javascript/packages/fury/lib/util.ts

/*
 * 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 const utf8Encoder = new TextEncoder();

const isReserved = (key: string) => {
  return /^(?:do|if|in|for|let|new|try|var|case|else|enum|eval|false|null|this|true|void|with|break|catch|class|const|super|throw|while|yield|delete|export|import|public|return|static|switch|typeof|default|extends|finally|package|private|continue|debugger|function|arguments|interface|protected|implements|instanceof)$/.test(key);
};

const isDotPropAccessor = (prop: string) => {
  return /^[a-zA-Z_$][0-9a-zA-Z_$]*$/.test(prop);
};

export const replaceBackslashAndQuote = (v: string) => {
  return v.replace(/\\/g, "\\\\").replace(/"/g, "\\\"");
};

export const safePropAccessor = (prop: string) => {
  if (!isDotPropAccessor(prop) || isReserved(prop)) {
    return `["${replaceBackslashAndQuote(prop)}"]`;
  }
  return `.${prop}`;
};

export const safePropName = (prop: string) => {
  if (!isDotPropAccessor(prop) || isReserved(prop)) {
    return `["${replaceBackslashAndQuote(prop)}"]`;
  }
  return prop;
};

export const isNodeEnv: boolean
  = typeof process !== "undefined"
  && process.versions != null
  && process.env.ECMA_ONLY !== "true"
  && process.versions.node != null;