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