UserAgent.js

/**
 * Detect browser and os from UA
 */
const os = {
	"ipad" : "iPad",
	"ipod" : "iPod",
	"iphone" : "iPhone",
	"windows nt 10" : "Windows 10",
	"windows nt 6.1" : "Windows 7",
	"windows nt 6.2" : "Windows 8",
	"windows nt 6.3" : "Windows 8",
	"windows phone 10" : "Windows Mobile",
	"windows phone" : "Windows Phone",
	"windows" : "Windows",
	"android" : "Android",
	"mac" : "Mac",
	"ubuntu" : "Ubuntu",
	"linux" : "Linux",
	"bada" : "Bada",
	"meego" : "MeeGo",
};

const browser = {
	"crios" : "CriOS",
	"fxios" : "FxiOS",
	"wv" : "WebKit",
	"edge" : "EDGE",
	"chrome" : "Chrome",
	"firefox" : "Firefox",
	"msie" : "Internet Explorer",
	"opera" : "Opera",
	"trident" : "Trident",
	"safari" : "Safari",
};

const mobile = [
	'mobile', 'ipad', 'ipod', 'iphone'
];


class UserAgent {

	static parseUserAgent(user_agent) {
		return {
			"os" : UserAgent.getOs(user_agent),
			"browser" : UserAgent.getBrowser(user_agent),
			"mobile" : UserAgent.isMobile(user_agent)
		};
	};
	
	static getOs(user_agent) {
		for(let key in os) {
			if(user_agent.toLowerCase().indexOf(key) !== -1) {
				return os[key];
			}
		}
		return '';
	};

	static getBrowser(user_agent) {
		for(let key in browser) {
			if(user_agent.toLowerCase().indexOf(key) !== -1) {
				let regexp = new RegExp(".*(" + browser[key] + ")\/([0-9\.]+).*", 'i');
				return user_agent.replace(regexp, "$1/$2");
			}
		}
		return '';
	};

	static isMobile(user_agent) {
		for(let i = 0; i < mobile.length; i++) {
			if(user_agent.toLowerCase().indexOf(mobile[i]) !== -1) {
				return true;
			}
		}
		return false;
	};
};

exports.UserAgent = UserAgent;