Extract the content of the case 'Int32' (Flow, TypeScript) into a single emitInt32 function in the parsers-primitives.js file. (#34906)

Summary:
Part of https://github.com/facebook/react-native/issues/34872

Refactors emitInt32 in codegen parser module into a common parsers-primitive.js

## Changelog

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[Internal] [Changed] - Extract the content of the case 'Int32' (Flow, TypeScript) into a single emitInt32 function

Pull Request resolved: https://github.com/facebook/react-native/pull/34906

Test Plan:
Ran `yarn jest react-native-codegen`

<img width="690" alt="Screen Shot 2022-10-09 at 15 45 21" src="https://user-images.githubusercontent.com/6936373/194742142-801a89c8-f803-4e8d-9b05-cf6bda97ea19.png">

Reviewed By: cipolleschi

Differential Revision: D40212544

Pulled By: cipolleschi

fbshipit-source-id: 845e3758ab654edb972a8d8dc3cfa73464e2d49d

packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js

@@ -11,7 +11,7 @@
 
 'use-strict';
 
-const {emitBoolean} = require('../parsers-primitives.js');
+const {emitBoolean, emitInt32} = require('../parsers-primitives.js');
 
 describe('emitBoolean', () => {
   describe('when nullable is true', () => {
@@ -38,3 +38,29 @@ describe('emitBoolean', () => {
     });
   });
 });
+
+describe('emitInt32', () => {
+  describe('when nullable is true', () => {
+    it('returns nullable type annotation', () => {
+      const result = emitInt32(true);
+      const expected = {
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: {
+          type: 'Int32TypeAnnotation',
+        },
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+  describe('when nullable is false', () => {
+    it('returns non nullable type annotation', () => {
+      const result = emitInt32(false);
+      const expected = {
+        type: 'Int32TypeAnnotation',
+      };
+
+      expect(result).toEqual(expected);
+    });
+  });
+});

packages/react-native-codegen/src/parsers/flow/modules/index.js

@@ -33,7 +33,7 @@ const {
   isModuleRegistryCall,
 } = require('../utils.js');
 const {unwrapNullable, wrapNullable} = require('../../parsers-commons');
-const {emitBoolean} = require('../../parsers-primitives');
+const {emitBoolean, emitInt32} = require('../../parsers-primitives');
 const {
   IncorrectlyParameterizedFlowGenericParserError,
   MisnamedModuleFlowInterfaceParserError,
@@ -195,9 +195,7 @@ function translateTypeAnnotation(
           });
         }
         case 'Int32': {
-          return wrapNullable(nullable, {
-            type: 'Int32TypeAnnotation',
-          });
+          return emitInt32(nullable);
         }
         case 'Double': {
           return wrapNullable(nullable, {

packages/react-native-codegen/src/parsers/parsers-primitives.js

@@ -10,7 +10,11 @@
 
 'use strict';
 
-import type {BooleanTypeAnnotation, Nullable} from '../CodegenSchema';
+import type {
+  BooleanTypeAnnotation,
+  Int32TypeAnnotation,
+  Nullable,
+} from '../CodegenSchema';
 
 const {wrapNullable} = require('./parsers-commons');
 
@@ -20,6 +24,13 @@ function emitBoolean(nullable: boolean): Nullable<BooleanTypeAnnotation> {
   });
 }
 
+function emitInt32(nullable: boolean): Nullable<Int32TypeAnnotation> {
+  return wrapNullable(nullable, {
+    type: 'Int32TypeAnnotation',
+  });
+}
+
 module.exports = {
   emitBoolean,
+  emitInt32,
 };

packages/react-native-codegen/src/parsers/typescript/modules/index.js

@@ -33,7 +33,7 @@ const {
   isModuleRegistryCall,
 } = require('../utils.js');
 const {unwrapNullable, wrapNullable} = require('../../parsers-commons');
-const {emitBoolean} = require('../../parsers-primitives');
+const {emitBoolean, emitInt32} = require('../../parsers-primitives');
 const {
   IncorrectlyParameterizedTypeScriptGenericParserError,
   MisnamedModuleTypeScriptInterfaceParserError,
@@ -228,9 +228,7 @@ function translateTypeAnnotation(
           });
         }
         case 'Int32': {
-          return wrapNullable(nullable, {
-            type: 'Int32TypeAnnotation',
-          });
+          return emitInt32(nullable);
         }
         case 'Double': {
           return wrapNullable(nullable, {