actions/delete_file.php

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<?php
class dataface_actions_delete_file {
        function handle(&$params){
                if ( @$_POST['--field'] ){
                        return $this->handlePost($params);
                } else {
                        return $this->handleGet($params);
                }
        }
        
        function handleGet(&$params){
                return PEAR::raiseError("No implemented yet.  Please use this only via POST method.");
        }
        
        function handlePost(&$params){
                $app =& Dataface_Application::getInstance();
                $query =& $app->getQuery();
                
                if ( !@$_POST['--field'] ) return PEAR::raiseError('No field specified');
                $record =& $app->getRecord();
                
                if ( !$record ) return PEAR::raiseError('No record found');
                
                $fieldDef =& $record->_table->getField($_POST['--field']);
                if ( PEAR::isError($fieldDef) ) return $fieldDef;
                
                if ( !$record->checkPermission('edit', array('field'=>$fieldDef['Field'])) ){
                        return Dataface_Error::permissionDenied('You don\'t have permission to edit this field.');
                }
                
                
                
                if ( $fieldDef['Type'] == 'container' ){
                        $fileName = $record->val($fieldDef['Field']);
                        if ( !$fileName ) return PEAR::raiseError("This record does not contain a file in the $fieldDef[Field] field.");
                        
                        // We need to delete the file from the file system.
                        $path = $fieldDef['savepath'];
                        $filePath = $path.'/'.basename($fileName);
                        @unlink($filePath);
                        
                        $record->setValue($fieldDef['Field'], null);
                        if ( @$fieldDef['mimetype'] ){
                                $mimeTypeField =& $record->_table->getField($fieldDef['mimetype']);
                                if ( !PEAR::isError($mimeTypeField) ){
                                        $record->setValue($fieldDef['mimetype'], null);
                                }
                        }
                        $res = $record->save();
                        if ( PEAR::isError($res) ) return $res;
                                                
                } else if ( $record->_table->isBlob($fieldDef['Field']) ){
                        $record->setValue($fieldDef['Field'], 'dummy');
                        $record->setValue($fieldDef['Field'], null);
                        if ( @$fieldDef['mimetype'] ){
                                $mimetypeField =& $record->_table->getField($fieldDef['mimetype']);
                                if ( !PEAR::isError($mimetypeField) ){
                                        $record->setValue($fieldDef['mimetype'], null);
                                }
                        }
                        
                        if ( @$fieldDef['filename'] ){
                                $filenameField =& $record->_table->getField($fieldDef['filename']);
                                if ( !PEAR::isError($filenameField) ){
                                        $record->setValue($fieldDef['filename'], null);
                                }
                        }
                        $res = $record->save();
                        if ( PEAR::isError($res) ) return $res;
                        
                }
                
                // Now that we have been successful, let's return a success reply.
                if ( @$query['--format'] == 'json' ){
                        import('Services/JSON.php');
                        $json = new Services_JSON;
                        header('Content-type: text/json; charset='.$app->_conf['oe']);
                        echo $json->encode(
                                array(
                                        'success'=>1,
                                        '--msg' => 'Successfully deleted file'
                                )
                        );
                        return;
                } else {
                        $redirect = '';
                        if ( !$redirect ) $redirect = @$query['-redirect'];
                        if ( !$redirect ) $redirect = @$_SERVER['HTTP_REFERER'];
                        if ( !$redirect ) $redirect = $record->getURL('-action=edit');
                        
                        if ( !$redirect or PEAR::isError($redirect) ){
                                $redirect = DATAFACE_SITE_HREF;
                        }
                        
                        if ( strpos($redirect, '?') === false ) $redirect .= '?';
                        $redirect .= '&--msg='.urlencode("File successfully deleted.");
                        $app->redirect("$redirect");
                }
                
        }
}