inversify/amd/resolution/instantiation.js

A powerful and lightweight inversion of control container for JavaScript and Node.js apps powered by TypeScript.

var __assign = (this && this.__assign) || function () {
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        for (var s, i = 1, n = arguments.length; i < n; i++) {
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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});
var __importStar = (this && this.__importStar) || function (mod) {
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};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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    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());
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};
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;
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var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
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            ar[i] = from[i];
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};
define(["require", "exports", "../constants/error_msgs", "../constants/literal_types", "../constants/metadata_keys", "../utils/async"], function (require, exports, error_msgs_1, literal_types_1, METADATA_KEY, async_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.resolveInstance = void 0;
    METADATA_KEY = __importStar(METADATA_KEY);
    function _resolveRequests(childRequests, resolveRequest) {
        return childRequests.reduce(function (resolvedRequests, childRequest) {
            var injection = resolveRequest(childRequest);
            var 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) {
        var result;
        if (childRequests.length > 0) {
            var resolved = _resolveRequests(childRequests, resolveRequest);
            var createInstanceWithInjectionsArg = __assign(__assign({}, resolved), { constr: constr });
            if (resolved.isAsync) {
                result = createInstanceWithInjectionsAsync(createInstanceWithInjectionsArg);
            }
            else {
                result = createInstanceWithInjections(createInstanceWithInjectionsArg);
            }
        }
        else {
            result = new constr();
        }
        return result;
    }
    function createInstanceWithInjections(args) {
        var _a;
        var instance = new ((_a = args.constr).bind.apply(_a, __spreadArray([void 0], args.constructorInjections, false)))();
        args.propertyRequests.forEach(function (r, index) {
            var property = r.target.identifier;
            var injection = args.propertyInjections[index];
            if (!r.target.isOptional() || injection !== undefined) {
                instance[property] = injection;
            }
        });
        return instance;
    }
    function createInstanceWithInjectionsAsync(args) {
        return __awaiter(this, void 0, void 0, function () {
            var constructorInjections, propertyInjections;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4, possiblyWaitInjections(args.constructorInjections)];
                    case 1:
                        constructorInjections = _a.sent();
                        return [4, possiblyWaitInjections(args.propertyInjections)];
                    case 2:
                        propertyInjections = _a.sent();
                        return [2, createInstanceWithInjections(__assign(__assign({}, args), { constructorInjections: constructorInjections, propertyInjections: propertyInjections }))];
                }
            });
        });
    }
    function possiblyWaitInjections(possiblePromiseinjections) {
        return __awaiter(this, void 0, void 0, function () {
            var injections, _i, possiblePromiseinjections_1, injection;
            return __generator(this, function (_a) {
                injections = [];
                for (_i = 0, possiblePromiseinjections_1 = possiblePromiseinjections; _i < possiblePromiseinjections_1.length; _i++) {
                    injection = possiblePromiseinjections_1[_i];
                    if (Array.isArray(injection)) {
                        injections.push(Promise.all(injection));
                    }
                    else {
                        injections.push(injection);
                    }
                }
                return [2, Promise.all(injections)];
            });
        });
    }
    function _getInstanceAfterPostConstruct(constr, result) {
        var postConstructResult = _postConstruct(constr, result);
        if ((0, async_1.isPromise)(postConstructResult)) {
            return postConstructResult.then(function () { return result; });
        }
        else {
            return result;
        }
    }
    function _postConstruct(constr, instance) {
        var _a, _b;
        if (Reflect.hasMetadata(METADATA_KEY.POST_CONSTRUCT, constr)) {
            var data = Reflect.getMetadata(METADATA_KEY.POST_CONSTRUCT, constr);
            try {
                return (_b = (_a = instance)[data.value]) === null || _b === void 0 ? void 0 : _b.call(_a);
            }
            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) {
        var 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);
        var result = _createInstance(constr, childRequests, resolveRequest);
        if ((0, async_1.isPromise)(result)) {
            return result.then(function (resolvedResult) { return _getInstanceAfterPostConstruct(constr, resolvedResult); });
        }
        else {
            return _getInstanceAfterPostConstruct(constr, result);
        }
    }
    exports.resolveInstance = resolveInstance;
});