<?php
/*+**********************************************************************************
 * The contents of this file are subject to the vtiger CRM Public License Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * The Original Code is:  vtiger CRM Open Source
 * The Initial Developer of the Original Code is vtiger.
 * Portions created by vtiger are Copyright (C) vtiger.
 * All Rights Reserved.
 ************************************************************************************/

require_once 'modules/WSAPP/Utils.php';
require_once 'include/database/PearDatabase.php';
require_once 'include/Zend/Json.php';
require_once 'include/utils/utils.php';

class SyncServer {
		private $appkey;
		private $syncModule;
		private $destHandler;
		private $create = "create";
		private $update = "update";
		private $delete = "delete";
		private $save = "save";
		private $syncTypes = array("user","app","userandgroup");


	/**
	 * Lookup application id using the key provided.
	 */
	function appid_with_key($key) {
		$db = PearDatabase::getInstance();
		$appidresult = $db->pquery("SELECT appid FROM vtiger_wsapp WHERE appkey=?", array($key));
		if ($db->num_rows($appidresult)) return $db->query_result($appidresult, 0, 'appid');
		return false;
	}

	/**
	 * Retrieve serverid-clientid record map information for the given 
	 * application and serverid
	 */
	function idmap_get_clientmap($appid, $serverids) {
		if (!is_array($serverids)) $serverids = array($serverids);
		$db = PearDatabase::getInstance(); 		;
		$result = $db->pquery(sprintf(
			"SELECT serverid, clientid,clientmodifiedtime,servermodifiedtime,id FROM vtiger_wsapp_recordmapping WHERE appid=? AND serverid IN ('%s')",
			implode("','", $serverids)), array($appid));

		$mapping = array();
		if ($db->num_rows($result)) {
			while ($row = $db->fetch_array($result)) {
				$mapping[$row['serverid']] = array("clientid"=>$row['clientid'],"clientmodifiedtime"=>$row['clientmodifiedtime'],
					"servermodifiedtime"=>$row['servermodifiedtime'],"id"=>$row['id']);
			}
		}
		return $mapping;
	}

		/**
	 * Retrieve serverid-clientid record map information for the given
	 * application and client
	 */
	function idmap_get_clientservermap($appid,$clientids){
		if(!is_array($clientids)) $clientids = array($clientids);

		$db = PearDatabase::getInstance();

		$result = $db->pquery(sprintf(
		"SELECT serverid, clientid FROM vtiger_wsapp_recordmapping WHERE appid=? AND clientid IN ('%s')",
		implode("','", $clientids)), array($appid));
		$mapping = array();
		if($db->num_rows($result)){
			while($row = $db->fetch_array($result)){
				$mapping[$row['clientid']] = $row['serverid'];
			}
		}
		return $mapping;
	}

	function idmap_storeRecordsInQueue($syncServerId,$recordDetails,$flag,$appid){
		if(!is_array($recordDetails))
			$recordDetails = array($recordDetails);
		$db = PearDatabase::getInstance();
		$params = array();
		$params[] = $syncServerId;
		$params[] = Zend_Json::encode($recordDetails);
		$params[] = $flag;
		$params[] = $appid;
		$db->pquery("INSERT INTO vtiger_wsapp_queuerecords(syncserverid,details,flag,appid) VALUES(?,?,?,?)",array($params));
	}

	function checkIdExistInQueue($syncServerId){
		$db = PearDatabase::getInstance();
		$checkQuery = "SELECT syncserverid FROM vtiger_wsapp_queuerecords WHERE syncserverid=?";
		$result = $db->pquery($checkQuery,array($syncServerId));
		if($db->num_rows($result)>0)
				return true;
		return false;
	}

