<?php
// Datenbank-Verbindungsparameter
require_once ('dbutils.php');
require_once ('queuecontent.php');
require_once ('commonutils.php');
require_once ('utilities/userrights.php');
require_once ('utilities/HistFiller.php');

class Products {
	var $dbutils;
	var $queue;
	var $commonUtils;
	var $userrights;
	var $histfiller;
	
	function __construct() {
		$this->dbutils = new DbUtils();
		$this->queue = new QueueContent();
		$this->commonUtils = new CommonUtils();
		$this->userrights = new Userrights();
		$this->histfiller = new HistFiller();
	}

	function handleCommand($command) {		
		// canUserCallCommands($currentCmd, $cmdArray,$right)
		$cmdArray = array('showDbProducts', 'applySingleProdData', 'reassign', 'applyType', 'getSingleProdData','getPriceLevelInfo','setPriceLevelInfo', 'createProduct','createProdType');
		if (in_array($command, $cmdArray)) {
			if (!($this->userrights->hasCurrentUserRight('right_products'))) {
				if ($command == 'createProdType') {
					echo json_encode(array("status" => "ERROR", "code" => ERROR_PRODUCTS_NOT_AUTHOTRIZED, "msg" => ERROR_PRODUCTS_NOT_AUTHOTRIZED_MSG));
				} else {
					echo "Benutzerrechte nicht ausreichend!";
				}
				return false;
			}
		}
		
		if($command == 'showDbProducts') {
			$this->showDbProducts();
		} else if ($command == 'getSpeisekarte') {
			if ($this->userrights->hasCurrentUserRight('is_admin') || ($this->userrights->hasCurrentUserRight('right_manager'))) {
				$this->getSpeisekarte();
			} else {
				echo "Fehlende Benutzerechte";
			}
		} else if ($command == 'exportCsv') {
			if (($this->userrights->hasCurrentUserRight('is_admin')) 
					|| ($this->userrights->hasCurrentUserRight('right_manager'))) {
				$this->exportCsv();
			}
		} else if ($command == 'getAllTypesAndAvailProds') {
			$this->getAllTypesAndAvailProds();
		} else if ($command == 'getAllAvailProdsAlphaSorted') {
			$this->getAllAvailProdsAlphaSorted();
		} else if ($command == 'getSingleProdData') {
			$this->getSingleProdData($_GET['id']);
		} else if ($command == 'applySingleProdData') {
			$this->applySingleProdData($_POST['id'],$_POST['longname'],$_POST['shortname'],$_POST['priceA'],$_POST['priceB'],$_POST['priceC'],$_POST['available'],$_POST['audioFile']);
		} else if ($command == 'createProduct') {
			$this->createProduct($_POST['longname'],$_POST['shortname'],$_POST['priceA'],$_POST['priceB'],$_POST['priceC'],$_POST['available'],$_POST['prodTypeId'],$_POST['audioFile']);
		} else if ($command == 'reassign') {
			$this->reassign($_POST['productid'],$_POST['typeid']);
		} else if ($command == 'createProdType') {
			$this->createProdType($_POST['refid'],$_POST['name']);
		} else if ($command == 'applyType') {
			$this->applyType($_POST['id'],$_POST['name'],$_POST['kind'],$_POST['usekitchen'],$_POST['usesupply']);
		} else if ($command == 'getPriceLevelInfo') {
			$this->getPriceLevelInfo();
		} else if ($command == 'setPriceLevelInfo') {
			$this->setPriceLevelInfo($_POST['priceLevelId']);
		} else if ($command == 'getSpeisekarte') {
			$this->getSpeisekarte();
		} else if ($command == 'getAudioFiles') {
			$this->getAudioFiles();
		} else {
			echo "Command not supported.";
		}
	}
	
	function getDateValueAsBoolInterpretatedIcon($aValue) {
		if ($aValue != '0' ) {
			$imgFile = "ok.png";
		} else {
			$imgFile = "notavailable.png";
		}
		return $imgFile;
	}
	
	private function getAllTypesAndAvailProds() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		$sql = "select id,name,reference from %prodtype% where removed is null";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$typeArray = array();
		
		foreach($result as $row) {
			$ref = $row['reference'];
			if ($ref == null) {
				$ref = 0;
			}
			$typeArray[] = array("id" => $row['id'], "name" => $row['name'], "ref" => $ref);
		}
		
		$sql = "select id,shortname,longname,audio,category as ref from %products% where available='1' AND removed is null";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$prodArray = array();
		foreach($result as $row) {
			$ref = $row['ref'];
			if ($ref == null) {
				$ref = 0;
			}
			$audio = $row['audio'];
			if ($audio == null) {
				$audio = "";
			}
			$prodArray[] = array("id" => $row['id'], "name" => $row['shortname'], "longname" => $row['longname'], "audio" => $audio, "ref" => $ref);
		}
		$pdo->commit();
		
