zeppelin/zeppelin-examples/zeppelin-example-spell-echo/index.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
    SpellBase,
    SpellResult,
    DefaultDisplayType,
} from 'zeppelin-spell';

export default class EchoSpell extends SpellBase {
    constructor() {
        super("%echo");
    }

    /**
     * Consumes text and return `SpellResult`.
     *
     * @param paragraphText {string} which doesn't include magic
     * @param config {Object}
     * @return {SpellResult}
     */
    interpret(paragraphText, config) {
        let repeat = 1;

        try {
            repeat = parseFloat(config.repeat);
        } catch (error) {
            /** ignore, use default value */
        }

        let repeated = "";

        for (let i = 0; i < repeat; i++) {
            repeated += `${paragraphText}\n`;
        }

        return new SpellResult(repeated);
    }
}