<?php
/*
Author: 		Riccardo Di Dato
Creation Date:	23/dic/2015
*/

abstract class DaoSaveableDefaultImplementation implements DaoSaveable, Serializable {
	protected $saveableObject;
	
	
	public function __construct($saveableObject = null){
		if (is_null($saveableObject)){
			$saveableObject = new stdClass();
		}
		else {
			$this->updateFromSaveableObj($saveableObject);
		}
	}
	
	public function __set($attr,$value){
		if (strcmp($attr,"id")==0 || strcmp($attr,"_id")==0){
			if (strcmp($attr,"id")==0){
				$attr = "_id";
			}
			if (!($value instanceof MongoDB\BSON\ObjectID)){
				$value = new MongoDB\BSON\ObjectID($value);
			}
		}
		$this->saveableObject->$attr = $value;
	}
	
	public function &__get($attr){
		$rval = null;
		if (strcmp($attr,"id")==0){
			$attr = '_id';
		}
		if ($this->hasProperty($attr)){
			$rval = &$this->saveableObject->$attr;
		}
		if (strcmp($attr,"_id")==0){
			$rval = strval($rval);
		}
		
		return $rval;
	}
	
	public function __unset($attr){
		unset($this->saveableObject->$attr);
	}
	
	public function hasProperty($attr){
		if (strcmp($attr,"id")==0){
			$attr = "_id";
		}
		return property_exists($this->saveableObject, $attr);
	}
	
	/**
	 * (non-PHPdoc)
	 * @see DaoSaveable::getSaveableObj()
	 */
	public function getSaveableObj(){
// 		return $this->saveableObject;
		return $this->toArray($this->saveableObject);
	}
	
	private function toArray($input){
		$rval = $input;
		if (is_object($rval) ){
// 			if (!($rval instanceof MongoId) && !($rval instanceof MongoDate) ){
			if (!($rval instanceof MongoDB\BSON\ObjectID) && !($rval instanceof MongoDB\BSON\UTCDateTime) ){
				$rval = (array)$input;
			}
// 			$rval = (array)$input;
		}
	
		if (is_array($rval)) {
			foreach ( $rval as $key=>$val){
				$rval[$key] = $this->toArray($val);
			}
		}
	
		return $rval;
	}
	
	/**
	 * (non-PHPdoc)
	 * @see DaoSaveable::buildFromSaveableObj()
	 */
	public static function buildFromSaveableObj($saveableObject){
		return new static($saveableObject);
	}
	
	/**
	 * (non-PHPdoc)
	 * @see DaoSaveable::updateFromSaveableObj()
	 */
	public function updateFromSaveableObj($saveableObject){
		$this->saveableObject = $this->toObject($saveableObject);
		if (!property_exists($this->saveableObject, "deleted")){
			$this->saveableObject->deleted = false;
		}
// 		$this->saveableObject = $saveableObject;
	}
	
	private function toObject($input){
		$rval = $input;
		if (is_array($input) && sizeof(array_diff_key($input,array_keys($input)))>0 ){
			$rval = (object)$input;
		}
		
		if (is_array($rval)){
			foreach ( $rval as $key=>$val){
				$rval[$key] = $this->toObject($val);
			}
		}
		else if (is_object($rval)) {
// 			if (!($rval instanceof MongoId) && !($rval instanceof MongoDate)){
			if (!($rval instanceof MongoDB\BSON\ObjectID) && !($rval instanceof MongoDB\BSON\UTCDateTime) ){
				foreach ( $rval as $key=>$val){
					$rval->$key = $this->toObject($val);
				}
			}
		}
		
		return $rval;
	}
	
	private function toArrayAndScalars($obj){
		$rval = $obj;
		
		if ( ( $rval instanceof MongoDB\BSON\ObjectID ) || ( $rval instanceof MongoDB\BSON\UTCDateTime ) ){
			$rval = [
					'__fetch' => get_class($rval),
					'value' => strval($rval)
			];
		}
		else if ( is_object( $rval ) ){
			$rval = (array)($rval);
		}
		
		if ( is_array($rval) ) {
			foreach ( $rval as $key=>$val ) {
				if (!is_scalar($val)){
					$rval[$key] = $this->toArrayAndScalars($val);
				}
			}
		}
		
		return $rval;
	}
	
	private function fromArrayAndScalars($obj){
		$rval = $obj;
		
		if (is_array($obj)){
			if (array_key_exists("__fetch", $rval) && array_key_exists("value", $rval) ){
				$class = $rval["__fetch"];
				$val = $rval["value"];
				$rval = new $class($val);
			}
			else {
				foreach ($rval as $key=>$value){
					$rval[$key] = $this->fromArrayAndScalars($value);
				}
			}
		}
	
		return $rval;
	}
	
	public function serialize(){
		return json_encode( $this->toArrayAndScalars( $this->saveableObject ) );
	}
	
	public function unserialize($serialized){
		$this->updateFromSaveableObj( $this->fromArrayAndScalars( json_decode( $serialized, true ) ) );
	}
	
}

?>