Add version check/download UI in about box.

1 files changed, 94 insertions, 11 deletions

diff --git a/Hotline/macOS/AboutView.swift b/Hotline/macOS/AboutView.swift
index 378385a..acf79b5 100644
--- a/Hotline/macOS/AboutView.swift
+++ b/Hotline/macOS/AboutView.swift
@@ -1,38 +1,121 @@
 import SwiftUI
 
+enum VersionCheckState {
+  case needToCheck
+  case checking
+  case upToDate
+  case updateAvailable(version: String)
+}
+
 struct AboutView: View {
   @Environment(\.openURL) private var openURL
   
+  @State private var versionCheck: VersionCheckState = .needToCheck
+  @State private var downloadURL: String = "https://github.com/mierau/hotline/releases/latest"
+  
   var body: some View {
-    VStack(alignment: .center) {
+    VStack(alignment: .center, spacing: 0) {
       Spacer()
+      
       Image("About Hotline")
         .padding(.top, 32)
+      
       Text("Hotline")
         .font(.title)
         .fontWeight(.semibold)
         .padding(.top, 16)
+        .foregroundColor(.white)
+      
       let appDetails = getAppVersionAndBuild()
-      Text("\(appDetails.version)b\(appDetails.build)")
+      Text("\(String(format: "%.1f", appDetails.version))b\(appDetails.build)")
         .fontWeight(.semibold)
+        .foregroundColor(.white)
         .opacity(0.6)
-      Button("Download Latest") {
-        if let url = URL(string: "https://github.com/mierau/hotline/releases/latest") {
-          openURL(url)
+      
+      HStack(alignment: .center) {
+        switch versionCheck {
+        case .needToCheck:
+          Button("Check for Updates") {
+            Task {
+              await checkForUpdate()
+            }
+          }
+          .controlSize(.regular)
+        case .checking:
+          HStack(spacing: 8) {
+            ProgressView()
+              .controlSize(.small)
+              .tint(.white)
+            Text("Checking for updates...")
+              .fontWeight(.semibold)
+              .foregroundStyle(.white)
+          }
+        case .upToDate:
+          Label("Hotline is up to date.", systemImage: "checkmark.circle.fill")
+            .foregroundStyle(.white)
+            .fontWeight(.semibold)
+            .tint(.white)
+            .onTapGesture {
+              versionCheck = .needToCheck
+            }
+        case .updateAvailable(let version):
+          Button("Download Latest \(version)") {
+            if let url = URL(string: downloadURL) {
+              openURL(url)
+            }
+          }
+          .controlSize(.regular)
         }
       }
-      .controlSize(.large)
-      .padding(.top, 16)
+      .frame(height: 40)
+      .padding(.top, 8)
+
       Spacer()
     }
     .frame(width: 300, height: 400)
     .ignoresSafeArea()
   }
   
-  func getAppVersionAndBuild() -> (version: String, build: String) {
-    let infoDictionary = Bundle.main.infoDictionary
-    let version = infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown"
-    let build = infoDictionary?["CFBundleVersion"] as? String ?? "Unknown"
+  func checkForUpdate() async {
+    let appDetails = getAppVersionAndBuild()
+    
+    self.versionCheck = .checking
+    
+    do {
+      let url = URL(string: "https://api.github.com/repos/mierau/hotline/releases/latest")!
+      let (data, _) = try await URLSession.shared.data(from: url)
+      let versionExpression = /^([0-9\.]+)beta([0-9]+)/
+      
+      if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any],
+         let tagName = json["tag_name"] as? String,
+         let assets = json["assets"] as? [[String: Any]],
+         let firstAsset = assets.first,
+         let assetDownloadURL = firstAsset["browser_download_url"] as? String,
+         let versionMatches = try? versionExpression.wholeMatch(in: tagName) {
+        if let versionNumber = Double(versionMatches.1),
+           let buildNumber = Int(versionMatches.2),
+           versionNumber > appDetails.version || buildNumber > appDetails.build {
+            let versionString = "\(versionMatches.1)b\(versionMatches.2)"
+            self.versionCheck = .updateAvailable(version: versionString)
+            downloadURL = assetDownloadURL
+        }
+        else {
+          self.versionCheck = .upToDate
+        }
+      }
+      else {
+        self.versionCheck = .needToCheck
+      }
+    }
+    catch {
+      self.versionCheck = .needToCheck
+    }
+  }
+  
+  func getAppVersionAndBuild() -> (version: Double, build: Int) {
+    let infoDictionary = Bundle.main.infoDictionary!
+    let version = Double(infoDictionary["CFBundleShortVersionString"]! as! String)!
+    let build = Int(infoDictionary["CFBundleVersion"]! as! String)!
     return (version, build)
   }
 }