1 files changed, 192 insertions, 0 deletions
diff --git a/vendor/github.com/avct/uasurfer/browser.go b/vendor/github.com/avct/uasurfer/browser.go
new file mode 100644
index 000000000..e156818ab
--- /dev/null
+++ b/vendor/github.com/avct/uasurfer/browser.go
@@ -0,0 +1,192 @@
+package uasurfer
+
+import (
+	"strings"
+)
+
+// Browser struct contains the lowercase name of the browser, along
+// with its browser version number. Browser are grouped together without
+// consideration for device. For example, Chrome (Chrome/43.0) and Chrome for iOS
+// (CriOS/43.0) would both return as "chrome" (name) and 43.0 (version). Similarly
+// Internet Explorer 11 and Edge 12 would return as "ie" and "11" or "12", respectively.
+// type Browser struct {
+// 		Name    BrowserName
+// 		Version struct {
+// 				Major int
+// 			Minor int
+// 			Patch int
+// 		}
+// }
+
+// Retrieve browser name from UA strings
+func (u *UserAgent) evalBrowserName(ua string) bool {
+	// Blackberry goes first because it reads as MSIE & Safari
+	if strings.Contains(ua, "blackberry") || strings.Contains(ua, "playbook") || strings.Contains(ua, "bb10") || strings.Contains(ua, "rim ") {
+		u.Browser.Name = BrowserBlackberry
+		return u.isBot()
+	}
+
+	if strings.Contains(ua, "applewebkit") {
+		switch {
+		case strings.Contains(ua, "opr/") || strings.Contains(ua, "opios/"):
+			u.Browser.Name = BrowserOpera
+
+		case strings.Contains(ua, "silk/"):
+			u.Browser.Name = BrowserSilk
+
+		case strings.Contains(ua, "edge/") || strings.Contains(ua, "iemobile/") || strings.Contains(ua, "msie "):
+			u.Browser.Name = BrowserIE
+
+		case strings.Contains(ua, "ucbrowser/") || strings.Contains(ua, "ucweb/"):
+			u.Browser.Name = BrowserUCBrowser
+
+		// Edge, Silk and other chrome-identifying browsers must evaluate before chrome, unless we want to add more overhead
+		case strings.Contains(ua, "chrome/") || strings.Contains(ua, "crios/") || strings.Contains(ua, "chromium/") || strings.Contains(ua, "crmo/"):
+			u.Browser.Name = BrowserChrome
+
+		case strings.Contains(ua, "android") && !strings.Contains(ua, "chrome/") && strings.Contains(ua, "version/") && !strings.Contains(ua, "like android"):
+			// Android WebView on Android >= 4.4 is purposefully being identified as Chrome above -- https://developer.chrome.com/multidevice/webview/overview
+			u.Browser.Name = BrowserAndroid
+
+		case strings.Contains(ua, "fxios"):
+			u.Browser.Name = BrowserFirefox
+
+		case strings.Contains(ua, " spotify/"):
+			u.Browser.Name = BrowserSpotify
+
+		// AppleBot uses webkit signature as well
+		case strings.Contains(ua, "applebot"):
+			u.Browser.Name = BrowserAppleBot
+
+		// presume it's safari unless an esoteric browser is being specified (webOSBrowser, SamsungBrowser, etc.)