	function markRecordAsDeleteForAllCleints($recordValues){
		$recordWsId = $recordValues['id'];
		$modifiedTime = $recordValues['modifiedtime'];
		$db = PearDatabase::getInstance();
		$query = "SELECT * FROM vtiger_wsapp_recordmapping WHERE serverid=? and servermodifiedtime < ?";
		$params = array($recordWsId,$modifiedTime);
		$result = $db->pquery($query,$params);
		while($arre = $db->fetchByAssoc($result)){
			$syncServerId = $arre["id"];
			$clientId = $arre["clientid"];
			$clientMappedId = $arre["appid"];
			if(!$this->checkIdExistInQueue($syncServerId)){
				$this->idmap_storeRecordsInQueue($syncServerId,$recordValues,$this->delete,$clientMappedId);
			}
		}
	}

	function getSyncServerId($clientId,$serverId,$clientAppId){
		$db = PearDatabase::getInstance();
		$syncServerId = NULL;
		$query = "SELECT id FROM vtiger_wsapp_recordmapping WHERE clientid=? and serverid=? and appid=?";
		$result = $db->pquery($query,array($clientId,$serverId,$clientAppId));
		if($db->num_rows($result)>0){
			$syncServerId = $db->query_result($result,0,'id');
		}
		return $syncServerId;
	}

	function deleteQueueRecords($syncServerIdList){
		$db= PearDatabase::getInstance();
		$deleteQuery = "DELETE FROM vtiger_wsapp_queuerecords WHERE syncserverid IN (".generateQuestionMarks($syncServerIdList).")";
		$result = $db->pquery($deleteQuery,$syncServerIdList);
	}

	/**
	 * Create serverid-clientid record map for the application
	 */
	function idmap_put($appid, $serverid, $clientid,$clientModifiedTime,$serverModifiedTime,$serverAppId,$mode="save") {
		$db = PearDatabase::getInstance(); 
		if($mode == $this->create)
			$this->idmap_create($appid, $serverid, $clientid,$clientModifiedTime,$serverModifiedTime,$serverAppId);
		else if ($mode == $this->update)
			$this->idmap_update($appid, $serverid, $clientid, $clientModifiedTime,$serverModifiedTime,$serverAppId);
		else if($mode==$this->save){
			$result = $db->pquery("SELECT 1 FROM vtiger_wsapp_recordmapping WHERE appid=? and serverid=? and clientid=?",array($appid,$serverid,$clientid));
			if($db->num_rows($result)<=0)
				$this->idmap_create($appid, $serverid, $clientid, $clientModifiedTime,$serverModifiedTime,$serverAppId);
			else
				$this->idmap_update($appid, $serverid, $clientid, $clientModifiedTime,$serverModifiedTime,$serverAppId);
		}
		else if ($mode == $this->delete)
			$this->idmap_delete($appid, $serverid, $clientid,$serverAppId);
	}

	/**
	 *
	 * @param  $appid
	 * @param  $serverid
	 * @param  $clientid
	 * @param  $modifiedTime
	 * create mapping for server and client id
	 */
	function idmap_create($appid, $serverid, $clientid,$clientModifiedTime,$serverModifiedTime,$serverAppId){
		$db = PearDatabase::getInstance();
		$db->pquery("INSERT INTO vtiger_wsapp_recordmapping (appid, serverid, clientid,clientmodifiedtime,servermodifiedtime,serverappid) VALUES (?,?,?,?,?,?)",
							array($appid, $serverid, $clientid,$clientModifiedTime,$serverModifiedTime,$serverAppId));
	}

	/**
	 *
	 * @param <type> $appid
	 * @param <type> $serverid
	 * @param <type> $clientid
	 * @param <type> $modifiedTime
	 * update the mapping of server and client id
	 */
	function idmap_update($appid, $serverid, $clientid,$clientModifiedTime,$serverModifiedTime,$serverAppId){
		$db = PearDatabase::getInstance();
		$db->pquery("UPDATE vtiger_wsapp_recordmapping SET clientmodifiedtime=?,servermodifiedtime=? WHERE appid=? and serverid=? and clientid=? and serverappid=?",
							array($clientModifiedTime,$serverModifiedTime,$appid, $serverid, $clientid,$serverAppId));
	}

