@angular/core
Version:
Angular - the core framework
280 lines • 39.8 kB
JavaScript
/**
* @license
* Copyright Google LLC 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 { RuntimeError } from '../errors';
import { getComponentDef } from '../render3/definition';
import { getFactoryDef } from '../render3/definition_factory';
import { throwCyclicDependencyError, throwInvalidProviderError } from '../render3/errors_di';
import { stringifyForError } from '../render3/util/stringify_utils';
import { deepForEach } from '../util/array_utils';
import { EMPTY_ARRAY } from '../util/empty';
import { getClosureSafeProperty } from '../util/property';
import { stringify } from '../util/stringify';
import { resolveForwardRef } from './forward_ref';
import { ENVIRONMENT_INITIALIZER } from './initializer_token';
import { ɵɵinject as inject } from './injector_compatibility';
import { getInjectorDef } from './interface/defs';
import { isEnvironmentProviders } from './interface/provider';
import { INJECTOR_DEF_TYPES } from './internal_tokens';
/**
* Wrap an array of `Provider`s into `EnvironmentProviders`, preventing them from being accidentally
* referenced in `@Component` in a component injector.
*/
export function makeEnvironmentProviders(providers) {
return {
ɵproviders: providers,
};
}
/**
* Collects providers from all NgModules and standalone components, including transitively imported
* ones.
*
* Providers extracted via `importProvidersFrom` are only usable in an application injector or
* another environment injector (such as a route injector). They should not be used in component
* providers.
*
* More information about standalone components can be found in [this
* guide](guide/standalone-components).
*
* @usageNotes
* The results of the `importProvidersFrom` call can be used in the `bootstrapApplication` call:
*
* ```typescript
* await bootstrapApplication(RootComponent, {
* providers: [
* importProvidersFrom(NgModuleOne, NgModuleTwo)
* ]
* });
* ```
*
* You can also use the `importProvidersFrom` results in the `providers` field of a route, when a
* standalone component is used:
*
* ```typescript
* export const ROUTES: Route[] = [
* {
* path: 'foo',
* providers: [
* importProvidersFrom(NgModuleOne, NgModuleTwo)
* ],
* component: YourStandaloneComponent
* }
* ];
* ```
*
* @returns Collected providers from the specified list of types.
* @publicApi
*/
export function importProvidersFrom(...sources) {
return {
ɵproviders: internalImportProvidersFrom(true, sources),
ɵfromNgModule: true,
};
}
export function internalImportProvidersFrom(checkForStandaloneCmp, ...sources) {
const providersOut = [];
const dedup = new Set(); // already seen types
let injectorTypesWithProviders;
const collectProviders = (provider) => {
providersOut.push(provider);
};
deepForEach(sources, source => {
if ((typeof ngDevMode === 'undefined' || ngDevMode) && checkForStandaloneCmp) {
const cmpDef = getComponentDef(source);
if (cmpDef?.standalone) {
throw new RuntimeError(800 /* RuntimeErrorCode.IMPORT_PROVIDERS_FROM_STANDALONE */, `Importing providers supports NgModule or ModuleWithProviders but got a standalone component "${stringifyForError(source)}"`);
}
}
// Narrow `source` to access the internal type analogue for `ModuleWithProviders`.
const internalSource = source;
if (walkProviderTree(internalSource, collectProviders, [], dedup)) {
injectorTypesWithProviders ||= [];
injectorTypesWithProviders.push(internalSource);
}
});
// Collect all providers from `ModuleWithProviders` types.
if (injectorTypesWithProviders !== undefined) {
processInjectorTypesWithProviders(injectorTypesWithProviders, collectProviders);
}
return providersOut;
}
/**
* Collects all providers from the list of `ModuleWithProviders` and appends them to the provided
* array.
