<?php
/**
* Ajax "diff" route, for rendering PO/POT file diffs
*/
class Loco_ajax_DiffController extends Loco_mvc_AjaxController {
/**
* {@inheritdoc}
*/
public function render(){
$post = $this->validate();
// require x2 valid files for diffing
if( ! $post->lhs || ! $post->rhs ){
throw new InvalidArgumentException('Path parameters required');
}
$dir = loco_constant('WP_CONTENT_DIR');
$lhs = new Loco_fs_File( $post->lhs ); $lhs->normalize($dir);
$rhs = new Loco_fs_File( $post->rhs ); $rhs->normalize($dir);
// avoid diffing non Gettext source files
$exts = array_flip( [ 'pot', 'pot~', 'po', 'po~' ] );
/* @var $file Loco_fs_File */
foreach( [$lhs,$rhs] as $file ){
if( ! $file->exists() ){
throw new InvalidArgumentException('File paths must exist');
}
if( ! $file->underContentDirectory() ){
throw new InvalidArgumentException('Files must be under '.basename($dir) );
}
$ext = $file->extension();
if( ! isset($exts[$ext]) ){
throw new InvalidArgumentException('Disallowed file extension');
}
}
// OK to diff files as HTML table
$renderer = new Loco_output_DiffRenderer;
$emptysrc = $renderer->_startDiff().$renderer->_endDiff();
$tablesrc = $renderer->renderFiles( $rhs, $lhs );
if( $tablesrc === $emptysrc ){
// translators: Where %s is a file name
$message = __('Revisions are identical, you can delete %s','loco-translate');
$this->set( 'error', sprintf( $message, $rhs->basename() ) );
}
else {
$this->set( 'html', $tablesrc );
}
return parent::render();
}
}