@arisan/data-api/lib/routers/mountNewRecorder.js

The Universal Database API Gateway for CLIO's Modules

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = mountNewRecorder;

var _express = require('express');

var _express2 = _interopRequireDefault(_express);

var _checkObjectID = require('../middleware/checkObjectID');

var _checkObjectID2 = _interopRequireDefault(_checkObjectID);

var _checkStreamIndex = require('../middleware/checkStreamIndex');

var _checkStreamIndex2 = _interopRequireDefault(_checkStreamIndex);

var _DataAPI = require('../DataAPI');

var _DataAPI2 = _interopRequireDefault(_DataAPI);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

//endregion

//region 1. Platform Libraries
const context = {
    router: _express2.default.Router({ mergeParams: true }),
    recorders: null,
    logger: null
};
//endregion

//region 2. Project Libraries


context.router.get('/', _checkObjectID2.default);
context.router.get('/', _checkStreamIndex2.default);
context.router.get('/:module', (req, res) => {
    const log = (lvl, msg) => context.logger.log(lvl, msg, { tags: `GET ${req.originalUrl}` });
    log('debug', JSON.stringify(req.params, null, 2));
    if (['archive', 'live', 'event'].indexOf(req.params.module) === -1) {
        const message = 'Invalid Module Name';
        log('error', message);
        res.status(400).send(message);
        return;
    }
    const expired = new Date(Date.now() - (_DataAPI2.default.heartbeatInterval + 3) * 1000);
    context.recorders.find({
        module: req.params.module,
        updated: { $gt: expired }
    }, {
        fields: { load_history: 0 },
        sort: { cpu_load: 1 }
    }).toArray((findErr, activeRecorders) => {
        if (findErr) {
            log('error', findErr.message);
            res.status(500).send(findErr.message);
            return;
        }
        if (activeRecorders.length === 0) {
            const message = `${req.params.module.toUpperCase()} Recorder Not Available`;
            log('error', message);
            res.status(500).send(message);
            return;
        }
        const max = Math.floor(activeRecorders.length / 2);
        const selected = activeRecorders[Math.floor(Math.random() * max)];
        const reply = {
            host: selected.private_ip,
            port: parseInt(selected.port, 10)
        };
        log('debug', JSON.stringify(reply, null, 2));
        log('info', '200 OK');
        res.status(200).send(reply);
    });
});

//noinspection JSUnusedGlobalSymbols
/**
 * Mount router for /c/:/s/:/new-recorder
 * @param {object}         options          Options
 * @param {object}         options.app      Express App
 * @param {MongoClient.Db} options.database Associated Database
 * @param {winston.Logger} options.logger   Logger
 */
function mountNewRecorder(options) {
    context.logger = options.logger;
    const log = (lvl, msg) => context.logger.log(lvl, msg, { tags: 'mountNewRecorder' });
    log('debug', 'Mounting router for /c/:/s/:/new-recorder....');
    options.app.use('/cameras/:id/streams/:index/new-recorder', context.router);
    context.recorders = options.database.collection('recorders');
    log('info', 'Router for /c/:/s/:/new-recorder Mounted');
}
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