<?php
/*
Plugin Name: Ajax Thumbnailer
Version: 0.3
Description: gestion de miniatures en masse / mass thumbnail generator
Plugin URI: http://piwigo.org/ext/extension_view.php?eid=327
Author: Bruno Hondelatte
Author URI: http://morefnu.org
*/

ini_set('error_reporting', E_ALL);
ini_set('display_errors', true);

if (!defined('PHPWG_ROOT_PATH')) die('Hacking attempt!');

class AjaxThumbnailer
{
	/* This function is almost the same as the ont in admin/thumbnail.php , tuned
		for web-service purposes */
	function RatioResizeImg($path, $newWidth, $newHeight, $tn_ext,$gd_version=2) {
		global $conf, $lang, $page;
		
		$starttime = get_moment();

		if (!function_exists('gd_info'))
			return new PwgError(WS_ERR_INVALID_PARAM,  'no gd');

		if (!file_exists($path))
			return new PwgError(WS_ERR_INVALID_PARAM,  'file not found');

		$filename = basename($path);
		$dirname = dirname($path);

		// extension of the picture filename
		$extension = get_extension($filename);

		if (in_array($extension, array('jpg', 'JPG', 'jpeg', 'JPEG'))) {
			$srcImage = @imagecreatefromjpeg($path);
		}
		elseif ($extension == 'png' or $extension == 'PNG') {
			$srcImage = @imagecreatefrompng($path);
		} else {
			unset($extension);
		}

		if ( isset( $srcImage ) ) {
			// width/height
			$srcWidth    = imagesx( $srcImage ); 
			$srcHeight   = imagesy( $srcImage ); 
			$ratioWidth  = $srcWidth/$newWidth;
			$ratioHeight = $srcHeight/$newHeight;

			// maximal size exceeded ?
			if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) ) {
				if ( $ratioWidth < $ratioHeight) { 
					$destWidth = $srcWidth/$ratioHeight;
					$destHeight = $newHeight; 
				} else { 
					$destWidth = $newWidth; 
					$destHeight = $srcHeight/$ratioWidth;
				}
			} else {
				$destWidth = $srcWidth;
				$destHeight = $srcHeight;
			}
			// according to the GD version installed on the server
			if ( $gd_version == 2 ) {
				// GD 2.0 or more recent -> good results (but slower)
				$destImage = imagecreatetruecolor( $destWidth, $destHeight); 
				imagecopyresampled( $destImage, $srcImage, 0, 0, 0, 0,
					$destWidth,$destHeight,$srcWidth,$srcHeight );
			} else {
				// GD prior to version  2 -> pretty bad results :-/ (but fast)
				$destImage = imagecreate( $destWidth, $destHeight);
				imagecopyresized( $destImage, $srcImage, 0, 0, 0, 0,
					$destWidth,$destHeight,$srcWidth,$srcHeight );
			}

			if (($tndir = mkget_thumbnail_dir($dirname)) == false) {
				return new PwgError(WS_ERR_INVALID_PARAM,  '['.$tndir.'] : '.l10n('no_write_access'));
			}

			$dest_file = $tndir.'/'.$conf['prefix_thumbnail'];
			$dest_file.= get_filename_wo_extension($filename);
			$dest_file.= '.'.$tn_ext;

			// creation and backup of final picture
			if (!is_writable($tndir))
				return new PwgError(WS_ERR_INVALID_PARAM,  '['.$tndir.'] : '.l10n('no_write_access'));
				
			imagejpeg($destImage, $dest_file, $conf['tn_compression_level']);
			// freeing memory ressources
			imagedestroy( $srcImage );
			imagedestroy( $destImage );

			list($tn_width, $tn_height) = getimagesize($dest_file);
			$tn_size = floor(filesize($dest_file) / 1024).' KB';

			$endtime = get_moment();
			
			$info = array( 'path'      => $path,
			'tn_file'   => $dest_file,
			'tn_width'  => $tn_width,
			'tn_height' => $tn_height,
			'tn_size'   => $tn_size,
			'tn_time'	=> number_format(($endtime - $starttime) * 1000, 2, '.', ' ').' ms');
			return $info;
		} else {
			// error
			$err=l10n('tn_no_support');
			if ( isset( $extension ) )
				$err .= l10n('tn_format').' '.$extension;
			else
				$err .= l10n('tn_thisformat');
			return new PwgError(WS_ERR_INVALID_PARAM, $err);
		}
	}

	function plugin_admin_menu($menu) {
        array_push($menu,
            array(
                'NAME' => 'Ajax Thumbnailer',
                'URL' => get_admin_plugin_menu_link(dirname(__FILE__).'/admin/thumbnailer_admin.php')
            )
        );
        return $menu;
    }

	function ws_methods($arr) {
		$service = &$arr[0];
		$service->addMethod('pwg.thumbnail.create', array($this,'create_thumb'),
		  array(
			'picture'=>array(),
			'width'=>array('default'=>"128"),
			'height'=>array('default'=>"128"),
			'ext'=>array('default'=>"jpg")
		  ),
		  'Creates a thumbnail for a given image,
		<br><b>picture</b> is the name of the picture to create thumbnail from.'
		);
		
	}
	
	function create_thumb($params, $service) {
		$picture = $params['picture'];
		$width = (integer)$params['width'];
		$height = (integer)$params['height'];
		$gd_version = (integer)$params['gd_version'];		
		$ext =$params['ext'];
		return $this->RatioResizeImg($picture,$width,$height,$ext,$gd_version);
	}
	
}
$obj = new AjaxThumbnailer();

add_event_handler('ws_add_methods', array(&$obj, 'ws_methods'));
add_event_handler('get_admin_plugin_menu_links', array(&$obj, 'plugin_admin_menu') );
set_plugin_data($plugin['id'], $obj);

?>