source: imaps-frontend/node_modules/eslint/lib/rules/id-match.js@ d565449

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Last change on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago

Update repo after prototype presentation
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File size: 11.0 KB
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1/**
2 * @fileoverview Rule to flag non-matching identifiers
3 * @author Matthieu Larcher
4 */
5
6"use strict";
7
8//------------------------------------------------------------------------------
9// Rule Definition
10//------------------------------------------------------------------------------
11
12/** @type {import('../shared/types').Rule} */
13module.exports = {
14 meta: {
15 type: "suggestion",
16
17 docs: {
18 description: "Require identifiers to match a specified regular expression",
19 recommended: false,
20 url: "https://eslint.org/docs/latest/rules/id-match"
21 },
22
23 schema: [
24 {
25 type: "string"
26 },
27 {
28 type: "object",
29 properties: {
30 properties: {
31 type: "boolean",
32 default: false
33 },
34 classFields: {
35 type: "boolean",
36 default: false
37 },
38 onlyDeclarations: {
39 type: "boolean",
40 default: false
41 },
42 ignoreDestructuring: {
43 type: "boolean",
44 default: false
45 }
46 },
47 additionalProperties: false
48 }
49 ],
50 messages: {
51 notMatch: "Identifier '{{name}}' does not match the pattern '{{pattern}}'.",
52 notMatchPrivate: "Identifier '#{{name}}' does not match the pattern '{{pattern}}'."
53 }
54 },
55
56 create(context) {
57
58 //--------------------------------------------------------------------------
59 // Options
60 //--------------------------------------------------------------------------
61 const pattern = context.options[0] || "^.+$",
62 regexp = new RegExp(pattern, "u");
63
64 const options = context.options[1] || {},
65 checkProperties = !!options.properties,
66 checkClassFields = !!options.classFields,
67 onlyDeclarations = !!options.onlyDeclarations,
68 ignoreDestructuring = !!options.ignoreDestructuring;
69
70 const sourceCode = context.sourceCode;
71 let globalScope;
72
73 //--------------------------------------------------------------------------
74 // Helpers
75 //--------------------------------------------------------------------------
76
77 // contains reported nodes to avoid reporting twice on destructuring with shorthand notation
78 const reportedNodes = new Set();
79 const ALLOWED_PARENT_TYPES = new Set(["CallExpression", "NewExpression"]);
80 const DECLARATION_TYPES = new Set(["FunctionDeclaration", "VariableDeclarator"]);
81 const IMPORT_TYPES = new Set(["ImportSpecifier", "ImportNamespaceSpecifier", "ImportDefaultSpecifier"]);
82
83 /**
84 * Checks whether the given node represents a reference to a global variable that is not declared in the source code.
85 * These identifiers will be allowed, as it is assumed that user has no control over the names of external global variables.
86 * @param {ASTNode} node `Identifier` node to check.
87 * @returns {boolean} `true` if the node is a reference to a global variable.
88 */
89 function isReferenceToGlobalVariable(node) {
90 const variable = globalScope.set.get(node.name);
91
92 return variable && variable.defs.length === 0 &&
93 variable.references.some(ref => ref.identifier === node);
94 }
95
96 /**
97 * Checks if a string matches the provided pattern
98 * @param {string} name The string to check.
99 * @returns {boolean} if the string is a match
100 * @private
101 */
102 function isInvalid(name) {
103 return !regexp.test(name);
104 }
105
106 /**
107 * Checks if a parent of a node is an ObjectPattern.
108 * @param {ASTNode} node The node to check.
109 * @returns {boolean} if the node is inside an ObjectPattern
110 * @private
111 */
112 function isInsideObjectPattern(node) {
113 let { parent } = node;
114
115 while (parent) {
116 if (parent.type === "ObjectPattern") {
117 return true;
118 }
119
120 parent = parent.parent;
121 }
122
123 return false;
124 }
125
126 /**
127 * Verifies if we should report an error or not based on the effective
128 * parent node and the identifier name.
129 * @param {ASTNode} effectiveParent The effective parent node of the node to be reported
130 * @param {string} name The identifier name of the identifier node
131 * @returns {boolean} whether an error should be reported or not
132 */
133 function shouldReport(effectiveParent, name) {
134 return (!onlyDeclarations || DECLARATION_TYPES.has(effectiveParent.type)) &&
135 !ALLOWED_PARENT_TYPES.has(effectiveParent.type) && isInvalid(name);
136 }
137
138 /**
139 * Reports an AST node as a rule violation.
140 * @param {ASTNode} node The node to report.
