"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const iterare_1 = require("iterare");
const transient_instances_1 = require("../injector/transient-instances");
/**
* Checks if the given instance has the `onApplicationShutdown` function
*
* @param instance The instance which should be checked
*/
function hasOnAppShutdownHook(instance) {
return !shared_utils_1.isNil(instance.onApplicationShutdown);
}
/**
* Calls the given instances
*/
function callOperator(instances, signal) {
return iterare_1.iterate(instances)
.filter(instance => !shared_utils_1.isNil(instance))
.filter(hasOnAppShutdownHook)
.map(async (instance) => instance.onApplicationShutdown(signal))
.toArray();
}
/**
* Calls the `onApplicationShutdown` function on the module and its children
* (providers / controllers).
*
* @param module The module which will be initialized
*/
async function callAppShutdownHook(module, signal) {
const providers = module.getNonAliasProviders();
// Module (class) instance is the first element of the providers array
// Lifecycle hook has to be called once all classes are properly initialized
const [_, moduleClassHost] = providers.shift();
const instances = [
...module.controllers,
...providers,
...module.injectables,
...module.middlewares,
];
const nonTransientInstances = transient_instances_1.getNonTransientInstances(instances);
await Promise.all(callOperator(nonTransientInstances, signal));
const transientInstances = transient_instances_1.getTransientInstances(instances);
await Promise.all(callOperator(transientInstances, signal));
// Call the instance itself
const moduleClassInstance = moduleClassHost.instance;
if (moduleClassInstance &&
hasOnAppShutdownHook(moduleClassInstance) &&
moduleClassHost.isDependencyTreeStatic()) {
await moduleClassInstance.onApplicationShutdown(signal);
}
}
exports.callAppShutdownHook = callAppShutdownHook;