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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/* e-destination-store.c - EDestination store with GtkTreeModel interface.
 *
 * 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 Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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.
 *
 * Authors: Hans Petter Jansson <hpj@novell.com>
 */

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

#include <string.h>
#include <glib/gi18n-lib.h>

#include "e-destination-store.h"

#define ITER_IS_VALID(destination_store, iter) \
    ((iter)->stamp == (destination_store)->priv->stamp)
#define ITER_GET(iter) \
    GPOINTER_TO_INT (iter->user_data)
#define ITER_SET(destination_store, iter, index) \
    G_STMT_START { \
    (iter)->stamp = (destination_store)->priv->stamp; \
    (iter)->user_data = GINT_TO_POINTER (index); \
    } G_STMT_END

#define E_DESTINATION_STORE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_DESTINATION_STORE, EDestinationStorePrivate))

struct _EDestinationStorePrivate {
    GPtrArray *destinations;
    gint stamp;
};

static GType column_types[E_DESTINATION_STORE_NUM_COLUMNS];

static void e_destination_store_tree_model_init (GtkTreeModelIface *iface);

G_DEFINE_TYPE_EXTENDED (
    EDestinationStore, e_destination_store, G_TYPE_OBJECT, 0,
    G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL, e_destination_store_tree_model_init);
    column_types[E_DESTINATION_STORE_COLUMN_NAME]    = G_TYPE_STRING;
    column_types[E_DESTINATION_STORE_COLUMN_EMAIL]   = G_TYPE_STRING;
    column_types[E_DESTINATION_STORE_COLUMN_ADDRESS] = G_TYPE_STRING;
)

static GtkTreeModelFlags e_destination_store_get_flags       (GtkTreeModel       *tree_model);
static gint         e_destination_store_get_n_columns   (GtkTreeModel       *tree_model);
static GType        e_destination_store_get_column_type (GtkTreeModel       *tree_model,
                             gint                index);
static gboolean     e_destination_store_get_iter        (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter,
                             GtkTreePath        *path);
static void         e_destination_store_get_value       (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter,
                             gint                column,
                             GValue             *value);
static gboolean     e_destination_store_iter_next       (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter);
static gboolean     e_destination_store_iter_children   (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter,
                             GtkTreeIter        *parent);
static gboolean     e_destination_store_iter_has_child  (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter);
static gint         e_destination_store_iter_n_children (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter);
static gboolean     e_destination_store_iter_nth_child  (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter,
                             GtkTreeIter        *parent,
                             gint                n);
static gboolean     e_destination_store_iter_parent     (GtkTreeModel       *tree_model,
                             GtkTreeIter        *iter,
                             GtkTreeIter        *child);

static void destination_changed (EDestinationStore *destination_store, EDestination *destination);
static void stop_destination    (EDestinationStore *destination_store, EDestination *destination);

static void
destination_store_dispose (GObject *object)
{
    EDestinationStorePrivate *priv;
    gint ii;

    priv = E_DESTINATION_STORE_GET_PRIVATE (object);

    for (ii = 0; ii < priv->destinations->len; ii++) {
        EDestination *destination;

        destination = g_ptr_array_index (priv->destinations, ii);
        stop_destination (E_DESTINATION_STORE (object), destination);
        g_object_unref (destination);
    }
    g_ptr_array_set_size (priv->destinations, 0);

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

static void
destination_store_finalize (GObject *object)
{
    EDestinationStorePrivate *priv;

    priv = E_DESTINATION_STORE_GET_PRIVATE (object);

    g_ptr_array_free (priv->destinations, TRUE);

