@jokio/datastore/dist/db-aggregate.js

Helper library for Google Cloud Datastore

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
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        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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};
Object.defineProperty(exports, "__esModule", { value: true });
var db_set_1 = require("./db-set");
var db_transaction_1 = require("./db-transaction");
var event_1 = require("./event");
var DomainEvent = /** @class */ (function (_super) {
    __extends(DomainEvent, _super);
    function DomainEvent() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    return DomainEvent;
}(event_1.Event));
exports.DomainEvent = DomainEvent;
var AggregateRoot = /** @class */ (function () {
    function AggregateRoot(kind, datastore, parentTransaction) {
        this.kind = kind;
        this.datastore = datastore;
        this.parentTransaction = parentTransaction;
        this.db = this.parentTransaction
            ? new db_transaction_1.DbTransaction(this.kind, this.datastore, this.parentTransaction)
            : new db_set_1.DbSet(this.kind, this.datastore);
        this.doTransaction = db_transaction_1.configureDbTransaction(kind, datastore);
    }
    AggregateRoot.prototype.load = function (id) {
        return __awaiter(this, void 0, void 0, function () {
            var dbTransaction, _a, _b;
            return __generator(this, function (_c) {
                switch (_c.label) {
                    case 0:
                        if (!this.parentTransaction) return [3 /*break*/, 2];
                        dbTransaction = new db_transaction_1.DbTransaction(this.kind, this.datastore, this.parentTransaction);
                        _a = this;
                        return [4 /*yield*/, dbTransaction.get(id)];
                    case 1:
                        _a.state = _c.sent();
                        return [3 /*break*/, 4];
                    case 2:
                        _b = this;
                        return [4 /*yield*/, this.db.get(id)];
                    case 3:
                        _b.state = _c.sent();
                        _c.label = 4;
                    case 4:
                        if (this.aggregates) {
                            this.updateToAggregateStates();
                            this.updateFromAggregateStates();
                        }
                        this.stateLoaded(this.state);
                        return [2 /*return*/, this.state];
                }
            });
        });
    };
    AggregateRoot.prototype.stateLoaded = function (state) { };
    AggregateRoot.prototype.save = function (Event, data) {
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            var doSave, dbTransaction;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        doSave = function (dbTran, transaction) { return __awaiter(_this, void 0, void 0, function () {
                            var item;
                            return __generator(this, function (_a) {
                                switch (_a.label) {
                                    case 0:
                                        if (!this.state)
                                            return [2 /*return*/];
                                        this.updateFromAggregateStates();
                                        if (!this.state.lastUpdatedAt) return [3 /*break*/, 2];
                                        return [4 /*yield*/, dbTran.get(this.state.id)];
                                    case 1:
                                        item = _a.sent();
                                        if (item.lastUpdatedAt.toString() != this.state.lastUpdatedAt.toString())
                                            throw new Error('VERSION_CHANGED');
                                        _a.label = 2;
                                    case 2: return [4 /*yield*/, dbTran.save(this.state)];
                                    case 3:
                                        _a.sent();
                                        this.updateToAggregateStates();
                                        return [4 /*yield*/, Event.post({ transaction: transaction, data: data })];
                                    case 4:
                                        _a.sent();
                                        return [2 /*return*/];
                                }
                            });
                        }); };
                        if (!this.parentTransaction) return [3 /*break*/, 2];
                        dbTransaction = new db_transaction_1.DbTransaction(this.kind, this.datastore, this.parentTransaction);
                        return [4 /*yield*/, doSave(dbTransaction, this.parentTransaction)];
                    case 1:
                        _a.sent();
                        return [2 /*return*/, this.state];
                    case 2: return [4 /*yield*/, this.transaction(doSave)];
                    case 3:
                        _a.sent();
                        return [2 /*return*/, this.state];
                }
            });
        });
    };
    AggregateRoot.prototype.query = function (queryProcessor, options) {
        return this.db.query(queryProcessor, options);
    };
    AggregateRoot.prototype.queryWithMetadata = function (queryProcessor, options) {
        return this.db.queryWithInfo(queryProcessor, options);
    };
    AggregateRoot.prototype.transaction = function (process) {
        return this.doTransaction(process);
    };
    AggregateRoot.prototype.updateToAggregateStates = function () {
        if (!this.aggregates)
            return;
        var defaultState = {};
        for (var i in this.aggregates) {
            var aggr = this.aggregates[i];
            if (!aggr)
                continue;
            aggr.state = this.state[i];
        }
    };
    AggregateRoot.prototype.updateFromAggregateStates = function () {
        if (!this.aggregates)
            return;
        var defaultState = {};
        this.state = this.state || defaultState;
        for (var i in this.aggregates) {
            var aggr = this.aggregates[i];
            if (!aggr)
                continue;
            this.state[i] = aggr.state;
        }
    };
    return AggregateRoot;
}());
exports.AggregateRoot = AggregateRoot;
var Aggregate = /** @class */ (function () {
    function Aggregate() {
        this.state = this.defaultState;
    }
    Object.defineProperty(Aggregate.prototype, "state", {
        get: function () {
            if (!this._state)
                this._state = this.defaultState;
            return this._state;
        },
        set: function (value) {
            this._state = value;
        },
        enumerable: true,
        configurable: true
    });
    return Aggregate;
}());
exports.Aggregate = Aggregate;
var AggregateRootResolver = /** @class */ (function () {
    function AggregateRootResolver(datastore) {
        this.datastore = datastore;
    }
    AggregateRootResolver.prototype.get = function (aggregateType, transaction) {
        return new aggregateType(this.datastore, transaction);
    };
    return AggregateRootResolver;
}());
exports.AggregateRootResolver = AggregateRootResolver;