		$retArray = array("types" => $typeArray, "prods" => $prodArray);
		echo json_encode($retArray);
	}
	
	/*
	 * Return all available product with id and name that are not in given type.
	 * (used for re-assignment to type)
	 */
	function getAllAvailProdsAlphaSorted() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		// find categories with available products in them
		$sql = "select distinct category from %products% WHERE available='1' AND removed is null";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		$typeArr = array();
		foreach($result as $row) {
			$cat = $row['category'];
			
			// find all prods not in this array (for later re-assignment into this cat)
			$sql = "select id,longname from %products% WHERE available='1' AND removed is null AND category <> ? ORDER BY longname";
			$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
			$stmt->execute(array($cat));
			$prodresult = $stmt->fetchAll();
			$prodArray = array();
			foreach($prodresult as $prow) {
				$prodArray[] = array("id" => $prow['id'], "name" => $prow['longname']);
			}
			$typeArr[] = array("type" => $cat, "prods" => $prodArray);
		}
		
		echo json_encode($typeArr);
	}
	
	// ************************************************************
	// *   Start OLD part
	// ************************************************************
	
	// Utility function: find the roomid if the tableid is known
	function getRoomFromTableid($tableid) {
		// Find roomid for table (variable roomid works in the one direction, but if called by back-button, not)
		$sql = "select " . DB_ROOM_TABLE . ".id as id from " . DB_ROOM_TABLE . ", " . DB_RESTTABLES_TABLE . " where " . DB_RESTTABLES_TABLE . ".id = '" . $tableid . "' and " . DB_ROOM_TABLE . ".id = " . DB_RESTTABLES_TABLE . ".roomid;";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC);
		$roomid = $zeile['id'];
		mysqli_free_result( $dbresult );
		return $roomid;
	}
	
	function areThereProductsInTheCategory($categoryid) {
		$sql = "SELECT id FROM " . DB_PRODUCTS_TABLE . " WHERE category = " . $categoryid . " AND available='1';";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$numberOfEnttry = mysqli_num_rows($dbresult);
		mysqli_free_result( $dbresult );
		if ($numberOfEnttry > 0) {
			return true;
		} else {
			return false;
		}
	}

	function areThereCategoriesInTheCategory($categoryid) {
		$sql = "SELECT id FROM %prodtype% WHERE removed is null AND reference = $categoryid";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$numberOfEntry = mysqli_num_rows($dbresult);
		mysqli_free_result( $dbresult );
		if ($numberOfEntry > 0) {
			return true;
		} else {
			return false;
		}
	}
	
	/*
	 * Return in array all products with their id and longname that have a reference to
	 * the given category.
	 * 
	 * The output is this:
	 * 		["id" => 1, "longname" => "Whatever Product"],
	 * 		["id" => 2, "longname" => "Whatever Other Product"], ...
	 */
	private function getProductsWithReferenz($ref) {
		$prods = array();
		$sql = "SELECT id,shortname,longname,priceA,priceB,priceC,available,audio from %products% where removed is null AND category is null";
		if ($ref > 0) {
			$sql = "SELECT id,shortname,longname,priceA,priceB,priceC,available,audio from %products% where removed is null AND category=$ref";
		}
		$dbresult = $this->dbutils->performSqlCommand($sql);
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$prod_entry = array(
					"id" => $zeile['id'],
					"shortname" => $zeile['shortname'],
					"longname" => $zeile['longname'],
					"available" => $zeile['available'],
					"priceA" => $zeile['priceA'],
					"priceB" => $zeile['priceB'],
					"priceC" => $zeile['priceC'],
					"audio" => ($zeile['audio'] == null ? '' : $zeile['audio']),
					"type" => "p");
			$prods[] = $prod_entry;
		}
		mysqli_free_result( $dbresult );
		return $prods;
	}
	
