<?php
  /**
   * @author Thomas Tanghus
   * Copyright (c) 2013 Thomas Tanghus (thomas@tanghus.net)
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OCA\Contacts;
  
  use OCP\AppFramework\Http\Response;
  
  
  /**
   * A renderer for images
   */
  class ImageResponse extends Response {
  	/**
  	 * @var OCP\Image
  	 */
  	protected $image;
  
  	/**
  	 * @param OCP\Image $image
  	 */
  	public function __construct($image = null) {
  		if(!is_null($image)) {
  			$this->setImage($image);
  		}
  	}
  
  	/**
  	 * @param OCP\Image $image
  	 */
  	public function setImage(\OCP\Image $image) {
  		if(!$image->valid()) {
  			throw new \InvalidArgumentException(__METHOD__. ' The image resource is not valid.');
  		}
  		$this->image = $image;
  		$this->addHeader('Content-Type', $image->mimeType());
  		return $this;
  	}
  
  	/**
  	 * Return the image data stream
  	 * @return Image data
  	 */
  	public function render() {
  		if(is_null($this->image)) {
  			throw new \BadMethodCallException(__METHOD__. ' Image must be set either in constructor or with setImage()');
  		}
  		return $this->image->data();
  	}
  
  }