/* Copyright (c) 2007-2011 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "ioloop.h"
#include "istream.h"
#include "str.h"
#include "index-mail.h"
#include "dbox-mail.h"
#include "sdbox-storage.h"
#include "sdbox-file.h"

#include <stdlib.h>
#include <sys/stat.h>

static void sdbox_mail_set_expunged(struct dbox_mail *mail)
{
	struct mail *_mail = &mail->imail.mail.mail;

	/* syncing code first unlinks the file, and index is updated later.
	   so at this point we don't know if the file was unexpectedly lost
	   or if it's just being expunged. just assume the latter. */
	mail_set_expunged(_mail);
}

static bool sdbox_mail_file_set(struct dbox_mail *mail)
{
	struct mail *_mail = &mail->imail.mail.mail;
	struct sdbox_mailbox *mbox = (struct sdbox_mailbox *)_mail->box;
	bool deleted;
	int ret;

	if (mail->open_file != NULL) {
		/* already set */
		return FALSE;
	} else if (!_mail->saving) {
		mail->open_file = sdbox_file_init(mbox, _mail->uid);
		return FALSE;
	} else {
		/* mail is being saved in this transaction */
		mail->open_file =
			sdbox_save_file_get_file(_mail->transaction,
						 _mail->seq);
		mail->open_file->refcount++;

		/* it doesn't have input stream yet */
		ret = dbox_file_open(mail->open_file, &deleted);
		i_assert(ret > 0);
		return TRUE;
	}
}

int sdbox_mail_open(struct dbox_mail *mail, uoff_t *offset_r,
		    struct dbox_file **file_r)
{
	struct mail *_mail = &mail->imail.mail.mail;
	bool deleted;

	if (_mail->lookup_abort != MAIL_LOOKUP_ABORT_NEVER) {
		mail_set_aborted(_mail);
		return -1;
	}

	if (!sdbox_mail_file_set(mail)) {
		if (!dbox_file_is_open(mail->open_file))
			mail->imail.mail.stats_open_lookup_count++;
		if (dbox_file_open(mail->open_file, &deleted) <= 0)
			return -1;
		if (deleted) {
			sdbox_mail_set_expunged(mail);
			return -1;
		}
	}

	*file_r = mail->open_file;
	*offset_r = 0;
	return 0;
}

struct mail_vfuncs sdbox_mail_vfuncs = {
	dbox_mail_close,
	index_mail_free,
	index_mail_set_seq,
	index_mail_set_uid,
	index_mail_set_uid_cache_updates,
	index_mail_prefetch,

	index_mail_get_flags,
	index_mail_get_keywords,
	index_mail_get_keyword_indexes,
	index_mail_get_modseq,
	index_mail_get_parts,
	index_mail_get_date,
	dbox_mail_get_received_date,
	dbox_mail_get_save_date,
	dbox_mail_get_virtual_size,
	dbox_mail_get_physical_size,
	index_mail_get_first_header,
	index_mail_get_headers,
	index_mail_get_header_stream,
	dbox_mail_get_stream,
	dbox_mail_get_special,
	index_mail_get_real_mail,
	index_mail_update_flags,
	index_mail_update_keywords,
	index_mail_update_modseq,
	NULL,
	index_mail_expunge,
	index_mail_set_cache_corrupted,
	index_mail_opened
};