/Applications/XAMPP/xamppfiles/htdocs/nanofabrication/modules/ajax_upload/actions/ajax_upload_delete_temp_file.php

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<?php
class actions_ajax_upload_delete_temp_file {
        
        const CODE_NO_SUCH_FILE = 404;
        const CODE_PERMISSION_DENIED = 400;
        const CODE_FIELD_EMPTY = 405;
        

        function handle($params){
        
                $app = Dataface_Application::getInstance();
                $query = $app->getQuery();
                
                if ( !@$_POST['--field'] ) throw new Exception("No field specified");
                //if ( !@$_POST['--fileId'] ) throw new Exception("No file id specified");
        
                $fieldName = $_POST['--field'];
                $tableName = $_POST['-table'];
                $fileId = null;
                $recordId = null;
                if ( @$_POST['--fileId'] ){
                        $fileId = $_POST['--fileId'];
                } else if ( @$_POST['--recordId'] ){
                        $recordId = $_POST['--recordId'];
                }
                
                
                $table = Dataface_Table::loadTable($tableName);
                $field =& $table->getField($fieldName);
                try {
                        $savepath = $field['savepath'];
                        if ( $fileId ){
                                
                                $uploadsPath = $savepath.DIRECTORY_SEPARATOR.'uploads';
                                if ( !is_dir($uploadsPath) ){
                                        throw new Exception("Uploads directory for field $field of table $table does not exist.");
                                }
                                
                                $filePath = $uploadsPath.DIRECTORY_SEPARATOR.basename($fileId);
                                if ( !file_exists($filePath) ){
                                        throw new Exception("The file does not exist.", self::CODE_NO_SUCH_FILE);
                                }
                                
                                if ( !@unlink($filePath) ){
                                        throw new Exception("Failed to delete file.  There is likely a permissions issue preventing the file from being deleted.");
                                        
                                }
                        } else if ( $recordId ){
                                $record = df_get_record_by_id($recordId);
                                if ( !$record ){
                                        throw new Exception("Could not find record with id $recordId.  File could not be deleted.");
                                }
                                if ( !$record->checkPermission('edit', array('field'=>$fieldName)) ){
                                        throw new Exception('Failed to delete file because you don\'t have edit permission on this field.', self::CODE_PERMISSION_DENIED);
                                        
                                }
                                
                                $val = $record->val($fieldName);
                                if ( !$val ){
                                        throw new Exception('There was no file to delete.', self::CODE_FIELD_EMPTY);
                                }
                                
                                $filePath = $savepath.DIRECTORY_SEPARATOR.basename($val);
                                if ( file_exists($filePath) ){
                                        //throw new Exception("The file does not exist.", self::CODE_NO_SUCH_FILE);
                                        if ( !@unlink($filePath) ){
                                                throw new Exception("Failed to delete file.  There is likely a file-system permissions issue preventing the file from being deleted.");
                                                
                                        }
                                }
                                
                                
                                $record->setValue($fieldName, null);
                                $record->save();
                                
                        
                        } else {
                                throw new Exception("Must supply either --recordId or --fileId parameter.");
                        }
                        
                        $this->out(array(
                                'code'=>200,
                                'message' => 'Successfully deleted file.'
                        ));
                } catch (Exception $ex){
                
                        if ( $ex->getCode() ){
                                $this->out(array(
                                        'code'=>$ex->getCode(),
                                        'message' => $ex->getMessage()
                                ));
                        } else {
                                error_log('[ajax_upload] '.$ex->getMessage().' on line '.__LINE__.' or file '.__FILE__);
                                
                                $this->out(array(
                                        'code'=>500,
                                        'message' => 'Failed to delete file due to a server error.'
                                ));
                        }
                }
        }
        
        function out($params){
                header('Content-type: text/json; charset="'.Dataface_Application::getInstance()->_conf['oe'].'"');
                echo json_encode($params);
        }
}