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| import {
Controller,
DynamicModule,
Injectable,
NestModule,
} from '@nestjs/common/interfaces';
import { Type } from '@nestjs/common/interfaces/type.interface';
import { randomStringGenerator } from '@nestjs/common/utils/random-string-generator.util';
import {
isFunction,
isNil,
isString,
isSymbol,
isUndefined,
} from '@nestjs/common/utils/shared.utils';
import { InvalidClassException } from '../errors/exceptions/invalid-class.exception';
import { RuntimeException } from '../errors/exceptions/runtime.exception';
import { UnknownExportException } from '../errors/exceptions/unknown-export.exception';
import { ApplicationReferenceHost } from '../helpers/application-ref-host';
import { ExternalContextCreator } from '../helpers/external-context-creator';
import { Reflector } from '../services/reflector.service';
import { InstanceWrapper, NestContainer } from './container';
import { ModuleRef } from './module-ref';
import { ModulesContainer } from './modules-container';
import { HTTP_SERVER_REF } from './tokens';
export interface CustomComponent {
provide: any;
name: string;
}
export type OpaqueToken = string | symbol | object | Type<any>;
export type CustomClass = CustomComponent & { useClass: Type<any> };
export type CustomFactory = CustomComponent & {
useFactory: (...args) => any;
inject?: OpaqueToken[];
};
export type CustomValue = CustomComponent & { useValue: any };
export type ComponentMetatype =
| Type<Injectable>
| CustomFactory
| CustomValue
| CustomClass;
export class Module {
private readonly _id: string;
private readonly _relatedModules = new Set<Module>();
private readonly _components = new Map<any, InstanceWrapper<Injectable>>();
private readonly _injectables = new Map<any, InstanceWrapper<Injectable>>();
private readonly _routes = new Map<string, InstanceWrapper<Controller>>();
private readonly _exports = new Set<string | symbol>();
constructor(
private readonly _metatype: Type<any>,
private readonly _scope: Type<any>[],
private readonly container: NestContainer,
) {
this.addCoreInjectables(container);
this._id = randomStringGenerator();
}
get id(): string {
return this._id;
}
get scope(): Type<any>[] {
return this._scope;
}
get relatedModules(): Set<Module> {
return this._relatedModules;
}
get components(): Map<string, InstanceWrapper<Injectable>> {
return this._components;
}
get injectables(): Map<string, InstanceWrapper<Injectable>> {
return this._injectables;
}
get routes(): Map<string, InstanceWrapper<Controller>> {
return this._routes;
}
get exports(): Set<string | symbol> {
return this._exports;
}
get instance(): NestModule {
if (!this._components.has(this._metatype.name)) {
throw new RuntimeException();
}
const module = this._components.get(this._metatype.name);
return module.instance as NestModule;
}
get metatype(): Type<any> {
return this._metatype;
}
public addCoreInjectables(container: NestContainer) {
this.addModuleAsComponent();
this.addModuleRef();
this.addReflector(container.getReflector());
this.addApplicationRef(container.getApplicationRef());
this.addExternalContextCreator(container.getExternalContextCreator());
this.addModulesContainer(container.getModulesContainer());
this.addApplicationRefHost(container.getApplicationRefHost());
}
public addModuleRef() {
const moduleRef = this.createModuleRefMetatype();
this._components.set(ModuleRef.name, {
name: ModuleRef.name,
metatype: ModuleRef as any,
isResolved: true,
instance: new moduleRef(),
});
}
public addModuleAsComponent() {
this._components.set(this._metatype.name, {
name: this._metatype.name,
metatype: this._metatype,
isResolved: false,
instance: null,
});
}
public addReflector(reflector: Reflector) {
this._components.set(Reflector.name, {
name: Reflector.name,
metatype: Reflector,
isResolved: true,
instance: reflector,
});
}
public addApplicationRef(applicationRef: any) {
this._components.set(HTTP_SERVER_REF, {
name: HTTP_SERVER_REF,
metatype: {} as any,
isResolved: true,
instance: applicationRef || {},
});
}
public addExternalContextCreator(
externalContextCreator: ExternalContextCreator,
) {
this._components.set(ExternalContextCreator.name, {
name: ExternalContextCreator.name,
metatype: ExternalContextCreator,
isResolved: true,
instance: externalContextCreator,
});
}
public addModulesContainer(modulesContainer: ModulesContainer) {
this._components.set(ModulesContainer.name, {
name: ModulesContainer.name,
metatype: ModulesContainer,
isResolved: true,
instance: modulesContainer,
});
}
public addApplicationRefHost(applicationRefHost: ApplicationReferenceHost) {
this._components.set(ApplicationReferenceHost.name, {
name: ApplicationReferenceHost.name,
metatype: ApplicationReferenceHost,
isResolved: true,
instance: applicationRefHost,
});
}
public addInjectable(injectable: Type<Injectable>) {
if (this.isCustomProvider(injectable)) {
return this.addCustomProvider(injectable, this._injectables);
}
this._injectables.set(injectable.name, {