	/*
	 * Return in array all types with their id and name that have a reference to
	* the given category.
	*
	* The output is this:
	* 		["id" => 1, "name" => "Meal"],
	* 		["id" => 2, "name" => "Drinks"], ...
	*/
	private function getProdTypesWithReferenz($ref) {
		$types = array();
		$sql = "SELECT id,name,kind,usekitchen,usesupplydesk from %prodtype% where removed is null AND reference is null";
		if ($ref > 0) {
			$sql = "SELECT id,name,kind,usekitchen,usesupplydesk from %prodtype% where removed is null AND reference=$ref";
		}
		$dbresult = $this->dbutils->performSqlCommand($sql);
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$prod_entry = array(
					"id" => $zeile['id'],
					"name" => $zeile['name'],
					"kind" => $zeile['kind'],
					"usekitchen" => $zeile['usekitchen'],
					"usesupplydesk" => $zeile['usesupplydesk'],
					"type" => "t");
			$types[] = $prod_entry;
		}
		mysqli_free_result( $dbresult );
		return $types;
	}
	
	function showDbProducts() {
		$productArray = $this->getDbProductsWithRef_json_version(0,0);
		echo json_encode($productArray);
	}
	
	function readDbProducts() {
		$speisekarte = $this->readDbProductsWithRef_json_version(0,0);
		return $speisekarte;
	}
	
	private function exportCsv() {
		$file_name = "datenexport-produkte.csv";
		header("Content-type: text/x-csv");
		header("Content-Disposition: attachment; filename=$file_name");
		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		header("Pragma: no-cache");
		header("Expires: 0");
		echo("Eintragsid; Datum ; Produktid; Kurzname; Langname; Preis (Stufe A); Preis (Stufe B);");
		echo("Preis (Stufe C); Verfügbarkeit; Beschreibung");
		echo("\n");
		
		$sql = "SELECT DISTINCT %hist%.id as id,date,";
		$sql .= "prodid,shortname,longname,priceA,priceB,priceC,available, description ";
		$sql .= " FROM %hist%, %histprod%, %histactions% ";
		$sql .= " WHERE (refid=%histprod%.id) ";
		$sql .= " AND (action='1' OR action='4' OR action='5') ";
		$sql .= " AND (action=%histactions%.id) ";
		$sql .= " ORDER BY date,id";
		
		$dbresult = $this->dbutils->performSqlCommand($sql);
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$val1 = $zeile['id'];
			$val2 = $zeile['date'];
			$val3 = $zeile['prodid'];
			$val4 = str_replace('"','""',$zeile['shortname']);
			$val5 = str_replace('"','""',$zeile['longname']);
			$val6 = $zeile['priceA'];
			$val7 = $zeile['priceB'];
			$val8 = $zeile['priceC'];
			$val9 = ($zeile['available'] == '1' ? "Ja" : "Nein");
			$val10 = $zeile['description'];

			echo "$val1; $val2; $val3; \"$val4\"; \"$val5\"; $val6; $val7; $val8; $val9; $val10\n";
		}
		mysqli_free_result( $dbresult );
	}
	
	function getSingleProdData($id) {
		if (is_numeric($id)) {
			$sql = "SELECT shortname,longname,priceA,priceB,priceC,available,audio from %products% where id=$id";
			$dbresult = $this->dbutils->performSqlCommand($sql);
			$zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC);
			
			$prod_entry = array(
					"shortname" => $zeile['shortname'],
					"longname" => $zeile['longname'],
					"available" => $zeile['available'],
					"priceA" => $zeile['priceA'],
					"priceB" => $zeile['priceB'],
					"priceC" => $zeile['priceC'],
					"audio" => $zeile['audio']
					);
			
			mysqli_free_result( $dbresult );
			echo json_encode($prod_entry);
		}
	}
	
	function reassign($prodid,$typeid) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		$sql = "UPDATE %products% SET category=? WHERE id=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($typeid,$prodid));
		$affectedRows = $stmt->rowCount();
		$pdo->commit();
		if ($affectedRows == 1) {
			echo json_encode("OK");
		} else {
			echo json_encode("Failed");
		}
	}
	
	function applySingleProdData($id,$longname,$shortname,$priceA,$priceB,$priceC,$available,$audioFile) {
		if (!is_numeric($id) || !is_numeric($available) || !is_numeric($priceA) || !is_numeric($priceB) || !is_numeric($priceC)) {
			return;
		}
		$priceA = $this->dbutils->filterString($priceA);
		$priceB = $this->dbutils->filterString($priceB);
		$priceC = $this->dbutils->filterString($priceC);
		
		if ($audioFile == '') {
			$audioFile = null;
		}
		$updateSql = "UPDATE %products% SET shortname=?, longname=?, priceA=?, priceB=?, priceC=?, available=?, audio=? WHERE id=?";
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($updateSql));
		$stmt->execute(array($shortname,$longname,$priceA,$priceB,$priceC,$available,$audioFile,$id));
		
		$pdo->commit();

		echo json_encode("OK: $updateSql");
		
