Codegen 106: add enumDeclaration property in parser class (#37355)

Summary:
Part of Codegen Issue: #34872

> Add a enumDeclaration: string property to the Parser class. Implement it in the Flow parser so that it returns EnumDeclaration and in the TypeScriptParser so that it returns TSEnumDeclaration. Replace the case in the switch  in the [parsers/flow/utils.js](https://github.com/facebook/react-native/blob/e133100721939108b0f28dfa9f60ac627c804018/packages/react-native-codegen/src/parsers/flow/utils.js#L66) and [parsers/typescript/utils.js](https://github.com/facebook/react-native/blob/e133100721939108b0f28dfa9f60ac627c804018/packages/react-native-codegen/src/parsers/typescript/utils.js#L78) with this prop.

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[Internal][Added] - Add enumDeclaration property in parser class

Pull Request resolved: #37355

Test Plan: ```yarn test```

Reviewed By: christophpurrer

Differential Revision: D45736088

Pulled By: cipolleschi

fbshipit-source-id: 706a9f1fff52563e12dd6fc54cb0e89c396bba7c

Author: tarunrajput

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

@@ -311,6 +311,12 @@ describe('FlowParser', () => {
       expect(parser.typeAlias).toEqual('TypeAlias');
     });
   });
+
+  describe('enumDeclaration', () => {
+    it('returns enumDeclaration Property', () => {
+      expect(parser.enumDeclaration).toEqual('EnumDeclaration');
+    });
+  });
 });
 
 describe('TypeScriptParser', () => {
@@ -594,4 +600,10 @@ describe('TypeScriptParser', () => {
       expect(parser.typeAlias).toEqual('TSTypeAliasDeclaration');
     });
   });
+
+  describe('enumDeclaration', () => {
+    it('returns enumDeclaration Property', () => {
+      expect(parser.enumDeclaration).toEqual('TSEnumDeclaration');
+    });
+  });
 });

packages/react-native-codegen/src/parsers/flow/parser.js

@@ -63,6 +63,7 @@ const {
 class FlowParser implements Parser {
   typeParameterInstantiation: string = 'TypeParameterInstantiation';
   typeAlias: string = 'TypeAlias';
+  enumDeclaration: string = 'EnumDeclaration';
 
   isProperty(property: $FlowFixMe): boolean {
     return property.type === 'ObjectTypeProperty';

packages/react-native-codegen/src/parsers/flow/utils.js

@@ -62,7 +62,7 @@ function resolveTypeAnnotation(
         node = resolvedTypeAnnotation.right;
         break;
       }
-      case 'EnumDeclaration': {
+      case parser.enumDeclaration: {
         typeResolutionStatus = {
           successful: true,
           type: 'enum',
@@ -73,7 +73,7 @@ function resolveTypeAnnotation(
       }
       default: {
         throw new TypeError(
-          `A non GenericTypeAnnotation must be a type declaration ('${parser.typeAlias}') or enum ('EnumDeclaration'). Instead, got the unsupported ${resolvedTypeAnnotation.type}.`,
+          `A non GenericTypeAnnotation must be a type declaration ('${parser.typeAlias}') or enum ('${parser.enumDeclaration}'). Instead, got the unsupported ${resolvedTypeAnnotation.type}.`,
         );
       }
     }

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

@@ -88,6 +88,11 @@ export interface Parser {
    */
   typeAlias: string;
 
+  /**
+   * enumDeclaration Property of the Parser
+   */
+  enumDeclaration: string;
+
   /**
    * Given a declaration, it returns true if it is a property
    */

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

@@ -61,6 +61,7 @@ const schemaMock = {
 export class MockedParser implements Parser {
   typeParameterInstantiation: string = 'TypeParameterInstantiation';
   typeAlias: string = 'TypeAlias';
+  enumDeclaration: string = 'EnumDeclaration';
 
   isProperty(property: $FlowFixMe): boolean {
     return property.type === 'ObjectTypeProperty';

packages/react-native-codegen/src/parsers/typescript/parser.js

@@ -61,6 +61,7 @@ const {
 class TypeScriptParser implements Parser {
   typeParameterInstantiation: string = 'TSTypeParameterInstantiation';
   typeAlias: string = 'TSTypeAliasDeclaration';
+  enumDeclaration: string = 'TSEnumDeclaration';
 
   isProperty(property: $FlowFixMe): boolean {
     return property.type === 'TSPropertySignature';

packages/react-native-codegen/src/parsers/typescript/utils.js

@@ -76,7 +76,7 @@ function resolveTypeAnnotation(
         node = resolvedTypeAnnotation;
         break;
       }
-      case 'TSEnumDeclaration': {
+      case parser.enumDeclaration: {
         typeResolutionStatus = {
           successful: true,
           type: 'enum',
@@ -87,7 +87,7 @@ function resolveTypeAnnotation(
       }
       default: {
         throw new TypeError(
-          `A non GenericTypeAnnotation must be a type declaration ('${parser.typeAlias}'), an interface ('TSInterfaceDeclaration'), or enum ('TSEnumDeclaration'). Instead, got the unsupported ${resolvedTypeAnnotation.type}.`,
+          `A non GenericTypeAnnotation must be a type declaration ('${parser.typeAlias}'), an interface ('TSInterfaceDeclaration'), or enum ('${parser.enumDeclaration}'). Instead, got the unsupported ${resolvedTypeAnnotation.type}.`,
         );
       }
     }