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/*
 *
 * 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-composer-post-header.h"

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

#include "mail/em-folder-selector.h"
#include "mail/em-folder-tree.h"

#define E_COMPOSER_POST_HEADER_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_COMPOSER_POST_HEADER, EComposerPostHeaderPrivate))

enum {
    PROP_0,
    PROP_ACCOUNT
};

struct _EComposerPostHeaderPrivate {
    EAccount *account;
    gchar *base_url;  /* derived from account */
    gboolean custom;
};

static gpointer parent_class;

/* Forward Declarations (to avoid pulling in Bonobo stuff) */
struct _MailComponent *mail_component_peek (void);
struct _EMFolderTreeModel *mail_component_peek_tree_model (struct _MailComponent *component);

static gchar *
composer_post_header_folder_name_to_string (EComposerPostHeader *header,
                                            const gchar *url)
{
    const gchar *base_url = header->priv->base_url;

    if (base_url != NULL) {
        gsize length = strlen (base_url);

        if (g_ascii_strncasecmp (url, base_url, length) == 0)
            return g_strdup (url + length);
    }

    return g_strdup (url);
}

static void
composer_post_header_set_base_url (EComposerPostHeader *header)
{
    EAccount *account = header->priv->account;
    CamelURL *camel_url;
    gchar *url;

    if (account == NULL || account->source == NULL)
        return;

    url = account->source->url;
    if (url == NULL || *url == '\0')
        return;

    camel_url = camel_url_new (url, NULL);
    if (camel_url == NULL)
        return;

    url = camel_url_to_string (camel_url, CAMEL_URL_HIDE_ALL);
    camel_url_free (camel_url);

    header->priv->base_url = url;
}

static GList *
composer_post_header_split_csv (const gchar *csv)
{
    GList *list = NULL;
    gchar **strv;
    guint length, ii;

    strv = g_strsplit (csv, ",", 0);
    length = g_strv_length (strv);

    for (ii = 0; ii < length; ii++)
        if (*g_strstrip (strv[ii]) != '\0')
            list = g_list_prepend (list, g_strdup (strv[ii]));

    g_strfreev (strv);

    return g_list_reverse (list);
}

static void
composer_post_header_changed_cb (EComposerPostHeader *header)
{
    header->priv->custom = TRUE;
}

static void
composer_post_header_clicked_cb (EComposerPostHeader *header)
{
    EMFolderTreeModel *model;
    GtkWidget *folder_tree;
    GtkWidget *dialog;
    GList *list;

    model = mail_component_peek_tree_model (mail_component_peek ());
    folder_tree = em_folder_tree_new_with_model (model);

    em_folder_tree_set_multiselect (
        EM_FOLDER_TREE (folder_tree), TRUE);
    em_folder_tree_set_excluded (
        EM_FOLDER_TREE (folder_tree),
        EMFT_EXCLUDE_NOSELECT |
        EMFT_EXCLUDE_VIRTUAL |
        EMFT_EXCLUDE_VTRASH);

    dialog = em_folder_selector_new (
        EM_FOLDER_TREE (folder_tree),
        EM_FOLDER_SELECTOR_CAN_CREATE,
        _("Posting destination"),
        _("Choose folders to post the message to."),
        NULL);

    list = e_composer_post_header_get_folders (header);
    em_folder_selector_set_selected_list (
        EM_FOLDER_SELECTOR (dialog), list);
    g_list_foreach (list, (GFunc) g_free, NULL);
    g_list_free (list);

    if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK) {
        list = em_folder_selector_get_selected_uris (
            EM_FOLDER_SELECTOR (dialog));
        e_composer_post_header_set_folders (header, list);
        header->priv->custom = FALSE;
        g_list_foreach (list, (GFunc) g_free, NULL);
        g_list_free (list);
    }

    gtk_widget_destroy (dialog);
}

static GObject *
composer_post_header_constructor (GType type,
                                  guint n_construct_properties,
                                  GObjectConstructParam *construct_properties)
{
    GObject *object;

    /* Chain up to parent's constructor() method. */
    object = G_OBJECT_CLASS (parent_class)->constructor (
        type, n_construct_properties, construct_properties);

    e_composer_header_set_title_tooltip (
        E_COMPOSER_HEADER (object),
        _("Click here to select folders to post to"));

    g_signal_connect (
        object, "changed",
        G_CALLBACK (composer_post_header_changed_cb), NULL);

    g_signal_connect (
        object, "clicked",
        G_CALLBACK (composer_post_header_clicked_cb), NULL);

    return object;
}

static void
composer_post_header_set_property (GObject *object,
                                   guint property_id,
                                   const GValue *value,
                                   GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT:
            e_composer_post_header_set_account (
                E_COMPOSER_POST_HEADER (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
composer_post_header_get_property (GObject *object,
                                   guint property_id,
                                   GValue *value,
                                   GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_ACCOUNT:
            g_value_set_object (
                value, e_composer_post_header_get_account (
                E_COMPOSER_POST_HEADER (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
composer_post_header_dispose (GObject *object)
{
    EComposerPostHeaderPrivate *priv;

    priv = E_COMPOSER_POST_HEADER_GET_PRIVATE (object);