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

static void
e_destination_store_class_init (EDestinationStoreClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (EDestinationStorePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->dispose = destination_store_dispose;
    object_class->finalize = destination_store_finalize;
}

static void
e_destination_store_tree_model_init (GtkTreeModelIface *iface)
{
    iface->get_flags       = e_destination_store_get_flags;
    iface->get_n_columns   = e_destination_store_get_n_columns;
    iface->get_column_type = e_destination_store_get_column_type;
    iface->get_iter        = e_destination_store_get_iter;
    iface->get_path        = e_destination_store_get_path;
    iface->get_value       = e_destination_store_get_value;
    iface->iter_next       = e_destination_store_iter_next;
    iface->iter_children   = e_destination_store_iter_children;
    iface->iter_has_child  = e_destination_store_iter_has_child;
    iface->iter_n_children = e_destination_store_iter_n_children;
    iface->iter_nth_child  = e_destination_store_iter_nth_child;
    iface->iter_parent     = e_destination_store_iter_parent;
}

static void
e_destination_store_init (EDestinationStore *destination_store)
{
    destination_store->priv =
        E_DESTINATION_STORE_GET_PRIVATE (destination_store);

    destination_store->priv->destinations = g_ptr_array_new ();
    destination_store->priv->stamp = g_random_int ();
}

/**
 * e_destination_store_new:
 *
 * Creates a new #EDestinationStore.
 *
 * Returns: A new #EDestinationStore.
 **/
EDestinationStore *
e_destination_store_new (void)
{
    return g_object_new (E_TYPE_DESTINATION_STORE, NULL);
}

/* ------------------ *
 * Row update helpers *
 * ------------------ */

static void
row_deleted (EDestinationStore *destination_store,
             gint n)
{
    GtkTreePath *path;

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, n);
    gtk_tree_model_row_deleted (GTK_TREE_MODEL (destination_store), path);
    gtk_tree_path_free (path);
}

static void
row_inserted (EDestinationStore *destination_store,
              gint n)
{
    GtkTreePath *path;
    GtkTreeIter  iter;

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

    if (gtk_tree_model_get_iter (GTK_TREE_MODEL (destination_store), &iter, path))
        gtk_tree_model_row_inserted (GTK_TREE_MODEL (destination_store), path, &iter);

    gtk_tree_path_free (path);
}

static void
row_changed (EDestinationStore *destination_store,
             gint n)
{
    GtkTreePath *path;
    GtkTreeIter  iter;

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

    if (gtk_tree_model_get_iter (GTK_TREE_MODEL (destination_store), &iter, path))
        gtk_tree_model_row_changed (GTK_TREE_MODEL (destination_store), path, &iter);

    gtk_tree_path_free (path);
}

/* ------------------- *
 * Destination helpers *
 * ------------------- */

static gint
find_destination_by_pointer (EDestinationStore *destination_store,
                             EDestination *destination)
{
    GPtrArray *array;
    gint i;

    array = destination_store->priv->destinations;

    for (i = 0; i < array->len; i++) {
        EDestination *destination_here;

        destination_here = g_ptr_array_index (array, i);

        if (destination_here == destination)
            return i;
    }

    return -1;
}

static gint
find_destination_by_email (EDestinationStore *destination_store,
                           EDestination *destination)
{
    GPtrArray *array;
    gint i;
    const gchar *e_mail = e_destination_get_email (destination);

    array = destination_store->priv->destinations;

    for (i = 0; i < array->len; i++) {
        EDestination *destination_here;
        const gchar *mail;

        destination_here = g_ptr_array_index (array, i);
        mail = e_destination_get_email (destination_here);

        if (g_str_equal (e_mail, mail))
            return i;
    }

    return -1;
}

static void
start_destination (EDestinationStore *destination_store,
                   EDestination *destination)
{
    g_signal_connect_swapped (
        destination, "changed",
        G_CALLBACK (destination_changed), destination_store);
}

static void
stop_destination (EDestinationStore *destination_store,
                  EDestination *destination)
{
    g_signal_handlers_disconnect_matched (
        destination, G_SIGNAL_MATCH_DATA,
        0, 0, NULL, NULL, destination_store);
}

