Logging : Make it log to same file for a day...

Taggy/TaggyApp.swift

@@ -20,6 +20,9 @@ struct TaggyApp: App {
 
 	var viewModel = AGContentViewModel()
 
+	// Initing the log view model here so it's not created multiple times...
+	var logViewModel = TaggyLoggingViewModel()
+
 	var body: some Scene {
 
 		WindowGroup {
@@ -55,7 +58,7 @@ struct TaggyApp: App {
 		.keyboardShortcut("T", modifiers: [.command])
 
 		Window("Taggy Log", id: TaggyLogWindowName) {
-			TaggyLoggingView()
+			TaggyLoggingView(viewModel: logViewModel)
 		}
 		.keyboardShortcut("L", modifiers: [.command])
 

Taggy/Views/LogWindow/TaggyLoggingView.swift

@@ -10,7 +10,7 @@ import SwiftUI
 struct TaggyLoggingView: View {
 	@State var textLog: String = ""
 
-	@ObservedObject var viewModel = TaggyLoggingViewModel()
+	@ObservedObject var viewModel: TaggyLoggingViewModel
 
 	var body: some View {
 		VStack {
@@ -28,6 +28,6 @@ struct TaggyLoggingView: View {
 
 struct TaggyLoggingView_Previews: PreviewProvider {
 	static var previews: some View {
-		TaggyLoggingView()
+		TaggyLoggingView(viewModel: TaggyLoggingViewModel())
 	}
 }

Taggy/Views/LogWindow/TaggyLoggingViewModel.swift

@@ -18,6 +18,7 @@ class TaggyLoggingViewModel: ObservableObject {
 	private var messageCancellable: AnyCancellable?
 
 	init() {
+		loadCurrentLog()
 		messageCancellable = AGTaggyManager.shared.collector.$message
 			.receive(on: RunLoop.main)
 			.sink { [weak self] message in
@@ -36,19 +37,47 @@ class TaggyLoggingViewModel: ObservableObject {
 		let logMessage = String(format: "%@: %@\n" , dateFormatter.string(from: Date()), message)
 		textLog += logMessage
 
-		let caches = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask)
 
-		guard let bundleId = Bundle.mainBundleId else {
+		guard let logFileURL = logFileURL() else {
 			return
 		}
-
+
+		try? textLog.write(toFile: logFileURL.path, atomically: true, encoding: .utf8)		
+	}
+
+	func loadCurrentLog() {
+		guard let logFileURL = logFileURL() else {
+			return
+		}
+
+		do {
+			let logContents = try String(contentsOf: logFileURL)
+			textLog = logContents
+		}
+		catch {
+			// silently failing is not great.
+			// we just end up creating a new log so not the end of the world I think.
+		}
+	}
+
+	func logFileURL() -> URL? {
+
+		let caches = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask)
+
+		guard let bundleId = Bundle.mainBundleId else {
+			return nil
+		}
+
 		let dir = URL(fileURLWithFileSystemRepresentation: bundleId, isDirectory: true, relativeTo: caches.first)
 		try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
 
-		let logFile = URL(fileURLWithFileSystemRepresentation: "\(Date())-taggy.log", isDirectory: false, relativeTo: dir)
-
+		var dateFormatter = DateFormatter()
+		dateFormatter.dateFormat = "yyy-MM-dd"
+		let dateString = dateFormatter.string(from: Date())
+
+		let logFile = URL(fileURLWithFileSystemRepresentation: "\(dateString)-taggy.log", isDirectory: false, relativeTo: dir)
 
-		try? textLog.write(toFile: logFile.path, atomically: true, encoding: .utf8)		
+		return logFile
 	}
 
 }