	/**
	 *
	 * @param <type> $appid
	 * @param <type> $serverid
	 * @param <type> $clientid
	 * delete the mapping for client and server id
	 */
	function idmap_delete($appid, $serverid, $clientid,$serverAppId){
		$db = PearDatabase::getInstance();
		$db->pquery("DELETE FROM vtiger_wsapp_recordmapping WHERE appid=? and serverid=? and clientid=? and serverappid=?",
							array($appid, $serverid, $clientid,$serverAppId));
	}


	function idmap_updateMapDetails($appid,$clientid,$clientModifiedTime,$serverModifiedTime){
		$db = PearDatabase::getInstance();
		$db->pquery("UPDATE vtiger_wsapp_recordmapping SET clientmodifiedtime=?,servermodifiedtime=? WHERE appid=? and clientid=?",
							array($clientModifiedTime,$serverModifiedTime,$appid, $clientid));
	}

	function getDestinationHandleDetails(){
		return wsapp_getHandler('vtigerCRM');
	}


	/*****************
	 * Web services
	 *****************/

	/**
	 * Register the application
	 */
	function register($name,$type) {
		if (empty($name)) {
			throw new WebServiceException('WSAPP01',"No type specified");
		}
		if(empty($type)){
			throw new WebServiceException('WSAPP06',"No sync type specified");
		}
		if(is_array($name))
			throw new WebServiceException("WSAPP07","type is in the wrong format");
		$type = strtolower($type);
		if(!in_array($type, $this->syncTypes))
			throw new WebServiceException('WSAPP05',"Wrong sync type specified");
		$db = PearDatabase::getInstance();
		$uid = uniqid();
		$db->pquery("INSERT INTO vtiger_wsapp (name, appkey,type) VALUES(?,?,?)", array($name, $uid,$type));

		return array('key' => $uid);
	}

	/**
	 * Deregister the application
	 */
	function deregister($name, $key, $user) {
		if (!empty($name) && !empty($key)) {
			$db = PearDatabase::getInstance();
			$uid = uniqid();
			$db->pquery("DELETE FROM vtiger_wsapp_recordmapping WHERE appid=(SELECT appid FROM vtiger_wsapp WHERE name=? AND appkey=?)",
				array($name, $key));
			$db->pquery("DELETE FROM vtiger_wsapp WHERE name=? AND appkey=?", array($name, $key));
		}
		return array ($name, $key);
	}


	/**
	 * Handles Create/Update/Delete operations on record
	 */
	function put($key, $element, $user) {
		$db = PearDatabase::getInstance();
		$appid = $this->appid_with_key($key);

		if (empty($appid)) {
			throw new WebServiceException('WSAPP04',"Access restricted to app");
		}

		if (!is_array($element)) $records = array($element);
		else $records = $element;

		//hardcoded since the destination handler will be vtigerCRM
		$serverKey = wsapp_getAppKey("vtigerCRM");
		$serverAppId = $this->appid_with_key($serverKey);
		$handlerDetails  = $this->getDestinationHandleDetails();
		$clientApplicationSyncType = wsapp_getAppSyncType($key);
		require_once $handlerDetails['handlerpath'];
		$this->destHandler = new $handlerDetails['handlerclass']($serverKey);
		$this->destHandler->setClientSyncType($clientApplicationSyncType);

		$recordDetails = array();

		$createRecords = array();
		$updateRecords = array();
		$deleteRecords = array();

		$clientModifiedTimeList = array();
		foreach ($records as $record) {
			$recordDetails = array();
			$clientRecordId = $record['id'];

			// Missing client record id?
			if (empty($clientRecordId)) continue;

