CompatSource.js
9045e4d5dbe1drf-api-tracking

CompatSource.js
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			/*
			MIT License http://www.opensource.org/licenses/mit-license.php
			Author Tobias Koppers @sokra
			*/
			"use strict";

			const Source = require("./Source");

			class CompatSource extends Source {
			static from(sourceLike) {
			return sourceLike instanceof Source
			? sourceLike
			: new CompatSource(sourceLike);
			}

			constructor(sourceLike) {
			super();
			this._sourceLike = sourceLike;
			}

			source() {
			return this._sourceLike.source();
			}

			buffer() {
			if (typeof this._sourceLike.buffer === "function") {
			return this._sourceLike.buffer();
			}
			return super.buffer();
			}

			size() {
			if (typeof this._sourceLike.size === "function") {
			return this._sourceLike.size();
			}
			return super.size();
			}

			map(options) {
			if (typeof this._sourceLike.map === "function") {
			return this._sourceLike.map(options);
			}
			return super.map(options);
			}

			sourceAndMap(options) {
			if (typeof this._sourceLike.sourceAndMap === "function") {
			return this._sourceLike.sourceAndMap(options);
			}
			return super.sourceAndMap(options);
			}

			updateHash(hash) {
			if (typeof this._sourceLike.updateHash === "function") {
			return this._sourceLike.updateHash(hash);
			}
			if (typeof this._sourceLike.map === "function") {
			throw new Error(
			"A Source-like object with a 'map' method must also provide an 'updateHash' method"
			);
			}
			hash.update(this.buffer());
			}
			}

			module.exports = CompatSource;