/*
 * e-mail-parser-multipart-related.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 <em-format/e-mail-parser-extension.h>
#include <em-format/e-mail-parser.h>
#include <em-format/e-mail-part-utils.h>
#include <e-util/e-util.h>

#include <camel/camel.h>

#include <string.h>

typedef struct _EMailParserMultipartRelated {
	GObject parent;
} EMailParserMultipartRelated;

typedef struct _EMailParserMultipartRelatedClass {
	GObjectClass parent_class;
} EMailParserMultipartRelatedClass;

static void e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface);

G_DEFINE_TYPE_EXTENDED (
	EMailParserMultipartRelated,
	e_mail_parser_multipart_related,
	G_TYPE_OBJECT,
	0,
	G_IMPLEMENT_INTERFACE (
		E_TYPE_MAIL_PARSER_EXTENSION,
		e_mail_parser_parser_extension_interface_init));

static const gchar *parser_mime_types[] = {
	"multipart/related",
	NULL
};

static gboolean
empe_mp_related_parse (EMailParserExtension *extension,
                       EMailParser *parser,
                       CamelMimePart *part,
                       GString *part_id,
                       GCancellable *cancellable,
                       GQueue *out_mail_parts)
{
	CamelMultipart *mp;
	CamelMimePart *body_part, *display_part = NULL;
	gint i, nparts, partidlen, displayid = 0;

	mp = (CamelMultipart *) camel_medium_get_content ((CamelMedium *) part);

	if (!CAMEL_IS_MULTIPART (mp))
		return e_mail_parser_parse_part_as (
			parser, part, part_id,
			"application/vnd.evolution.source",
			cancellable, out_mail_parts);

	display_part = e_mail_part_get_related_display_part (part, &displayid);

	if (display_part == NULL)
		return e_mail_parser_parse_part_as (
			parser, part, part_id, "multipart/mixed",
			cancellable, out_mail_parts);

	/* The to-be-displayed part goes first */
	partidlen = part_id->len;
	g_string_append_printf (part_id, ".related.%d", displayid);

	e_mail_parser_parse_part (
		parser, display_part, part_id, cancellable, out_mail_parts);

	g_string_truncate (part_id, partidlen);

	/* Process the related parts */
	nparts = camel_multipart_get_number (mp);
	for (i = 0; i < nparts; i++) {
		GQueue work_queue = G_QUEUE_INIT;
		GList *head, *link;

		body_part = camel_multipart_get_part (mp, i);

		if (body_part == display_part)
			continue;

		g_string_append_printf (part_id, ".related.%d", i);

		e_mail_parser_parse_part (
			parser, body_part, part_id,
			cancellable, &work_queue);

		g_string_truncate (part_id, partidlen);

		head = g_queue_peek_head_link (&work_queue);

		for (link = head; link != NULL; link = g_list_next (link)) {
			EMailPart *mail_part = link->data;

			/* Don't render the part on it's own! */
			if (mail_part->cid != NULL)
				mail_part->is_hidden = TRUE;
		}

		e_queue_transfer (&work_queue, out_mail_parts);
	}

	return TRUE;
}

static void
e_mail_parser_multipart_related_class_init (EMailParserMultipartRelatedClass *class)
{
}

static void
e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
{
	iface->mime_types = parser_mime_types;
	iface->parse = empe_mp_related_parse;
}

static void
e_mail_parser_multipart_related_init (EMailParserMultipartRelated *parser)
{

}