;
    int i;

    store = qdata->store;

    for (i = 0; i < qdata->call_backs->len; i++) {
        EMeetingStoreRefreshCallback call_back;
        gpointer *data = NULL;

        call_back = g_ptr_array_index (qdata->call_backs, i);
        data = g_ptr_array_index (qdata->data, i);

        g_idle_add ((GSourceFunc) call_back, data);
    }

    g_mutex_lock (store->priv->mutex);
    store->priv->num_threads--;
    g_mutex_unlock (store->priv->mutex);

    refresh_queue_remove (qdata->store, qdata->attendee);
    g_object_unref (store);
}

static void
process_free_busy_comp (EMeetingAttendee *attendee,
            icalcomponent *fb_comp,
            icaltimezone *zone,
            icalcomponent *tz_top_level)
{
    icalproperty *ip;

    ip = icalcomponent_get_first_property (fb_comp, ICAL_DTSTART_PROPERTY);
    if (ip != NULL) {
        struct icaltimetype dtstart;
        icaltimezone *ds_zone;

        dtstart = icalproperty_get_dtstart (ip);
        if (!dtstart.is_utc)
            ds_zone = find_zone (ip, tz_top_level);
        else
            ds_zone = icaltimezone_get_utc_timezone ();
        icaltimezone_convert_time (&dtstart, ds_zone, zone);
        e_meeting_attendee_set_start_busy_range (attendee,
                             dtstart.year,
                             dtstart.month,
                             dtstart.day,
                             dtstart.hour,
                             dtstart.minute);
    }

    ip = icalcomponent_get_first_property (fb_comp, ICAL_DTEND_PROPERTY);
    if (ip != NULL) {
        struct icaltimetype dtend;
        icaltimezone *de_zone;

        dtend = icalproperty_get_dtend (ip);
        if (!dtend.is_utc)
            de_zone = find_zone (ip, tz_top_level);
        else
            de_zone = icaltimezone_get_utc_timezone ();
        icaltimezone_convert_time (&dtend, de_zone, zone);
        e_meeting_attendee_set_end_busy_range (attendee,
                               dtend.year,
                               dtend.month,
                               dtend.day,
                               dtend.hour,
                               dtend.minute);
    }

    ip = icalcomponent_get_first_property (fb_comp, ICAL_FREEBUSY_PROPERTY);
    while (ip != NULL) {
        icalparameter *param;
        struct icalperiodtype fb;
        EMeetingFreeBusyType busy_type = E_MEETING_FREE_BUSY_LAST;
        icalparameter_fbtype fbtype = ICAL_FBTYPE_BUSY;

        fb = icalproperty_get_freebusy (ip);
        param = icalproperty_get_first_parameter (ip, ICAL_FBTYPE_PARAMETER);
        if (param != NULL)
            fbtype =  icalparameter_get_fbtype (param);

        switch (fbtype) {
        case ICAL_FBTYPE_BUSY:
            busy_type = E_MEETING_FREE_BUSY_BUSY;
            break;

        case ICAL_FBTYPE_BUSYUNAVAILABLE:
            busy_type = E_MEETING_FREE_BUSY_OUT_OF_OFFICE;
            break;

        case ICAL_FBTYPE_BUSYTENTATIVE:
            busy_type = E_MEETING_FREE_BUSY_TENTATIVE;
            break;

        default:
            break;
        }

        if (busy_type != E_MEETING_FREE_BUSY_LAST) {
            icaltimezone *utc_zone = icaltimezone_get_utc_timezone ();

            icaltimezone_convert_time (&fb.start, utc_zone, zone);
            icaltimezone_convert_time (&fb.end, utc_zone, zone);
            e_meeting_attendee_add_busy_period (attendee,
                                fb.start.year,
                                fb.start.month,
                                fb.start.day,
                                fb.start.hour,
                                fb.start.minute,
                                fb.end.year,
                                fb.end.month,
                                fb.end.day,
                                fb.end.hour,
                                fb.end.minute,
                                busy_type);
        }

        ip = icalcomponent_get_next_property (fb_comp, ICAL_FREEBUSY_PROPERTY);
    }
}

static void
process_free_busy (EMeetingStoreQueueData *qdata, char *text)
{
    EMeetingStore *store = qdata->store;
    EMeetingStorePrivate *priv;
    EMeetingAttendee *attendee = qdata->attendee;
    icalcomponent *main_comp;
    icalcomponent_kind kind = ICAL_NO_COMPONENT;

    priv = store->priv;

