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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.
 *
 * 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/>.
 *
 */

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

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

#include <camel/camel.h>

#include <e-util/e-util.h>

#include "e-mail-formatter-quote.h"
#include "e-mail-part-list.h"
#include "e-mail-part-utils.h"

typedef EMailFormatterExtension EMailFormatterQuoteMessageRFC822;
typedef EMailFormatterExtensionClass EMailFormatterQuoteMessageRFC822Class;

GType e_mail_formatter_quote_message_rfc822_get_type (void);

G_DEFINE_TYPE (
    EMailFormatterQuoteMessageRFC822,
    e_mail_formatter_quote_message_rfc822,
    E_TYPE_MAIL_FORMATTER_QUOTE_EXTENSION)

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

static gboolean
emfqe_message_rfc822_format (EMailFormatterExtension *extension,
                             EMailFormatter *formatter,
                             EMailFormatterContext *context,
                             EMailPart *part,
                             GOutputStream *stream,
                             GCancellable *cancellable)
{
    GQueue queue = G_QUEUE_INIT;
    GList *head, *link;
    gchar *header, *end;
    EMailFormatterQuoteContext *qc = (EMailFormatterQuoteContext *) context;
    const gchar *part_id;
    const gchar *string;

    part_id = e_mail_part_get_id (part);

    if (g_cancellable_is_cancelled (cancellable))
        return FALSE;

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

    e_mail_part_list_queue_parts (context->part_list, part_id, &queue);

    if (g_queue_is_empty (&queue))
        return FALSE;

    /* Discard the first EMailPart. */
    g_object_unref (g_queue_pop_head (&queue));

    head = g_queue_peek_head (&queue);

    end = g_strconcat (part_id, ".end", NULL);

    for (link = head; link != NULL; link = g_list_next (link)) {
        EMailPart *p = link->data;
        const gchar *p_id;

        p_id = e_mail_part_get_id (p);

        /* Skip attachment bar */
        if (e_mail_part_id_has_suffix (p, ".attachment-bar"))
            continue;

        if (e_mail_part_id_has_suffix (p, ".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 (e_mail_part_id_has_suffix (p, ".rfc822")) {
            gchar *sub_end = g_strconcat (p_id, ".end", NULL);

            while (link != NULL) {
                p = link->data;

                if (g_strcmp0 (p_id, sub_end) == 0)
                    break;

                link = g_list_next (link);
            }
            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);

    while (!g_queue_is_empty (&queue))
        g_object_unref (g_queue_pop_head (&queue));

    string = "</body></html>";
    g_output_stream_write_all (
        stream, string, strlen (string), NULL, cancellable, NULL);

    return TRUE;
}

static void
e_mail_formatter_quote_message_rfc822_class_init (EMailFormatterExtensionClass *class)
{
    class->mime_types = formatter_mime_types;
    class->priority = G_PRIORITY_HIGH;
    class->format = emfqe_message_rfc822_format;
}

static void
e_mail_formatter_quote_message_rfc822_init (EMailFormatterExtension *extension)
{
}