		// now this has to be logged in the history tables...
		$this->histfiller->updateProdInHist($id, $shortname, $longname, $priceA, $priceB, $priceC, 
				NULL, $available,$audioFile);
	}

	function createProdType($id,$prodTypeName) {
		if (!is_numeric($id)) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_ID_TYPE, "msg" => ERROR_GENERAL_ID_TYPE_MSG));
			return;
		}
		  
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();
		
		// which kind is the referenced type?
		$sql = "SELECT kind FROM %prodtype% WHERE id=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($id));
		$row =$stmt->fetchObject();
		
		if ($row == null) {
			echo json_encode(array("status" => "ERROR", "code" => ERROR_GENERAL_DB_NOT_READABLE, "msg" => ERROR_GENERAL_DB_NOT_READABLE_MSG));
			return;
		}
		$kind = $row->kind;
		
		$sql = "INSERT INTO `%prodtype%` (`id`,`name`,`usekitchen`,`usesupplydesk`,`kind`,`sorting`,`reference`) ";
		$sql .= " VALUES(NULL,?,1,1,?,NULL,?)";
		
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($prodTypeName,$kind,$id));
		
		$pdo->commit();
		echo json_encode(array("status" => "OK"));
	}
	
	function createProduct($longname,$shortname,$priceA,$priceB,$priceC,$available,$typeId,$audioFile) {
		if (!is_numeric($typeId) || !is_numeric($available) || !is_numeric($priceA) || !is_numeric($priceB) || !is_numeric($priceC)) {
			return;
		}

		if ($audioFile == '') {
			$audioFile = null;
		}
		
		$sql = "INSERT INTO `%products%` (`id`, `shortname`, `longname`,  `priceA`,  `priceB`,  `priceC`, `category`,`available`,`audio`) VALUES (NULL,?,?,?,?,?,?,?,?)";
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$pdo->beginTransaction();

		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($shortname,$longname,$priceA,$priceB,$priceC,$typeId,$available,$audioFile));
		
		$newProdId = $pdo->lastInsertId();
		$pdo->commit();
		
		// now this has to be logged in the history tables...
		
		$this->histfiller->createProdInHist ($newProdId['id'], $shortname, $longname, $priceA, $priceB, $priceC,
				NULL, $available,$audioFile);

		echo json_encode("OK: sql");
	}
	
	/*
	 * Change the properties of a type of products
	 */
	function applyType($id,$name,$kind,$usekitchen,$usesupply) {
		if (!is_numeric($id) || !is_numeric($kind) || !is_numeric($usekitchen) || !is_numeric($usesupply)) {
			return;
		}
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$updateSql = "UPDATE %prodtype% SET kind=?, name=?, usekitchen=?, usesupplydesk=? WHERE id=?";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($updateSql));
		$stmt->execute(array($kind,$name,$usekitchen,$usesupply,$id));
		echo json_encode("OK: $updateSql");
	}
	
	
	/* 
	 * Return a html table with all products in a structured way
	 */
	private function getDbProductsWithRef_json_version($ref,$depth) {
		$allProdsAndTypesInThisLevel = array();
	
		$allProdsInThisLevel = $this->getProductsWithReferenz($ref);
		$allTypesInThisLevel = $this->getProdTypesWithReferenz($ref);
		
 		for ($index_prod=0;$index_prod<count($allProdsInThisLevel);$index_prod++) {
 			$aProd = $allProdsInThisLevel[$index_prod];
 			$allProdsAndTypesInThisLevel[] = array("entry" => $aProd, "content" => '');
 		}
		for ($index_type=0;$index_type < count($allTypesInThisLevel);$index_type++) {
			$aProdType = $allTypesInThisLevel[$index_type];
			$typeRef = $aProdType['id'];
			$allProdsAndTypesInThisLevel[] = array("entry" => $aProdType,"content" => $this->getDbProductsWithRef_json_version($typeRef,$depth+1));
		}
		return $allProdsAndTypesInThisLevel;
	}
	
	// return in text format
	private function readDbProductsWithRef_json_version($ref,$depth) {
		$text = "";
		$allProdsAndTypesInThisLevel = array();
	
		$allProdsInThisLevel = $this->getProductsWithReferenz($ref);
		$allTypesInThisLevel = $this->getProdTypesWithReferenz($ref);
	
		for ($index_prod=0;$index_prod<count($allProdsInThisLevel);$index_prod++) {
			$aProd = $allProdsInThisLevel[$index_prod];
			
			// Kurzname ; NormalPreis (Stufe A); Langname # Preis (Stufe B); Preis (Stufe C)
			$shortname = $aProd['shortname'];
			$longname = $aProd['longname'];
			$available = $aProd['available'];
			$priceA = $aProd['priceA'];
			$priceB = $aProd['priceB'];
			$priceC = $aProd['priceC'];
			
