SubscriptionManager.inc
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<?php
/**
* $Id$
*
* Facilitates adding and removing file and folder subscriptions.
*
* KnowledgeTree Community Edition
* Document Management Made Simple
* Copyright (C) 2008, 2009, 2010 KnowledgeTree Inc.
*
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 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, see <http://www.gnu.org/licenses/>.
*
* You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco,
* California 94120-7775, or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*/
require_once(KT_LIB_DIR . "/subscriptions/Subscription.inc");
require_once(KT_LIB_DIR . "/subscriptions/subscriptions.inc.php");
class SubscriptionManager {
/**
* Creates a subscription.
*
* @param int the user to create the subscription for
* @param int the external id to create the subscription for
* @param int the subscription type
* @return true if the subscription creation succeed, false and error message otherwise
*/
function createSubscription($iUserID, $iExternalID, $iSubscriptionType) {
global $lang_sub_exists;
if (!Subscription::exists($iUserID, $iExternalID, $iSubscriptionType)) {
$oSubscription = new Subscription($iUserID, $iExternalID, $iSubscriptionType);
if ($oSubscription->create()) {
return true;
} else {
// error message set in Subscription::create
return false;
}
} else {
// TODO: lookup username and folder name from ids for error message
$_SESSION["errorMessage"] = $lang_sub_exists . " type=$iSubscriptionType, ID=$iExternalID, userID=$iUserID";
return false;
}
}
/**
* Removes all subscriptions
*
* @param int the user to create the subscription for
* @param int the external id to create the subscription for
* @param int the subscription type
* @return true if the subscription creation succeed, false and error message otherwise
*/
function removeSubscriptions($iExternalID, $iSubscriptionType ) {
global $lang_sub_not_exists;
// first retrieve all the subscribers to this content
$aSubscriptions = SubscriptionManager::retrieveSubscriptions($iExternalID, $iSubscriptionType);
$bResult = true;
for ($i = 0; $i < count($aSubscriptions); $i++) {
// delete them
if ($aSubscriptions[$i]->delete()) {
$bResult = $bResult && true;
} else {
$bResult = $bResult && false;
}
}
return $bResult;
}
/**
* Retrieves all subscriptions for the specified content.
*
* @param int the external id to create the subscription for
* @param int the subscription type
*/
function retrieveSubscriptions($iExternalID, $iSubscriptionType) {
global $default;
$sql = $default->db;
if ($sql->query(array("SELECT id FROM " . Subscription::getTableName($iSubscriptionType) . " " ./*ok*/
"WHERE " . Subscription::getIdFieldName($iSubscriptionType) . " = ?", $iExternalID))) {
$aSubscriptions = array();
while ($sql->next_record()) {
$aSubscriptions[] = & Subscription::get($sql->f("id"), $iSubscriptionType);
}
} else {
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
return $aSubscriptions;
}
/**
* Clears the alert from the selected subscription and returns the
* path to the document.
*
* @param int the subscription ID to view
* @param int the subscription type
* @return string link to the subscription content, false if the operation failed
*/
function viewSubscription($iSubscriptionID, $iSubscriptionType) {
// instantiate subscription from id
$oSubscription = Subscription::get($iSubscriptionID, $iSubscriptionType);
if ($oSubscription) {
// update the alerted flag
$oSubscription->setIsAlerted(false);
// save the update
if ($oSubscription->update()) {
// return the url to the content
return $oSubscription->getContentUrl();
} else {
// error message set by Subscription::updates
return false;
}
} else {
// error message set by Subscription::get
return false;
}
}
/**
* Retrieves all subscriptions for this user.
*
* @param integer the ID of the user to retrieve subscriptions for
* @return array of subscription objects
*/
function listSubscriptions($iUserID) {
return $aSubscriptions = kt_array_merge(SubscriptionManager::retrieveUserSubscriptions($iUserID, SubscriptionEvent::subTypes('Folder')),
SubscriptionManager::retrieveUserSubscriptions($iUserID, SubscriptionEvent::subTypes('Document')));
}
/**
* Retrieves the users's subscriptions
*
* @param integer the ID of the user to retrieve subscriptions for
* @return array of subscription objects, false if the database interaction fails
*/
function retrieveUserSubscriptions($iUserID, $iSubscriptionType) {
$table = Subscription::getTableName($iSubscriptionType); // EVIL!
$aQuery = array(
"SELECT id FROM $table WHERE user_id = ?",
$iUserID,
);
$res = DBUtil::getResultArrayKey($aQuery, 'id');
if (PEAR::isError($res)) {
// isn't this hideous?
$_SESSION['_ktErrorMessage'][] = $res->getMessage();
return false;
}
$items = array();
foreach ($res as $id) {
$item = Subscription::get($id, $iSubscriptionType);
if ($item->isValid()) {
$items[] = $item;
}
}
return $items;
}
/**
* Retrieves all alerted subscriptions for this user.
*
* @param integer the ID of the user to retrieve alerted subscriptions for
* @return array of subscription objects
*/
function listSubscriptionAlerts($iUserID) {
return $aSubscriptions = kt_array_merge(SubscriptionManager::retrieveSubscriptionAlerts($iUserID, SubscriptionEvent::subTypes("Folder")),
SubscriptionManager::retrieveSubscriptionAlerts($iUserID, SubscriptionEvent::subTypes("Document")));
}
/**
* Retrieves the users's subscriptions
*
* @param integer the ID of the user to retrieve subscriptions for
* @return array of subscription objects, false if the database interaction fails
*/
function retrieveSubscriptionAlerts($iUserID, $iSubscriptionType) {
global $default;
$sql = $default->db;
if ($sql->query(array("SELECT id FROM " . Subscription::getTableName($iSubscriptionType) . " " ./*ok*/
"WHERE user_id = ? " .
"AND is_alerted = ?", array($iUserID, true)))) {
$aSubscriptions = array();
while ($sql->next_record()) {
$aSubscriptions[] = & Subscription::get($sql->f("id"), $iSubscriptionType);
}
} else {
$_SESSION["errorMessage"] = $lang_err_database;
return false;
}
return $aSubscriptions;
}
}
?>