*/
function processInjectorTypesWithProviders(typesWithProviders, visitor) {
for (let i = 0; i < typesWithProviders.length; i++) {
const { ngModule, providers } = typesWithProviders[i];
deepForEachProvider(providers, provider => {
ngDevMode && validateProvider(provider, providers || EMPTY_ARRAY, ngModule);
visitor(provider, ngModule);
});
}
}
/**
* The logic visits an `InjectorType`, an `InjectorTypeWithProviders`, or a standalone
* `ComponentType`, and all of its transitive providers and collects providers.
*
* If an `InjectorTypeWithProviders` that declares providers besides the type is specified,
* the function will return "true" to indicate that the providers of the type definition need
* to be processed. This allows us to process providers of injector types after all imports of
* an injector definition are processed. (following View Engine semantics: see FW-1349)
*/
export function walkProviderTree(container, visitor, parents, dedup) {
container = resolveForwardRef(container);
if (!container)
return false;
// The actual type which had the definition. Usually `container`, but may be an unwrapped type
// from `InjectorTypeWithProviders`.
let defType = null;
let injDef = getInjectorDef(container);
const cmpDef = !injDef && getComponentDef(container);
if (!injDef && !cmpDef) {
// `container` is not an injector type or a component type. It might be:
// * An `InjectorTypeWithProviders` that wraps an injector type.
// * A standalone directive or pipe that got pulled in from a standalone component's
// dependencies.
// Try to unwrap it as an `InjectorTypeWithProviders` first.
const ngModule = container.ngModule;
injDef = getInjectorDef(ngModule);
if (injDef) {
defType = ngModule;
}
else {
// Not a component or injector type, so ignore it.
return false;
}
}
else if (cmpDef && !cmpDef.standalone) {
return false;
}
else {
defType = container;
}
// Check for circular dependencies.
if (ngDevMode && parents.indexOf(defType) !== -1) {
const defName = stringify(defType);
const path = parents.map(stringify);
throwCyclicDependencyError(defName, path);
}
// Check for multiple imports of the same module
const isDuplicate = dedup.has(defType);
if (cmpDef) {
if (isDuplicate) {
// This component definition has already been processed.
return false;
}
dedup.add(defType);
if (cmpDef.dependencies) {
const deps = typeof cmpDef.dependencies === 'function' ? cmpDef.dependencies() : cmpDef.dependencies;
for (const dep of deps) {
walkProviderTree(dep, visitor, parents, dedup);
}
}
}
else if (injDef) {
// First, include providers from any imports.
if (injDef.imports != null && !isDuplicate) {
// Before processing defType's imports, add it to the set of parents. This way, if it ends
// up deeply importing itself, this can be detected.
ngDevMode && parents.push(defType);
// Add it to the set of dedups. This way we can detect multiple imports of the same module
dedup.add(defType);
let importTypesWithProviders;
try {
deepForEach(injDef.imports, imported => {
if (walkProviderTree(imported, visitor, parents, dedup)) {
importTypesWithProviders ||= [];
// If the processed import is an injector type with providers, we store it in the
// list of import types with providers, so that we can process those afterwards.
importTypesWithProviders.push(imported);
}
});
}
finally {
// Remove it from the parents set when finished.
ngDevMode && parents.pop();
}
// Imports which are declared with providers (TypeWithProviders) need to be processed
// after all imported modules are processed. This is similar to how View Engine
// processes/merges module imports in the metadata resolver. See: FW-1349.
if (importTypesWithProviders !== undefined) {
processInjectorTypesWithProviders(importTypesWithProviders, visitor);
}
}
if (!isDuplicate) {
// Track the InjectorType and add a provider for it.
// It's important that this is done after the def's imports.
const factory = getFactoryDef(defType) || (() => new defType());
// Append extra providers to make more info available for consumers (to retrieve an injector
// type), as well as internally (to calculate an injection scope correctly and eagerly
// instantiate a `defType` when an injector is created).
