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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.callModuleInitHook = void 0;
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const iterare_1 = require("iterare");
const transient_instances_1 = require("../injector/helpers/transient-instances");
/**
* Returns true or false if the given instance has a `onModuleInit` function
*
* @param instance The instance which should be checked
*/
function hasOnModuleInitHook(instance) {
return (0, shared_utils_1.isFunction)(instance.onModuleInit);
}
/**
* Calls the given instances
*/
function callOperator(instances) {
return (0, iterare_1.iterate)(instances)
.filter(instance => !(0, shared_utils_1.isNil)(instance))
.filter(hasOnModuleInitHook)
.map(async (instance) => instance.onModuleInit())
.toArray();
}
/**
* Calls the `onModuleInit` function on the module and its children
* (providers / controllers).
*
* @param module The module which will be initialized
*/
async function callModuleInitHook(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 initialized
const [_, moduleClassHost] = providers.shift();
const instances = [
...module.controllers,
...providers,
...module.injectables,
...module.middlewares,
];
const nonTransientInstances = (0, transient_instances_1.getNonTransientInstances)(instances);
await Promise.all(callOperator(nonTransientInstances));
const transientInstances = (0, transient_instances_1.getTransientInstances)(instances);
await Promise.all(callOperator(transientInstances));
// Call the instance itself
const moduleClassInstance = moduleClassHost.instance;
if (moduleClassInstance &&
hasOnModuleInitHook(moduleClassInstance) &&
moduleClassHost.isDependencyTreeStatic()) {
await moduleClassInstance.onModuleInit();
}
}
exports.callModuleInitHook = callModuleInitHook;