watson-developer-cloud/lib/json-training-to-csv.js

Client library to use the IBM Watson Services and AlchemyAPI

"use strict";
/**
 * Copyright 2015 IBM Corp. All Rights Reserved.
 *
 * Licensed 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.
 */
var stringify = require("csv-stringify");
/**
 * @private
 * @param {Object} data
 * @return {string[]}
 * @throws {Error}
 */
function toCSVArray(data) {
    if (data.text && data.classes && data.classes.length > 0) {
        return [data.text].concat(data.classes);
    }
    else {
        throw Error('Invalid training_data format, it needs to be: ' +
            '[{ text: "my-text", classes:["my-class1", "my-class2",...]}, {}, ...]');
    }
}
/**
 * IF traning is json, convert it to csv.
 * @param  {Object[]} jsonData the training_data as a json array
 * @param  {Function} cb the error first callback
 */
function toCSV(training, cb) {
    if (Array.isArray(training)) {
        try {
            stringify(training.map(toCSVArray), cb);
        }
        catch (e) {
            cb(e);
        }
    }
    else {
        cb(null, training);
    }
}
module.exports = toCSV;
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