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

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

static void
composer_post_header_finalize (GObject *object)
{
    EComposerPostHeaderPrivate *priv;

    priv = E_COMPOSER_POST_HEADER_GET_PRIVATE (object);

    g_free (priv->base_url);

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

static void
composer_post_header_class_init (EComposerPostHeaderClass *class)
{
    GObjectClass *object_class;

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

    object_class = G_OBJECT_CLASS (class);
    object_class->constructor = composer_post_header_constructor;
    object_class->set_property = composer_post_header_set_property;
    object_class->get_property = composer_post_header_get_property;
    object_class->dispose = composer_post_header_dispose;
    object_class->finalize = composer_post_header_finalize;

    g_object_class_install_property (
        object_class,
        PROP_ACCOUNT,
        g_param_spec_object (
            "account",
            NULL,
            NULL,
            E_TYPE_ACCOUNT,
            G_PARAM_READWRITE));
}

static void
composer_post_header_init (EComposerPostHeader *header)
{
    header->priv = E_COMPOSER_POST_HEADER_GET_PRIVATE (header);
}

GType
e_composer_post_header_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EComposerPostHeaderClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) composer_post_header_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EComposerPostHeader),
            0,     /* n_preallocs */
            (GInstanceInitFunc) composer_post_header_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            E_TYPE_COMPOSER_TEXT_HEADER,
            "EComposerPostHeader", &type_info, 0);
    }

    return type;
}

EComposerHeader *
e_composer_post_header_new (const gchar *label)
{
    return g_object_new (
        E_TYPE_COMPOSER_POST_HEADER,
        "label", label, "button", TRUE, NULL);
}

EAccount *
e_composer_post_header_get_account (EComposerPostHeader *header)
{
    g_return_val_if_fail (E_IS_COMPOSER_POST_HEADER (header), NULL);

    return header->priv->account;
}

void
e_composer_post_header_set_account (EComposerPostHeader *header,
                                    EAccount *account)
{
    GList *folders = NULL;

    g_return_if_fail (E_IS_COMPOSER_POST_HEADER (header));

    if (account != NULL) {
        g_return_if_fail (E_IS_ACCOUNT (account));
        g_object_ref (account);
    }

    if (!header->priv->custom)
        folders = e_composer_post_header_get_folders (header);

    if (header->priv->account != NULL)
        g_object_unref (header->priv->account);

    header->priv->account = account;
    composer_post_header_set_base_url (header);

    /* Make folders relative to the new account. */
    if (!header->priv->custom) {
        e_composer_post_header_set_folders (header, folders);
        g_list_foreach (folders, (GFunc) g_free, NULL);
        g_list_free (folders);
    }

    g_object_notify (G_OBJECT (header), "account");
}

GList *
e_composer_post_header_get_folders (EComposerPostHeader *header)
{
    GList *folders, *iter;
    gchar *base_url;

    g_return_val_if_fail (E_IS_COMPOSER_POST_HEADER (header), NULL);

    folders = composer_post_header_split_csv (
        e_composer_text_header_get_text (
        E_COMPOSER_TEXT_HEADER (header)));

    base_url = header->priv->base_url;
    if (base_url == NULL)
        return folders;

    for (iter = folders; iter != NULL; iter = iter->next) {
        /* Convert relative folder names to absolute. */
        /* XXX Should use CamelURL for this. */
        if (strstr (iter->data, ":/") == NULL) {
            gchar *abs_url;

            abs_url = g_strconcat (base_url, iter->data, NULL);
            g_free (iter->data);
            iter->data = abs_url;
        }
    }

    return folders;
}

void
e_composer_post_header_set_folders (EComposerPostHeader *header,
                                    GList *folders)
{
    GList *iter;
    gint ii = 0;
    gchar **strv;
    gchar *text;
    gboolean custom_save;

    g_return_if_fail (E_IS_COMPOSER_POST_HEADER (header));

    strv = g_new0 (gchar *, g_list_length (folders) + 1);

    for (iter = folders; iter != NULL; iter = iter->next)
        strv[ii++] = composer_post_header_folder_name_to_string (
            header, iter->data);

    text = g_strjoinv (", ", strv);
    custom_save = header->priv->custom;
    e_composer_text_header_set_text (
        E_COMPOSER_TEXT_HEADER (header), text);
    header->priv->custom = custom_save;
    g_free (text);

    g_strfreev (strv);
}

void
e_composer_post_header_set_folders_base (EComposerPostHeader *header,
                                         const gchar *base_url,
                                         const gchar *folders)
{
    GList *list, *iter;

    list = composer_post_header_split_csv (folders);
    for (iter = list; iter != NULL; iter = iter->next) {
        gchar *abs_url;

        /* FIXME This doesn't handle all folder names properly. */
        abs_url = g_strdup_printf (
            "%s/%s", base_url, (gchar *) iter->data);
        g_free (iter->data);
        iter->data = abs_url;
    }

    e_composer_post_header_set_folders (header, list);
    g_list_foreach (list, (GFunc) g_free, NULL);
    g_list_free (list);
}