<?php
	/**
	 * Copyright 2000, 2001, 2002 Philipp von Klitzing
	 * Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Wim van Ravesteijn
	 *
	 * This file is part of AEGEE-Europe Statutory Event Applications.
	 *
	 * AEGEE-Europe Statutory Event Applications 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, either
	 * version 3 of the License, or (at your option) any later version.
	 *
	 * AEGEE-Europe Statutory Event Applications 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 AEGEE-Europe Statutory Event Applications.  If not, see
	 * <http://www.gnu.org/licenses/>.
	 */
	abstract class Appl {
		const ACCESS_RW = 2;
		const ACCESS_R = 1;
		const ACCESS_NO = 0;
	
		protected $appl_id;
		protected $name;
		protected $value;
		protected $oldvalue;
		protected $compulsory = false;
		protected $access = -1;
		protected $error = false;
		protected $error_txt = "";

		abstract public function __construct($appl_id);

		public function __destruct() {
			// Destructor
		}

		abstract public function get_print_name();
		abstract public function get_print_name_short();
		abstract public function get_print_value($readonly=false);
		abstract public function set($value);
		
		public function init($value) {
			if( $this->set($value) ) $this->oldvalue=$value;
			else $this->oldvalue="";
		}
		
		public function check() {
			$this->error = false;
			if( isset($_POST[ $this->name ]) ) {
				$this->value = stripslashes(trim($_POST[ $this->name ]));
				return $this->set( $this->value );
			}else {
				$this->error = true;
				$this->error_txt = "The field " . $this->name . " hasn't been filled in.";
				return false;
			}
		}

		public function get($oldvalue=false) {
			if( $oldvalue ) return $this->oldvalue;
			else return $this->value;
		}
		
		public function is_error() {
			return $this->error;
		}
		
		public function get_error() {
			if( $this->error ) {
				return $this->error_txt;
			}else {
				return "";
			}
		}
		
		public function get_compulsory() {
			return $this->compulsory;
		}

		public function get_access($new=true) {
			if( $this->access>=0 ) return $this->access;
			elseif( isset($_SESSION['sess_functions']) && in_array("application_edit", $_SESSION['sess_functions']) ) return self::ACCESS_RW;
			elseif( isset($_SESSION['sess_functions']) && in_array("application_viewdetail", $_SESSION['sess_functions']) ) return self::ACCESS_R;
			elseif( is_anon() AND $new ) return self::ACCESS_RW;
			elseif( isset($_SESSION['access_user']) && $_SESSION['access_user'] ) return self::ACCESS_RW;
			else return self::ACCESS_NO;
		}

		public function set_access($value) {
			if( $value>=0 AND $value<=2 ) $this->access = $value;
		}

		/*
		 * get_sql(): Returns an array $var[item]=value
		 * @param: -
		 * @return: array $var[item]=value
		 */
		public function get_sql($new=true) {
			if( $this->get_access($new)==Appl::ACCESS_RW ) return array($this->name => $this->value);
			else return array();
		}

		public function get_value($new=true) {
			$r = array();
			if( !$new ) $r['old'][$this->get_print_name()] = $this->get(true);
			if( $this->get_access($new)==Appl::ACCESS_RW OR ($new AND $this->get_access($new)==Appl::ACCESS_R) ) $r['new'][$this->get_print_name()] = $this->get();
			return $r;
		}

		public function display($value, $PersonID=0, &$allvalues="") {
			return $value;
		}

		// Return the value to be shown on screen (text only)
		public function displaytext($value, $PersonID=0, &$allvalues="") {
			return $this->display($value, $PersonID, $allvalues);
		}

		public function displaytitle($value) {
			return "";
		}

		public function displayoptions($personID=0) {
			return "";
		}

		public function sql_columnname() {
			return "`persons`.`".$this->name."`";
		}

		public function is_sqlcolumn() {
			return true;
		}
	}
?>