    main_comp = icalparser_parse_string (text);
    if (main_comp == NULL) {
        process_callbacks (qdata);
        return;
    }

    kind = icalcomponent_isa (main_comp);
    if (kind == ICAL_VCALENDAR_COMPONENT) {
        icalcompiter iter;
        icalcomponent *tz_top_level, *sub_comp;

        tz_top_level = e_cal_util_new_top_level ();

        iter = icalcomponent_begin_component (main_comp, ICAL_VTIMEZONE_COMPONENT);
        while ((sub_comp = icalcompiter_deref (&iter)) != NULL) {
            icalcomponent *clone;

            clone = icalcomponent_new_clone (sub_comp);
            icalcomponent_add_component (tz_top_level, clone);

            icalcompiter_next (&iter);
        }

        iter = icalcomponent_begin_component (main_comp, ICAL_VFREEBUSY_COMPONENT);
        while ((sub_comp = icalcompiter_deref (&iter)) != NULL) {
            process_free_busy_comp (attendee, sub_comp, priv->zone, tz_top_level);

            icalcompiter_next (&iter);
        }
        icalcomponent_free (tz_top_level);
    } else if (kind == ICAL_VFREEBUSY_COMPONENT) {
        process_free_busy_comp (attendee, main_comp, priv->zone, NULL);
    }

    icalcomponent_free (main_comp);

    process_callbacks (qdata);
}

/*
 * Replace all instances of from_value in string with to_value
 * In the returned newly allocated string.
*/
static gchar *
replace_string (gchar *string, gchar *from_value, gchar *to_value)
{
    gchar *replaced;
    gchar **split_uri;

    split_uri = g_strsplit (string, from_value, 0);
    replaced = g_strjoinv (to_value, split_uri);
    g_strfreev (split_uri);

    return replaced;
}

typedef struct {
    ECal *client;
    time_t startt;
    time_t endt;
    GList *users;
    GList *fb_data;
    char *fb_uri;
    char *email;
    EMeetingAttendee *attendee;
    EMeetingStoreQueueData *qdata;
    EMeetingStore *store;
} FreeBusyAsyncData;

#define USER_SUB   "%u"
#define DOMAIN_SUB "%d"

static gboolean
freebusy_async (gpointer data)
{
    FreeBusyAsyncData *fbd = data;
    EMeetingAttendee *attendee = fbd->attendee;
    gchar *default_fb_uri = NULL;
        char *fburi = NULL;
    static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
    EMeetingStorePrivate *priv = fbd->store->priv;
    GnomeVFSAsyncHandle *handle;

    if (fbd->client) {
        /* FIXME this a work around for getting all th free busy information for the users
         we should be able to get free busy asynchronously */
        g_static_mutex_lock (&mutex);
        priv->num_queries++;
        e_cal_get_free_busy (fbd->client, fbd->users, fbd->startt, fbd->endt, &(fbd->fb_data), NULL);
        priv->num_queries--;
        g_static_mutex_unlock (&mutex);

        g_list_foreach (fbd->users, (GFunc)g_free, NULL);
        g_list_free (fbd->users);

        if (fbd->fb_data != NULL) {
            ECalComponent *comp = fbd->fb_data->data;
            char *comp_str;

            comp_str = e_cal_component_get_as_string (comp);
            process_free_busy (fbd->qdata, comp_str);
            g_free (comp_str);

            return TRUE;
        }
    }

    /* Look for fburl's of attendee with no free busy info on server */
    if (!e_meeting_attendee_is_set_address (attendee)) {
        process_callbacks (fbd->qdata);
        return TRUE;
    }

    /* Check for free busy info on the default server */
    default_fb_uri = g_strdup (fbd->fb_uri);
    fburi = g_strdup (e_meeting_attendee_get_fburi (attendee));

    if (fburi) {
        priv->num_queries++;
        gnome_vfs_async_open (&handle, fburi, GNOME_VFS_OPEN_READ,
                      GNOME_VFS_PRIORITY_DEFAULT, start_async_read,
                      fbd->qdata);
        g_free (fburi);
    } else if (default_fb_uri != NULL && !g_str_equal (default_fb_uri, "")) {
        gchar *tmp_fb_uri;
        gchar **split_email;

        split_email = g_strsplit (fbd->email, "@", 2);

        tmp_fb_uri = replace_string (default_fb_uri, USER_SUB, split_email[0]);
        g_free (default_fb_uri);
        default_fb_uri = replace_string (tmp_fb_uri, DOMAIN_SUB, split_email[1]);

