@lotto24-angular/imports-orchestrator
Version:
Orchestrate dynamically imported components in Angular applications
104 lines • 15.9 kB
JavaScript
import { inject, Injectable, Injector, runInInjectionContext, } from '@angular/core';
import { findFn, findImportPriority } from './host-directive/util';
import { ImportsQueueProcessor } from './queue/imports-queue-processor.service';
import { Subject } from 'rxjs';
import { IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE, IMPORTS_ORCHESTRATOR_FEATURE_INTERCEPTOR, IMPORTS_ORCHESTRATOR_FEATURE_LOGGER, IMPORTS_ORCHESTRATOR_FEATURE_ORCHESTRATION, IMPORTS_ORCHESTRATOR_FEATURE_QUEUE, IMPORTS_ORCHESTRATOR_FEATURE_TIMEOUT, } from './internal';
import * as i0 from "@angular/core";
export class ImportService {
constructor() {
this.queueProcessor = inject(ImportsQueueProcessor);
this.timeout = inject(IMPORTS_ORCHESTRATOR_FEATURE_TIMEOUT);
this.logger = inject(IMPORTS_ORCHESTRATOR_FEATURE_LOGGER);
this.queue = inject(IMPORTS_ORCHESTRATOR_FEATURE_QUEUE);
this.orchestration = inject(IMPORTS_ORCHESTRATOR_FEATURE_ORCHESTRATION);
this.interceptor = inject(IMPORTS_ORCHESTRATOR_FEATURE_INTERCEPTOR, { optional: true });
this.injector = inject(Injector);
}
createQueueItem(identifier, destroy$, options = {}) {
const opts = {
...options,
injector: options.injector ?? this.injector,
timeout: options.timeout ?? this.timeout,
};
const imports = this.importsFromDI(opts.injector);
const resolveFn = this.resolveFnFromImports(imports, identifier);
const priority = findImportPriority(this.orchestration, identifier, this.logger);
const hooks = {
queued: new Subject(),
start: new Subject(),
finish: new Subject(),
error: new Subject(),
};
runInInjectionContext(this.injector, () => {
if (this.interceptor) {
this.interceptor(identifier, hooks);
}
});
return {
...opts,
priority,
identifier,
resolveFn,
destroy$,
hooks,
logger: this.logger,
toString: () => `="${identifier}", =${priority}`,
};
}
async addItemToQueue(item) {
const promise = new Promise((resolve, reject) => {
item.callback = (result, err) => {
if (err) {
reject(err);
}
else {
resolve(result);
}
};
});
this.queue.insert(item.priority, item);
item.lifecycle?.importQueued?.emit();
item.hooks.queued.next(item);
item.hooks.queued.complete();
this.logger.debug(`queue insert ${item.toString()}`);
this.queueProcessor.process();
return promise;
}
async bypassQueue(item) {
this.logger.debug(`bypass queue ${item.toString()}`);
return item.resolveFn(item);
}
removeItemFromQueue(item) {
return this.queue.take(item) !== undefined;
}
importsFromDI(injector) {
try {
const store = injector.get(IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE);
return store;
}
catch (x) {
throw new Error(`
Could not inject ${IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE}. Did you \`provideImports({...})\` in a component or module? If you did, you may need to provide an Injector when calling createQueueItem.
${x}`);
}
}
resolveFnFromImports(imports, identifier) {
try {
return findFn(imports, identifier);
}
catch (x) {
throw new Error(`
Could not find ImportResolveFn. Did you \`provideImports({...})\` in a component or module? If you did, you may need to provide an Injector when calling createQueueItem.
