<?php

/**
 * @author vallance
 *
 * Download automaticaly a name plugin.
 */
class PluginDownloader implements \FlowStackInterface {

	const DOWNLOAD_DIRECTORY = "http://cscfa.fr/download/PI1/plugin/";
	
	private $pluginName;
	private $color;
	private $force;

	/**
	 * Constructor.
	 * Default constructor, initialize $color.
	 */
	public function __construct(){
		$this->color = new Colors();
	}

	/**
	 * Control parameters.
	 * Return true if PLUGIN:GET is given and no other option or force option.
	 *
	 * @see FlowStackInterface::control()
	 */
	public function control( $argArray ) {
		
		if(isset($argArray[1]) && strtoupper($argArray[1]) == "PLUGIN:GET"){
			
			if(isset($argArray[2])){
				$this->pluginName = $argArray[2];
			}else{
				return false;
			}
			
			if(isset($argArray[3]) && (strtoupper($argArray[3]) == "-F" || strtoupper($argArray[3]) == "--FORCE")){
				$this->force = true;
			}else if(!isset($argArray[3])){
				$this->force = false;
			}else{
				return false;
			}
			
			return true;
		}else{
			return false;
		}
	}

	/**
	 * @see FlowStackInterface::getControlMethod()
	 */
	public function getControlMethod() {
		return "installPlugin";
	}
	
	/**
	 * Download a plugin.
	 * Download a text formated plugin.
	 * 
	 * @return boolean|string
	 */
	public function downloadPlugin() {
		
		echo $this->color->getColoredString("Start download\n", "green");
		
		$ch = curl_init();
		$timeout = 5;
		curl_setopt($ch, CURLOPT_URL, self::DOWNLOAD_DIRECTORY.$this->pluginName);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
		$data = curl_exec($ch);
		$status = curl_getinfo($ch)["http_code"];
		curl_close($ch);
		
		if($status != 200){
			echo $this->color->getColoredString("Undefined plugin ".$this->pluginName, "red");
			$data = false;
		}
		
		return $data;
		
	}
	
	/**
	 * Install a plugin.
	 * Download and write plugin. If force option is defined, an existing plugin
	 * with same name will be overwrite.
	 */
	public function installPlugin() {
		
		if (($data = $this->downloadPlugin()) !== false) {
			echo $this->color->getColoredString("Download ended\n", "green");
			
			if(is_file(realpath(__DIR__."/../pluginStuff")."/".$this->pluginName.".php") && !$this->force){
				echo "\n";
				echo $this->color->getColoredString("A plugin with this name already exist", "red");
				echo "\n";
			}else{
				if(file_put_contents(realpath(__DIR__."/../pluginStuff")."/".$this->pluginName.".php", $data) !== false){
					echo $this->color->getColoredString("Plugin corectly installed", "green");
					echo "\n";
				}else{
					echo "\n";
					echo $this->color->getColoredString("An error occured during file writing", "red");
					echo "\n";
				}
			}
		}else{
			echo "\n";
			echo $this->color->getColoredString("Download error during transfer from ".self::DOWNLOAD_DIRECTORY.$this->pluginName, "red");
			echo "\n\n";
		}
		
	}

}