@alicd/templateparser/src/modules/express.js

walle template parser

/**
 * @license
 * Copyright Alibaba Group and its affiliates. All Rights Reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import config from '../config';

// output type reg.
const outputTag = new RegExp(
  '^\\' + config.expressStartTag + '(.+?)\\' + config.expressEndTag + '$'
);

const jsonTag = new RegExp('^\\{(.+?)\\}$');

const spreadAttribute = config.spreadAttribute;
class Express {
  test(str = '') {
    const isOutput = outputTag.test(str);
    const isExpress = jsonTag.test(str);
    const isSpreadAttribute = spreadAttribute.test(str);
    return isOutput || isExpress || isSpreadAttribute;
  }

  filter(str = '') {
    if (str.match(spreadAttribute)) {
      return str.match(spreadAttribute)[1];
    } else if (str.match(outputTag)) {
      return str.match(outputTag)[1];
    } else if (str.match(jsonTag)) {
      return str.match(jsonTag)[1];
    } else {
      return str;
    }
  }
}

export default new Express();