modules/frontend/app/filters/bytes.filter.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.
 */

export default () => {
    /**
     * @param {number} bytes
     * @param {number} [precision]
     */
    const filter = (bytes, precision) => {
        if (bytes === 0)
            return '0 bytes';

        if (isNaN(parseFloat(bytes)) || !isFinite(bytes))
            return '-';

        if (typeof precision === 'undefined')
            precision = 1;

        const units = ['bytes', 'kB', 'MB', 'GB', 'TB'];
        const number = Math.floor(Math.log(bytes) / Math.log(1024));

        return (bytes / Math.pow(1024, Math.floor(number))).toFixed(precision) + ' ' + units[number];
    };

    return filter;
};