Allow text file editing

CHDataManagement/Views/Files/TextFileContentView.swift

@@ -8,31 +8,65 @@ struct TextFileContentView: View {
     @State
     private var fileContent: String = ""
 
+    @State
+    private var loadedFile: String?
+
     var body: some View {
-        if fileContent != "" {
-            TextEditor(text: $fileContent)
-                .font(.body.monospaced())
-                .textEditorStyle(.plain)
-                //.background(.clear)
-        } else {
-            VStack {
+        VStack {
+            if fileContent != "" {
+                HStack {
+                    Button("Reload", action: reload)
+                    Button("Save", action: save)
+                    Spacer()
+                }
+                TextEditor(text: $fileContent)
+                    .font(.body.monospaced())
+                    .textEditorStyle(.plain)
+                    .foregroundStyle(.primary)
+            } else {
                 Image(systemSymbol: .docText)
                     .resizable()
                     .aspectRatio(contentMode: .fit)
                     .frame(width: 150)
-                Text("No preview available")
+                Text("No preview available or empty file")
                     .font(.title)
             }
-            .foregroundStyle(.secondary)
-            .onAppear(perform: loadFileContent)
         }
+        .foregroundStyle(.secondary)
+        .onAppear(perform: loadFileContent)
+        .onDisappear(perform: save)
     }
 
     private func loadFileContent() {
         guard fileContent == "" else {
             return
         }
+        reload()
+    }
+
+    private func reload() {
         fileContent = file.textContent()
+        loadedFile = file.id
         print("Loaded content of file \(file.id)")
     }
+
+    private func save() {
+        guard let loadedFile else {
+            print("[ERROR] Text File View: No file loaded to save")
+            return
+        }
+        guard loadedFile == file.id else {
+            print("[ERROR] Text File View: Not saving since file changed")
+            return
+        }
+        guard fileContent != "" else {
+            print("Text File View: Not saving empty file \(file.id)")
+            return
+        }
+        guard file.save(textContent: fileContent) else {
+            print("[ERROR] Text File View: Failed to save file \(file.id)")
+            return
+        }
+        print("Text File View: Saved file \(file.id)")
+    }
 }