/* --------------- *
 * Signal handlers *
 * --------------- */

static void
destination_changed (EDestinationStore *destination_store,
                     EDestination *destination)
{
    gint n;

    n = find_destination_by_pointer (destination_store, destination);
    if (n < 0) {
        g_warning ("EDestinationStore got change from unknown EDestination!");
        return;
    }

    row_changed (destination_store, n);
}

/* --------------------- *
 * EDestinationStore API *
 * --------------------- */

/**
 * e_destination_store_get_destination:
 * @destination_store: an #EDestinationStore
 * @iter: a #GtkTreeIter
 *
 * Gets the #EDestination from @destination_store at @iter.
 *
 * Returns: An #EDestination.
 **/
EDestination *
e_destination_store_get_destination (EDestinationStore *destination_store,
                                     GtkTreeIter *iter)
{
    GPtrArray *array;
    gint index;

    g_return_val_if_fail (E_IS_DESTINATION_STORE (destination_store), NULL);
    g_return_val_if_fail (ITER_IS_VALID (destination_store, iter), NULL);

    array = destination_store->priv->destinations;
    index = ITER_GET (iter);

    return g_ptr_array_index (array, index);
}

/**
 * e_destination_store_list_destinations:
 * @destination_store: an #EDestinationStore
 *
 * Gets a list of all the #EDestinations in @destination_store.
 *
 * Returns: A #GList of pointers to #EDestination. The list is owned
 * by the caller, but the #EDestination elements aren't.
 **/
GList *
e_destination_store_list_destinations (EDestinationStore *destination_store)
{
    GList *destination_list = NULL;
    GPtrArray *array;
    gint   i;

    g_return_val_if_fail (E_IS_DESTINATION_STORE (destination_store), NULL);

    array = destination_store->priv->destinations;

    for (i = 0; i < array->len; i++) {
        EDestination *destination;

        destination = g_ptr_array_index (array, i);
        destination_list = g_list_prepend (destination_list, destination);
    }

    destination_list = g_list_reverse (destination_list);

    return destination_list;
}

/**
 * e_destination_store_insert_destination:
 * @destination_store: an #EDestinationStore
 * @index: the index at which to insert
 * @destination: an #EDestination to insert
 *
 * Inserts @destination into @destination_store at the position
 * indicated by @index. @destination_store will ref @destination.
 **/
void
e_destination_store_insert_destination (EDestinationStore *destination_store,
                                        gint index,
                                        EDestination *destination)
{
    GPtrArray *array;

    g_return_if_fail (E_IS_DESTINATION_STORE (destination_store));
    g_return_if_fail (index >= 0);

    if (find_destination_by_pointer (destination_store, destination) >= 0) {
        g_warning ("Same destination added more than once to EDestinationStore!");
        return;
    }

    g_object_ref (destination);

    array = destination_store->priv->destinations;
    index = MIN (index, array->len);

    g_ptr_array_set_size (array, array->len + 1);

    if (array->len - 1 - index > 0) {
        memmove (
            array->pdata + index + 1,
            array->pdata + index,
            (array->len - 1 - index) * sizeof (gpointer));
    }

    array->pdata[index] = destination;
    start_destination (destination_store, destination);
    row_inserted (destination_store, index);
}

/**
 * e_destination_store_append_destination:
 * @destination_store: an #EDestinationStore
 * @destination: an #EDestination
 *
 * Appends @destination to the list of destinations in @destination_store.
 * @destination_store will ref @destination.
 **/
void
e_destination_store_append_destination (EDestinationStore *destination_store,
                                        EDestination *destination)
{
    GPtrArray *array;

    g_return_if_fail (E_IS_DESTINATION_STORE (destination_store));

    if (find_destination_by_email (destination_store, destination) >= 0 && !e_destination_is_evolution_list (destination)) {
        g_warning ("Same destination added more than once to EDestinationStore!");
        return;
    }

    array = destination_store->priv->destinations;
    g_object_ref (destination);

    g_ptr_array_add (array, destination);
    start_destination (destination_store, destination);
    row_inserted (destination_store, array->len - 1);
}

