/**
 * @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 { getClosureSafeProperty } from '../../util/property';
/**
 * Construct an injectable definition which defines how a token will be constructed by the DI
 * system, and in which injectors (if any) it will be available.
 *
 * This should be assigned to a static `ɵprov` field on a type, which will then be an
 * `InjectableType`.
 *
 * Options:
 * * `providedIn` determines which injectors will include the injectable, by either associating it
 *   with an `@NgModule` or other `InjectorType`, or by specifying that this injectable should be
 *   provided in the `'root'` injector, which will be the application-level injector in most apps.
 * * `factory` gives the zero argument function which will create an instance of the injectable.
 *   The factory can call `inject` to access the `Injector` and request injection of dependencies.
 *
 * @codeGenApi
 * @publicApi This instruction has been emitted by ViewEngine for some time and is deployed to npm.
 */
export function ɵɵdefineInjectable(opts) {
    return {
        token: opts.token,
        providedIn: opts.providedIn || null,
        factory: opts.factory,
        value: undefined,
    };
}
/**
 * @deprecated in v8, delete after v10. This API should be used only by generated code, and that
 * code should now use ɵɵdefineInjectable instead.
 * @publicApi
 */
export const defineInjectable = ɵɵdefineInjectable;
/**
 * Construct an `InjectorDef` which configures an injector.
 *
 * This should be assigned to a static injector def (`ɵinj`) field on a type, which will then be an
 * `InjectorType`.
 *
 * Options:
 *
 * * `providers`: an optional array of providers to add to the injector. Each provider must
 *   either have a factory or point to a type which has a `ɵprov` static property (the
 *   type must be an `InjectableType`).
 * * `imports`: an optional array of imports of other `InjectorType`s or `InjectorTypeWithModule`s
 *   whose providers will also be added to the injector. Locally provided types will override
 *   providers from imports.
 *
 * @codeGenApi
 */
export function ɵɵdefineInjector(options) {
    return { providers: options.providers || [], imports: options.imports || [] };
}
/**
 * Read the injectable def (`ɵprov`) for `type` in a way which is immune to accidentally reading
 * inherited value.
 *
 * @param type A type which may have its own (non-inherited) `ɵprov`.
 */
export function getInjectableDef(type) {
    return getOwnDefinition(type, NG_PROV_DEF) || getOwnDefinition(type, NG_INJECTABLE_DEF);
}
export function isInjectable(type) {
    return getInjectableDef(type) !== null;
}
/**
 * Return definition only if it is defined directly on `type` and is not inherited from a base
 * class of `type`.
 */
function getOwnDefinition(type, field) {
    return type.hasOwnProperty(field) ? type[field] : null;
}
/**
 * Read the injectable def (`ɵprov`) for `type` or read the `ɵprov` from one of its ancestors.
 *
 * @param type A type which may have `ɵprov`, via inheritance.
 *
 * @deprecated Will be removed in a future version of Angular, where an error will occur in the
 *     scenario if we find the `ɵprov` on an ancestor only.
 */
export function getInheritedInjectableDef(type) {
    const def = type && (type[NG_PROV_DEF] || type[NG_INJECTABLE_DEF]);
    if (def) {
        const typeName = getTypeName(type);
        // TODO(FW-1307): Re-add ngDevMode when closure can handle it
        // ngDevMode &&
        console.warn(`DEPRECATED: DI is instantiating a token "${typeName}" that inherits its @Injectable decorator but does not provide one itself.\n` +
            `This will become an error in a future version of Angular. Please add @Injectable() to the "${typeName}" class.`);
        return def;
    }
    else {
        return null;
    }
}
/** Gets the name of a type, accounting for some cross-browser differences. */
function getTypeName(type) {
    // `Function.prototype.name` behaves differently between IE and other browsers. In most browsers
    // it'll always return the name of the function itself, no matter how many other functions it
    // inherits from. On IE the function doesn't have its own `name` property, but it takes it from
    // the lowest level in the prototype chain. E.g. if we have `class Foo extends Parent` most
    // browsers will evaluate `Foo.name` to `Foo` while IE will return `Parent`. We work around
    // the issue by converting the function to a string and parsing its name out that way via a regex.
    if (type.hasOwnProperty('name')) {
        return type.name;
    }
    const match = ('' + type).match(/^function\s*([^\s(]+)/);
    return match === null ? '' : match[1];
}
/**
 * Read the injector def type in a way which is immune to accidentally reading inherited value.
