From 84e311038d076251777ef617f04c5d1bf0c30ba2 Mon Sep 17 00:00:00 2001
From: Alex Rickabaugh <alx+alxhub@alxandria.net>
Date: Tue, 30 Oct 2018 10:18:30 -0700
Subject: [PATCH] feat(ivy): capture the identifier of a decorator during
 reflection (#26860)

Previously the ReflectionHost API only returned the names of decorators
and not a reference to their TypeScript Identifier. This commit adds
the identifier itself, so that a consumer can write references to the
decorator.

Testing strategy: this commit is trivial, and the functionality will be
exercised by downstream tests.

PR Close #26860
---
 packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts  | 2 ++
 packages/compiler-cli/src/ngtsc/host/src/reflection.ts    | 5 +++++
 packages/compiler-cli/src/ngtsc/metadata/src/reflector.ts | 1 +
 3 files changed, 8 insertions(+)

diff --git a/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts b/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
index 453d65b2cb..87ea6c8f4d 100644
--- a/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
+++ b/packages/compiler-cli/src/ngcc/src/host/fesm2015_host.ts
@@ -572,6 +572,7 @@ export class Fesm2015ReflectionHost extends TypeScriptReflectionHost implements
       const decoratorIdentifier = decoratorExpression;
       return {
         name: decoratorIdentifier.text,
+        identifier: decoratorIdentifier,
         import: this.getImportOfIdentifier(decoratorIdentifier),
         node: call,
         args: Array.from(call.arguments)
@@ -634,6 +635,7 @@ export class Fesm2015ReflectionHost extends TypeScriptReflectionHost implements
           if (typeIdentifier && ts.isIdentifier(typeIdentifier)) {
             decorators.push({
               name: typeIdentifier.text,
+              identifier: typeIdentifier,
               import: this.getImportOfIdentifier(typeIdentifier), node,
               args: getDecoratorArgs(node),
             });
diff --git a/packages/compiler-cli/src/ngtsc/host/src/reflection.ts b/packages/compiler-cli/src/ngtsc/host/src/reflection.ts
index 37c6e8d5e5..49722ed448 100644
--- a/packages/compiler-cli/src/ngtsc/host/src/reflection.ts
+++ b/packages/compiler-cli/src/ngtsc/host/src/reflection.ts
@@ -20,6 +20,11 @@ export interface Decorator {
    */
   name: string;
 
+  /**
+   * Identifier which refers to the decorator in source.
+   */
+  identifier: ts.Identifier;
+
   /**
    * `Import` by which the decorator was brought into the module in which it was invoked, or `null`
    * if the decorator was declared in the same module and not imported.
diff --git a/packages/compiler-cli/src/ngtsc/metadata/src/reflector.ts b/packages/compiler-cli/src/ngtsc/metadata/src/reflector.ts
index 782ae5e40c..48472794ec 100644
--- a/packages/compiler-cli/src/ngtsc/metadata/src/reflector.ts
+++ b/packages/compiler-cli/src/ngtsc/metadata/src/reflector.ts
@@ -245,6 +245,7 @@ export class TypeScriptReflectionHost implements ReflectionHost {
 
     return {
       name: decoratorExpr.text,
+      identifier: decoratorExpr,
       import: importDecl, node, args,
     };
   }