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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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include "e-composer-post-header.h"

#include <string.h>
#include <glib/gi18n.h>
#include <camel/camel.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_MAIL_ACCOUNT
};

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

G_DEFINE_TYPE (
    EComposerPostHeader,
    e_composer_post_header,
    E_TYPE_COMPOSER_TEXT_HEADER)

static gchar *
composer_post_header_folder_name_to_string (EComposerPostHeader *header,
                                            const gchar *url)
{
    gchar *res = NULL;
    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) {
            res = g_uri_unescape_string (url + length, NULL);
            if (!res)
                res = g_strdup (url + length);
        }
    }

    if (!res) {
        res = g_uri_unescape_string (url, NULL);
        if (!res)
            res = g_strdup (url);
    }

    return res;
}

static void
composer_post_header_set_base_url (EComposerPostHeader *header)
{
    ESource *source;
    const gchar *uid;

    source = header->priv->mail_account;
    if (source == NULL)
        return;

    uid = e_source_get_uid (source);
    g_free (header->priv->base_url);
    header->priv->base_url = g_strdup_printf ("folder://%s", uid);
}

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_set_property (GObject *object,
                                   guint property_id,
                                   const GValue *value,
                                   GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_MAIL_ACCOUNT:
            e_composer_post_header_set_mail_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_MAIL_ACCOUNT:
            g_value_set_object (
                value,
                e_composer_post_header_get_mail_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->mail_account != NULL) {
        g_object_unref (priv->mail_account);
        priv->mail_account = NULL;
    }

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

static void
composer_post_header_constructed (GObject *object)
{
    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_composer_post_header_parent_class)->
        constructed (object);

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

static void
composer_post_header_changed (EComposerHeader *header)
{
    EComposerPostHeaderPrivate *priv;

    priv = E_COMPOSER_POST_HEADER_GET_PRIVATE (header);

    priv->custom = TRUE;
}

static void
composer_post_header_clicked (EComposerHeader *header)
{
    EComposerPostHeaderPrivate *priv;

    priv = E_COMPOSER_POST_HEADER_GET_PRIVATE (header);

    priv->custom = FALSE;
}

static void
e_composer_post_header_class_init (EComposerPostHeaderClass *class)
{
    GObjectClass *object_class;
    EComposerHeaderClass *header_class;

    g_type_class_add_private (class, sizeof (EComposerPostHeaderPrivate));

    object_class = G_OBJECT_CLASS (class);
    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;
    object_class->constructed = composer_post_header_constructed;

    header_class = E_COMPOSER_HEADER_CLASS (class);
    header_class->changed = composer_post_header_changed;
    header_class->clicked = composer_post_header_clicked;

    g_object_class_install_property (
        object_class,
        PROP_MAIL_ACCOUNT,
        g_param_spec_object (
            "mail-account",
            NULL,
            NULL,
            E_TYPE_SOURCE,
            G_PARAM_READWRITE));
}

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

EComposerHeader *
e_composer_post_header_new (ESourceRegistry *registry,
                            const gchar *label)
{
    g_return_val_if_fail (E_IS_SOURCE_REGISTRY (registry), NULL);

    return g_object_new (
        E_TYPE_COMPOSER_POST_HEADER,
        "label", label, "button", TRUE,
        "registry", registry, NULL);
}

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);
}

ESource *
e_composer_post_header_get_mail_account (EComposerPostHeader *header)
{
    g_return_val_if_fail (E_IS_COMPOSER_POST_HEADER (header), NULL);

    return header->priv->mail_account;
}

void
e_composer_post_header_set_mail_account (EComposerPostHeader *header,
                                         ESource *mail_account)
{
    GList *folders = NULL;

    g_return_if_fail (E_IS_COMPOSER_POST_HEADER (header));

    if (header->priv->mail_account == mail_account)
        return;

    if (mail_account != NULL) {
        g_return_if_fail (E_IS_SOURCE (mail_account));
        g_object_ref (mail_account);
    }

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

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

    header->priv->mail_account = mail_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), "mail-account");
}