<?php

/* --------------------------------------------------------------------

  Chevereto
  http://chevereto.com/

  @author	Rodolfo Berrios A. <http://rodolfoberrios.com/>
			<inbox@rodolfoberrios.com>

  Copyright (C) Rodolfo Berrios A. All rights reserved.
  
  BY USING THIS SOFTWARE YOU DECLARE TO ACCEPT THE CHEVERETO EULA
  http://chevereto.com/license

  --------------------------------------------------------------------- */

  /* API v1 : PLEASE NOTE
	 
	 This API v1 is currently just a bridge to port to Chevereto 3 the API from Chevereto 2.
	 From now on Chevereto 2 API will be named API v1
	 
	 In future releases there will be an API v2 which will add methods like create user, create albums, etc.
	 
  */
  
$route = function($handler) {
	try {
		$version = $handler->request[0];
		$action = $handler->request[1];
		
		if(is_null(CHV\getSetting('api_v1_key')) or CHV\getSetting('api_v1_key') == '') {
			throw new Exception("API v1 key can't be null. Go to your dashboard and set the API v1 key.", 0);
		}
		
		// Change CHV\getSetting('api_v1_key') to 'something' if you want to use 'something' as key
		if(!G\timing_safe_compare(CHV\getSetting('api_v1_key'), $_REQUEST['key'])) {
			throw new Exception("Invalid API v1 key.", 100);
		}
		
		if(!in_array($version, [1])) {
			throw new Exception('Invalid API version.', 110);
		}
		
		$version_to_actions = [
			1 => ['upload']
		];
		
		if(!in_array($action, $version_to_actions[$version])) {
			throw new Exception('Invalid API action.', 120);
		}
		
		// API V1 upload
		$source = isset($_FILES['source']) ? $_FILES['source'] : $_REQUEST['source'];
		
		if(is_null($source)) {
			throw new Exception('Empty upload source.', 130);
		}

		if($_FILES['source']['tmp_name']) { // File?
			$source = $_FILES['source'];
			$type = 'file';
		} else {
			if(!G\is_image_url($source) && !G\is_url($source)) {
			
				// Base64 comes from POST?
				if($_SERVER['REQUEST_METHOD'] !== 'POST') {
					throw new Exception('Upload using base64 source must be done using POST method.', 130);
				}
				
				// Fix the $source base64 string
				$source = trim(preg_replace('/\s+/', '', $source));
				
				// From _GET source should be urlencoded base64
				if(!G\timing_safe_compare(base64_encode(base64_decode($source)), $source)){
					throw new Exception('Invalid base64 string.', 120);
				}
				
				// Set the API temp file		
				$api_temp_file = @tempnam(sys_get_temp_dir(), 'chvtemp');
				
				if(!$api_temp_file or !@is_writable($api_temp_file)) {
					throw new UploadException("Can't get a tempnam.", 200);
				}
					
				$fh = fopen($api_temp_file, 'w');
				stream_filter_append($fh, 'convert.base64-decode', STREAM_FILTER_WRITE);
				if(!@fwrite($fh, $source)) {
					throw new Exception('Invalid base64 string.', 130);
				} else {
					// Since all the validations works with $_FILES, we're going to emulate it.
					$source = array(
						'name'		=> G\random_string(12).'.jpg',
						'type'		=> 'image/jpeg',
						'tmp_name'	=> $api_temp_file,
						'error'		=> 'UPLOAD_ERR_OK',
						'size'		=> '1'
					);
				}
				fclose($fh);
			}
		}
		
		// CHV\Image::uploadToWebsite($source, 'username', [params]) to inject API uploads to a given username
		$uploaded_id = CHV\Image::uploadToWebsite($source); 
		$json_array['status_code'] = 200;
		$json_array['success'] = array('message' => 'image uploaded', 'code' => 200);
		$json_array['image'] = CHV\Image::formatArray(CHV\Image::getSingle($uploaded_id, false, false), true);
		
		if($version == 1) {
			switch($_REQUEST['format']) {
				default:
				case 'json':
					G\Render\json_output($json_array);
				break;
				case 'txt':
					echo $json_array['image']['url'];
				break;
				case 'redirect':
					if($json_array['status_code'] == 200) {
						$redirect_url = $json_array['image']['url_viewer'];
						header("Location: $redirect_url");
					} else {
						die($json_array['status_code']);
					}
				break;
			}
			die();
		} else {
			G\Render\json_output($json_array);
		}
		
	} catch(Exception $e) {
		$json_array = G\json_error($e);
		if($version == 1) {
			switch($_REQUEST['format']) {
				default:
				case 'json':
					G\Render\json_output($json_array);
					break;
				case 'txt':
				case 'redirect':
					die($json_array['error']['message']);
					break;
			}
		} else {
			G\Render\json_output($json_array);
		}
		
	}
};