From 96aa9a60a6d4fa1c54edb4adcf9fe339ef46766f Mon Sep 17 00:00:00 2001
From: Garth Vander Houwen <garthvh@yahoo.com>
Date: Mon, 10 Oct 2022 21:21:58 -0700
Subject: [PATCH] Decode qr code string

---
 Meshtastic/MeshtasticApp.swift                | 42 ++++++++++---------
 .../Views/Settings/SaveChannelQRCode.swift    | 26 ++++++++++--
 Meshtastic/Views/Settings/ShareChannels.swift |  2 +-
 3 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/Meshtastic/MeshtasticApp.swift b/Meshtastic/MeshtasticApp.swift
index 25e3cbce..a4f99ec7 100644
--- a/Meshtastic/MeshtasticApp.swift
+++ b/Meshtastic/MeshtasticApp.swift
@@ -42,8 +42,7 @@ struct MeshtasticAppleApp: App {
 				}
 			}
 			.sheet(isPresented: $saveChannels) {
-				
-				let channelSettingsString = incomingUrl?.absoluteString
+								
 				SaveChannelQRCode(channelHash: channelSettings ?? "Empty Channel URL")
 					.presentationDetents([.medium, .large])
 					.presentationDragIndicator(.visible)
@@ -60,6 +59,7 @@ struct MeshtasticAppleApp: App {
 					saveChannels = true
 					print("User wants to open a Channel Settings URL: \(incomingUrl?.absoluteString ?? "No QR Code Link")")
 				} else {
+					saveChannels = false
 					print("User wants to import a MBTILES offline map file: \(incomingUrl?.absoluteString ?? "No Tiles link")")
 				}
 
@@ -69,26 +69,28 @@ struct MeshtasticAppleApp: App {
 				let documentsDirectory = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first!
 				let destination = documentsDirectory.appendingPathComponent("offline_map.mbtiles", isDirectory: false)
 				
-				//do we need to delete an old one?
-				if (fileManager.fileExists(atPath: destination.path)) {
-					print("ℹ️ Found an old map file.  Deleting it")
-					try? fileManager.removeItem(atPath: destination.path)
-				}
-				
-				do {
-					try fileManager.copyItem(at: url, to: destination)
-				} catch {
-					print("Copy MB Tile file failed. Error: \(error)")
-				}
-				
-				if (fileManager.fileExists(atPath: destination.path)) {
-					print("ℹ️ Saved the map file")
+				if !saveChannels {
+					//do we need to delete an old one?
+					if (fileManager.fileExists(atPath: destination.path)) {
+						print("ℹ️ Found an old map file.  Deleting it")
+						try? fileManager.removeItem(atPath: destination.path)
+					}
 					
-					//need to tell the map view that it needs to update and try loading the new overlay
-					UserDefaults.standard.set(Date().timeIntervalSince1970, forKey: "lastUpdatedLocalMapFile")
+					do {
+						try fileManager.copyItem(at: url, to: destination)
+					} catch {
+						print("Copy MB Tile file failed. Error: \(error)")
+					}
 					
-				} else {
-					print("💥 Didn't save the map file")
+					if (fileManager.fileExists(atPath: destination.path)) {
+						print("ℹ️ Saved the map file")
+						
+						//need to tell the map view that it needs to update and try loading the new overlay
+						UserDefaults.standard.set(Date().timeIntervalSince1970, forKey: "lastUpdatedLocalMapFile")
+						
+					} else {
+						print("💥 Didn't save the map file")
+					}
 				}
 			})
 		}
diff --git a/Meshtastic/Views/Settings/SaveChannelQRCode.swift b/Meshtastic/Views/Settings/SaveChannelQRCode.swift
index cfb4e281..b9f1020d 100644
--- a/Meshtastic/Views/Settings/SaveChannelQRCode.swift
+++ b/Meshtastic/Views/Settings/SaveChannelQRCode.swift
@@ -9,7 +9,7 @@ import SwiftUI
 struct SaveChannelQRCode: View {
 	
 	var channelHash: String
-
+	
 	var body: some View {
 		
 		VStack {
@@ -17,22 +17,40 @@ struct SaveChannelQRCode: View {
 			Text("Save Channel Settings?")
 				.font(.title)
 			
-			Text("The settings embedded in this QR code will replace the current settings on your radio.")
+			Text("These settings will replace the current settings on your radio.")
 				.foregroundColor(.gray)
 				.font(.callout)
 				.padding()
 
 			Text(channelHash)
-				.font(.callout)
+				.font(.caption2)
 				.padding()
 			
-			Text("This does not work yet.")
+			Text("Error Message")
 				.font(.callout)
+				.foregroundColor(.red)
 				.padding()
 			
 			
 			Text("Swipe down to dismiss.")
 				.padding()
 		}
+		.onChange(of: channelHash) { newSettings in
+			
+			var decodedString = newSettings
+			if !decodedString.hasSuffix("==") {
+				decodedString = decodedString + "=="
+			}
+			
+			if let decodedData = Data(base64Encoded: decodedString) {
+				decodedString = String(data: decodedData, encoding: .utf8)!
+				do {
+					var channelSet: ChannelSet = try ChannelSet(serializedData: decodedData)
+					print(channelSet)
+				} catch {
+					print("Invalid Meshtastic QR Code Link")
+				}
+			}
+		}
 	}
 }
diff --git a/Meshtastic/Views/Settings/ShareChannels.swift b/Meshtastic/Views/Settings/ShareChannels.swift
index aaaf0081..48000f25 100644
--- a/Meshtastic/Views/Settings/ShareChannels.swift
+++ b/Meshtastic/Views/Settings/ShareChannels.swift
@@ -286,7 +286,7 @@ struct ShareChannels: View {
 		for ch in node!.myInfo!.channels!.array as! [ChannelEntity] {
 			if ch.role > 0 {
 				
-				if ch.index == 0 || ch.index == 1 && includeChannel1 || ch.index == 2 && includeChannel2 || ch.index == 3 && includeChannel3 ||
+				if ch.index == 0 && includeChannel0 || ch.index == 1 && includeChannel1 || ch.index == 2 && includeChannel2 || ch.index == 3 && includeChannel3 ||
 					ch.index == 4 && includeChannel4 || ch.index == 5 && includeChannel5 || ch.index == 6 && includeChannel6 || ch.index == 7 && includeChannel7   {
 					
 					var channelSettings = ChannelSettings()