			$lookupRecordId = false;
			$lookupResult = $db->pquery("SELECT serverid,clientmodifiedtime FROM vtiger_wsapp_recordmapping WHERE appid=? AND clientid COLLATE utf8_bin =?", array($appid, $clientRecordId));
			if ($db->num_rows($lookupResult)) $lookupRecordId = $db->query_result($lookupResult, 0, 'serverid');
			if (empty($lookupRecordId) && $record['mode'] !="delete") {
				$createRecords[$clientRecordId] = $record['values'];
				$createRecords[$clientRecordId]['module'] = $record['module'];
				$clientModifiedTimeList[$clientRecordId] = $record['values']['modifiedtime'];
			} else {
				if (empty($record['values']) && !(empty($lookupRecordId)) ) {
					$deleteRecords[$clientRecordId] = $lookupRecordId;
				}
				else if (!(empty($lookupRecordId))) {
					$clientLastModifiedTime = $db->query_result($lookupResult,0,'clientmodifiedtime');
					if($clientLastModifiedTime >= $record['values']['modifiedtime'])
						continue;
					$record['values']['id'] = $lookupRecordId;
					$updateRecords[$clientRecordId] = $record['values'];
					$updateRecords[$clientRecordId]['module'] = $record['module'];
					$clientModifiedTimeList[$clientRecordId] = $record['values']['modifiedtime'];

				}
			}
		}

	   $recordDetails['created'] = $createRecords;
	   $recordDetails['updated'] = $updateRecords;
	   $recordDetails['deleted'] = $deleteRecords;
	   $result = $this->destHandler->put($recordDetails,$user);

	   $response= array();
	   $response['created'] = array();
	   $response['updated'] = array();
	   $response['deleted'] = array();
	   $clientID2ServerIDMap = array();

	   $nextSyncDeleteRecords = $this->destHandler->getAssignToChangedRecords();
	   foreach($result['created'] as $clientRecordId=>$record){
		   $this->idmap_put($appid, $record['id'], $clientRecordId,$clientModifiedTimeList[$clientRecordId],$record['modifiedtime'],$serverAppId);
		   $responseRecord = $record;
		   $responseRecord['_id'] = $record['id'];
		   $responseRecord['id'] = $clientRecordId;
		   $responseRecord['_modifiedtime'] = $record['modifiedtime'];
		   $responseRecord['modifiedtime'] = $clientModifiedTimeList[$clientRecordId];
		   $response['created'][] = $responseRecord;
	   }
	   foreach($result['updated'] as $clientRecordId=>$record){
		   $this->idmap_put($appid, $record['id'], $clientRecordId,$clientModifiedTimeList[$clientRecordId],$record['modifiedtime'],$serverAppId);
		   $responseRecord = $record;
		   $responseRecord['_id'] = $record['id'];
		   $responseRecord['id'] = $clientRecordId;
		   $responseRecord['_modifiedtime'] = $record['modifiedtime'];
		   $responseRecord['modifiedtime'] = $clientModifiedTimeList[$clientRecordId];
		   $response['updated'][] = $responseRecord;
	   }
	   foreach($result['deleted'] as $clientRecordId=>$record){
		   $this->idmap_put($appid, $record, $clientRecordId,"","",$serverAppId,$this->delete);
		   $response['deleted'][] = $clientRecordId;
		   $clientID2ServerIDMap[$clientRecordId] = $record; // For WSAPP logs
	   }
	   $queueRecordIds = array();
	   $queueRecordDetails = array();
	   foreach($nextSyncDeleteRecords as $clientRecordId=>$record){
		   $queueRecordIds[] = $record['id'];
		   $queueRecordDetails[$record['id']] = $this->convertToQueueRecordFormat($record, $this->delete);
	   }
	   if(php7_count($queueRecordIds > 0)){
		   $syncServerDetails = $this->idmap_get_clientmap($appid,$queueRecordIds);
		   foreach($queueRecordIds as $serverId){
			   $syncServerId = $syncServerDetails[$serverId]['id'];
			   $recordValues = $queueRecordDetails[$serverId];
			   if(!$this->checkIdExistInQueue($syncServerId)){
					$this->idmap_storeRecordsInQueue($syncServerId, $recordValues, $this->delete,$appid);
			   }
		   }
	   }

	   if(array_key_exists('skipped', $result)) {
		   $response['skipped'] = $result['skipped'];
	   }