 *
 * @param type type which may have an injector def (`ɵinj`)
 */
export function getInjectorDef(type) {
    return type && (type.hasOwnProperty(NG_INJ_DEF) || type.hasOwnProperty(NG_INJECTOR_DEF)) ?
        type[NG_INJ_DEF] :
        null;
}
export const NG_PROV_DEF = getClosureSafeProperty({ ɵprov: getClosureSafeProperty });
export const NG_INJ_DEF = getClosureSafeProperty({ ɵinj: getClosureSafeProperty });
// We need to keep these around so we can read off old defs if new defs are unavailable
export const NG_INJECTABLE_DEF = getClosureSafeProperty({ ngInjectableDef: getClosureSafeProperty });
export const NG_INJECTOR_DEF = getClosureSafeProperty({ ngInjectorDef: getClosureSafeProperty });
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A value of `null` indicates\n * that the injectable does not belong to any scope.\n *\n * @codeGenApi\n * @publicApi The ViewEngine compiler emits code with this type for injectables. This code is\n *   deployed to npm, and should be treated as public api.\n\n */\nexport interface ɵɵInjectableDeclaration<T> {\n  /**\n   * Specifies that the given type belongs to a particular injector:\n   * - `InjectorType` such as `NgModule`,\n   * - `'root'` the root injector\n   * - `'any'` all injectors.\n   * - `null`, does not belong to any injector. Must be explicitly listed in the injector\n   *   `providers`.\n   */\n  providedIn: InjectorType<any>|'root'|'platform'|'any'|'environment'|null;\n\n  /**\n   * The token to which this definition belongs.\n   *\n   * Note that this may not be the same as the type that the `factory` will create.\n   */\n  token: unknown;\n\n  /**\n   * Factory method to execute to create an instance of the injectable.\n   */\n  factory: (t?: Type<any>) => T;\n\n  /**\n   * In a case of no explicit injector, a location where the instance of the injectable is stored.\n   */\n  value: T|undefined;\n}\n\n/**\n * Information about the providers to be included in an `Injector` as well as how the given type\n * which carries the information should be created by the DI system.\n *\n * An `InjectorDef` can import other types which have `InjectorDefs`, forming a deep nested\n * structure of providers with a defined priority (identically to how `NgModule`s also have\n * an import/dependency structure).\n *\n * NOTE: This is a private type and should not be exported\n *\n * @codeGenApi\n */\nexport interface ɵɵInjectorDef<T> {\n  // TODO(alxhub): Narrow down the type here once decorators properly change the return type of the\n  // class they are decorating (to add the ɵprov property for example).\n  providers: (Type<any>|ValueProvider|ExistingProvider|FactoryProvider|ConstructorProvider|\n              StaticClassProvider|ClassProvider|any[])[];\n\n  imports: (InjectorType<any>|InjectorTypeWithProviders<any>)[];\n}\n\n/**\n * A `Type` which has a `ɵprov: ɵɵInjectableDeclaration` static field.\n *\n * `InjectableType`s contain their own Dependency Injection metadata and are usable in an\n * `InjectorDef`-based `StaticInjector`.\n *\n * @publicApi\n */\nexport interface InjectableType<T> extends Type<T> {\n  /**\n   * Opaque type whose structure is highly version dependent. Do not rely on any properties.\n   */\n  ɵprov: unknown;\n}\n\n/**\n * A type which has an `InjectorDef` static field.\n *\n * `InjectorTypes` can be used to configure a `StaticInjector`.\n *\n * This is an opaque type whose structure is highly version dependent. Do not rely on any\n * properties.\n *\n * @publicApi\n */\nexport interface InjectorType<T> extends Type<T> {\n  ɵfac?: unknown;\n  ɵinj: unknown;\n}\n\n/**\n * Describes the `InjectorDef` equivalent of a `ModuleWithProviders`, an `InjectorType` with an\n * associated array of providers.\n *\n * Objects of this type can be listed in the imports section of an `InjectorDef`.\n *\n * NOTE: This is a private type and should not be exported\n */\nexport interface InjectorTypeWithProviders<T> {\n  ngModule: InjectorType<T>;\n  providers?: (Type<any>|ValueProvider|ExistingProvider|FactoryProvider|ConstructorProvider|\n               StaticClassProvider|ClassProvider|any[])[];\n}\n\n\n/**\n * Construct an injectable definition which defines how a token will be constructed by the DI\n * system, and in which injectors (if any) it will be available.\n *\n * This should be assigned to a static `ɵprov` field on a type, which will then be an\n * `InjectableType`.\n *\n * Options:\n * * `providedIn` determines which injectors will include the injectable, by either associating it\n *   with an `@NgModule` or other `InjectorType`, or by specifying that this injectable should be\n *   provided in the `'root'` injector, which will be the application-level injector in most apps.\n * * `factory` gives the zero argument function which will create an instance of the injectable.\n *   The factory can call `inject` to access the `Injector` and request injection of dependencies.\n *\n * @codeGenApi\n * @publicApi This instruction has been emitted by ViewEngine for some time and is deployed to npm.