litejs/lib/ua.js

Single-page application framework

/*! litejs.com/MIT-LICENSE.txt */

!function(exports) {
	// http://www.zytrax.com/tech/web/mobile_ids.html
	exports.ua = parse

	var re = /(\w+)(?:\/| )(\S+)(?:\s*\((.+?)\))?/g
	, MOBILE = "Mobile"
	, TABLET = "Tablet"
	, DESKTOP = "Desktop"
	, SMART_TV = "SmartTV"
	, browsers = [
		"AmigaVoyager",
		"Opera",
		"Firefox",
		"Edge",
		"Chrome",
		"Android",
		"Safari",
		"IE",
		"MSIE"
	]
	, alias = {
		CriOS: "Chrome",
		FxiOS: "Firefox",
		OPiOS: "Opera",
		MSIE: "IE",
		AppleWebKit: "Safari",
		Macintosh: "OS X"
	}
	, osList = [
		"AmigaOS",
		"Windows",
		"Android",
		/iP(ad|od|hone)/, "iOS",
		"Macintosh",
		"Tizen",
		/(?:web|hpw)[o0]s/i, "webOS",
		/CrOS/, "Chromium OS",
		"Linux",
		"Fuchsia"
	]
	, ffOs = {
		"18.0": "1.0.1",
		"18.1": "1.1",
		"26.0": "1.2",
		"28.0": "1.3",
		"30.0": "1.4",
		"32.0": "2.0",
		"34.0": "2.1",
		"37": "2.2",
		"44": "2.5"
	}
	, winVer = {
		"4.90":"ME",
		"5.0":"2000",
		"5.1":"XP",
		"5.2":"XP",
		"6.0":"Vista",
		"6.1":"7",
		"6.2":"8",
		"6.3":"8.1",
		"6.4":"10"
	}

	function parse(str) {
		var _device, match, spi
		, sp = ""
		, map = {}

		for (; match = re.exec(str);) {
			spi = map[alias[match[1]] || match[1]] = map[match[1]] = {
				name: alias[match[1]] || match[1],
				ver: match[2]
			}
			if (match[3]) {
				spi.sub = match[3]
				if (sp == "") {
					sp = match[3].split(/(?:x86_64|[\/;\s])+/)
				}
			}
		}
		spi = sp.indexOf.bind(sp)

		return {
			os: scan(osList),
			browser: scan(browsers),
			device: _device || (
				map.Mobile || spi(MOBILE) > -1 ? MOBILE :
				spi(TABLET) > -1 || spi("Android") > -1 ? TABLET :
				// On Desktop, geckotrail is the fixed string "20100101"
				map.Gecko && map.Gecko.ver == "20100101" ||
				map.Firefox ? DESKTOP :
				"?"
			)
		}

		function scan(list) {
			for (var match, name, t, i = 0, len = list.length; !match && i < len; ) {
				t = alias[name = list[i++]]
				if (typeof name !== "string") {
					if (match = name.exec(str)) {
						t = alias[name = match[0]] = list[i++]
					} else {
						name = list[i++]
					}
				}
				if (match = map[name]) {
					if (name == "Edge" && match.ver < 42) {
						match.ver = "" + (parseFloat(match.ver) + 25)
					}
					if (name == "Safari") {
						t = parseInt((map.AppleWebKit || match).ver)
						match.ver = (
							t < 100 ? "1.0" :
							t < 124 ? "1.1" :
							t < 312 ? "1.2" :
							t < 412 ? "1.3" :
							t < 420 ? "2.0" :
							map.Version ? map.Version.ver :
							match.ver
						)
					}
				} else if ((idx = spi(t == "iOS" || t == "OS X" ? "OS" : name)) > -1) {
					match = {
						name: alias[name] || name
					}
					if (name == "Android") {
						if (list == browsers && map.Version) {
							match.name += " Browser"
							match.ver = map.Version.ver
							break
						}
					}
					if (name == "Windows") {
						_device = DESKTOP
						if (sp[idx + 1] == "ME") {
							match.ver = "ME"
							break
						}
						if (t = spi("NT") + 1 || spi("9x") + 1) idx = t - 1
						t = sp[idx + 1]
						if (t == "Phone" || t == MOBILE || t == "CE") {
							match.name += " " + t
							idx += 1 + (sp[idx + 2] == "OS")
							_device = MOBILE
						} else {
							t = name
						}
					}
					if (parseFloat(sp[++idx]) || parseFloat(sp[++idx])) {
						match.ver = name === t && winVer[sp[idx]] || sp[idx].replace(/_/g, ".")
					}
					if (t === "iOS") {
						_device = name == "iPad" ? TABLET : MOBILE
					}
					if (match.name === "webOS") {
						_device = SMART_TV
					}
				}
			}
			if (!match) {
				if (list == osList) {
					if (map.Gecko) match = {
						name: "Firefox OS",
						ver: ffOs[map.Gecko.ver] || "?"
					}
				}
			}
			if (match && match.ver) {
				match.full = match.ver
				match.ver = match.ver.split(".").shift()
			}
			return match || {name: "?"}
		}
	}
}(this)