141 * @returns {void}
142 * @private
143 */
144 function report(node) {
145
146 /*
147 * We used the range instead of the node because it's possible
148 * for the same identifier to be represented by two different
149 * nodes, with the most clear example being shorthand properties:
150 * { foo }
151 * In this case, "foo" is represented by one node for the name
152 * and one for the value. The only way to know they are the same
153 * is to look at the range.
154 */
155 if (!reportedNodes.has(node.range.toString())) {
156
157 const messageId = (node.type === "PrivateIdentifier")
158 ? "notMatchPrivate" : "notMatch";
159
160 context.report({
161 node,
162 messageId,
163 data: {
164 name: node.name,
165 pattern
166 }
167 });
168 reportedNodes.add(node.range.toString());
169 }
170 }
171
172 return {
173
174 Program(node) {
175 globalScope = sourceCode.getScope(node);
176 },
177
178 Identifier(node) {
179 const name = node.name,
180 parent = node.parent,
181 effectiveParent = (parent.type === "MemberExpression") ? parent.parent : parent;
182
183 if (isReferenceToGlobalVariable(node)) {
184 return;
185 }
186
187 if (parent.type === "MemberExpression") {
188
189 if (!checkProperties) {
190 return;
191 }
192
193 // Always check object names
194 if (parent.object.type === "Identifier" &&
195 parent.object.name === name) {
196 if (isInvalid(name)) {
197 report(node);
198 }
199
200 // Report AssignmentExpressions left side's assigned variable id
201 } else if (effectiveParent.type === "AssignmentExpression" &&
202 effectiveParent.left.type === "MemberExpression" &&
203 effectiveParent.left.property.name === node.name) {
204 if (isInvalid(name)) {
205 report(node);
206 }
207
208 // Report AssignmentExpressions only if they are the left side of the assignment
209 } else if (effectiveParent.type === "AssignmentExpression" && effectiveParent.right.type !== "MemberExpression") {
210 if (isInvalid(name)) {
211 report(node);
212 }
213 }
214
215 // For https://github.com/eslint/eslint/issues/15123
216 } else if (
217 parent.type === "Property" &&
218 parent.parent.type === "ObjectExpression" &&
219 parent.key === node &&
220 !parent.computed
221 ) {
222 if (checkProperties && isInvalid(name)) {
223 report(node);
224 }
225
226 /*
227 * Properties have their own rules, and
228 * AssignmentPattern nodes can be treated like Properties:
229 * e.g.: const { no_camelcased = false } = bar;
230 */
231 } else if (parent.type === "Property" || parent.type === "AssignmentPattern") {
232
233 if (parent.parent && parent.parent.type === "ObjectPattern") {
234 if (!ignoreDestructuring && parent.shorthand && parent.value.left && isInvalid(name)) {
235 report(node);
236 }
237
238 const assignmentKeyEqualsValue = parent.key.name === parent.value.name;
239
240 // prevent checking righthand side of destructured object
241 if (!assignmentKeyEqualsValue && parent.key === node) {
242 return;
243 }
244
245 const valueIsInvalid = parent.value.name && isInvalid(name);
246
247 // ignore destructuring if the option is set, unless a new identifier is created
248 if (valueIsInvalid && !(assignmentKeyEqualsValue && ignoreDestructuring)) {
249 report(node);
250 }
251 }
252
253 // never check properties or always ignore destructuring
254 if ((!checkProperties && !parent.computed) || (ignoreDestructuring && isInsideObjectPattern(node))) {
255 return;
256 }
257
258 // don't check right hand side of AssignmentExpression to prevent duplicate warnings
259 if (parent.right !== node && shouldReport(effectiveParent, name)) {
260 report(node);
261 }
262
263 // Check if it's an import specifier
264 } else if (IMPORT_TYPES.has(parent.type)) {
265
266 // Report only if the local imported identifier is invalid
267 if (parent.local && parent.local.name === node.name && isInvalid(name)) {
268 report(node);
269 }
270
271 } else if (parent.type === "PropertyDefinition") {
272
273 if (checkClassFields && isInvalid(name)) {
274 report(node);
275 }
276
277 // Report anything that is invalid that isn't a CallExpression
278 } else if (shouldReport(effectiveParent, name)) {
279 report(node);
280 }
281 },
282
283 "PrivateIdentifier"(node) {
284
285 const isClassField = node.parent.type === "PropertyDefinition";
286
287 if (isClassField && !checkClassFields) {
288 return;
289 }
290
291 if (isInvalid(node.name)) {
292 report(node);
293 }
294 }
295
296 };
297
298 }
299};
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