✨Add support to TSImportType

src/metadata/serializeType.ts

@@ -84,6 +84,36 @@ function serializeTypeReferenceNode(
   );
 }
 
+function serializeTypeImportNode(
+  className: string,
+  node: t.TSImportType
+) {
+  /**
+   * We need to save references to this type since it is going
+   * to be used as a Value (and not just as a Type) here.
+   *
+   * This is resolved in main plugin method, calling
+   * `path.scope.crawl()` which updates the bindings.
+   */
+  const reference = serializeReference(node.qualifier!);
+
+  /**
+   * We don't know if type is just a type (interface, etc.) or a concrete
+   * value (class, etc.).
+   * `typeof` operator allows us to use the expression even if it is not
+   * defined, fallback is just `Object`.
+   */
+  return t.conditionalExpression(
+    t.binaryExpression(
+      '===',
+      t.unaryExpression('typeof', reference),
+      t.stringLiteral('undefined')
+    ),
+    t.identifier('Object'),
+    t.clone(reference)
+  );
+}
+
 /**
  * Checks if node (this should be the result of `serializeReference`) member
  * expression or identifier is a reference to self (class name).
@@ -193,6 +223,9 @@ function serializeTypeNode(className: string, node: t.TSType): SerializedType {
     case 'TSConditionalType':
       return serializeTypeList(className, [node.trueType, node.falseType]);
 
+    case 'TSImportType':
+      return serializeTypeImportNode(className, node);
+
     case 'TSTypeQuery':
     case 'TSTypeOperator':
     case 'TSIndexedAccessType':

test/__fixtures__/nest-injection/code.js

@@ -10,6 +10,9 @@ export class AppController {
   @Inject()
   private appService2: AppService;
 
+  @Inject()
+  private appService3: import('./app.service').AppService;
+
   @Get()
   getHello(): string {
     return this.appService.getHello();

test/__fixtures__/nest-injection/output.js

@@ -1,4 +1,4 @@
-var _dec, _dec2, _dec3, _dec4, _dec5, _dec6, _dec7, _dec8, _class, _class2, _descriptor, _descriptor2, _temp;
+var _dec, _dec2, _dec3, _dec4, _dec5, _dec6, _dec7, _dec8, _dec9, _dec10, _class, _class2, _descriptor, _descriptor2, _descriptor3, _temp;
 
 function _initializerDefineProperty(target, property, descriptor, context) { if (!descriptor) return; Object.defineProperty(target, property, { enumerable: descriptor.enumerable, configurable: descriptor.configurable, writable: descriptor.writable, value: descriptor.initializer ? descriptor.initializer.call(context) : void 0 }); }
 
@@ -7,13 +7,15 @@ function _applyDecoratedDescriptor(target, property, decorators, descriptor, con
 function _initializerWarningHelper(descriptor, context) { throw new Error('Decorating class property failed. Please ensure that ' + 'proposal-class-properties is enabled and set to use loose mode. ' + 'To use proposal-class-properties in spec mode with decorators, wait for ' + 'the next major version of decorators in stage 2.'); }
 
 import { AppService } from './app.service';
-export let AppController = (_dec = Controller(), _dec2 = Reflect.metadata("design:paramtypes", [typeof AppService === "undefined" ? Object : AppService]), _dec3 = Inject(), _dec4 = Reflect.metadata("design:type", typeof AppService === "undefined" ? Object : AppService), _dec5 = Inject(), _dec6 = Reflect.metadata("design:type", typeof AppService === "undefined" ? Object : AppService), _dec7 = Get(), _dec8 = Reflect.metadata("design:paramtypes", []), _dec(_class = _dec2(_class = (_class2 = (_temp = class AppController {
+export let AppController = (_dec = Controller(), _dec2 = Reflect.metadata("design:paramtypes", [typeof AppService === "undefined" ? Object : AppService]), _dec3 = Inject(), _dec4 = Reflect.metadata("design:type", typeof AppService === "undefined" ? Object : AppService), _dec5 = Inject(), _dec6 = Reflect.metadata("design:type", typeof AppService === "undefined" ? Object : AppService), _dec7 = Inject(), _dec8 = Reflect.metadata("design:type", typeof AppService === "undefined" ? Object : AppService), _dec9 = Get(), _dec10 = Reflect.metadata("design:paramtypes", []), _dec(_class = _dec2(_class = (_class2 = (_temp = class AppController {
   constructor(appService) {
     this.appService = appService;
 
     _initializerDefineProperty(this, "appService", _descriptor, this);
 
     _initializerDefineProperty(this, "appService2", _descriptor2, this);
+
+    _initializerDefineProperty(this, "appService3", _descriptor3, this);
   }
 
   getHello() {
@@ -30,4 +32,9 @@ export let AppController = (_dec = Controller(), _dec2 = Reflect.metadata("desig
   enumerable: true,
   writable: true,
   initializer: null
-}), _applyDecoratedDescriptor(_class2.prototype, "getHello", [_dec7, _dec8], Object.getOwnPropertyDescriptor(_class2.prototype, "getHello"), _class2.prototype)), _class2)) || _class) || _class);
+}), _descriptor3 = _applyDecoratedDescriptor(_class2.prototype, "appService3", [_dec7, _dec8], {
+  configurable: true,
+  enumerable: true,
+  writable: true,
+  initializer: null
+}), _applyDecoratedDescriptor(_class2.prototype, "getHello", [_dec9, _dec10], Object.getOwnPropertyDescriptor(_class2.prototype, "getHello"), _class2.prototype)), _class2)) || _class) || _class);