refactor(ivy): refactor more files in DI to prepare it for bazel packages (#28098)

PR Close #28098

packages/core/src/di/jit/environment.ts

@@ -0,0 +1,33 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {Type} from '../../interface/type';
+import {inject} from '../injector_compatibility';
+import {defineInjectable, defineInjector, getInjectableDef, getInjectorDef} from '../interface/defs';
+
+
+/**
+ * A mapping of the @angular/core API surface used in generated expressions to the actual symbols.
+ *
+ * This should be kept up to date with the public exports of @angular/core.
+ */
+export const angularCoreDiEnv: {[name: string]: Function} = {
+  'defineInjectable': defineInjectable,
+  'defineInjector': defineInjector,
+  'inject': inject,
+  'ɵgetFactoryOf': getFactoryOf,
+};
+
+function getFactoryOf<T>(type: Type<any>): ((type: Type<T>| null) => T)|null {
+  const typeAny = type as any;
+  const def = getInjectableDef<T>(typeAny) || getInjectorDef<T>(typeAny);
+  if (!def || def.factory === undefined) {
+    return null;
+  }
+  return def.factory;
+}

packages/core/src/di/jit/injectable.ts

@@ -0,0 +1,100 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {R3InjectableMetadataFacade, getCompilerFacade} from '../../compiler/compiler_facade';
+import {Type} from '../../interface/type';
+import {getClosureSafeProperty} from '../../util/property';
+import {Injectable} from '../injectable';
+import {NG_INJECTABLE_DEF} from '../interface/defs';
+import {ClassSansProvider, ExistingSansProvider, FactorySansProvider, ValueProvider, ValueSansProvider} from '../interface/provider';
+
+import {angularCoreDiEnv} from './environment';
+import {convertDependencies, reflectDependencies} from './util';
+
+
+
+/**
+ * Compile an Angular injectable according to its `Injectable` metadata, and patch the resulting
+ * `ngInjectableDef` onto the injectable type.
+ */
+export function compileInjectable(type: Type<any>, srcMeta?: Injectable): void {
+  let def: any = null;
+
+  // if NG_INJECTABLE_DEF is already defined on this class then don't overwrite it
+  if (type.hasOwnProperty(NG_INJECTABLE_DEF)) return;
+
+  Object.defineProperty(type, NG_INJECTABLE_DEF, {
+    get: () => {
+      if (def === null) {
+        // Allow the compilation of a class with a `@Injectable()` decorator without parameters
+        const meta: Injectable = srcMeta || {providedIn: null};
+        const hasAProvider = isUseClassProvider(meta) || isUseFactoryProvider(meta) ||
+            isUseValueProvider(meta) || isUseExistingProvider(meta);
+
+
+        const compilerMeta: R3InjectableMetadataFacade = {
+          name: type.name,
+          type: type,
+          typeArgumentCount: 0,
+          providedIn: meta.providedIn,
+          ctorDeps: reflectDependencies(type),
+          userDeps: undefined
+        };
+        if ((isUseClassProvider(meta) || isUseFactoryProvider(meta)) && meta.deps !== undefined) {
+          compilerMeta.userDeps = convertDependencies(meta.deps);
+        }
+        if (!hasAProvider) {
+          // In the case the user specifies a type provider, treat it as {provide: X, useClass: X}.
+          // The deps will have been reflected above, causing the factory to create the class by
+          // calling
+          // its constructor with injected deps.
+          compilerMeta.useClass = type;
+        } else if (isUseClassProvider(meta)) {
+          // The user explicitly specified useClass, and may or may not have provided deps.
+          compilerMeta.useClass = meta.useClass;
+        } else if (isUseValueProvider(meta)) {
+          // The user explicitly specified useValue.
+          compilerMeta.useValue = meta.useValue;
+        } else if (isUseFactoryProvider(meta)) {
+          // The user explicitly specified useFactory.
+          compilerMeta.useFactory = meta.useFactory;
+        } else if (isUseExistingProvider(meta)) {
+          // The user explicitly specified useExisting.
+          compilerMeta.useExisting = meta.useExisting;
+        } else {
+          // Can't happen - either hasAProvider will be false, or one of the providers will be set.
+          throw new Error(`Unreachable state.`);
+        }
+        def = getCompilerFacade().compileInjectable(
+            angularCoreDiEnv, `ng://${type.name}/ngInjectableDef.js`, compilerMeta);
+      }
+      return def;
+    },
+  });
+}
+
+type UseClassProvider = Injectable & ClassSansProvider & {deps?: any[]};
+
+const USE_VALUE =
+    getClosureSafeProperty<ValueProvider>({provide: String, useValue: getClosureSafeProperty});
+
+function isUseClassProvider(meta: Injectable): meta is UseClassProvider {
+  return (meta as UseClassProvider).useClass !== undefined;
+}
+
+function isUseValueProvider(meta: Injectable): meta is Injectable&ValueSansProvider {
+  return USE_VALUE in meta;
+}
+
+function isUseFactoryProvider(meta: Injectable): meta is Injectable&FactorySansProvider {
+  return (meta as FactorySansProvider).useFactory !== undefined;
+}
+
+function isUseExistingProvider(meta: Injectable): meta is Injectable&ExistingSansProvider {
+  return (meta as ExistingSansProvider).useExisting !== undefined;
+}