/**
 * e_destination_store_remove_destination:
 * @destination_store: an #EDestinationStore
 * @destination: an #EDestination to remove
 *
 * Removes @destination from @destination_store. @destination_store will
 * unref @destination.
 **/
void
e_destination_store_remove_destination (EDestinationStore *destination_store,
                                        EDestination *destination)
{
    GPtrArray *array;
    gint n;

    g_return_if_fail (E_IS_DESTINATION_STORE (destination_store));

    n = find_destination_by_pointer (destination_store, destination);
    if (n < 0) {
        g_warning ("Tried to remove unknown destination from EDestinationStore!");
        return;
    }

    stop_destination (destination_store, destination);
    g_object_unref (destination);

    array = destination_store->priv->destinations;
    g_ptr_array_remove_index (array, n);
    row_deleted (destination_store, n);
}

void
e_destination_store_remove_destination_nth (EDestinationStore *destination_store,
                                            gint n)
{
    EDestination *destination;
    GPtrArray *array;

    g_return_if_fail (n >= 0);

    array = destination_store->priv->destinations;
    destination = g_ptr_array_index (array, n);
    stop_destination (destination_store, destination);
    g_object_unref (destination);

    g_ptr_array_remove_index (array, n);
    row_deleted (destination_store, n);
}

guint
e_destination_store_get_destination_count (EDestinationStore *destination_store)
{
    return destination_store->priv->destinations->len;
}

/* ---------------- *
 * GtkTreeModel API *
 * ---------------- */

static GtkTreeModelFlags
e_destination_store_get_flags (GtkTreeModel *tree_model)
{
    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), 0);

    return GTK_TREE_MODEL_LIST_ONLY;
}

static gint
e_destination_store_get_n_columns (GtkTreeModel *tree_model)
{
    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), 0);

    return E_CONTACT_FIELD_LAST;
}

static GType
e_destination_store_get_column_type (GtkTreeModel *tree_model,
                                     gint index)
{
    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), G_TYPE_INVALID);
    g_return_val_if_fail (index >= 0 && index < E_DESTINATION_STORE_NUM_COLUMNS, G_TYPE_INVALID);

    return column_types[index];
}

static gboolean
e_destination_store_get_iter (GtkTreeModel *tree_model,
                              GtkTreeIter *iter,
                              GtkTreePath *path)
{
    EDestinationStore *destination_store;
    GPtrArray *array;
    gint index;

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), FALSE);
    g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);

    destination_store = E_DESTINATION_STORE (tree_model);

    index = gtk_tree_path_get_indices (path)[0];
    array = destination_store->priv->destinations;

    if (index >= array->len)
        return FALSE;

    ITER_SET (destination_store, iter, index);
    return TRUE;
}

GtkTreePath *
e_destination_store_get_path (GtkTreeModel *tree_model,
                              GtkTreeIter *iter)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);
    GtkTreePath       *path;
    gint               index;

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), NULL);
    g_return_val_if_fail (ITER_IS_VALID (destination_store, iter), NULL);

    index = ITER_GET (iter);
    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, index);

    return path;
}

static gboolean
e_destination_store_iter_next (GtkTreeModel *tree_model,
                               GtkTreeIter *iter)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);
    gint           index;

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), FALSE);
    g_return_val_if_fail (ITER_IS_VALID (destination_store, iter), FALSE);

    index = ITER_GET (iter);

    if (index + 1 < destination_store->priv->destinations->len) {
        ITER_SET (destination_store, iter, index + 1);
        return TRUE;
    }

    return FALSE;
}

static gboolean
e_destination_store_iter_children (GtkTreeModel *tree_model,
                                   GtkTreeIter *iter,
                                   GtkTreeIter *parent)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), FALSE);

