<?php
/**
 * $Id$
 *
 * Represents a dependant document instance as per the database table dependant_document_instance.
 * Used to chain documents together in the collaboration process/
 *
 * Copyright (c) 2003 Jam Warehouse http://www.jamwarehouse.com
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * 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
 *
 * @version $Revision$
 * @author Rob Cherry, Jam Warehouse (Pty) Ltd, South Africa
 * @package lib.documentmanagement 
 */
class DependantDocumentInstance {

	/** primary key value */
	var $iId;
	/** primary key of user responsible for creating document */
	var $iUserID;
	/** document title name */	
	var $sDocumentTitle;
	/** primary key of document to use as template */
	var $iTemplateDocumentID;
	/** parent document to which this document will be linked */
	var $iParentDocumentID;	

	/**
	* Default constructor
	*
	* @param 	Name of document field
	* @param 	Document field data type
	*
	*/
	function DependantDocumentInstance($sNewDocumentTitle, $iNewUserID, $iNewTemplateDocumentID, $iNewParentDocumentID) {
		//object not created yet
		global $default;
		$this->iId = -1;
		$this->sDocumentTitle = $sNewDocumentTitle;
		$this->iUserID = $iNewUserID;
		$this->iTemplateDocumentID = $iNewTemplateDocumentID;
		$this->iParentDocumentID = $iNewParentDocumentID;
	}

	/**
	* Get the document field's primary key value
	*
	* @return int document field's primary key value
	*
	*/
	function getID() {
		return $this->iId;
	}

	/**
	* Get the primary key of the user responsbile for new document creation
	*/
	function getUserID() {
		return $this->iUserID;
	}

	/**
	* Set the document field's name
	*
	* @param 	Document field's new name
	*
	*/
	function setDocumentTitle($sNewValue) {
		$this->sDocumentTitle = $sNewValue;
	}

	/**
	* Get the depedant document's title
	*
	* @return String dependant document's title	*
	*/
	function getDocumentTitle() {
		return $this->sDocumentTitle;
	}

	
	/**
	* Get the primary key of the template document
	*
	* @return int Primary key of template document
	*
	*/
	function getTemplateDocumentID() {
		return $this->iTemplateDocumentID;
	}

	/**
	* Set the template document's primary key
	*
	* @param 	Template document's primary key
	*
	*/
	function setHasLookup($sNewValue) {
		$this->iTemplateDocumentID = $sNewValue;
	}
	
	function getParentDocumentID() {
		return $this->iParentDocumentID;
	}

	/**
	* Store the current object in the database
	*
	* @return boolean on successful store, false otherwise and set $_SESSION["errorMessage"]
	*
	*/
	function create() {
		global $default;		
		//if the object hasn't been created
		if ($this->iId < 0) {
            $sTable = $default->dependant_document_instance_table;
            $aFieldValues = array(
                'document_title' => $this->sDocumentTitle,
                'user_id' => $this->iUserID,
                'template_document_id' => $this->iTemplateDocumentID,
                'parent_document_id' => $this->iParentDocumentID,
            );
            $id =& DBUtil::autoInsert($sTable, $aFieldValues);

            if (PEAR::isError($id)) {
                $_SESSION["errorMessage"] = $id->toString();
                return false;
            }
            $this->iId = $id;
            return true;
		}				
		return false;
	}

	/**
	* Update the values in the database table with the object's current values
	*
	* @return boolean true on successful update, false otherwise and set $_SESSION["errorMessage"]
	*
	*/
	function update() {
		global $default;
		//only update if the object has been stored
		if ($this->iId > 0) {
			$sql = $default->db;
			$result = $sql->query("UPDATE $default->dependant_document_instance_table SET document_title = '$this->sDocumentTitle', user_id = $this->iUserID, template_document_id = $this->iTemplateDocumentID, parent_document_id = $this->iParentDocumentID WHERE id = $this->iId");
			if ($result) {
				return true;
			}
			return false;
		}
		return false;
	}

	/**
	* Delete the current object from the database
	*
	* @return boolean true on successful deletion, false otherwise and set $_SESSION["errorMessage"]
	*
	*/
	function delete() {
		global $default;
		//only delete the object if it exists in the database
		if ($this->iId >= 0) {
			$sql = $default->db;
			$result = $sql->query("DELETE FROM $default->dependant_document_instance_table WHERE id = $this->iId");
			if ($result) {
				return true;
			}
			return false;
		}
		return false;
	}

	/**
	* Static function.
	* Given a dependant_documents primary key it will create a 
	* DependantDocument object and populate it with the 
	* corresponding database values
	*
	* @return DependantDocument populated DependantDocument object on successful query, false otherwise and set $_SESSION["errorMessage"]
	*/
	function & get($iDependantDocumentID) {
		global $default;
		$sql = $default->db;
		$result = $sql->query("SELECT * FROM $default->dependant_document_instance_table WHERE id = $iDependantDocumentID");
		if ($result) {
			if ($sql->next_record()) {
				$oDependantDocument = & new DependantDocumentInstance($sql->f("document_title"), $sql->f("user_id"), $sql->f("template_document_id"), $sql->f("parent_document_id"));
				$oDependantDocument->iId = $sql->f("id");
				return $oDependantDocument;
			}
			$_SESSION["errorMessage"] = $lang_err_object_not_exist."id = ".$iDependantDocumentID." table = $default->dependant_document_instance_table";
			return false;
		}
		$_SESSION["errorMessage"] = $lang_err_database;
		return false;
	}
}

?>