<?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);
        }
       
        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)) {
           
                // Base64 comes from POST?
                if($_SERVER['REQUEST_METHOD'] !== 'POST') {
                    throw new Exception('Uploading source base64 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);
            }
        }
       
        $uploaded_id = CHV\Image::uploadToWebsite($source, NULL, NULL);
        $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':
                default:
                    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':
                default:
                    G\Render\json_output($json_array);
                    break;
                case 'txt':
                case 'redirect':
                    die($json_array['error']['message']);
                    break;
            }
        } else {
            G\Render\json_output($json_array);
        }
       
    }
};