        priv->num_queries++;
        gnome_vfs_async_open (&handle, default_fb_uri, GNOME_VFS_OPEN_READ,
                      GNOME_VFS_PRIORITY_DEFAULT, start_async_read,
                      fbd->qdata);

        g_free (tmp_fb_uri);
        g_strfreev (split_email);
        g_free (default_fb_uri);
    } else {
        process_callbacks (fbd->qdata);
    }

    return TRUE;
}

#undef USER_SUB
#undef DOMAIN_SUB


static gboolean
refresh_busy_periods (gpointer data)
{
    EMeetingStore *store = E_MEETING_STORE (data);
    EMeetingStorePrivate *priv;
    EMeetingAttendee *attendee = NULL;
    EMeetingStoreQueueData *qdata = NULL;
    int i;
    GThread *thread;
    GError *error = NULL;
    FreeBusyAsyncData *fbd;

    priv = store->priv;

    /* Check to see if there are any remaining attendees in the queue */
    for (i = 0; i < priv->refresh_queue->len; i++) {
        attendee = g_ptr_array_index (priv->refresh_queue, i);
        g_return_val_if_fail (attendee != NULL, FALSE);

        qdata = g_hash_table_lookup (priv->refresh_data, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));
        if (!qdata)
            continue;

        if (!qdata->refreshing)
            break;
    }

    /* The everything in the queue is being refreshed */
    if (i >= priv->refresh_queue->len) {
        priv->refresh_idle_id = 0;
        return FALSE;
    }

    /* Indicate we are trying to refresh it */
    qdata->refreshing = TRUE;

    /* We take a ref in case we get destroyed in the gui during a callback */
    g_object_ref (qdata->store);

    fbd = g_new0 (FreeBusyAsyncData, 1);
    fbd->client = priv->client;
    fbd->attendee = attendee;
    fbd->users = NULL;
    fbd->fb_data = NULL;
    fbd->qdata = qdata;
    fbd->fb_uri = priv->fb_uri;
    fbd->store = store;
    fbd->email = g_strdup (itip_strip_mailto (e_meeting_attendee_get_address (attendee)));

    /* Check the server for free busy data */
    if (priv->client) {
        struct icaltimetype itt;

        itt = icaltime_null_time ();
        itt.year = g_date_get_year (&qdata->start.date);
        itt.month = g_date_get_month (&qdata->start.date);
        itt.day = g_date_get_day (&qdata->start.date);
        itt.hour = qdata->start.hour;
        itt.minute = qdata->start.minute;
        fbd->startt = icaltime_as_timet_with_zone (itt, priv->zone);

        itt = icaltime_null_time ();
        itt.year = g_date_get_year (&qdata->end.date);
        itt.month = g_date_get_month (&qdata->end.date);
        itt.day = g_date_get_day (&qdata->end.date);
        itt.hour = qdata->end.hour;
        itt.minute = qdata->end.minute;
        fbd->endt = icaltime_as_timet_with_zone (itt, priv->zone);
        fbd->qdata = qdata;

        fbd->users = g_list_append (fbd->users, g_strdup (fbd->email));

    }



    g_mutex_lock (store->priv->mutex);
    store->priv->num_threads++;
    g_mutex_unlock (store->priv->mutex);

    thread = g_thread_create ((GThreadFunc) freebusy_async, fbd, FALSE, &error);
    if (!thread) {
        /* do clean up stuff here */
        g_list_foreach (fbd->users, (GFunc)g_free, NULL);
        g_list_free (fbd->users);
        g_free (fbd->email);
        priv->refresh_idle_id = 0;


        g_mutex_lock (store->priv->mutex);
        store->priv->num_threads--;
        g_mutex_unlock (store->priv->mutex);

        return FALSE;
    }

    return TRUE;
}

static void
refresh_queue_add (EMeetingStore *store, int row,
           EMeetingTime *start,
           EMeetingTime *end,
           EMeetingStoreRefreshCallback call_back,
           gpointer data)
{
    EMeetingStorePrivate *priv;
    EMeetingAttendee *attendee;
    EMeetingStoreQueueData *qdata;
    int i;

    priv = store->priv;

    attendee = g_ptr_array_index (priv->attendees, row);
    if ((attendee == NULL) || !strcmp (itip_strip_mailto (e_meeting_attendee_get_address (attendee)), ""))
        return;

