<?php

// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery                                  |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2009 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU 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 General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

// ***********************************************************************
// ** maintain.inc.php : Installation page for Piwigo plugin Event Cats **
// ***********************************************************************

if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

global $ec_conf;

if (!defined('EVNTCATS_PATH'))
 define('EVNTCATS_PATH',PHPWG_PLUGINS_PATH.basename(dirname(__FILE__)). '/');

include_once(EVNTCATS_PATH.'include/ec_conf.inc.php');

function plugin_uninstall() {
  global $prefixeTable, $ec_conf;

  unset($ec_conf);
	pwg_query("DELETE FROM `".CONFIG_TABLE."` WHERE `param` = 'event_cats' LIMIT 1;");
	return pwg_query('DROP TABLE IF EXISTS `'.$prefixeTable.'event_cats`;');
}

function plugin_install() {
  global $prefixeTable;
  
  plugin_uninstall();
  // create table for plugin, if it doesn't exist yet
  $q = pwg_query("
    CREATE TABLE `".$prefixeTable."event_cats` (
      `id`      SMALLINT(5)             UNSIGNED NOT NULL     AUTO_INCREMENT ,
      `code`    VARCHAR(32)                               DEFAULT NULL ,
      `user_id` SMALLINT(5)             UNSIGNED          DEFAULT NULL ,
      `action`  ENUM('ec_ok', 'ec_nok')                   DEFAULT NULL ,
      `arg1`    SMALLINT(5)             UNSIGNED          DEFAULT NULL ,
      `arg2`    SMALLINT(5)             UNSIGNED          DEFAULT NULL ,
      `forced`  ENUM('true', 'false')            NOT NULL DEFAULT 'false' ,
      PRIMARY KEY (`id`),
      KEY `code` (`code`),
      KEY `user_id` (`user_id`)
    )
    DEFAULT CHARACTER SET utf8;
  ");

/*
Explanations on table structure :

code    : the code used as "autolog" argument. If thie code provided by the
          visitor does not exist in the table, the administrator can choose
          whether the visitor is redirected to the home page (nothing
          happens) or to the "access denied" page ;
user_id : the account concerned in following values ;
action  : the action to perform :
   ec_nok : code disabled : account not logged in, visitor (guest) redirected
            to an explaining Additional Page (arg2 field). If Additional Page
            plugin is not activated, redirection to the "access denied" page ;
   ec_ok  : code OK, account logged in. Redirection depends on arg1 and arg2
            values. There are four cases :
     arg1 and arg2 are both NULL : home page ;
     arg1 not NULL and arg2 NULL : category ;
     arg1 NULL and arg2 not NULL : Additional Page ;
     arg1 and arg2 both not NULL : Image page.
            If arg1 is a valid category id, and arg2 is not a valid image id,
            redirection to category. In all other cases where the arg1 or arg2
            is not valid, redirection to home page.
arg1    : (described above) ;
arg2    : (described above) ;
forced  : allows the administrator to impose that, for certain codes, the
          settings specified in the database ("action", "arg1", "arg2") are
          applied, whatever can be the arguments given in the URL.
           
* As a precision :
    in the PHP code, the "action" can also have the following values, so to
    display accurate messages in the admin page :
  ec_nok_action_pb   : the same "code" is used in more than one entries in the
                       DB (which is allowed) and is not always associated to
                       the same action ('ec_ok' in one or more entries, and
                       'ec_nok' in one or more other entries). This is
                       confusing and makes impossible to log in using this
                       code ;
  ec_nok_userid_pb   : the same "code" is used in more than one entries in the
                       DB (which is allowed) and is not always associated to
                       the same user id. This is confusing and makes
                       impossible to log in using this code ;
  ec_nok_userid_miss : the user id associated to this code does not exist in
                       the user ids table ;
  ec_nok_ap_pb       : not valid Additional Page id -> access denied ;
  ec_ok_ap_pb        : not valid Additional Page id -> home page ;
  ec_ok_cat_pb       : not valid category id -> home page ;
  ec_ok_img_pb       : not valid image id -> category page ;

_ the two main fields are "user_id" and "code", as the main purpose of the
  plugin, and thus of the table, is to establish a relationship between a
  code and an account on the gallery -- a user_id. "action" is an important
  field too, as it tells which action to perform.
_ though, even if "action", "user_id" and "code" are important, all of them
  can be omitted (thus can be NULL), and both "user_id" and "code" can be
  repeated (thus are not UNIQUE). This because :
  _ the same code can automatically log in ("autolog") the same account
    following several ways, depending on "cat", "img", and "ap" arguments of
    the URL ; and thus different ways can be stored in the DB ;
  _ a "disabled" code (the user tries to "autolog", but (s)he's not allowed
    to) does not need a corresponding "user_id", thus "user_id" can be NULL ;
  _ "user_id" field is used to store groups ids when "code" is NULL, to
    identify groups authorized to duplication ;
_ "code" does not have the MySQL UNIQUE attribute, but it has to be unique
  when the "forced" Event Cats parameter is true, which is the case when this
  code is disabled (outdated).

*/
  pwg_query("
    INSERT INTO `".CONFIG_TABLE."` (`param`,`value`,`comment`)
    VALUES ('event_cats','0','Paramètres du plugin Event Cats');
  ");
  change_ec_conf('activated', '0');
  return $q;
}

function plugin_activate() {
  change_ec_conf('activated', '1');
}

function plugin_deactivate() {
  change_ec_conf('activated', '0');
}

?>