* switch to composer for qrcode and otp dependencies

* move most OTP-related stuff into userhelper
* remove old phpqrcode and otphp libraries

vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php

@@ -0,0 +1,172 @@
+<?php
+/**
+ * Class SettingsContainerAbstract
+ *
+ * @filesource   SettingsContainerAbstract.php
+ * @created      28.08.2018
+ * @package      chillerlan\Settings
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2018 Smiley
+ * @license      MIT
+ */
+
+namespace chillerlan\Settings;
+
+use Exception, ReflectionClass, ReflectionProperty;
+
+use function call_user_func, call_user_func_array, get_object_vars, json_decode, json_encode, method_exists, property_exists;
+
+abstract class SettingsContainerAbstract implements SettingsContainerInterface{
+
+	/**
+	 * SettingsContainerAbstract constructor.
+	 *
+	 * @param iterable|null $properties
+	 */
+	public function __construct(iterable $properties = null){
+
+		if(!empty($properties)){
+			$this->fromIterable($properties);
+		}
+
+		$this->construct();
+	}
+
+	/**
+	 * calls a method with trait name as replacement constructor for each used trait
+	 * (remember pre-php5 classname constructors? yeah, basically this.)
+	 *
+	 * @return void
+	 */
+	protected function construct():void{
+		$traits = (new ReflectionClass($this))->getTraits();
+
+		foreach($traits as $trait){
+			$method = $trait->getShortName();
+
+			if(method_exists($this, $method)){
+				call_user_func([$this, $method]);
+			}
+		}
+
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function __get(string $property){
+
+		if(property_exists($this, $property) && !$this->isPrivate($property)){
+
+			if(method_exists($this, 'get_'.$property)){
+				return call_user_func([$this, 'get_'.$property]);
+			}
+
+			return $this->{$property};
+		}
+
+		return null;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function __set(string $property, $value):void{
+
+		if(!property_exists($this, $property) || $this->isPrivate($property)){
+			return;
+		}
+
+		if(method_exists($this, 'set_'.$property)){
+			call_user_func_array([$this, 'set_'.$property], [$value]);
+
+			return;
+		}
+
+		$this->{$property} = $value;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function __isset(string $property):bool{
+		return isset($this->{$property}) && !$this->isPrivate($property);
+	}
+
+	/**
+	 * @internal Checks if a property is private
+	 *
+	 * @param string $property
+	 *
+	 * @return bool
+	 */
+	protected function isPrivate(string $property):bool{
+		return (new ReflectionProperty($this, $property))->isPrivate();
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function __unset(string $property):void{
+
+		if($this->__isset($property)){
+			unset($this->{$property});
+		}
+
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function __toString():string{
+		return $this->toJSON();
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function toArray():array{
+		return get_object_vars($this);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function fromIterable(iterable $properties):SettingsContainerInterface{
+
+		foreach($properties as $key => $value){
+			$this->__set($key, $value);
+		}
+
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function toJSON(int $jsonOptions = null):string{
+		return json_encode($this, $jsonOptions ?? 0);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function fromJSON(string $json):SettingsContainerInterface{
+
+		$data = json_decode($json, true); // as of PHP 7.3: JSON_THROW_ON_ERROR
+
+		if($data === false || $data === null){
+			throw new Exception('error while decoding JSON');
+		}
+
+		return $this->fromIterable($data);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function jsonSerialize(){
+		return $this->toArray();
+	}
+
+}