@arisan/data-api/lib/Utils.js

The Universal Database API Gateway for CLIO's Modules

'use strict';

//region 1. Platform Libraries
const ipaddr = require('ipaddr.js');
//endregion

const isValidStreamIndex = index => Number.isInteger(Number(index)) && Number(index) >= 0;

const isWithinValidPublicIpRange = publicIp => {
    const range = ipaddr.parse(publicIp).range();
    return !(range === 'broadcast' || range === 'linkLocal' || range === 'loopback' || range === 'multicast' || range === 'private' || range === 'reserved' || range === 'unspecified');
};

const isValidPublicIP = ip => {
    if (!ip) {
        return new Error('No Public IP');
    }
    if (!ipaddr.isValid(ip)) {
        return new Error(`Malformed Public IP ${ip}`);
    }
    if (!isWithinValidPublicIpRange(ip)) {
        return new Error(`Public IP in Invalid Range ${ip}`);
    }
    return true;
};

const stripUndefined = obj => {
    const result = obj;
    Object.keys(result).forEach(key => {
        if (result[key] && typeof result[key] === 'object') {
            stripUndefined(result[key]);
        } else if (result[key] === undefined) {
            delete result[key];
        }
    });
    return result;
};

const valueOf = (obj, ...args) => {
    let ctx = obj;
    return args.some((arg, index) => {
        const hasProperty = {}.hasOwnProperty.call(ctx, args[index]);
        ctx = ctx[args[index]];
        return !hasProperty;
    }) ? undefined : ctx;
};

module.exports = {
    isValidStreamIndex,
    isValidPublicIP,
    isWithinValidPublicIpRange,
    stripUndefined,
    valueOf
};

/**
 * @typedef  {object} Router
 * @property {*}      use
 * @property {*}      post
 * @property {*}      get
 * @property {*}      put
 * @property {*}      delete
 */

/**
 * @typedef  {object} RateControl
 * @property {number} bitrate_limit
 * @property {number} frame_rate_limit
 */

/**
 * @typedef  {object} H264
 * @property {string} h264_profile
 * @property {number} gov_length
 */

/**
 * @typedef  {object} VideoInfo
 * @property {number} index
 * @property {*}      start_time
 * @property {*}      end_time
 * @property {string} bucket_name
 * @property {string} object_name
 */

/**
 * @typedef  {object}      Stream
 * @property {string}      mjpg_url
 * @property {string}      rtsp_url
 * @property {number}      trigger_idle_duration
 * @property {number}      trigger_prealarm_duration
 * @property {number}      trigger_video_duration
 * @property {RateControl} rate_control
 * @property {H264}        h264
 * @property {VideoInfo}   video_info
 * @property {string[]}    triggered_streams
 */

/**
 * @typedef  {object} Camera
 * @property {string} username
 * @property {string} password
 * @property {string} public_address
 * @property {number} web_port
 */
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