    /* check the queue if the attendee is already in there*/
    for (i = 0; i < priv->refresh_queue->len; i++) {
        if (attendee == g_ptr_array_index (priv->refresh_queue, i))
            return;

        if (!strcmp (e_meeting_attendee_get_address (attendee), e_meeting_attendee_get_address (g_ptr_array_index (priv->refresh_queue, i))))
            return;
    }

    g_mutex_lock (priv->mutex);
    qdata = g_hash_table_lookup (priv->refresh_data, itip_strip_mailto (e_meeting_attendee_get_address (attendee)));

    if (qdata == NULL) {
        qdata = g_new0 (EMeetingStoreQueueData, 1);

        qdata->store = store;
        qdata->attendee = attendee;
        e_meeting_attendee_clear_busy_periods (attendee);
        e_meeting_attendee_set_has_calendar_info (attendee, FALSE);

            qdata->start = *start;
            qdata->end = *end;
        qdata->string = g_string_new (NULL);
        qdata->call_backs = g_ptr_array_new ();
        qdata->data = g_ptr_array_new ();
        g_ptr_array_add (qdata->call_backs, call_back);
        g_ptr_array_add (qdata->data, data);

        g_hash_table_insert (priv->refresh_data, (void *)itip_strip_mailto (e_meeting_attendee_get_address (attendee)), qdata);
    } else {
        if (e_meeting_time_compare_times (start, &qdata->start) == -1)
            qdata->start = *start;
        if (e_meeting_time_compare_times (end, &qdata->end) == -1)
            qdata->end = *end;
        g_ptr_array_add (qdata->call_backs, call_back);
        g_ptr_array_add (qdata->data, data);
    }
    g_mutex_unlock (priv->mutex);


    g_object_ref (attendee);
    g_ptr_array_add (priv->refresh_queue, attendee);

    if (priv->refresh_idle_id == 0)
        priv->refresh_idle_id = g_idle_add (refresh_busy_periods, store);
}

static void
async_close (GnomeVFSAsyncHandle *handle,
         GnomeVFSResult result,
         gpointer data)
{
    EMeetingStoreQueueData *qdata = data;

    process_free_busy (qdata, qdata->string->str);
}

static void
async_read (GnomeVFSAsyncHandle *handle,
        GnomeVFSResult result,
        gpointer buffer,
        GnomeVFSFileSize requested,
        GnomeVFSFileSize read,
        gpointer data)
{
    EMeetingStoreQueueData *qdata = data;
    GnomeVFSFileSize buf_size = BUF_SIZE - 1;

    if (result != GNOME_VFS_OK && result != GNOME_VFS_ERROR_EOF) {
        gnome_vfs_async_close (handle, async_close, qdata);
        return;
    }

    ((char *)buffer)[read] = '\0';
    qdata->string = g_string_append (qdata->string, buffer);

    if (result == GNOME_VFS_ERROR_EOF) {
        gnome_vfs_async_close (handle, async_close, qdata);
        return;
    }

    gnome_vfs_async_read (handle, qdata->buffer, buf_size, async_read, qdata);
}

static void
start_async_read (GnomeVFSAsyncHandle *handle,
          GnomeVFSResult result,
          gpointer data)
{
    EMeetingStoreQueueData *qdata = data;
    GnomeVFSFileSize buf_size = BUF_SIZE - 1;

    qdata->store->priv->num_queries--;
    if (result != GNOME_VFS_OK) {
        g_warning ("Unable to access free/busy url: %s",
               gnome_vfs_result_to_string (result));
        process_callbacks (qdata);
        return;
    }

    gnome_vfs_async_read (handle, qdata->buffer, buf_size, async_read, qdata);
}

void
e_meeting_store_refresh_all_busy_periods (EMeetingStore *store,
                      EMeetingTime *start,
                      EMeetingTime *end,
                      EMeetingStoreRefreshCallback call_back,
                      gpointer data)
{
    int i;

    g_return_if_fail (E_IS_MEETING_STORE (store));

    for (i = 0; i < store->priv->attendees->len; i++)
        refresh_queue_add (store, i, start, end, call_back, data);
}

void
e_meeting_store_refresh_busy_periods (EMeetingStore *store,
                      int row,
                      EMeetingTime *start,
                      EMeetingTime *end,
                      EMeetingStoreRefreshCallback call_back,
                      gpointer data)
{
    g_return_if_fail (E_IS_MEETING_STORE (store));

    refresh_queue_add (store, row, start, end, call_back, data);
}

guint
e_meeting_store_get_num_queries (EMeetingStore *store)
{
    g_return_val_if_fail (E_IS_MEETING_STORE (store), 0);

    return store->priv->num_queries;
}