+		case strings.Contains(ua, "like gecko") && strings.Contains(ua, "mozilla/") && strings.Contains(ua, "safari/") && !strings.Contains(ua, "linux") && !strings.Contains(ua, "android") && !strings.Contains(ua, "browser/") && !strings.Contains(ua, "os/"):
+			u.Browser.Name = BrowserSafari
+
+		// if we got this far and the device is iPhone or iPad, assume safari. Some agents don't actually contain the word "safari"
+		case strings.Contains(ua, "iphone") || strings.Contains(ua, "ipad"):
+			u.Browser.Name = BrowserSafari
+
+		// Google's search app on iPhone, leverages native Safari rather than Chrome
+		case strings.Contains(ua, " gsa/"):
+			u.Browser.Name = BrowserSafari
+
+		default:
+			goto notwebkit
+
+		}
+		return u.isBot()
+	}
+
+notwebkit:
+	switch {
+	case strings.Contains(ua, "msie") || strings.Contains(ua, "trident"):
+		u.Browser.Name = BrowserIE
+
+	case strings.Contains(ua, "gecko") && (strings.Contains(ua, "firefox") || strings.Contains(ua, "iceweasel") || strings.Contains(ua, "seamonkey") || strings.Contains(ua, "icecat")):
+		u.Browser.Name = BrowserFirefox
+
+	case strings.Contains(ua, "presto") || strings.Contains(ua, "opera"):
+		u.Browser.Name = BrowserOpera
+
+	case strings.Contains(ua, "ucbrowser"):
+		u.Browser.Name = BrowserUCBrowser
+
+	case strings.Contains(ua, "applebot"):
+		u.Browser.Name = BrowserAppleBot
+
+	case strings.Contains(ua, "baiduspider"):
+		u.Browser.Name = BrowserBaiduBot
+
+	case strings.Contains(ua, "adidxbot") || strings.Contains(ua, "bingbot") || strings.Contains(ua, "bingpreview"):
+		u.Browser.Name = BrowserBingBot
+
+	case strings.Contains(ua, "duckduckbot"):
+		u.Browser.Name = BrowserDuckDuckGoBot
+
+	case strings.Contains(ua, "facebot") || strings.Contains(ua, "facebookexternalhit"):
+		u.Browser.Name = BrowserFacebookBot
+
+	case strings.Contains(ua, "googlebot"):
+		u.Browser.Name = BrowserGoogleBot
+
+	case strings.Contains(ua, "linkedinbot"):
+		u.Browser.Name = BrowserLinkedInBot
+
+	case strings.Contains(ua, "msnbot"):
+		u.Browser.Name = BrowserMsnBot
+
+	case strings.Contains(ua, "pingdom.com_bot"):
+		u.Browser.Name = BrowserPingdomBot
+
+	case strings.Contains(ua, "twitterbot"):
+		u.Browser.Name = BrowserTwitterBot
+
+	case strings.Contains(ua, "yandex") || strings.Contains(ua, "yadirectfetcher"):
+		u.Browser.Name = BrowserYandexBot
+
+	case strings.Contains(ua, "yahoo"):
+		u.Browser.Name = BrowserYahooBot
+
+	case strings.Contains(ua, "phantomjs"):
+		u.Browser.Name = BrowserBot
+
+	default:
+		u.Browser.Name = BrowserUnknown
+
+	}
+
+	return u.isBot()
+}
+
+// Retrieve browser version
+// Methods used in order:
+// 1st: look for generic version/#
+// 2nd: look for browser-specific instructions (e.g. chrome/34)
+// 3rd: infer from OS (iOS only)
+func (u *UserAgent) evalBrowserVersion(ua string) {
+	// if there is a 'version/#' attribute with numeric version, use it -- except for Chrome since Android vendors sometimes hijack version/#
+	if u.Browser.Name != BrowserChrome && u.Browser.Version.findVersionNumber(ua, "version/") {
+		return
+	}
+
+	switch u.Browser.Name {
+	case BrowserChrome:
+		// match both chrome and crios
+		_ = u.Browser.Version.findVersionNumber(ua, "chrome/") || u.Browser.Version.findVersionNumber(ua, "crios/") || u.Browser.Version.findVersionNumber(ua, "crmo/")
+
+	case BrowserIE:
+		if u.Browser.Version.findVersionNumber(ua, "msie ") || u.Browser.Version.findVersionNumber(ua, "edge/") {
+			return
+		}
+
+		// get MSIE version from trident version https://en.wikipedia.org/wiki/Trident_(layout_engine)
+		if u.Browser.Version.findVersionNumber(ua, "trident/") {
+			// convert trident versions 3-7 to MSIE version
+			if (u.Browser.Version.Major >= 3) && (u.Browser.Version.Major <= 7) {
+				u.Browser.Version.Major += 4
+			}
+		}
+
+	case BrowserFirefox:
+		_ = u.Browser.Version.findVersionNumber(ua, "firefox/") || u.Browser.Version.findVersionNumber(ua, "fxios/")
+
+	case BrowserSafari: // executes typically if we're on iOS and not using a familiar browser
+		u.Browser.Version = u.OS.Version
+		// early Safari used a version number +1 to OS version
+		if (u.Browser.Version.Major <= 3) && (u.Browser.Version.Major >= 1) {
+			u.Browser.Version.Major++
+		}
+
+	case BrowserUCBrowser:
+		_ = u.Browser.Version.findVersionNumber(ua, "ucbrowser/")
+
+	case BrowserOpera:
+		_ = u.Browser.Version.findVersionNumber(ua, "opr/") || u.Browser.Version.findVersionNumber(ua, "opios/") || u.Browser.Version.findVersionNumber(ua, "opera/")
+
+	case BrowserSilk:
+		_ = u.Browser.Version.findVersionNumber(ua, "silk/")
+
+	case BrowserSpotify:
+		_ = u.Browser.Version.findVersionNumber(ua, "spotify/")
+	}
+}