    /* This is a list, nodes have no children. */
    if (parent)
        return FALSE;

    /* But if parent == NULL we return the list itself as children of the root. */
    if (destination_store->priv->destinations->len <= 0)
        return FALSE;

    ITER_SET (destination_store, iter, 0);
    return TRUE;
}

static gboolean
e_destination_store_iter_has_child (GtkTreeModel *tree_model,
                                    GtkTreeIter *iter)
{
    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), FALSE);

    if (iter == NULL)
        return TRUE;

    return FALSE;
}

static gint
e_destination_store_iter_n_children (GtkTreeModel *tree_model,
                                     GtkTreeIter *iter)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), -1);

    if (iter == NULL)
        return destination_store->priv->destinations->len;

    g_return_val_if_fail (ITER_IS_VALID (destination_store, iter), -1);
    return 0;
}

static gboolean
e_destination_store_iter_nth_child (GtkTreeModel *tree_model,
                                    GtkTreeIter *iter,
                                    GtkTreeIter *parent,
                                    gint n)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);

    g_return_val_if_fail (E_IS_DESTINATION_STORE (tree_model), FALSE);

    if (parent)
        return FALSE;

    if (n < destination_store->priv->destinations->len) {
        ITER_SET (destination_store, iter, n);
        return TRUE;
    }

    return FALSE;
}

static gboolean
e_destination_store_iter_parent (GtkTreeModel *tree_model,
                                 GtkTreeIter *iter,
                                 GtkTreeIter *child)
{
    return FALSE;
}

static void
e_destination_store_get_value (GtkTreeModel *tree_model,
                               GtkTreeIter *iter,
                               gint column,
                               GValue *value)
{
    EDestinationStore *destination_store = E_DESTINATION_STORE (tree_model);
    EDestination *destination;
    GString *string_new;
    EContact *contact;
    GPtrArray *array;
    const gchar *string;
    gint row;

    g_return_if_fail (E_IS_DESTINATION_STORE (tree_model));
    g_return_if_fail (column < E_DESTINATION_STORE_NUM_COLUMNS);
    g_return_if_fail (ITER_IS_VALID (destination_store, iter));

    g_value_init (value, column_types[column]);

    array = destination_store->priv->destinations;

    row = ITER_GET (iter);
    if (row >= array->len)
        return;

    destination = g_ptr_array_index (array, row);
    g_assert (destination);

    switch (column) {
        case E_DESTINATION_STORE_COLUMN_NAME:
            string = e_destination_get_name (destination);
            g_value_set_string (value, string);
            break;

        case E_DESTINATION_STORE_COLUMN_EMAIL:
            string = e_destination_get_email (destination);
            g_value_set_string (value, string);
            break;

        case E_DESTINATION_STORE_COLUMN_ADDRESS:
            contact = e_destination_get_contact (destination);
            if (contact && E_IS_CONTACT (contact)) {
                if (e_contact_get (contact, E_CONTACT_IS_LIST)) {
                    string = e_destination_get_name (destination);
                    string_new = g_string_new (string);
                    string_new = g_string_append (string_new, " mailing list");
                    g_value_set_string (value, string_new->str);
                    g_string_free (string_new, TRUE);
                }
                else {
                    string = e_destination_get_address (destination);
                    g_value_set_string (value, string);
                }
            }
            else {
                string = e_destination_get_address (destination);
                g_value_set_string (value, string);

            }
            break;

        default:
            g_assert_not_reached ();
            break;
    }
}

/**
 * e_destination_store_get_stamp:
 * @destination_store: an #EDestinationStore
 *
 * Since: 2.32
 **/
gint
e_destination_store_get_stamp (EDestinationStore *destination_store)
{
    g_return_val_if_fail (E_IS_DESTINATION_STORE (destination_store), 0);

    return destination_store->priv->stamp;
}