fix: name generation conflict resolution

would create variables with the same name "renameMe"

Author: Arthur Geron

__tests__/require-usememo.test.ts

@@ -481,11 +481,63 @@ describe('Rule - Require-usememo', () =>  {
         const Component = () => {
           const userData = undefined;
           const _userData = undefined;
+          const __userData = useMemo(() => ({}), []);
+          return <Child userData={__userData} />;
+        }`,
+        errors: [{ messageId: "object-usememo-props" }],
+      },
+      {
+        code: `
+        const Component = () => {
+          const userData = undefined;
+          const _userData = undefined;
+          const __userData = undefined;
+          const ___userData = undefined;
+          const ____userData = undefined;
+          const _____userData = undefined;
+          return <Child userData={{}} />;
+        }`,
+        output: `import { useMemo } from 'react';
+
+        const Component = () => {
+          const userData = undefined;
+          const _userData = undefined;
+          const __userData = undefined;
+          const ___userData = undefined;
+          const ____userData = undefined;
+          const _____userData = undefined;
           const renameMe = useMemo(() => ({}), []);
           return <Child userData={renameMe} />;
         }`,
         errors: [{ messageId: "object-usememo-props" }],
       },
+      {
+        code: `
+        const Component = () => {
+          const userData = undefined;
+          const _userData = undefined;
+          const __userData = undefined;
+          const ___userData = undefined;
+          const ____userData = undefined;
+          const _____userData = undefined;
+          const renameMe = undefined;
+          return <Child userData={{}} />;
+        }`,
+        output: `import { useMemo } from 'react';
+
+        const Component = () => {
+          const userData = undefined;
+          const _userData = undefined;
+          const __userData = undefined;
+          const ___userData = undefined;
+          const ____userData = undefined;
+          const _____userData = undefined;
+          const renameMe = undefined;
+          const renameMe_99c32a94 = useMemo(() => ({}), []);
+          return <Child userData={renameMe_99c32a94} />;
+        }`,
+        errors: [{ messageId: "object-usememo-props" }],
+      },
       {
         code: `
         const Component = () => {

package.json

@@ -17,6 +17,7 @@
     "@rollup/plugin-typescript": "8.3.3",
     "@types/eslint": "8.4.5",
     "@types/jest": "28.1.5",
+    "@types/uuid": "9.0.6",
     "@typescript-eslint/parser": "5.30.6",
     "@typescript-eslint/types": "5.30.6",
     "eslint": "8.19.0",
@@ -37,5 +38,8 @@
   },
   "files": [
     "dist"
-  ]
+  ],
+  "dependencies": {
+    "uuid": "9.0.1"
+  }
 }

src/require-usememo/constants.ts

@@ -1,6 +1,7 @@
 import { MemoStatus } from 'src/types';
 import type { ExpressionData, MemoErrorHookDictionary } from './types';
 
+export const nameGeneratorUUID = 'b32a4d70-4f64-11eb-89d5-33e6ce8a6c99';
 export const jsxEmptyExpressionClassData: ExpressionData = {
   [MemoStatus.UnmemoizedObject.toString()]: "object-class-memo-props",
   [MemoStatus.UnmemoizedArray.toString()]: "array-class-memo-props",

src/require-usememo/utils.ts

@@ -4,9 +4,9 @@ import type * as ESTree from "estree";
 import { MessagesRequireUseMemo } from '../constants';
 import type { ESNode, ExpressionData, ReactImportInformation } from "./types";
 import { MemoStatusToReport } from "src/types";
-import { messageIdToHookDict } from "./constants";
+import { messageIdToHookDict, nameGeneratorUUID } from "./constants";
 import { getVariableInScope } from "src/common";
-
+import { v5 as uuidV5 } from 'uuid';
 
 export function shouldIgnoreNode(node: ESNode, ignoredNames: Record<string,boolean | undefined> ) {
   return !!ignoredNames[(node as TSESTree.Node as TSESTree.Identifier)?.name]
@@ -116,15 +116,18 @@ function fixFunction(node: TSESTree.FunctionDeclaration | TSESTree.FunctionExpre
   return fixedCode;
 }
 
-function getSafeVariableName(context: Rule.RuleContext, name: string) {
+function getSafeVariableName(context: Rule.RuleContext, name:string, attempts = 0): string {
   const tempVarPlaceholder = 'renameMe';
+  
   if (!getVariableInScope(context, name)) {
     return name;
   }
-  if (!getVariableInScope(context, `_${name}`)) {
-    return `_${name}`;
+  if (attempts >= 5) {
+    const nameExtensionIfExists = getVariableInScope(context, tempVarPlaceholder) ? uuidV5(name, nameGeneratorUUID).split('-')[0] : '';
+    return `${tempVarPlaceholder}${nameExtensionIfExists ? `_${nameExtensionIfExists}` : ''}`;
   }
-  return tempVarPlaceholder;
+  return getSafeVariableName(context, `_${name}`, ++attempts);
+  
 }
 
 // Eslint Auto-fix logic, functional components/hooks only

yarn.lock

@@ -974,6 +974,11 @@
   resolved "https://registry.yarnpkg.com/@types/stack-utils/-/stack-utils-2.0.2.tgz#01284dde9ef4e6d8cef6422798d9a3ad18a66f8b"
   integrity sha512-g7CK9nHdwjK2n0ymT2CW698FuWJRIx+RP6embAzZ2Qi8/ilIrA1Imt2LVSeHUzKvpoi7BhmmQcXz95eS0f2JXw==
 
+"@types/[email protected]":
+  version "9.0.6"
+  resolved "https://registry.yarnpkg.com/@types/uuid/-/uuid-9.0.6.tgz#c91ae743d8344a54b2b0c691195f5ff5265f6dfb"
+  integrity sha512-BT2Krtx4xaO6iwzwMFUYvWBWkV2pr37zD68Vmp1CDV196MzczBRxuEpD6Pr395HAgebC/co7hOphs53r8V7jew==
+
 "@types/yargs-parser@*":
   version "21.0.2"
   resolved "https://registry.yarnpkg.com/@types/yargs-parser/-/yargs-parser-21.0.2.tgz#7bd04c5da378496ef1695a1008bf8f71847a8b8b"
@@ -3533,6 +3538,11 @@ util-deprecate@^1.0.1:
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==
 
+[email protected]:
+  version "9.0.1"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-9.0.1.tgz#e188d4c8853cc722220392c424cd637f32293f30"
+  integrity sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==
+
 v8-compile-cache-lib@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz#6336e8d71965cb3d35a1bbb7868445a7c05264bf"