cap_mdb_handler
Version:
A SAP CAP handler to connect to any MongoDB instance as database layer.
222 lines (221 loc) • 10.5 kB
JavaScript
"use strict";
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 (g && (g = 0, op[0] && (_ = 0)), _) 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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var MDBConnection_1 = require("./MDBConnection");
var MDBParser_1 = require("./MDBParser");
var MDBHandler = /** @class */ (function () {
function MDBHandler(sConnectionString, sDatabase) {
this.sConnectionString = sConnectionString;
this.sDatabase = sDatabase;
this.oDB = new MDBConnection_1.default(this.sConnectionString);
}
/**
* Reads the data from the MongoDB database
* @param req The request object from the service
* @returns The result of the read operation
*/
MDBHandler.prototype.read = function (req) {
return __awaiter(this, void 0, void 0, function () {
var oClient, oParser, sCollection, oFind, oOrder, oTop, aResults;
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0: return [4 /*yield*/, this.oDB.connect()];
case 1:
_b.sent();
oClient = this.oDB.get();
oParser = new MDBParser_1.default(req);
oParser.parse();
sCollection = oParser.getCollection();
oFind = oParser.getFind();
oOrder = oParser.getSort();
oTop = oParser.getLimit();
return [4 /*yield*/, oClient
.db(this.sDatabase)
.collection(sCollection)
.find(oFind)
.sort((_a = {}, _a[Object.keys(oOrder)[0]] = Object.values(oOrder)[0], _a))
.limit(oTop.limit)
.skip(oTop.skip)
.toArray()];
case 2:
aResults = _b.sent();
console.log("Found " + aResults.length + " results");
aResults["$count"] = aResults.length;
return [2 /*return*/, aResults];
}
});
});
};
/**
* Creates a new entry in the MongoDB database.
* @param req The request object from the service
* @returns The result of the create operation
*/
MDBHandler.prototype.create = function (req) {
return __awaiter(this, void 0, void 0, function () {
var oClient, oParser, oResult;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.oDB.connect()];
case 1:
_a.sent();
oClient = this.oDB.get();
oParser = new MDBParser_1.default(req);
oParser.parse();
return [4 /*yield*/, this.checkOrCreateCollection(oParser.getCollection())];
case 2:
_a.sent();
return [4 /*yield*/, oClient
.db(this.sDatabase)
.collection(oParser.getCollection())
.insertOne(oParser.getData())];
case 3:
oResult = _a.sent();
if (oResult.acknowledged) {
return [2 /*return*/, req.data];
}
else {
throw new Error("Failed to insert data");
}
return [2 /*return*/];
}
});
});
};
/**
* Updates an entry in the MongoDB database
* @param req The request object from the service
* @returns The result of the update operation
*/
MDBHandler.prototype.update = function (req) {
return __awaiter(this, void 0, void 0, function () {
var oClient, oParser, oResult;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.oDB.connect()];
case 1:
_a.sent();
oClient = this.oDB.get();
oParser = new MDBParser_1.default(req);
oParser.parse();
return [4 /*yield*/, oClient
.db(this.sDatabase)
.collection(oParser.getCollection())
.updateOne(oParser.getFind(), { $set: oParser.getData() })];
case 2:
oResult = _a.sent();
if (oResult.acknowledged) {
return [2 /*return*/, req.data];
}
else {
throw new Error("Failed to update data");
}
return [2 /*return*/];
}
});
});
};
/**
* Deletes an entry from the MongoDB database
* @param req The request object from the service
* @returns The result of the delete operation
*/
MDBHandler.prototype.delete = function (req) {
return __awaiter(this, void 0, void 0, function () {
var oClient, oParser, oResult;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.oDB.connect()];
case 1:
_a.sent();
oClient = this.oDB.get();
oParser = new MDBParser_1.default(req);
oParser.parse();
return [4 /*yield*/, oClient
.db(this.sDatabase)
.collection(oParser.getCollection())
.deleteOne(oParser.getFind())];
case 2:
oResult = _a.sent();
if (oResult.acknowledged) {
return [2 /*return*/, req.data];
}
else {
throw new Error("Failed to delete data");
}
return [2 /*return*/];
}
});
});
};
/**
* Check if a collection exists and create it if not in the MongoDB database
* @param sCollection The collection to check or create
*/
MDBHandler.prototype.checkOrCreateCollection = function (sCollection) {
return __awaiter(this, void 0, void 0, function () {
var oClient, aCollections, aNames;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.oDB.connect()];
case 1:
_a.sent();
oClient = this.oDB.get();
return [4 /*yield*/, oClient
.db(this.sDatabase)
.listCollections()
.toArray()];
case 2:
aCollections = _a.sent();
aNames = aCollections.map(function (oCollection) { return oCollection.name; });
if (!!aNames.includes(sCollection)) return [3 /*break*/, 4];
return [4 /*yield*/, oClient
.db(this.sDatabase)
.createCollection(sCollection)];
case 3:
_a.sent();
_a.label = 4;
case 4: return [2 /*return*/];
}
});
});
};
return MDBHandler;
}());
exports.default = MDBHandler;