DocumentLink.inc
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<?php
/**
*
* Class DocumentLink
*
* Represents a document link as per the database document_link table
* Links a child document to a parent document. Direction of relationship
* is defined through document collaboration
*
* @author Rob Cherry, Jam Warehouse (Pty) Ltd, South Africa
* @date 14 May 2003
* @package lib.documentmanagement
*/
class DocumentLink {
/** primary key value */
var $iId;
/** primary key of user responsible for creating document */
var $iParentDocumentID;
/** document title name */
var $iChildDocumentID;
/**
* Default constructor
*
* @param Name of document field
* @param Document field data type
*
*/
function DocumentLink($iNewParentDocumentID, $iNewChildDocumentID) {
//object not created yet
global $default;
$this->iID = -1;
$this->iParentDocumentID = $iNewParentDocumentID;
$this->iChildDocumentID = $iNewChildDocumentID;
}
/**
* 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 parent document
*/
function getParentDocumentID() {
return $this->iParentDocumentID;
}
/**
* Set the primary key of the parent document
*
* @param Primary key of parent document
*
*/
function setParentDocumentID($iNewValue) {
$this -> iParentDocumentID = $iNewValue;
}
/**
* Get the child document's primary key
*
* @return int primary key of child document
*
*/
function getChildDocumentID() {
return $this->iChildDocumentID;
}
/**
* Set the child document's primary key
*
* @param Primary key of child document
*
*/
function setChildDocumentID($iNewValue) {
$this -> iChildDocumentID = $iNewValue;
}
/**
* Store the current object in the database
*
* @return boolean on successful store, false otherwise and set $_SESSION["errorMessage"]
*
*/
function create() {
global $default, $lang_err_database, $lang_err_object_exists;
//if the object hasn't been created
if ($this -> iId < 0) {
$sql = $default -> db;
$result = $sql -> query("INSERT INTO " . $default -> owl_document_link_table . " (parent_document_id, child_document_id) VALUES ($this->iParentDocumentID, $this->iChildDocumentID)");
if ($result) {
$this -> iId = $sql -> insert_id();
return true;
}
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
$_SESSION["errorMessage"] = $lang_err_object_exists."id = ".$this -> iId." table = document_fields";
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, $lang_err_database, $lang_err_object_key;
//only update if the object has been stored
if ($this -> iId > 0) {
$sql = $default -> db;
$result = $sql -> query("UPDATE ".$default -> owl_document_link_table." SET parent_document_id = $this->iParentDocumentID, child_document_id = $this->iChildDocumentID WHERE id = $this->iId");
if ($result) {
return true;
}
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
$_SESSION["errorMessage"] = $lang_err_object_key;
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, $lang_err_database, $lang_err_object_key;
//only delete the object if it exists in the database
if ($this -> iId >= 0) {
$sql = $default -> db;
$result = $sql -> query("DELETE FROM $default->owl_document_link_table WHERE id = $this->iId");
if ($result) {
return true;
}
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
$_SESSION["errorMessage"] = $lang_err_object_key;
return false;
}
/**
* Static function.
* Given a document_fields primary key it will create a
* DocumentFields object and populate it with the
* corresponding database values
*
* @return DocumentField populated DocumentField object on successful query, false otherwise and set $_SESSION["errorMessage"]
*/
function & get($iDocumentLinkID) {
global $default;
$sql = $default -> db;
$result = $sql -> query("SELECT * FROM $default->owl_document_link_table WHERE id = $iDocumentLinkID");
if ($result) {
if ($sql -> next_record()) {
$oDocumentLink = & new DocumentLink($sql -> f("parent_document_id"), $sql -> f("parent_document_id"));
$oDocumentLink -> iId = $sql -> f("id");
return $oDocumentLink;
}
$_SESSION["errorMessage"] = $lang_err_object_not_exist."id = ".$iDocumentLinkID." table = $default->owl_document_link_table";
return false;
}
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
}
?>