// Provider to create `defType` using its factory.
visitor({ provide: defType, useFactory: factory, deps: EMPTY_ARRAY }, defType);
// Make this `defType` available to an internal logic that calculates injector scope.
visitor({ provide: INJECTOR_DEF_TYPES, useValue: defType, multi: true }, defType);
// Provider to eagerly instantiate `defType` via `INJECTOR_INITIALIZER`.
visitor({ provide: ENVIRONMENT_INITIALIZER, useValue: () => inject(defType), multi: true }, defType);
}
// Next, include providers listed on the definition itself.
const defProviders = injDef.providers;
if (defProviders != null && !isDuplicate) {
const injectorType = container;
deepForEachProvider(defProviders, provider => {
ngDevMode && validateProvider(provider, defProviders, injectorType);
visitor(provider, injectorType);
});
}
}
else {
// Should not happen, but just in case.
return false;
}
return (defType !== container &&
container.providers !== undefined);
}
function validateProvider(provider, providers, containerType) {
if (isTypeProvider(provider) || isValueProvider(provider) || isFactoryProvider(provider) ||
isExistingProvider(provider)) {
return;
}
// Here we expect the provider to be a `useClass` provider (by elimination).
const classRef = resolveForwardRef(provider && (provider.useClass || provider.provide));
if (!classRef) {
throwInvalidProviderError(containerType, providers, provider);
}
}
function deepForEachProvider(providers, fn) {
for (let provider of providers) {
if (isEnvironmentProviders(provider)) {
provider = provider.ɵproviders;
}
if (Array.isArray(provider)) {
deepForEachProvider(provider, fn);
}
else {
fn(provider);
}
}
}
export const USE_VALUE = getClosureSafeProperty({ provide: String, useValue: getClosureSafeProperty });
export function isValueProvider(value) {
return value !== null && typeof value == 'object' && USE_VALUE in value;
}
export function isExistingProvider(value) {
return !!(value && value.useExisting);
}
export function isFactoryProvider(value) {
return !!(value && value.useFactory);
}
export function isTypeProvider(value) {
return typeof value === 'function';
}
export function isClassProvider(value) {
return !!value.useClass;
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {RuntimeError, RuntimeErrorCode} from '../errors';\nimport {Type} from '../interface/type';\nimport {getComponentDef} from '../render3/definition';\nimport {getFactoryDef} from '../render3/definition_factory';\nimport {throwCyclicDependencyError, throwInvalidProviderError} from '../render3/errors_di';\nimport {stringifyForError} from '../render3/util/stringify_utils';\nimport {deepForEach} from '../util/array_utils';\nimport {EMPTY_ARRAY} from '../util/empty';\nimport {getClosureSafeProperty} from '../util/property';\nimport {stringify} from '../util/stringify';\n\nimport {resolveForwardRef} from './forward_ref';\nimport {ENVIRONMENT_INITIALIZER} from './initializer_token';\nimport {ɵɵinject as inject} from './injector_compatibility';\nimport {getInjectorDef, InjectorType, InjectorTypeWithProviders} from './interface/defs';\nimport {ClassProvider, ConstructorProvider, EnvironmentProviders, ExistingProvider, FactoryProvider, ImportedNgModuleProviders, InternalEnvironmentProviders, isEnvironmentProviders, ModuleWithProviders, Provider, StaticClassProvider, TypeProvider, ValueProvider} from './interface/provider';\nimport {INJECTOR_DEF_TYPES} from './internal_tokens';\n\n/**\n * Wrap an array of `Provider`s into `EnvironmentProviders`, preventing them from being accidentally\n * referenced in `@Component` in a component injector.\n */\nexport function makeEnvironmentProviders(providers: (Provider|EnvironmentProviders)[]):\n    EnvironmentProviders {\n  return {\n    ɵproviders: providers,\n  } as unknown as EnvironmentProviders;\n}\n\n/**\n * A source of providers for the `importProvidersFrom` function.