Tutorial Sheet (incl. Welcome message + Recordings introduction)

main/TBCMain.swift

@@ -5,13 +5,40 @@ class TBCMain: UITabBarController {
 	
 	override func viewDidLoad() {
 		super.viewDidLoad()
-//		perform(#selector(showWelcomeMessage), with: nil, afterDelay: 3)
 		NotifyVPNStateChanged.observe(call: #selector(vpnStateChanged(_:)), on: self)
 		changedState(currentVPNState)
+		
+		if !UserDefaults.standard.bool(forKey: "didShowTutorialAppWelcome") {
+			self.perform(#selector(showWelcomeMessage), with: nil, afterDelay: 0.5)
+		}
 	}
 	
 	@objc func showWelcomeMessage() {
-		performSegue(withIdentifier: "welcome", sender: nil)
+		let x = TutorialSheet()
+		x.addSheet().addArrangedSubview(QuickUI.text(attributed: NSMutableAttributedString()
+			.h1("Welcome\n")
+			.normal("\nAppCheck helps you identify which applications communicate with third parties. " +
+				"It does so by logging network requests. " +
+				"AppCheck learns only the destination addresses, not the actual data that is exchanged." +
+				"\n\n" +
+				"Your data belongs to you. " +
+				"Therefore, monitoring and analysis take place on your device only. " +
+				"The app does not share any data with us or any other third-party. " +
+				"Unless you choose to.")
+		))
+		x.addSheet().addArrangedSubview(QuickUI.text(attributed: NSMutableAttributedString()
+			.h1("How it works\n")
+			.normal("\nAppCheck creates a local VPN tunnel to intercept all network connections. " +
+				"For each connection AppCheck looks into the DNS headers only, namely the domain names. " +
+				"\n" +
+				"These domain names are logged in the background while the VPN is active. " +
+				"That means, AppCheck does not have to be active in the foreground. " +
+				"You can close the app and come back later to see the results."
+			)
+		))
+		x.present {
+			UserDefaults.standard.set(true, forKey: "didShowTutorialAppWelcome")
+		}
 	}
 	
 	@objc func vpnStateChanged(_ notification: Notification) {