Injector/Injector.js

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var Injector_1 = require("../@types/Injector");
var ExpressTS_1 = __importDefault(require("../app/ExpressTS"));
/**
 * @abstract
 * @class
 * @classdesc The injector class. This class can't be instantiated.
 * @memberof module:Injector
 */
var Injector = /** @class */ (function () {
    /**
     * @private
     * @hideconstructor
     */
    function Injector() {
    }
    /**
     * This function is used to setup the configuration of the server
     *
     * @param {Configuration} config The configuration of the server
     */
    Injector.setup = function (config) {
        Injector.inject('Configuration', config, Injector_1.InjectType.Variable);
    };
    /**
     * This function is used to get an injected object/variable.
     * If you have a class, you can use the [\@Retrieve]{@link Retrieve}
     * decorator
     * @param {string} name The name of the object/variable.
     * @return {T | null}
     * @example <caption>Example usage of [Injector.get]{@link Injector.get}.</caption>
     * [Injector.get]{@link Injector.get}<string>('name');
     * [Injector.get]{@link Injector.get}<Configuration>('Configuration');
     */
    Injector.get = function (name) {
        var _a;
        if (!((_a = this.instances[name.toString()]) === null || _a === void 0 ? void 0 : _a.instance)) {
            return null;
        }
        return this.instances[name.toString()].instance;
    };
    /**
     * This function is used to inject an object/variable.
     * @param {string} name The name of the object/variable.
     * @param {any} value The object/variable.
     * @param {InjectType} type The type of the object
     * @return {void}
     */
    Injector.inject = function (name, value, type) {
        var _a, _b, _c;
        if (type === void 0) { type = Injector_1.InjectType.Class; }
        if (!value) {
            throw new Error('A value is required for injection');
        }
        var injectedName = ExpressTS_1.default.getInjectedField(value, 'name');
        var injectedType = ExpressTS_1.default.getInjectedField(value, 'type');
        var InstanceTarget = ExpressTS_1.default.getData(injectedName, 'injections');
        if (InstanceTarget &&
            !this.instances[name.toString()] &&
            (type === Injector_1.InjectType.Class || type === Injector_1.InjectType.Middleware)) {
            if (injectedType !== 'class') {
                throw new Error("The injected type for '" + injectedName + "' is '" + injectedType + "', but the InjectType is not 'Class' or 'Middleware'");
            }
            var instance = new InstanceTarget();
            this.instances = __assign(__assign({}, this.instances), (_a = {}, _a[name] = {
                instance: instance,
                type: type
            }, _a));
        }
        else if (type === Injector_1.InjectType.Variable || type === Injector_1.InjectType.Function) {
            this.instances = __assign(__assign({}, this.instances), (_b = {}, _b[name] = {
                instance: value,
                type: type
            }, _b));
        }
        else if (type === Injector_1.InjectType.FunctionResult) {
            var func = value();
            this.instances = __assign(__assign({}, this.instances), (_c = {}, _c[name] = {
                instance: func,
                type: type
            }, _c));
        }
        else {
            throw new Error("Unable to inject " + name + " with type " + type);
        }
    };
    /**
     * This function will trigger the onLoad as a promise and
     * after will trigger the onReady
     */
    Injector.ready = function () {
        return __awaiter(this, void 0, void 0, function () {
            var entities;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        entities = Object.values(this.instances).filter(function (x) { return x.type === Injector_1.InjectType.Class && x.instance && x.instance.onLoad; });
                        return [4 /*yield*/, entities.reduce(function (current, next) {
                                return current.then(function () { return next.instance.onLoad(); });
                            }, Promise.resolve())];
                    case 1:
                        _a.sent();
                        Object.values(this.instances)
                            .filter(function (x) {
                            return x.type === Injector_1.InjectType.Class && x.instance && x.instance.onReady;
                        })
                            .map(function (x) { return x.instance.onReady(); });
                        ExpressTS_1.default.clearInjections();
                        return [2 /*return*/];
                }
            });
        });
    };
    Injector.instances = {};
    return Injector;
}());
exports.default = Injector;
//# sourceMappingURL=Injector.js.map