\n *\n * @publicApi\n */\nexport type ImportProvidersSource =\n    Type<unknown>|ModuleWithProviders<unknown>|Array<ImportProvidersSource>;\n\ntype WalkProviderTreeVisitor =\n    (provider: SingleProvider, container: Type<unknown>|InjectorType<unknown>) => void;\n\n/**\n * Collects providers from all NgModules and standalone components, including transitively imported\n * ones.\n *\n * Providers extracted via `importProvidersFrom` are only usable in an application injector or\n * another environment injector (such as a route injector). They should not be used in component\n * providers.\n *\n * More information about standalone components can be found in [this\n * guide](guide/standalone-components).\n *\n * @usageNotes\n * The results of the `importProvidersFrom` call can be used in the `bootstrapApplication` call:\n *\n * ```typescript\n * await bootstrapApplication(RootComponent, {\n *   providers: [\n *     importProvidersFrom(NgModuleOne, NgModuleTwo)\n *   ]\n * });\n * ```\n *\n * You can also use the `importProvidersFrom` results in the `providers` field of a route, when a\n * standalone component is used:\n *\n * ```typescript\n * export const ROUTES: Route[] = [\n *   {\n *     path: 'foo',\n *     providers: [\n *       importProvidersFrom(NgModuleOne, NgModuleTwo)\n *     ],\n *     component: YourStandaloneComponent\n *   }\n * ];\n * ```\n *\n * @returns Collected providers from the specified list of types.\n * @publicApi\n */\nexport function importProvidersFrom(...sources: ImportProvidersSource[]): EnvironmentProviders {\n  return {\n    ɵproviders: internalImportProvidersFrom(true, sources),\n    ɵfromNgModule: true,\n  } as InternalEnvironmentProviders;\n}\n\nexport function internalImportProvidersFrom(\n    checkForStandaloneCmp: boolean, ...sources: ImportProvidersSource[]): Provider[] {\n  const providersOut: SingleProvider[] = [];\n  const dedup = new Set<Type<unknown>>();  // already seen types\n  let injectorTypesWithProviders: InjectorTypeWithProviders<unknown>[]|undefined;\n\n  const collectProviders: WalkProviderTreeVisitor = (provider) => {\n    providersOut.push(provider);\n  };\n\n  deepForEach(sources, source => {\n    if ((typeof ngDevMode === 'undefined' || ngDevMode) && checkForStandaloneCmp) {\n      const cmpDef = getComponentDef(source);\n      if (cmpDef?.standalone) {\n        throw new RuntimeError(\n            RuntimeErrorCode.IMPORT_PROVIDERS_FROM_STANDALONE,\n            `Importing providers supports NgModule or ModuleWithProviders but got a standalone component \"${\n                stringifyForError(source)}\"`);\n      }\n    }\n\n    // Narrow `source` to access the internal type analogue for `ModuleWithProviders`.\n    const internalSource = source as Type<unknown>| InjectorTypeWithProviders<unknown>;\n    if (walkProviderTree(internalSource, collectProviders, [], dedup)) {\n      injectorTypesWithProviders ||= [];\n      injectorTypesWithProviders.push(internalSource);\n    }\n  });\n  // Collect all providers from `ModuleWithProviders` types.\n  if (injectorTypesWithProviders !== undefined) {\n    processInjectorTypesWithProviders(injectorTypesWithProviders, collectProviders);\n  }\n\n  return providersOut;\n}\n\n/**\n * Collects all providers from the list of `ModuleWithProviders` and appends them to the provided\n * array.\n */\nfunction processInjectorTypesWithProviders(\n    typesWithProviders: InjectorTypeWithProviders<unknown>[],\n    visitor: WalkProviderTreeVisitor): void {\n  for (let i = 0; i < typesWithProviders.length; i++) {\n    const {ngModule, providers} = typesWithProviders[i];\n    deepForEachProvider(providers! as Array<Provider|InternalEnvironmentProviders>, provider => {\n      ngDevMode && validateProvider(provider, providers || EMPTY_ARRAY, ngModule);\n      visitor(provider, ngModule);\n    });\n  }\n}\n\n/**\n * Internal type for a single provider in a deep provider array.