LibraryInitializerModule.ts

import { NgModule, APP_INITIALIZER, ErrorHandler } from "@angular/core";
import { CommonModule } from "@angular/common";
import {
  LoggingService,
  LoggingModule,
  LogglyWriter
} from "@angularlicious/logging";
import {
  ConfigurationService,
  ConfigurationModule
} from "@angularlicious/configuration";
import { ConsoleWriter } from "@angularlicious/logging";
import {
  ErrorHandlingModule,
  ErrorHandlingService
} from "@angularlicious/error-handling";
import { environment } from "./../../../environments/environment";

/**
 * The factory function to initialize the logging service and writer for the
 * application.
 *
 * @param loggingService
 * @param consoleWriter
 */
export function initializeLogWriter(consoleWriter: ConsoleWriter) {
  console.log(`Initializing [Console Writer] from [AppModule]`);
  return () => {
    return consoleWriter;
  };
}
@NgModule({
  declarations: [],
  imports: [
    CommonModule,
    ErrorHandlingModule,
    LoggingModule,
    ConfigurationModule.forRoot({ config: environment.appConfig })
  ],
  providers: [
    ConfigurationService,
    LoggingService,
    ConsoleWriter,
    LogglyWriter,
    {
      provide: ErrorHandler,
      useClass: ErrorHandlingService
    },
    {
      provide: APP_INITIALIZER,
      useFactory: initializeLogWriter,
      deps: [LoggingService, ConsoleWriter, LogglyWriter],
      multi: true
    },
    {
      provide: ErrorHandler,
      useClass: ErrorHandlingService,
      deps: [ConfigurationService, LoggingService]
    }
  ]
})
export class LibraryInitializerModule {}