		$response['client2serverIdMap'] = $clientID2ServerIDMap;
		return $response;
	}

	/**
	 * Share the Create/Update/Delete state information
	 */
	function get($key, $module, $token, $user) {
		$db = PearDatabase::getInstance();
		$appid = $this->appid_with_key($key);
		if (empty($appid)) {
			throw new WebServiceException('WSAPP04',"Access restricted to app");
		}
		$clientApplicationSyncType = wsapp_getAppSyncType($key);
		//hardcoded since the destination handler will be vtigerCRM
		$serverKey = wsapp_getAppKey("vtigerCRM");
		$handlerDetails  = $this->getDestinationHandleDetails();
		require_once $handlerDetails['handlerpath'];
		$this->destHandler = new $handlerDetails['handlerclass']($serverKey);
		$this->destHandler->setClientSyncType($clientApplicationSyncType);
		$result = $this->destHandler->get($module, $token,$user);
		// Lookup Ids
		$updatedIds = array(); $deletedIds = array();
		foreach($result['updated'] as $u){
			$updatedIds[] = $u['id'];
		}
		foreach($result['deleted'] as $d){
			$deletedIds[] = $d;
		}
		$syncServerDeleteIds = $this->getQueueDeleteRecord($appid);
		foreach($syncServerDeleteIds as $deleteServerId){
			$deletedIds[] = $deleteServerId;
		}

		$updateDeleteCommonIds = array_values(array_intersect($updatedIds,$deletedIds));
		//if the record exist in both the update and delete , then send record as update
		// and unset the id from deleted list
		$deletedIds = array_diff($deletedIds,$updateDeleteCommonIds);

		$updatedLookupIds = $this->idmap_get_clientmap($appid, $updatedIds);
		$deletedLookupIds = $this->idmap_get_clientmap($appid, $deletedIds);
		$filteredCreates = array(); $filteredUpdates = array();
		foreach ($result['updated'] as $u) {
			if(in_array($u['id'],$updatedIds)){
				if (isset($updatedLookupIds[$u['id']]) && ($u['modifiedtime'] > $updatedLookupIds[$u['id']]['servermodifiedtime'])) {
					$u['_id'] = $u['id'];
					$u['id'] = $updatedLookupIds[$u['id']]['clientid']; // Replace serverid with clientid
					$u['_modifiedtime'] = $u['modifiedtime'];
					$filteredUpdates[] = $u;
					} else if (empty($updatedLookupIds[$u['id']])){
					$u['_id'] = $u['id'];// Rename the id key
					$u['_modifiedtime'] = $u['modifiedtime'];
					unset($u['id']);
					$filteredCreates[] = $u;
				}
			}
		}

		$filteredDeletes = array();
		$clientID2ServerIDMap = array();
		foreach ($deletedIds as $d) {
			if (isset($deletedLookupIds[$d])) {
				$clientId = $deletedLookupIds[$d]['clientid'];
				$filteredDeletes[] = $clientId; // Replace serverid with clientid;
				$clientID2ServerIDMap[$clientId] = $d; // For WSAPP logs
			}
		}

		$result['created'] = $filteredCreates;
		$result['updated'] = $filteredUpdates;
		$result['deleted'] = $filteredDeletes;
		$result['client2serverIdMap'] = $clientID2ServerIDMap;
		return $result;
	}