packages/core/src/di/jit/util.ts

@@ -0,0 +1,77 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {CompilerFacade, R3DependencyMetadataFacade, getCompilerFacade} from '../../compiler/compiler_facade';
+import {Type} from '../../interface/type';
+import {ReflectionCapabilities} from '../../reflection/reflection_capabilities';
+import {Attribute, Host, Inject, Optional, Self, SkipSelf} from '../metadata';
+
+let _reflect: ReflectionCapabilities|null = null;
+
+export function getReflect(): ReflectionCapabilities {
+  return (_reflect = _reflect || new ReflectionCapabilities());
+}
+
+export function reflectDependencies(type: Type<any>): R3DependencyMetadataFacade[] {
+  return convertDependencies(getReflect().parameters(type));
+}
+
+export function convertDependencies(deps: any[]): R3DependencyMetadataFacade[] {
+  const compiler = getCompilerFacade();
+  return deps.map(dep => reflectDependency(compiler, dep));
+}
+
+function reflectDependency(compiler: CompilerFacade, dep: any | any[]): R3DependencyMetadataFacade {
+  const meta: R3DependencyMetadataFacade = {
+    token: null,
+    host: false,
+    optional: false,
+    resolved: compiler.R3ResolvedDependencyType.Token,
+    self: false,
+    skipSelf: false,
+  };
+
+  function setTokenAndResolvedType(token: any): void {
+    meta.resolved = compiler.R3ResolvedDependencyType.Token;
+    meta.token = token;
+  }
+
+  if (Array.isArray(dep)) {
+    if (dep.length === 0) {
+      throw new Error('Dependency array must have arguments.');
+    }
+    for (let j = 0; j < dep.length; j++) {
+      const param = dep[j];
+      if (param === undefined) {
+        // param may be undefined if type of dep is not set by ngtsc
+        continue;
+      } else if (param instanceof Optional || param.__proto__.ngMetadataName === 'Optional') {
+        meta.optional = true;
+      } else if (param instanceof SkipSelf || param.__proto__.ngMetadataName === 'SkipSelf') {
+        meta.skipSelf = true;
+      } else if (param instanceof Self || param.__proto__.ngMetadataName === 'Self') {
+        meta.self = true;
+      } else if (param instanceof Host || param.__proto__.ngMetadataName === 'Host') {
+        meta.host = true;
+      } else if (param instanceof Inject) {
+        meta.token = param.token;
+      } else if (param instanceof Attribute) {
+        if (param.attributeName === undefined) {
+          throw new Error(`Attribute name must be defined.`);
+        }
+        meta.token = param.attributeName;
+        meta.resolved = compiler.R3ResolvedDependencyType.Attribute;
+      } else {
+        setTokenAndResolvedType(param);
+      }
+    }
+  } else {
+    setTokenAndResolvedType(dep);
+  }
+  return meta;
+}