\n */\nexport function ɵɵdefineInjectable<T>(opts: {\n  token: unknown,\n  providedIn?: Type<any>|'root'|'platform'|'any'|'environment'|null, factory: () => T,\n}): unknown {\n  return {\n    token: opts.token,\n    providedIn: opts.providedIn as any || null,\n    factory: opts.factory,\n    value: undefined,\n  } as ɵɵInjectableDeclaration<T>;\n}\n\n/**\n * @deprecated in v8, delete after v10. This API should be used only by generated code, and that\n * code should now use ɵɵdefineInjectable instead.\n * @publicApi\n */\nexport const defineInjectable = ɵɵdefineInjectable;\n\n/**\n * Construct an `InjectorDef` which configures an injector.\n *\n * This should be assigned to a static injector def (`ɵinj`) field on a type, which will then be an\n * `InjectorType`.\n *\n * Options:\n *\n * * `providers`: an optional array of providers to add to the injector. Each provider must\n *   either have a factory or point to a type which has a `ɵprov` static property (the\n *   type must be an `InjectableType`).\n * * `imports`: an optional array of imports of other `InjectorType`s or `InjectorTypeWithModule`s\n *   whose providers will also be added to the injector. Locally provided types will override\n *   providers from imports.\n *\n * @codeGenApi\n */\nexport function ɵɵdefineInjector(options: {providers?: any[], imports?: any[]}): unknown {\n  return {providers: options.providers || [], imports: options.imports || []};\n}\n\n/**\n * Read the injectable def (`ɵprov`) for `type` in a way which is immune to accidentally reading\n * inherited value.\n *\n * @param type A type which may have its own (non-inherited) `ɵprov`.\n */\nexport function getInjectableDef<T>(type: any): ɵɵInjectableDeclaration<T>|null {\n  return getOwnDefinition(type, NG_PROV_DEF) || getOwnDefinition(type, NG_INJECTABLE_DEF);\n}\n\nexport function isInjectable(type: any): boolean {\n  return getInjectableDef(type) !== null;\n}\n\n/**\n * Return definition only if it is defined directly on `type` and is not inherited from a base\n * class of `type`.\n */\nfunction getOwnDefinition<T>(type: any, field: string): ɵɵInjectableDeclaration<T>|null {\n  return type.hasOwnProperty(field) ? type[field] : null;\n}\n\n/**\n * Read the injectable def (`ɵprov`) for `type` or read the `ɵprov` from one of its ancestors.\n *\n * @param type A type which may have `ɵprov`, via inheritance.\n *\n * @deprecated Will be removed in a future version of Angular, where an error will occur in the\n *     scenario if we find the `ɵprov` on an ancestor only.\n */\nexport function getInheritedInjectableDef<T>(type: any): ɵɵInjectableDeclaration<T>|null {\n  const def = type && (type[NG_PROV_DEF] || type[NG_INJECTABLE_DEF]);\n\n  if (def) {\n    const typeName = getTypeName(type);\n    // TODO(FW-1307): Re-add ngDevMode when closure can handle it\n    // ngDevMode &&\n    console.warn(\n        `DEPRECATED: DI is instantiating a token \"${\n            typeName}\" that inherits its @Injectable decorator but does not provide one itself.\\n` +\n        `This will become an error in a future version of Angular. Please add @Injectable() to the \"${\n            typeName}\" class.`);\n    return def;\n  } else {\n    return null;\n  }\n}\n\n/** Gets the name of a type, accounting for some cross-browser differences. */\nfunction getTypeName(type: any): string {\n  // `Function.prototype.name` behaves differently between IE and other browsers. In most browsers\n  // it'll always return the name of the function itself, no matter how many other functions it\n  // inherits from. On IE the function doesn't have its own `name` property, but it takes it from\n  // the lowest level in the prototype chain. E.g. if we have `class Foo extends Parent` most\n  // browsers will evaluate `Foo.name` to `Foo` while IE will return `Parent`. We work around\n  // the issue by converting the function to a string and parsing its name out that way via a regex.\n  if (type.hasOwnProperty('name')) {\n    return type.name;\n  }\n\n  const match = ('' + type).match(/^function\\s*([^\\s(]+)/);\n  return match === null ? '' : match[1];\n}\n\n/**\n * Read the injector def type in a way which is immune to accidentally reading inherited value.\n *\n * @param type type which may have an injector def (`ɵinj`)\n */\nexport function getInjectorDef<T>(type: any): ɵɵInjectorDef<T>|null {\n  return type && (type.hasOwnProperty(NG_INJ_DEF) || type.hasOwnProperty(NG_INJECTOR_DEF)) ?\n      (type as any)[NG_INJ_DEF] :\n      null;\n}\n\nexport const NG_PROV_DEF = getClosureSafeProperty({ɵprov: getClosureSafeProperty});\nexport const NG_INJ_DEF = getClosureSafeProperty({ɵinj: getClosureSafeProperty});\n\n// We need to keep these around so we can read off old defs if new defs are unavailable\nexport const NG_INJECTABLE_DEF = getClosureSafeProperty({ngInjectableDef: getClosureSafeProperty});\nexport const NG_INJECTOR_DEF = getClosureSafeProperty({ngInjectorDef: getClosureSafeProperty});\n"]}