name: injectable.name,
metatype: injectable,
instance: null,
isResolved: false,
});
}
public addComponent(component: ComponentMetatype): string {
if (this.isCustomProvider(component)) {
return this.addCustomProvider(component, this._components);
}
this._components.set((component as Type<Injectable>).name, {
name: (component as Type<Injectable>).name,
metatype: component as Type<Injectable>,
instance: null,
isResolved: false,
});
return (component as Type<Injectable>).name;
}
public isCustomProvider(
component: ComponentMetatype,
): component is CustomClass | CustomFactory | CustomValue {
return !isNil((component as CustomComponent).provide);
}
public addCustomProvider(
component: CustomFactory | CustomValue | CustomClass,
collection: Map<string, any>,
): string {
const { provide } = component;
const name = isFunction(provide) ? provide.name : provide;
const componentWithName = {
...component,
name,
};
if (this.isCustomClass(componentWithName))
this.addCustomClass(componentWithName, collection);
else if (this.isCustomValue(componentWithName))
this.addCustomValue(componentWithName, collection);
else if (this.isCustomFactory(componentWithName))
this.addCustomFactory(componentWithName, collection);
return name;
}
public isCustomClass(component): component is CustomClass {
return !isUndefined((component as CustomClass).useClass);
}
public isCustomValue(component): component is CustomValue {
return !isUndefined((component as CustomValue).useValue);
}
public isCustomFactory(component): component is CustomFactory {
return !isUndefined((component as CustomFactory).useFactory);
}
public isDynamicModule(exported): exported is DynamicModule {
return exported && exported.module;
}
public addCustomClass(component: CustomClass, collection: Map<string, any>) {
const { name, useClass } = component;
collection.set(name, {
name,
metatype: useClass,
instance: null,
isResolved: false,
});
}
public addCustomValue(component: CustomValue, collection: Map<string, any>) {
const { name, useValue: value } = component;
collection.set(name, {
name,
metatype: null,
instance: value,
isResolved: true,
isNotMetatype: true,
async: value instanceof Promise,
});
}
public addCustomFactory(
component: CustomFactory,
collection: Map<string, any>,
) {
const { name, useFactory: factory, inject } = component;
collection.set(name, {
name,
metatype: factory as any,
instance: null,
isResolved: false,
inject: inject || [],
isNotMetatype: true,
});
}
public addExportedComponent(
exportedComponent: ComponentMetatype | string | symbol | DynamicModule,
) {
const addExportedUnit = (token: string | symbol) =>
this._exports.add(this.validateExportedProvider(token));
if (this.isCustomProvider(exportedComponent as any)) {
return this.addCustomExportedComponent(exportedComponent as any);
} else Iif (isString(exportedComponent) || isSymbol(exportedComponent)) {
return addExportedUnit(exportedComponent);
} else Iif (this.isDynamicModule(exportedComponent)) {
const { module } = exportedComponent;
return addExportedUnit(module.name);
}
addExportedUnit(exportedComponent.name);
}
public addCustomExportedComponent(
exportedComponent: CustomFactory | CustomValue | CustomClass,
) {
const provide = exportedComponent.provide;
Eif (isString(provide) || isSymbol(provide)) {
return this._exports.add(this.validateExportedProvider(provide));
}
this._exports.add(this.validateExportedProvider(provide.name));
}
public validateExportedProvider(token: string | symbol) {
if (this._components.has(token)) {
return token;
}
const importedArray = [...this._relatedModules.values()];
const importedRefNames = importedArray
.filter(item => item)
.map(({ metatype }) => metatype)
.filter(metatype => metatype)
.map(({ name }) => name);
if (!importedRefNames.includes(token as any)) {
const { name } = this.metatype;
throw new UnknownExportException(name);
}
return token;
}
public addRoute(route: Type<Controller>) {
this._routes.set(route.name, {
name: route.name,
metatype: route,
instance: null,
isResolved: false,
});
}
public addRelatedModule(relatedModule) {
this._relatedModules.add(relatedModule);
}
public replace(toReplace, options) {
if (options.isComponent) {
return this.addComponent({ provide: toReplace, ...options });
}
this.addInjectable({
provide: toReplace,
...options,
});
}
public createModuleRefMetatype(): any {
const self = this;
return class extends ModuleRef {
constructor() {
super(self.container);
}
public get<TInput = any, TResult = TInput>(
typeOrToken: Type<TInput> | string | symbol,
options: { strict: boolean } = { strict: true },
): TResult {
Iif (!(options && options.strict)) {
return this.find<TInput, TResult>(typeOrToken);
}
return this.findInstanceByPrototypeOrToken<TInput, TResult>(
typeOrToken,
self,
);
}
public async create<T = any>(type: Type<T>): Promise<T> {
if (!(type && isFunction(type) && type.prototype)) {
throw new InvalidClassException(type);
}
return this.instantiateClass<T>(type, self);
}
};
}
}
|