@expressots/core
Version:
Expressots - modern, fast, lightweight nodejs web framework (@core)
151 lines (150 loc) • 5.91 kB
JavaScript
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveInstance = resolveInstance;
const error_msgs_1 = require("../constants/error_msgs");
const literal_types_1 = require("../constants/literal_types");
const METADATA_KEY = __importStar(require("../constants/metadata_keys"));
const async_1 = require("../utils/async");
function _resolveRequests(childRequests, resolveRequest) {
return childRequests.reduce((resolvedRequests, childRequest) => {
const injection = resolveRequest(childRequest);
const targetType = childRequest.target.type;
if (targetType === literal_types_1.TargetTypeEnum.ConstructorArgument) {
resolvedRequests.constructorInjections.push(injection);
}
else {
resolvedRequests.propertyRequests.push(childRequest);
resolvedRequests.propertyInjections.push(injection);
}
if (!resolvedRequests.isAsync) {
resolvedRequests.isAsync = (0, async_1.isPromiseOrContainsPromise)(injection);
}
return resolvedRequests;
}, {
constructorInjections: [],
propertyInjections: [],
propertyRequests: [],
isAsync: false,
});
}
function _createInstance(constr, childRequests, resolveRequest) {
let result;
if (childRequests.length > 0) {
const resolved = _resolveRequests(childRequests, resolveRequest);
const createInstanceWithInjectionsArg = {
...resolved,
constr,
};
if (resolved.isAsync) {
result = createInstanceWithInjectionsAsync(createInstanceWithInjectionsArg);
}
else {
result = createInstanceWithInjections(createInstanceWithInjectionsArg);
}
}
else {
result = new constr();
}
return result;
}
function createInstanceWithInjections(args) {
const instance = new args.constr(...args.constructorInjections);
args.propertyRequests.forEach((r, index) => {
const property = r.target.identifier;
const injection = args.propertyInjections[index];
if (!r.target.isOptional() || injection !== undefined) {
instance[property] = injection;
}
});
return instance;
}
async function createInstanceWithInjectionsAsync(args) {
const constructorInjections = await possiblyWaitInjections(args.constructorInjections);
const propertyInjections = await possiblyWaitInjections(args.propertyInjections);
return createInstanceWithInjections({
...args,
constructorInjections,
propertyInjections,
});
}
async function possiblyWaitInjections(possiblePromiseinjections) {
const injections = [];
for (const injection of possiblePromiseinjections) {
if (Array.isArray(injection)) {
injections.push(Promise.all(injection));
}
else {
injections.push(injection);
}
}
return Promise.all(injections);
}
function _getInstanceAfterPostConstruct(constr, result) {
const postConstructResult = _postConstruct(constr, result);
if ((0, async_1.isPromise)(postConstructResult)) {
return postConstructResult.then(() => result);
}
else {
return result;
}
}
function _postConstruct(constr, instance) {
if (Reflect.hasMetadata(METADATA_KEY.POST_CONSTRUCT, constr)) {
const data = Reflect.getMetadata(METADATA_KEY.POST_CONSTRUCT, constr);
try {
return instance[data.value]?.();
}
catch (e) {
if (e instanceof Error) {
throw new Error((0, error_msgs_1.POST_CONSTRUCT_ERROR)(constr.name, e.message));
}
}
}
}
function _validateInstanceResolution(binding, constr) {
if (binding.scope !== literal_types_1.BindingScopeEnum.Singleton) {
_throwIfHandlingDeactivation(binding, constr);
}
}
function _throwIfHandlingDeactivation(binding, constr) {
const scopeErrorMessage = `Class cannot be instantiated in ${binding.scope === literal_types_1.BindingScopeEnum.Request ? "request" : "transient"} scope.`;
if (typeof binding.onDeactivation === "function") {
throw new Error((0, error_msgs_1.ON_DEACTIVATION_ERROR)(constr.name, scopeErrorMessage));
}
if (Reflect.hasMetadata(METADATA_KEY.PRE_DESTROY, constr)) {
throw new Error((0, error_msgs_1.PRE_DESTROY_ERROR)(constr.name, scopeErrorMessage));
}
}
function resolveInstance(binding, constr, childRequests, resolveRequest) {
_validateInstanceResolution(binding, constr);
const result = _createInstance(constr, childRequests, resolveRequest);
if ((0, async_1.isPromise)(result)) {
return result.then((resolvedResult) => _getInstanceAfterPostConstruct(constr, resolvedResult));
}
else {
return _getInstanceAfterPostConstruct(constr, result);
}
}