	/**
	 * Update the missing serverid-clientid map as requested from application
	 */
	function map($key, $element, $user) {
		if (empty($element)) return;
		$db = PearDatabase::getInstance();
		$appid = $this->appid_with_key($key);
		$createDetails = $element["create"];
		$deleteDetails = $element["delete"];
		$updatedDetails = $element["update"];
		$deleteQueueSyncServerIds = array();
		$serverKey = wsapp_getAppKey("vtigerCRM");
		$serverAppId = $this->appid_with_key($serverKey);
		//$lookups = $this->idmap_get_clientmap($appid, array_values($createDetails));
		foreach ($createDetails as $clientid => $serverDetails) {
			$this->idmap_put( $appid, $serverDetails['serverid'], $clientid,$serverDetails['modifiedtime'],$serverDetails['_modifiedtime'],$serverAppId);
		}
		foreach($updatedDetails as $clientid=>$serverDetails){
			$this->idmap_updateMapDetails( $appid, $clientid,$serverDetails['modifiedtime'],$serverDetails['_modifiedtime'],$this->update);
			$syncServerId = $this->getSyncServerId($clientid,$serverDetails['serverid'],$appid);
			if(isset($syncServerId) && $syncServerId != NULL){
				$deleteQueueSyncServerIds[] = $syncServerId;
			}
		}
		if(php7_count($deleteDetails)>0){
			$deleteLookUps = $this->idmap_get_clientservermap($appid, array_values($deleteDetails));
			foreach($deleteDetails as $clientid){
				if(isset($deleteLookUps[$clientid])){
					$serverId = $deleteLookUps[$clientid];
					$syncServerId = $this->getSyncServerId($clientid,$serverId,$appid);
					if(isset($syncServerId) && $syncServerId != NULL){
						$deleteQueueSyncServerIds[] = $syncServerId;
					}
					$this->idmap_delete($appid, $serverId, $clientid,$serverAppId);
				}

			}
		}
		if(php7_count($deleteQueueSyncServerIds)>0){
			$this->deleteQueueRecords($deleteQueueSyncServerIds);
		}
	}

	function getQueueDeleteRecord($appId){
		$db = PearDatabase::getInstance();
		$result = $db->pquery("SELECT * FROM vtiger_wsapp_queuerecords
								INNER JOIN vtiger_wsapp_recordmapping ON (vtiger_wsapp_recordmapping.id=vtiger_wsapp_queuerecords.syncserverid)
								WHERE vtiger_wsapp_recordmapping.appid=? ",array($appId));
		$serverIds = array();
		$num_rows = $db->num_rows($result);
		for($i=0;$i<$num_rows;$i++){
			$serverId = $db->query_result($result,$i,'serverid');
			$serverIds[] = $serverId;
		}
		return $serverIds;
	}

	function convertToQueueRecordFormat($record,$flag){
		if($flag != $this->delete)
				return $record;
		else{
			$recordFormat = array();
			$recordFormat['id'] = $record['id'];
			return $recordFormat;
		}
	}
  /**
  * Retrieve serverid  of record   for the given
  *  client
  */
	function idmap_get_serverId($clientid,$appId){

		$db = PearDatabase::getInstance();

		$result = $db->pquery("SELECT serverid, clientid FROM vtiger_wsapp_recordmapping WHERE  clientid = ? and appid=?", array($clientid,$appId));
		$mapping = array();
		if($db->num_rows($result)){
			while($row = $db->fetch_array($result)){
				return $row['serverid'];
			}
		}
		return false;
	}
  /**
  * Retrieve clientid  of record   for the given
  *  client
  */
	function idmap_get_clientId($serverid,$appId){

		$db = PearDatabase::getInstance();

		$result = $db->pquery("SELECT serverid, clientid FROM vtiger_wsapp_recordmapping WHERE  serverid = ? and appid=?", array($serverid,$appId));
		$mapping = array();
		if($db->num_rows($result)){
			while($row = $db->fetch_array($result)){
				return $row['clientid'];
			}
		}
		return false;
	}
}

?>
