<?php

/**
* Manage application and plugins configurations with key/value pair
* 
* **nb:** It's possible to specify namespace in order to distinct global configuration to plugin custom configuration
* @author valentin carruesco
* @category Core
* @license copyright
*/

class Configuration extends Entity{

	protected $id,$key,$value,$confTab;
	protected $fields = 
	array(
		'id'=>'key',
		'key'=>'longstring',
		'value'=>'longstring'
	);


	/**
	* Get all configurations from database OR session if it was yet loaded
	* This function is called at start of program and global var '$conf' is filled with response, so use global $conf instead of call this function.
	* #### Example
	* ```php
	* $confs = Configuration::getAll();
	* var_dump($confs);
	* ```
	* @return array Array of configurations
	*/

	public function getAll(){
		
		if(!isset($_SESSION['configuration'])){
	
		$configurationManager = new Configuration();
		$configs = $configurationManager->populate();
		$confTab = array();

		foreach($configs as $config){
			$this->confTab[$config->getKey()] = Functions::decrypt($config->getValue());
		}

		$_SESSION['configuration'] = serialize($this->confTab);
		
		}else{
			$this->confTab = unserialize($_SESSION['configuration']);

		}
		
	}


	/**
	* Get configuration value from it key
	* #### Example
	* ```php
	* global $conf; // global var, contain configurations
	* echo $conf->get('myConfigKey'); // print myConfigKey value
	* ```
	* @param string configuration key
	* @param string configuration namespace (default is 'conf')
	* @return string valeur de la configuration
	*/
	public function get($key){

		return (isset($this->confTab[$key])?$this->confTab[$key]:'');
	}

	/**
	* Update or insert configuration value in database with specified key
	* #### Example
	* ```php
	* global $conf; // global var, contain configurations
	* echo $conf->put('myNewConfigKey','hello!'); //create configuration myNewConfigKey with value 'hello!'
	* echo $conf->put('myNewConfigKey','hello 2!'); //update configuration myNewConfigKey with value 'hello2!'
	* ```
	* @param string configuration key
	* @param string configuration value
	* @param string configuration namespace (default is 'conf')
	*/
	public function put($key,$value){
		$secured_value = Functions::crypt($value);
		$configurationManager = new Configuration();
		if (isset($this->confTab[$key])){
			$configurationManager->change(array('value'=>$secured_value),array('key'=>$key));
		} else {
			$configurationManager->add($key,$secured_value);	
		}
		$this->confTab[$key] = $value;
		unset($_SESSION['configuration']);
	}

	/**
	* Remove configuration value in database with specified key
	* #### Example
	* ```php
	* global $conf; // global var, contain configurations
	* echo $conf->remove('myNewConfigKey'); //delete myNewConfigKey from 'conf' default namespace 
	* echo $conf->remove('myNewConfigKey','myCustomPluginConfig'); //delete myNewConfigKey from 'myCustomPluginConfig' namespace
	* ```
	* @param string configuration key
	* @param string configuration namespace (default is 'conf')
	*/
	public function add($key,$value){
		$config = new Configuration();
		$config->setKey($key);
		$config->setValue($value);
		$config->save();
		$this->confTab[$key] = $value;
		unset($_SESSION['configuration']);
	}
	
	
	function getId(){
		return $this->id;
	}

	function getKey(){
		return $this->key;
	}

	function setKey($key){
		$this->key = $key;
	}

	function getValue(){
		return $this->value;
	}

	function setValue($value){
		$this->value = $value;
	}


}

?>