/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Places code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2008
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * the provisions above, a recipient may use your version of this file under
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 * ***** END LICENSE BLOCK ***** */

#include "nsPlacesTables.h"

#ifndef __nsPlacesTriggers_h__
#define __nsPlacesTriggers_h__

/**
 * Exclude these visit types:
 *  0 - invalid
 *  4 - EMBED
 *  7 - DOWNLOAD
 *  7 - FRAMED_LINK
 **/
#define EXCLUDED_VISIT_TYPES "0, 4, 7, 8"
/**
 * Trigger checks to ensure that at least one bookmark is still using a keyword
 * when any bookmark is deleted.  If there are no more bookmarks using it, the
 * keyword is deleted.
 */
#define CREATE_KEYWORD_VALIDITY_TRIGGER NS_LITERAL_CSTRING( \
  "CREATE TRIGGER moz_bookmarks_beforedelete_v1_trigger " \
  "BEFORE DELETE ON moz_bookmarks FOR EACH ROW " \
  "WHEN OLD.keyword_id NOT NULL " \
  "BEGIN " \
    "DELETE FROM moz_keywords " \
    "WHERE id = OLD.keyword_id " \
    "AND NOT EXISTS ( " \
      "SELECT id " \
      "FROM moz_bookmarks " \
      "WHERE keyword_id = OLD.keyword_id " \
      "AND id <> OLD.id " \
      "LIMIT 1 " \
    ");" \
  "END" \
)

/**
 * This triggers update visit_count and last_visit_date based on historyvisits
 * table changes.
 */
#define CREATE_HISTORYVISITS_AFTERINSERT_TRIGGER NS_LITERAL_CSTRING( \
  "CREATE TEMP TRIGGER moz_historyvisits_afterinsert_v2_trigger " \
  "AFTER INSERT ON moz_historyvisits FOR EACH ROW " \
  "BEGIN " \
    "UPDATE moz_places SET " \
      "visit_count = visit_count + (SELECT NEW.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
      "last_visit_date = MAX(IFNULL(last_visit_date, 0), NEW.visit_date) " \
    "WHERE id = NEW.place_id;" \
  "END" \
)

#define CREATE_HISTORYVISITS_AFTERDELETE_TRIGGER NS_LITERAL_CSTRING( \
  "CREATE TEMP TRIGGER moz_historyvisits_afterdelete_v2_trigger " \
  "AFTER DELETE ON moz_historyvisits FOR EACH ROW " \
  "BEGIN " \
    "UPDATE moz_places SET " \
      "visit_count = visit_count - (SELECT OLD.visit_type NOT IN (" EXCLUDED_VISIT_TYPES ")), "\
      "last_visit_date = (SELECT visit_date FROM moz_historyvisits " \
                         "WHERE place_id = OLD.place_id " \
                         "ORDER BY visit_date DESC LIMIT 1) " \
    "WHERE id = OLD.place_id;" \
  "END" \
)

/**
 * This trigger removes a row from moz_openpages_temp when open_count reaches 0.
 *
 * @note this should be kept up-to-date with the definition in
 *       nsPlacesAutoComplete.js
 */
#define CREATE_REMOVEOPENPAGE_CLEANUP_TRIGGER NS_LITERAL_CSTRING( \
  "CREATE TEMPORARY TRIGGER moz_openpages_temp_afterupdate_trigger " \
  "AFTER UPDATE OF open_count ON moz_openpages_temp FOR EACH ROW " \
  "WHEN NEW.open_count = 0 " \
  "BEGIN " \
    "DELETE FROM moz_openpages_temp " \
    "WHERE url = NEW.url;" \
  "END" \
)

#endif // __nsPlacesTriggers_h__