${x}`);
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.6", ngImport: i0, type: ImportService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.0.6", ngImport: i0, type: ImportService, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.6", ngImport: i0, type: ImportService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}] });
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{\n  inject,\n  Injectable,\n  Injector,\n  runInInjectionContext,\n} from '@angular/core';\nimport { findFn, findImportPriority } from './host-directive/util';\nimport { ImportsQueueProcessor } from './queue/imports-queue-processor.service';\nimport { Observable, Subject } from 'rxjs';\nimport { ImportResolveFn } from './resolve';\nimport {\n  ImportLifecycle,\n  ImportObservableComponentIO,\n  ImportsInterceptorHooks,\n} from './interface';\n\nimport {\n  IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE,\n  IMPORTS_ORCHESTRATOR_FEATURE_INTERCEPTOR,\n  IMPORTS_ORCHESTRATOR_FEATURE_LOGGER,\n  IMPORTS_ORCHESTRATOR_FEATURE_ORCHESTRATION,\n  IMPORTS_ORCHESTRATOR_FEATURE_QUEUE,\n  IMPORTS_ORCHESTRATOR_FEATURE_TIMEOUT,\n} from './internal';\nimport { ImportsStore } from './features/internal';\nimport { ConsoleLike } from './features';\n\nexport interface ImportServiceOptions {\n  lifecycle?: Partial<ImportLifecycle>;\n  io?: ImportObservableComponentIO;\n  injector: Injector;\n  timeout: number;\n}\n\ninterface InterceptorHooksSubjects extends ImportsInterceptorHooks {\n  queued: Subject<ImportsOrchestratorQueueItem>;\n  finish: Subject<ImportsOrchestratorQueueItem>;\n  start: Subject<ImportsOrchestratorQueueItem>;\n  error: Subject<[ImportsOrchestratorQueueItem, unknown]>;\n}\n\nexport interface ImportsOrchestratorQueueItem extends ImportServiceOptions {\n  identifier: string;\n  resolveFn: ImportResolveFn;\n  priority: number;\n  logger: ConsoleLike;\n  destroy$: Observable<void>;\n  hooks: InterceptorHooksSubjects;\n  callback?: (result: unknown, err: unknown) => void;\n  toString: () => string;\n}\n\n@Injectable({\n  providedIn: 'root',\n})\nexport class ImportService {\n  private readonly queueProcessor = inject(ImportsQueueProcessor);\n  private readonly timeout = inject(IMPORTS_ORCHESTRATOR_FEATURE_TIMEOUT);\n  private readonly logger = inject(IMPORTS_ORCHESTRATOR_FEATURE_LOGGER);\n  private readonly queue = inject(IMPORTS_ORCHESTRATOR_FEATURE_QUEUE);\n  private readonly orchestration = inject(\n    IMPORTS_ORCHESTRATOR_FEATURE_ORCHESTRATION\n  );\n  private readonly interceptor = inject(\n    IMPORTS_ORCHESTRATOR_FEATURE_INTERCEPTOR,\n    { optional: true }\n  );\n  private readonly injector = inject(Injector);\n\n  public createQueueItem(\n    identifier: string,\n    destroy$: Observable<void>,\n    options: Partial<ImportServiceOptions> = {}\n  ): Readonly<ImportsOrchestratorQueueItem> {\n    const opts: ImportServiceOptions = {\n      ...options,\n      injector: options.injector ?? this.injector,\n      timeout: options.timeout ?? this.timeout,\n    };\n\n    const imports = this.importsFromDI(opts.injector);\n    const resolveFn = this.resolveFnFromImports(imports, identifier);\n\n    const priority = findImportPriority(\n      this.orchestration,\n      identifier,\n      this.logger\n    );\n\n    const hooks: InterceptorHooksSubjects = {\n      queued: new Subject(),\n      start: new Subject(),\n      finish: new Subject(),\n      error: new Subject(),\n    };\n\n    runInInjectionContext(this.injector, () => {\n      if (this.interceptor) {\n        this.interceptor(identifier, hooks);\n      }\n    });\n\n    return {\n      ...opts,\n      priority,\n      identifier,\n      resolveFn,\n      destroy$,\n      hooks,\n      logger: this.logger,\n      toString: () => `@identifier=\"${identifier}\", @priority=${priority}`,\n    };\n  }\n\n  public async addItemToQueue(\n    item: ImportsOrchestratorQueueItem\n  ): Promise<unknown> {\n    const promise = new Promise((resolve, reject) => {\n      item.callback = (result, err) => {\n        if (err) {\n          reject(err);\n        } else {\n          resolve(result);\n        }\n      };\n    });\n\n    this.queue.insert(item.priority, item);\n    item.lifecycle?.importQueued?.emit();\n    item.hooks.queued.next(item);\n    item.hooks.queued.complete();\n\n    this.logger.debug(`queue insert ${item.toString()}`);\n\n    this.queueProcessor.process();\n\n    return promise;\n  }\n\n  public async bypassQueue(\n    item: ImportsOrchestratorQueueItem\n  ): Promise<unknown> {\n    this.logger.debug(`bypass queue ${item.toString()}`);\n\n    return item.resolveFn(item);\n  }\n\n  public removeItemFromQueue(\n    item: Readonly<ImportsOrchestratorQueueItem>\n  ): boolean {\n    return this.queue.take(item) !== undefined;\n  }\n\n  private importsFromDI(injector: Injector): ImportsStore {\n    try {\n      const store = injector.get(IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE);\n      return store;\n    } catch (x: unknown) {\n      throw new Error(`\n        Could not inject ${IMPORTS_ORCHESTRATOR_FEATURE_IMPORTS_STORE}. Did you \\`provideImports({...})\\` in a component or module? If you did, you may need to provide an Injector when calling createQueueItem.\n        ${x}`);\n    }\n  }\n\n  private resolveFnFromImports(\n    imports: ImportsStore,\n    identifier: string\n  ): ImportResolveFn {\n    try {\n      return findFn(imports, identifier);\n    } catch (x) {\n      throw new Error(`\n        Could not find ImportResolveFn. Did you \\`provideImports({...})\\` in a component or module? If you did, you may need to provide an Injector when calling createQueueItem.\n        ${x}`);\n    }\n  }\n}\n"]}