source: trip-planner-front/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const forEachBail = require("./forEachBail");
9
10/** @typedef {import("./Resolver")} Resolver */
11/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
12
13/**
14 * @typedef {Object} DescriptionFileInfo
15 * @property {any=} content
16 * @property {string} path
17 * @property {string} directory
18 */
19
20/**
21 * @callback ErrorFirstCallback
22 * @param {Error|null=} error
23 * @param {DescriptionFileInfo=} result
24 */
25
26/**
27 * @param {Resolver} resolver resolver
28 * @param {string} directory directory
29 * @param {string[]} filenames filenames
30 * @param {DescriptionFileInfo|undefined} oldInfo oldInfo
31 * @param {ResolveContext} resolveContext resolveContext
32 * @param {ErrorFirstCallback} callback callback
33 */
34function loadDescriptionFile(
35 resolver,
36 directory,
37 filenames,
38 oldInfo,
39 resolveContext,
40 callback
41) {
42 (function findDescriptionFile() {
43 if (oldInfo && oldInfo.directory === directory) {
44 // We already have info for this directory and can reuse it
45 return callback(null, oldInfo);
46 }
47 forEachBail(
48 filenames,
49 (filename, callback) => {
50 const descriptionFilePath = resolver.join(directory, filename);
51 if (resolver.fileSystem.readJson) {
52 resolver.fileSystem.readJson(descriptionFilePath, (err, content) => {
53 if (err) {
54 if (typeof err.code !== "undefined") {
55 if (resolveContext.missingDependencies) {
56 resolveContext.missingDependencies.add(descriptionFilePath);
57 }
58 return callback();
59 }
60 if (resolveContext.fileDependencies) {
61 resolveContext.fileDependencies.add(descriptionFilePath);
62 }
63 return onJson(err);
64 }
65 if (resolveContext.fileDependencies) {
66 resolveContext.fileDependencies.add(descriptionFilePath);
67 }
68 onJson(null, content);
69 });
70 } else {
71 resolver.fileSystem.readFile(descriptionFilePath, (err, content) => {
72 if (err) {
73 if (resolveContext.missingDependencies) {
74 resolveContext.missingDependencies.add(descriptionFilePath);
75 }
76 return callback();
77 }
78 if (resolveContext.fileDependencies) {
79 resolveContext.fileDependencies.add(descriptionFilePath);
80 }
81 let json;
82
83 if (content) {
84 try {
85 json = JSON.parse(content.toString());
86 } catch (e) {
87 return onJson(e);
88 }
89 } else {
90 return onJson(new Error("No content in file"));
91 }
92
93 onJson(null, json);
94 });
95 }
96
97 function onJson(err, content) {
98 if (err) {
99 if (resolveContext.log)
100 resolveContext.log(
101 descriptionFilePath + " (directory description file): " + err
102 );
103 else
104 err.message =
105 descriptionFilePath + " (directory description file): " + err;
106 return callback(err);
107 }
108 callback(null, {
109 content,
110 directory,
111 path: descriptionFilePath
112 });
113 }
114 },
115 (err, result) => {
116 if (err) return callback(err);
117 if (result) {
118 return callback(null, result);
119 } else {
120 const dir = cdUp(directory);
121 if (!dir) {
122 return callback();
123 } else {
124 directory = dir;
125 return findDescriptionFile();
126 }
127 }
128 }
129 );
130 })();
131}
132
133/**
134 * @param {any} content content
135 * @param {string|string[]} field field
136 * @returns {object|string|number|boolean|undefined} field data
137 */
138function getField(content, field) {
139 if (!content) return undefined;
140 if (Array.isArray(field)) {
141 let current = content;
142 for (let j = 0; j < field.length; j++) {
143 if (current === null || typeof current !== "object") {
144 current = null;
145 break;
146 }
147 current = current[field[j]];
148 }
149 return current;
150 } else {
151 return content[field];
152 }
153}
154
155/**
156 * @param {string} directory directory
157 * @returns {string|null} parent directory or null
158 */
159function cdUp(directory) {
160 if (directory === "/") return null;
161 const i = directory.lastIndexOf("/"),
162 j = directory.lastIndexOf("\\");
163 const p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
164 if (p < 0) return null;
165 return directory.substr(0, p || 1);
166}
167
168exports.loadDescriptionFile = loadDescriptionFile;
169exports.getField = getField;
170exports.cdUp = cdUp;
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