use dependency injection for meta reducers

src/app/app.module.ts

@@ -4,15 +4,17 @@ import { HttpModule } from '@angular/http';
 import { FormsModule } from '@angular/forms';
 import { RouterModule } from '@angular/router';
 
-import { StoreModule } from '@ngrx/store';
+import { StoreModule, MetaReducer, META_REDUCERS } from '@ngrx/store';
 import { StoreDevtoolsModule } from '@ngrx/store-devtools';
 import { RouterStateSerializer, StoreRouterConnectingModule } from '@ngrx/router-store';
 
+import { storeFreeze } from 'ngrx-store-freeze';
+
 import { TranslateModule } from '@ngx-translate/core';
 
 import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
 
-import { appReducers } from './app.reducer';
+import { appReducers, AppState } from './app.reducer';
 import { appEffects } from './app.effects';
 
 import { CoreModule } from './core/core.module';
@@ -27,7 +29,7 @@ import { HeaderComponent } from './header/header.component';
 import { FooterComponent } from './footer/footer.component';
 import { PageNotFoundComponent } from './pagenotfound/pagenotfound.component';
 
-import { GLOBAL_CONFIG, ENV_CONFIG } from '../config';
+import { GLOBAL_CONFIG, ENV_CONFIG, GlobalConfig } from '../config';
 import { EffectsModule } from '@ngrx/effects';
 import { appMetaReducers } from './app.metareducers';
 
@@ -37,6 +39,10 @@ export function getConfig() {
   return ENV_CONFIG;
 }
 
+export function getMetaReducers(config: GlobalConfig): MetaReducer<AppState>[] {
+  return config.production ? appMetaReducers : [...appMetaReducers, storeFreeze];
+}
+
 @NgModule({
   imports: [
     CommonModule,
@@ -47,7 +53,7 @@ export function getConfig() {
     NgbModule.forRoot(),
     TranslateModule.forRoot(),
     EffectsModule.forRoot(appEffects),
-    StoreModule.forRoot(appReducers, { metaReducers: appMetaReducers }),
+    StoreModule.forRoot(appReducers),
     StoreDevtoolsModule.instrument({ maxAge: 50 }),
     StoreRouterConnectingModule,
     TransferHttpModule,
@@ -57,6 +63,11 @@ export function getConfig() {
       provide: GLOBAL_CONFIG,
       useFactory: (getConfig)
     },
+    {
+      provide: META_REDUCERS,
+      useFactory: getMetaReducers,
+      deps: [GLOBAL_CONFIG]
+    },
     {
       provide: RouterStateSerializer,
       useClass: DSpaceRouterStateSerializer