"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");
/**
* Returns true or false if the given instance has a `onModuleDestroy` function
*
* @param instance The instance which should be checked
*/
function hasOnModuleDestroyHook(instance) {
return !shared_utils_1.isNil(instance.onModuleDestroy);
}
/**
* Calls the given instances onModuleDestroy hook
*/
function callOperator(instances) {
return iterare_1.iterate(instances)
.filter(instance => !shared_utils_1.isNil(instance))
.filter(hasOnModuleDestroyHook)
.map(async (instance) => instance.onModuleDestroy())
.toArray();
}
/**
* Calls the `onModuleDestroy` function on the module and its children
* (providers / controllers).
*
* @param module The module which will be initialized
*/
async function callModuleDestroyHook(module) {
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 destroyed
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));
const transientInstances = transient_instances_1.getTransientInstances(instances);
await Promise.all(callOperator(transientInstances));
// Call the module instance itself
const moduleClassInstance = moduleClassHost.instance;
if (moduleClassInstance &&
hasOnModuleDestroyHook(moduleClassInstance) &&
moduleClassHost.isDependencyTreeStatic()) {
await moduleClassInstance.onModuleDestroy();
}
}
exports.callModuleDestroyHook = callModuleDestroyHook;