node-red-contrib-dahua-device/dahua-device/dahua-device.js

A Node-RED integration of Dahua network devices (NVR, IP-Cameras)

const ipcamera = require('node-dahua-api');
const nodeStatus = require('./utils').nodeStatus;

module.exports = function (RED) {
    /**
     * @param config
     */
    function DahuaDeviceNode(config) {
        RED.nodes.createNode(this, config);
        const node = this;
        const device = RED.nodes.getNode(config.device);

        node.status({});
        nodeStatus(node, 'yellow', 'connecting...');

        const dahua = new ipcamera.dahua({
            host: device.ipaddress,
            port: device.port,
            user: device.credentials.username,
            pass: device.credentials.password,
            log: false,
        });

        dahua.on('connect', function (options) {
            nodeStatus(node, 'green', 'connected to ' + options.host);
        });

        dahua.on('error', function (error) {
            nodeStatus(node, 'red', 'error: ' + error);
        });

        dahua.on('end', function () {
            nodeStatus(node, 'yellow', 'disconnected');
        });

        dahua.on('alarm', function (code, action, index, metadata) {
            node.send({
                topic: [code, index, action].join('/'),
                payload: action,
                metadata,
                index,
                code,
            });
            nodeStatus(node, 'green', 'processed ' + code + ' event');
        });
    }

    RED.nodes.registerType('dahua-device', DahuaDeviceNode);
};