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/*
 * e-mail-formatter-quote-message-rfc822.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/>
 *
 */

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

#include "e-mail-format-extensions.h"

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

#include <em-format/e-mail-formatter-extension.h>
#include <em-format/e-mail-formatter-quote.h>
#include <em-format/e-mail-part-list.h>
#include <em-format/e-mail-part-utils.h>
#include <e-util/e-util.h>

#include <camel/camel.h>

#include <string.h>

static const gchar* formatter_mime_types[] = { "message/rfc822",
                           "application/vnd.evolution.rfc822.end",
                           NULL };

typedef struct _EMailFormatterQuoteMessageRFC822 {
    GObject parent;
} EMailFormatterQuoteMessageRFC822;

typedef struct _EMailFormatterQuoteMessageRFC822Class {
    GObjectClass parent_class;
} EMailFormatterQuoteMessageRFC822Class;

static void e_mail_formatter_quote_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface);
static void e_mail_formatter_quote_mail_extension_interface_init (EMailExtensionInterface *iface);

G_DEFINE_TYPE_EXTENDED (
    EMailFormatterQuoteMessageRFC822,
    e_mail_formatter_quote_message_rfc822,
    G_TYPE_OBJECT,
    0,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_EXTENSION,
        e_mail_formatter_quote_mail_extension_interface_init)
    G_IMPLEMENT_INTERFACE (
        E_TYPE_MAIL_FORMATTER_EXTENSION,
        e_mail_formatter_quote_formatter_extension_interface_init));

static gboolean
emfqe_message_rfc822_format (EMailFormatterExtension *extension,
                             EMailFormatter *formatter,
                             EMailFormatterContext *context,
                             EMailPart *part,
                             CamelStream *stream,
                             GCancellable *cancellable)
{
    GSList *iter;
    gchar *header, *end;
    EMailFormatterQuoteContext *qc = (EMailFormatterQuoteContext *) context;

    if (g_cancellable_is_cancelled (cancellable))
        return FALSE;

    header = e_mail_formatter_get_html_header (formatter);
    camel_stream_write_string (stream, header, cancellable, NULL);
    g_free (header);

    iter = e_mail_part_list_get_iter (context->parts, part->id);

    end = g_strconcat (part->id, ".end", NULL);
    for (iter = iter->next; iter; iter = iter->next) {
        EMailPart * p = iter->data;
        if (!p)
            continue;

        /* Skip attachment bar */
        if (g_str_has_suffix (p->id, ".attachment-bar"))
            continue;

        if (g_str_has_suffix (p->id, ".headers.")) {
            if (qc->qf_flags & E_MAIL_FORMATTER_QUOTE_FLAG_HEADERS) {
                e_mail_formatter_format_as (
                    formatter, context, part, stream,
                    "application/vnd.evolution.headers",
                    cancellable);
            }

            continue;
        }

        /* Check for nested rfc822 messages */
        if (g_str_has_suffix (p->id, ".rfc822")) {
            gchar *sub_end = g_strconcat (p->id, ".end", NULL);

            while (iter) {
                p = iter->data;
                if (!p) {
                    iter = iter->next;
                    continue;
                }

                if (g_strcmp0 (p->id, sub_end) == 0) {
                    break;
                }

                iter = iter->next;
            }
            g_free (sub_end);
            continue;
        }
        if ((g_strcmp0 (p->id, end) == 0))
            break;

        if (p->is_hidden)
            continue;

        e_mail_formatter_format_as (
            formatter, context, p,
            stream, NULL, cancellable);

    }

    g_free (end);

    camel_stream_write_string (stream, "</body></html>", cancellable, NULL);

    return TRUE;
}

static const gchar *
emfqe_message_rfc822_get_display_name (EMailFormatterExtension *extension)
{
    return NULL;
}

static const gchar *
emfqe_message_rfc822_get_description (EMailFormatterExtension *extension)
{
    return NULL;
}

static const gchar **
emfqe_message_rfc822_mime_types (EMailExtension *extension)
{
    return formatter_mime_types;
}

static void
e_mail_formatter_quote_message_rfc822_class_init (EMailFormatterQuoteMessageRFC822Class *klass)
{
    e_mail_formatter_quote_message_rfc822_parent_class = g_type_class_peek_parent (klass);
}

static void
e_mail_formatter_quote_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface)
{
    iface->format = emfqe_message_rfc822_format;
    iface->get_display_name = emfqe_message_rfc822_get_display_name;
    iface->get_description = emfqe_message_rfc822_get_description;
}

static void
e_mail_formatter_quote_mail_extension_interface_init (EMailExtensionInterface *iface)
{
    iface->mime_types = emfqe_message_rfc822_mime_types;
}

static void
e_mail_formatter_quote_message_rfc822_init (EMailFormatterQuoteMessageRFC822 *formatter)
{

}