\n */\nexport type SingleProvider = TypeProvider|ValueProvider|ClassProvider|ConstructorProvider|\n    ExistingProvider|FactoryProvider|StaticClassProvider;\n\n/**\n * The logic visits an `InjectorType`, an `InjectorTypeWithProviders`, or a standalone\n * `ComponentType`, and all of its transitive providers and collects providers.\n *\n * If an `InjectorTypeWithProviders` that declares providers besides the type is specified,\n * the function will return \"true\" to indicate that the providers of the type definition need\n * to be processed. This allows us to process providers of injector types after all imports of\n * an injector definition are processed. (following View Engine semantics: see FW-1349)\n */\nexport function walkProviderTree(\n    container: Type<unknown>|InjectorTypeWithProviders<unknown>, visitor: WalkProviderTreeVisitor,\n    parents: Type<unknown>[],\n    dedup: Set<Type<unknown>>): container is InjectorTypeWithProviders<unknown> {\n  container = resolveForwardRef(container);\n  if (!container) return false;\n\n  // The actual type which had the definition. Usually `container`, but may be an unwrapped type\n  // from `InjectorTypeWithProviders`.\n  let defType: Type<unknown>|null = null;\n\n  let injDef = getInjectorDef(container);\n  const cmpDef = !injDef && getComponentDef(container);\n  if (!injDef && !cmpDef) {\n    // `container` is not an injector type or a component type. It might be:\n    //  * An `InjectorTypeWithProviders` that wraps an injector type.\n    //  * A standalone directive or pipe that got pulled in from a standalone component's\n    //    dependencies.\n    // Try to unwrap it as an `InjectorTypeWithProviders` first.\n    const ngModule: Type<unknown>|undefined =\n        (container as InjectorTypeWithProviders<any>).ngModule as Type<unknown>| undefined;\n    injDef = getInjectorDef(ngModule);\n    if (injDef) {\n      defType = ngModule!;\n    } else {\n      // Not a component or injector type, so ignore it.\n      return false;\n    }\n  } else if (cmpDef && !cmpDef.standalone) {\n    return false;\n  } else {\n    defType = container as Type<unknown>;\n  }\n\n  // Check for circular dependencies.\n  if (ngDevMode && parents.indexOf(defType) !== -1) {\n    const defName = stringify(defType);\n    const path = parents.map(stringify);\n    throwCyclicDependencyError(defName, path);\n  }\n\n  // Check for multiple imports of the same module\n  const isDuplicate = dedup.has(defType);\n\n  if (cmpDef) {\n    if (isDuplicate) {\n      // This component definition has already been processed.\n      return false;\n    }\n    dedup.add(defType);\n\n    if (cmpDef.dependencies) {\n      const deps =\n          typeof cmpDef.dependencies === 'function' ? cmpDef.dependencies() : cmpDef.dependencies;\n      for (const dep of deps) {\n        walkProviderTree(dep, visitor, parents, dedup);\n      }\n    }\n  } else if (injDef) {\n    // First, include providers from any imports.\n    if (injDef.imports != null && !isDuplicate) {\n      // Before processing defType's imports, add it to the set of parents. This way, if it ends\n      // up deeply importing itself, this can be detected.\n      ngDevMode && parents.push(defType);\n      // Add it to the set of dedups. This way we can detect multiple imports of the same module\n      dedup.add(defType);\n\n      let importTypesWithProviders: (InjectorTypeWithProviders<any>[])|undefined;\n      try {\n        deepForEach(injDef.imports, imported => {\n          if (walkProviderTree(imported, visitor, parents, dedup)) {\n            importTypesWithProviders ||= [];\n            // If the processed import is an injector type with providers, we store it in the\n            // list of import types with providers, so that we can process those afterwards.\n            importTypesWithProviders.push(imported);\n          }\n        });\n      } finally {\n        // Remove it from the parents set when finished.