<?php
/**
 * Chevereto REST API
 * This file is the API implementation since Chevereto 2.0
 *
 * @version		1.2
 * @author		Rodolfo Berríos <http://rodolfoberrios.com/>
 * @url			<http://godlikestudio.com>
 * @package		Chevereto <http://chevereto.com>
 *
 * @copyright	Rodolfo Berríos <inbox@rodolfoberrios.com>
 *
 */

define('access', 'API');

$key		= $_REQUEST['key'];
$to_upload	= $_REQUEST['upload'];
$to_resize	= $_REQUEST['resize_width'];
$format		= $_REQUEST['format'];
$callback	= $_REQUEST['callback'];

require_once('includes/chevereto.php');
require_once(__CHV_PATH_CLASSES__.'class.upload.php');

/*** Die, die, die my darling ***/
if(chevereto_config('api_key')=='my_api_key' and chevereto_config('api_mode')=='private') {
	chevereto_die(array('Open <code>includes/config.php</code>','Edit <code>$config[\'api_key\'] = \'my_api_key\';</code> with a different key.'), 'API key', array('It seems that you haven\'t changed the default api key, the API won\'t work until you fix this.'));
}

/*** Checks the auth ***/
if(api_mode('private') and api_key()!==$key) {
	$error_key_msg = 'Invalid API key';
	$ERROR_AUTH_API = array(
		'status_code' 	=> 403,
		'status_txt' 	=> $error_key_msg
	);
	switch($format) {
		default:
		case 'json':
		default:
			json_output($ERROR_AUTH_API, $callback);
		break;
		case 'xml':
			xml_output($ERROR_AUTH_API);
		break;
		case 'txt':
			echo $error_key_msg;
		break;
	}
	exit; // Shout the door
}

/*** Observe the image request ***/
if(is_url($to_upload)) {
	$api_remote_upload = true;
} else {
	if(check_value($_REQUEST['upload']) or check_value($_FILES['upload'])) {
		// Creates the temp image
		$api_temp_name = __CHV_PATH_IMAGES__.generateRandomString(16).'.temp';
		while(file_exists($api_temp_name)) {
			$api_temp_name = __CHV_PATH_IMAGES__.generateRandomString(16).'.temp';
		}
		if(check_value($_FILES['upload']['tmp_name'])) {
			$to_upload = $_FILES['upload'];
		} else {
			// Handles the stream
			$fh = fopen($api_temp_name,'w');
			stream_filter_append($fh,'convert.base64-decode',STREAM_FILTER_WRITE);
			fwrite($fh, $_REQUEST['upload']);
			fclose($fh);
			// Since all the validations works with $_FILES, we're going to emulate it.
			$to_upload = array(
				'name'		=> generateRandomString(5).'.jpg',
				'type'		=> 'image/jpeg',
				'tmp_name'	=> $api_temp_name,
				'error'		=> 'UPLOAD_ERR_OK',
				'size'		=> '1'
			);
		}

	}
}

$api_upload = new Upload($to_upload);
if($api_remote_upload) $api_upload->is_remote = true;

$api_upload->img_upload_path = __CHV_PATH_IMAGES__;
$api_upload->thumb_upload_path = __CHV_PATH_THUMBS__;

$api_upload->resize_width = $to_resize;
$api_upload->thumb_width = chevereto_config('thumb_width');
$api_upload->thumb_height = chevereto_config('thumb_height');

$api_upload->max_size = mb_to_bytes(chevereto_config('max_size_mb'));

/*** Do the thing? ***/
if($api_upload->process()) {

	$api_status_code = 200;
	$api_status_txt = 'OK';
	// Build the data array
	$api_data_array = $api_upload->image_info;
	if($api_upload->is_remote) {
		$api_data_array['source'] = $to_upload;
	} else {
		$api_data_array['source'] = 'base64 image string';
	}
	$api_data_array['resized'] = check_value($to_resize) ? '1' : '0';
	$api_txt_output = $api_upload->image_info['img_url'];

	// Short URL generation
	if(is_config_short_url()) {
		require_once(__CHV_PATH_INCLUDES__.'shorturl.php');
		$api_data_array['shorturl'] = $ShortURL->get_ShortURL($api_upload->image_info['img_url']);
	}

} else {
	$api_status_code = 403;
	$api_status_txt = $api_upload->error;
	$api_txt_output = $api_status_txt;
}

$REST_API = array(
		'status_code' 	=> $api_status_code,
		'status_txt' 	=> $api_status_txt,
		'data'			=> $api_data_array
);

$OUTPUT_REST_API = array_filter($REST_API);

switch($format) {
	default:
	case 'json':
	default:
		json_output($OUTPUT_REST_API, $callback);
	break;
	case 'xml':
		xml_output($OUTPUT_REST_API);
	break;
	case 'txt':
		echo $api_txt_output;
	break;
	case 'redirect':
		$redirect_url = __CHV_BASE_URL__.'?v='.$api_upload->image_info['img_name'];
		header("Location: $redirect_url");
	break;
}

?>