OptionsDefaulter.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
function getProperty(obj, name) {
name = name.split(".");
for(let i = 0; i < name.length - 1; i++) {
obj = obj[name[i]];
if(typeof obj !== "object" || !obj) return;
}
return obj[name.pop()];
}
function setProperty(obj, name, value) {
name = name.split(".");
for(let i = 0; i < name.length - 1; i++) {
if(typeof obj[name[i]] !== "object" && typeof obj[name[i]] !== "undefined") return;
if(!obj[name[i]]) obj[name[i]] = {};
obj = obj[name[i]];
}
obj[name.pop()] = value;
}
class OptionsDefaulter {
constructor() {
this.defaults = {};
this.config = {};
}
process(options) {
// TODO: change this for webpack 4: options = Object.assign({}, options);
for(let name in this.defaults) {
switch(this.config[name]) {
case undefined:
if(getProperty(options, name) === undefined)
setProperty(options, name, this.defaults[name]);
break;
case "call":
setProperty(options, name, this.defaults[name].call(this, getProperty(options, name), options), options);
break;
case "make":
if(getProperty(options, name) === undefined)
setProperty(options, name, this.defaults[name].call(this, options), options);
break;
case "append":
{
let oldValue = getProperty(options, name);
if(!Array.isArray(oldValue)) oldValue = [];
oldValue.push.apply(oldValue, this.defaults[name]);
setProperty(options, name, oldValue);
break;
}
default:
throw new Error("OptionsDefaulter cannot process " + this.config[name]);
}
}
// TODO: change this for webpack 4: return options;
}
set(name, config, def) {
if(arguments.length === 3) {
this.defaults[name] = def;
this.config[name] = config;
} else {
this.defaults[name] = config;
delete this.config[name];
}
}
}
module.exports = OptionsDefaulter;