@ords/modules/dist/database/mongo/database.mongo.map.express.js

Modules for ords-core microservices based upon proposals

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const core_1 = require("@ords/core");
const rxjs_1 = require("rxjs");
const express = require("express");
const bodyParser = require("body-parser");
/**
 * Express REST map connector
 */
class MapExpressDatabaseRest {
    /**
     * Construct new instance on the specific set of services
     */
    constructor(mserver, connector) {
        /**
         * Maps to instance of db
         */
        this.root = 'db';
        /**
         * Name mapping of HTTP
         */
        this.nameMap = {
            post: 'create',
            put: 'update',
            delete: 'delete',
            get: 'read',
            patch: 'patch'
        };
        // create router on instance should it map differently??
        connector.maps.push(express.Router().all('/db/:resource/', bodyParser.json(), this.bridge.bind(this)));
        // save instance ref
        this.msever = mserver;
    }
    /**
     * Forward the request and send back the response between the micro services
     */
    bridge(req, res) {
        // create package
        let requestPackage = {
            query: req.query,
            runValidations: true,
            resource: req.params.resource
        };
        // find the method
        req.method = req.method.toLowerCase();
        // set name
        let name = this.nameMap[req.method];
        // check if method requires body
        if (['patch', 'post', 'put'].indexOf(req.method) !== -1) {
            // merge files with body if any exists on key _files
            if (req.files != undefined) {
                // loop all files
                for (let file in req.files) {
                    //  save ref 
                    req.body['_files'][file] = req.files[file];
                }
            }
            // set reference to data
            requestPackage.data = req.body;
        }
        // create an observable request
        let request = {
            package: rxjs_1.Observable.pairs(requestPackage),
            auth: req.auth
        };
        // perform the action
        core_1.ShortenAct.tryCatch(this.msever, this.root, name, request, (err, out, meta) => {
            if (err) {
                res.status(404).send(err.toString());
            }
            else {
                // set header from meta
                Object.keys(meta).forEach((key) => {
                    // bind key values of meta
                    res.header(key, meta[key]);
                });
                // check datatype of results
                if (Number.isInteger(out)) {
                    res.send(out.toString());
                }
                else {
                    res.send(out);
                }
            }
        });
    }
}
exports.MapExpressDatabaseRest = MapExpressDatabaseRest;