source: imaps-frontend/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js@ 79a0317

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Last change on this file since 79a0317 was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 4 days ago

F4 Finalna Verzija
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File size: 5.2 KB
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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").JsonObject} JsonObject */
12/** @typedef {import("./Resolver").JsonValue} JsonValue */
13/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
14/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
15
16/**
17 * @typedef {Object} DescriptionFileInfo
18 * @property {JsonObject=} content
19 * @property {string} path
20 * @property {string} directory
21 */
22
23/**
24 * @callback ErrorFirstCallback
25 * @param {Error|null=} error
26 * @param {DescriptionFileInfo=} result
27 */
28
29/**
30 * @typedef {Object} Result
31 * @property {string} path path to description file
32 * @property {string} directory directory of description file
33 * @property {JsonObject} content content of description file
34 */
35
36/**
37 * @param {Resolver} resolver resolver
38 * @param {string} directory directory
39 * @param {string[]} filenames filenames
40 * @param {DescriptionFileInfo|undefined} oldInfo oldInfo
41 * @param {ResolveContext} resolveContext resolveContext
42 * @param {ErrorFirstCallback} callback callback
43 */
44function loadDescriptionFile(
45 resolver,
46 directory,
47 filenames,
48 oldInfo,
49 resolveContext,
50 callback
51) {
52 (function findDescriptionFile() {
53 if (oldInfo && oldInfo.directory === directory) {
54 // We already have info for this directory and can reuse it
55 return callback(null, oldInfo);
56 }
57 forEachBail(
58 filenames,
59 /**
60 * @param {string} filename filename
61 * @param {(err?: null|Error, result?: null|Result) => void} callback callback
62 * @returns {void}
63 */
64 (filename, callback) => {
65 const descriptionFilePath = resolver.join(directory, filename);
66 if (resolver.fileSystem.readJson) {
67 resolver.fileSystem.readJson(descriptionFilePath, (err, content) => {
68 if (err) {
69 if (
70 typeof (/** @type {NodeJS.ErrnoException} */ (err).code) !==
71 "undefined"
72 ) {
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 return onJson(err);
82 }
83 if (resolveContext.fileDependencies) {
84 resolveContext.fileDependencies.add(descriptionFilePath);
85 }
86 onJson(null, content);
87 });
88 } else {
89 resolver.fileSystem.readFile(descriptionFilePath, (err, content) => {
90 if (err) {
91 if (resolveContext.missingDependencies) {
92 resolveContext.missingDependencies.add(descriptionFilePath);
93 }
94 return callback();
95 }
96 if (resolveContext.fileDependencies) {
97 resolveContext.fileDependencies.add(descriptionFilePath);
98 }
99
100 /** @type {JsonObject | undefined} */
101 let json;
102
103 if (content) {
104 try {
105 json = JSON.parse(content.toString());
106 } catch (/** @type {unknown} */ e) {
107 return onJson(/** @type {Error} */ (e));
108 }
109 } else {
110 return onJson(new Error("No content in file"));
111 }
112
113 onJson(null, json);
114 });
115 }
116
117 /**
118 * @param {null|Error} [err] error
119 * @param {JsonObject} [content] content
120 * @returns {void}
121 */
122 function onJson(err, content) {
123 if (err) {
124 if (resolveContext.log)
125 resolveContext.log(
126 descriptionFilePath + " (directory description file): " + err
127 );
128 else
129 err.message =
130 descriptionFilePath + " (directory description file): " + err;
131 return callback(err);
132 }
133 callback(null, {
134 content: /** @type {JsonObject} */ (content),
135 directory,
136 path: descriptionFilePath
137 });
138 }
139 },
140 /**
141 * @param {null|Error} [err] error
142 * @param {null|Result} [result] result
143 * @returns {void}
144 */
145 (err, result) => {
146 if (err) return callback(err);
147 if (result) {
148 return callback(null, result);
149 } else {
150 const dir = cdUp(directory);
151 if (!dir) {
152 return callback();
153 } else {
154 directory = dir;
155 return findDescriptionFile();
156 }
157 }
158 }
159 );
160 })();
161}
162
163/**
164 * @param {JsonObject} content content
165 * @param {string|string[]} field field
166 * @returns {JsonValue | undefined} field data
167 */
168function getField(content, field) {
169 if (!content) return undefined;
170 if (Array.isArray(field)) {
171 /** @type {JsonValue} */
172 let current = content;
173 for (let j = 0; j < field.length; j++) {
174 if (current === null || typeof current !== "object") {
175 current = null;
176 break;
177 }
178 current = /** @type {JsonObject} */ (current)[field[j]];
179 }
180 return current;
181 } else {
182 return content[field];
183 }
184}
185
186/**
187 * @param {string} directory directory
188 * @returns {string|null} parent directory or null
189 */
190function cdUp(directory) {
191 if (directory === "/") return null;
192 const i = directory.lastIndexOf("/"),
193 j = directory.lastIndexOf("\\");
194 const p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
195 if (p < 0) return null;
196 return directory.slice(0, p || 1);
197}
198
199exports.loadDescriptionFile = loadDescriptionFile;
200exports.getField = getField;
201exports.cdUp = cdUp;
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