马宇豪
2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18
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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Ivan Kopeykin @vankop
*/
 
"use strict";
 
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
 
const slashCode = "/".charCodeAt(0);
const backslashCode = "\\".charCodeAt(0);
 
/**
 * @param {string} path path
 * @param {string} parent parent path
 * @returns {boolean} true, if path is inside of parent
 */
const isInside = (path, parent) => {
    if (!path.startsWith(parent)) return false;
    if (path.length === parent.length) return true;
    const charCode = path.charCodeAt(parent.length);
    return charCode === slashCode || charCode === backslashCode;
};
 
module.exports = class RestrictionsPlugin {
    /**
     * @param {string | ResolveStepHook} source source
     * @param {Set<string | RegExp>} restrictions restrictions
     */
    constructor(source, restrictions) {
        this.source = source;
        this.restrictions = restrictions;
    }
 
    /**
     * @param {Resolver} resolver the resolver
     * @returns {void}
     */
    apply(resolver) {
        resolver
            .getHook(this.source)
            .tapAsync("RestrictionsPlugin", (request, resolveContext, callback) => {
                if (typeof request.path === "string") {
                    const path = request.path;
                    for (const rule of this.restrictions) {
                        if (typeof rule === "string") {
                            if (!isInside(path, rule)) {
                                if (resolveContext.log) {
                                    resolveContext.log(
                                        `${path} is not inside of the restriction ${rule}`
                                    );
                                }
                                return callback(null, null);
                            }
                        } else if (!rule.test(path)) {
                            if (resolveContext.log) {
                                resolveContext.log(
                                    `${path} doesn't match the restriction ${rule}`
                                );
                            }
                            return callback(null, null);
                        }
                    }
                }
 
                callback();
            });
    }
};