init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
 
module.exports = class ParsePlugin {
    /**
     * @param {string | ResolveStepHook} source source
     * @param {Partial<ResolveRequest>} requestOptions request options
     * @param {string | ResolveStepHook} target target
     */
    constructor(source, requestOptions, target) {
        this.source = source;
        this.requestOptions = requestOptions;
        this.target = target;
    }
 
    /**
     * @param {Resolver} resolver the resolver
     * @returns {void}
     */
    apply(resolver) {
        const target = resolver.ensureHook(this.target);
        resolver
            .getHook(this.source)
            .tapAsync("ParsePlugin", (request, resolveContext, callback) => {
                const parsed = resolver.parse(/** @type {string} */ (request.request));
                /** @type {ResolveRequest} */
                const obj = { ...request, ...parsed, ...this.requestOptions };
                if (request.query && !parsed.query) {
                    obj.query = request.query;
                }
                if (request.fragment && !parsed.fragment) {
                    obj.fragment = request.fragment;
                }
                if (parsed && resolveContext.log) {
                    if (parsed.module) resolveContext.log("Parsed request is a module");
                    if (parsed.directory)
                        resolveContext.log("Parsed request is a directory");
                }
                // There is an edge-case where a request with # can be a path or a fragment -> try both
                if (obj.request && !obj.query && obj.fragment) {
                    const directory = obj.fragment.endsWith("/");
                    /** @type {ResolveRequest} */
                    const alternative = {
                        ...obj,
                        directory,
                        request:
                            obj.request +
                            (obj.directory ? "/" : "") +
                            (directory ? obj.fragment.slice(0, -1) : obj.fragment),
                        fragment: ""
                    };
                    resolver.doResolve(
                        target,
                        alternative,
                        null,
                        resolveContext,
                        (err, result) => {
                            if (err) return callback(err);
                            if (result) return callback(null, result);
                            resolver.doResolve(target, obj, null, resolveContext, callback);
                        }
                    );
                    return;
                }
                resolver.doResolve(target, obj, null, resolveContext, callback);
            });
    }
};