yf_locale_editor_export admin module

    public function export()
    {
        $a['back_link'] = url('/@object/vars');
        $a['redirect_link'] = $a['back_link'];
        return $this->_parent->_header_links() . '<div class="col-md-12"><br>' .
            form($a + (array) $_POST)
            ->validate([
                'lang' => 'required',
                'format' => 'required',
            ])
            ->on_validate_ok(function ($data, $e, $vr, $form) {
                return $this->_on_validate_ok($data, $form);
            })
            ->select_box('lang', $this->_parent->_cur_langs)
            ->select_box('format', $this->_parent->_import_export_file_formats)
//			->select_box('module', $this->_parent->_modules)
//			->select_box('plugin', $plugins)
//			->yes_no_box('is_template')
            ->yes_no_box('just_dump')
            ->save_and_back('', ['desc' => 'Export'])
        . '</div>';
    }

    public function _gen_csv(array $data = [], $delim = "\t", $enc = '"')
    {
        if (count((array) $data) === 0) {
            return false;
        }
        ob_start();
        $df = fopen('php://output', 'w');
        fputcsv($df, array_keys(reset($data)), $delim, $enc, '\\');
        foreach ($data as $row) {
            fputcsv($df, $row, $delim, $enc, '\\');
        }
        fclose($df);
        return ob_get_clean();
    }

    public function _gen_json(array $data = [])
    {
        if (count((array) $data) === 0) {
            return false;
        }
        return json_encode($data, JSON_PRETTY_PRINT | JSON_FORCE_OBJECT | JSON_UNESCAPED_UNICODE);
    }

    public function _gen_php(array $data = [])
    {
        if (count((array) $data) === 0) {
            return false;
        }
        return '<?' . 'php' . PHP_EOL . 'return ' . _var_export($data) . ';' . PHP_EOL;
    }

    public function _gen_yaml(array $data = [])
    {
        if (count((array) $data) === 0) {
            return false;
        }
        return trim(trim(yaml_emit($data, YAML_UTF8_ENCODING, YAML_CRLN_BREAK), '.-' . PHP_EOL));
    }

    public function _http_out($name, $body, $format, $just_dump = false)
    {
        no_graphics(true);
        $mime_map = [
            'csv' => 'text/csv',
            'json' => 'text/json',
            'yaml' => 'text/plain',
            'php' => 'text/plain',
        ];
        ! $name && $name = 'export_translation.' . $format;

        if ($just_dump) {
            header('Content-Type: text/plain;charset=utf-8');
        } else {
            header('Content-Type: ' . $mime_map[$format] . ';charset=utf-8');
            header('Content-Type: application/force-download');
            header('Content-Type: application/octet-stream');
            header('Content-Type: application/download');
            header('Content-Disposition: attachment; filename="' . $name . '"');
            header('Content-Transfer-Encoding: binary');
        }
        header('Content-Length: ' . strlen($body));
        echo $body;
        exit();
    }

    public function _init()
    {
        $this->_parent = module('locale_editor');
    }

    public function _on_validate_ok($params = [], $form = null)
    {
        $p = $params ?: $_POST;
        $lang = $p['lang'];
        $to_export = [];
        foreach ((array) $this->_parent->_get_all_vars() as $source => $a) {
            if ( ! isset($a['translation'][$lang])) {
                continue;
            }
            $tr = $a['translation'][$lang];
            if ( ! strlen($tr)) {
                continue;
            }
            $to_export[$source] = $tr;
        }
        if ( ! $to_export) {
            common()->message_error('Export failed, no translations');
            return false;
        }
        $format = $p['format'];
        $name = 'export_' . $lang . '_translation.' . $format;
        $body = '';
        if ($format == 'csv') {
            $tmp = [];
            foreach ((array) $to_export as $k => $v) {
                $tmp[] = [
                    'source' => $k,
                    'translation' => $v,
                ];
            }
            $to_export = $tmp;
            unset($tmp);
            $body = $this->_gen_csv($to_export);
        }
        $format == 'json' && $body = $this->_gen_json($to_export);
        $format == 'yaml' && $body = $this->_gen_yaml($to_export);
        $format == 'php' && $body = $this->_gen_php($to_export);
        if ( ! strlen($body)) {
            common()->message_error('Export failed, empty out');
            return false;
        }
        return $this->_http_out($name, $body, $format, $p['just_dump']);
    }