\n        ngDevMode && parents.pop();\n      }\n\n      // Imports which are declared with providers (TypeWithProviders) need to be processed\n      // after all imported modules are processed. This is similar to how View Engine\n      // processes/merges module imports in the metadata resolver. See: FW-1349.\n      if (importTypesWithProviders !== undefined) {\n        processInjectorTypesWithProviders(importTypesWithProviders, visitor);\n      }\n    }\n\n    if (!isDuplicate) {\n      // Track the InjectorType and add a provider for it.\n      // It's important that this is done after the def's imports.\n      const factory = getFactoryDef(defType) || (() => new defType!());\n\n      // Append extra providers to make more info available for consumers (to retrieve an injector\n      // type), as well as internally (to calculate an injection scope correctly and eagerly\n      // instantiate a `defType` when an injector is created).\n\n      // Provider to create `defType` using its factory.\n      visitor({provide: defType, useFactory: factory, deps: EMPTY_ARRAY}, defType);\n\n      // Make this `defType` available to an internal logic that calculates injector scope.\n      visitor({provide: INJECTOR_DEF_TYPES, useValue: defType, multi: true}, defType);\n\n      // Provider to eagerly instantiate `defType` via `INJECTOR_INITIALIZER`.\n      visitor(\n          {provide: ENVIRONMENT_INITIALIZER, useValue: () => inject(defType!), multi: true},\n          defType);\n    }\n\n    // Next, include providers listed on the definition itself.\n    const defProviders = injDef.providers as Array<SingleProvider|InternalEnvironmentProviders>;\n    if (defProviders != null && !isDuplicate) {\n      const injectorType = container as InjectorType<any>;\n      deepForEachProvider(defProviders, provider => {\n        ngDevMode && validateProvider(provider as SingleProvider, defProviders, injectorType);\n        visitor(provider, injectorType);\n      });\n    }\n  } else {\n    // Should not happen, but just in case.\n    return false;\n  }\n\n  return (\n      defType !== container &&\n      (container as InjectorTypeWithProviders<any>).providers !== undefined);\n}\n\nfunction validateProvider(\n    provider: SingleProvider, providers: Array<SingleProvider|InternalEnvironmentProviders>,\n    containerType: Type<unknown>): void {\n  if (isTypeProvider(provider) || isValueProvider(provider) || isFactoryProvider(provider) ||\n      isExistingProvider(provider)) {\n    return;\n  }\n\n  // Here we expect the provider to be a `useClass` provider (by elimination).\n  const classRef = resolveForwardRef(\n      provider && ((provider as StaticClassProvider | ClassProvider).useClass || provider.provide));\n  if (!classRef) {\n    throwInvalidProviderError(containerType, providers, provider);\n  }\n}\n\nfunction deepForEachProvider(\n    providers: Array<Provider|InternalEnvironmentProviders>,\n    fn: (provider: SingleProvider) => void): void {\n  for (let provider of providers) {\n    if (isEnvironmentProviders(provider)) {\n      provider = provider.ɵproviders;\n    }\n    if (Array.isArray(provider)) {\n      deepForEachProvider(provider, fn);\n    } else {\n      fn(provider);\n    }\n  }\n}\n\nexport const USE_VALUE =\n    getClosureSafeProperty<ValueProvider>({provide: String, useValue: getClosureSafeProperty});\n\nexport function isValueProvider(value: SingleProvider): value is ValueProvider {\n  return value !== null && typeof value == 'object' && USE_VALUE in value;\n}\n\nexport function isExistingProvider(value: SingleProvider): value is ExistingProvider {\n  return !!(value && (value as ExistingProvider).useExisting);\n}\n\nexport function isFactoryProvider(value: SingleProvider): value is FactoryProvider {\n  return !!(value && (value as FactoryProvider).useFactory);\n}\n\nexport function isTypeProvider(value: SingleProvider): value is TypeProvider {\n  return typeof value === 'function';\n}\n\nexport function isClassProvider(value: SingleProvider): value is ClassProvider {\n  return !!(value as StaticClassProvider | ClassProvider).useClass;\n}\n"]}