			$prodText = "$shortname ; $priceA ; $longname # $priceB ; $priceC";
			$text .= substr ( "                               " , 0 ,$depth) .  $prodText . "\n";
		}
		
		for ($index_type=0;$index_type < count($allTypesInThisLevel);$index_type++) {
			$aProdType = $allTypesInThisLevel[$index_type];
			$typeRef = $aProdType['id'];
			
			$indent = substr ( "                                " , 0 ,$depth);
			
			$prod_entry = array(
					"id" => $zeile['id'],
					"name" => $zeile['name'],
					"kind" => $zeile['kind'],
					"usekitchen" => $zeile['usekitchen'],
					"usesupplydesk" => $zeile['usesupplydesk'],
					"type" => "t");
			
			$prodTypeName = $aProdType['name'];
			$kind = ($aProdType['kind'] == 0 ? "F" : "D");
			$usekitchen = ($aProdType['usekitchen'] == 1 ? "K" : "");
			$usesupplydesk = ($aProdType['usesupplydesk'] == 1 ? "B" : "");
			
			$text .= $indent . $prodTypeName . " = $usekitchen$usesupplydesk$kind\n";
			
			$text .= $this->readDbProductsWithRef_json_version($typeRef,$depth+1);
		}
		return $text;
	}
	
	private function numberOfProdsInProdType($theId) {
		// how many prods are related to this type?
		$sql = "SELECT COUNT(id) FROM %products% WHERE removed is null AND category=$theId";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		$zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC);
		$noProdsInThisProdType = $zeile['COUNT(id)'];
		mysqli_free_result( $dbresult );
		
		// iterate over all prodtypes in this prodtype
		$prodtypesInside = $this->getProdTypesWithReferenz($theId);
		for ($i=0;$i < count($prodtypesInside);$i++) {
			$anInsideProdType = $prodtypesInside[i];
			// recursive
			$noProdsInThisProdType += $this->numberOfProdsInProdType($anInsideProdType["id"]);
		}
		return $noProdsInThisProdType;
	}
	
	private function getPriceLevelInfo() {
		$currentPriceLevel = $this->commonUtils->getCurrentPriceLevel();
		$currentPriceLevelId = $currentPriceLevel["id"];
		$currentPriceLevelName = $currentPriceLevel["name"];
		
		$pricelevels = array();
		$sql = "SELECT * FROM %pricelevel%";
		$dbresult = $this->dbutils->performSqlCommand($sql);
		while ($zeile = mysqli_fetch_array( $dbresult, MYSQL_ASSOC)) {
			$theId = $zeile['id'];
			$selected = "0";
			if ($theId == $currentPriceLevelId) {
				$selected = "1";
			}
			$levels_entry = array(
					"id" => $theId,
					"name" => $zeile['name'],
					"info" => $zeile['info'],
					"selected" => $selected);
			$pricelevels[] = $levels_entry;
		}
		mysqli_free_result( $dbresult );
		
		$retArray = array("currentId" => $currentPriceLevelId, "currentName" => $currentPriceLevelName, "levels" => $pricelevels);
		echo json_encode($retArray);
	}
	
	private function setPriceLevelInfo($levelId) {
		if (is_numeric($levelId)) {
			$updateSql = "UPDATE %config% SET setting=$levelId WHERE name='pricelevel'";
			$dbresult = $this->dbutils->performSqlCommand($updateSql);
			echo json_encode("OK");
		}
	}
	
	private function getSpeisekarte() {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		
		$sql = "SELECT * FROM %products% WHERE removed is null";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$numberOfProds = $stmt->rowCount();
		
		$sql = "SELECT * FROM %prodtype% WHERE removed is null";
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute();
		$numberOfProdTypes = $stmt->rowCount();
		
		if (($numberOfProds == 0) && ($numberOfProdTypes == 0)) {
			// no products defined yet - present Beispiel
			$text = file_get_contents ("../customer/speisekarte.txt");
		} else {
			$text = $this->readDbProducts();
		}
		
		echo json_encode($text);
	}
	
	private function endsWith($haystack, $needle)
	{
		return $needle === "" || substr($haystack, -strlen($needle)) === $needle;
	}
	
	private function getAudioFiles() {
		$dir    = '../customer';
		$fileList = scandir($dir);
		$audioFiles = array();
		
		foreach ($fileList as $aFile) {
			if ($this->endsWith($aFile, '.mp3') || $this->endsWith($aFile, '.ogg') || $this->endsWith($aFile, '.wav')) {
				$audioFiles[] = $aFile;
			}
		}

		echo json_encode($audioFiles);
	}
}

?>