Rework path storage, add start screen

CHDataManagement/Main/InitialSetupView.swift

@@ -1,8 +1,73 @@
 import SwiftUI
 
 struct InitialSetupView: View {
-    
+
+    @EnvironmentObject
+    private var content: Content
+
+    @Environment(\.dismiss)
+    private var dismiss
+
+    @State
+    private var message: String?
+
     var body: some View {
-        /*@START_MENU_TOKEN@*//*@PLACEHOLDER=Hello, world!@*/Text("Hello, world!")/*@END_MENU_TOKEN@*/
+        VStack {
+            Text("No Database Loaded")
+                .font(.title)
+                .padding()
+            Text("To start editing the content of a website, create a new database or load an existing one. Open a folder with an existing database, or choose an empty folder to create a new project.")
+                .multilineTextAlignment(.center)
+            Button("Select folder", action: selectContentPath)
+                .padding()
+            if let message {
+                Text(message)
+                    .padding(.bottom)
+            }
+        }
+        .padding()
+        .frame(maxWidth: 350)
+    }
+
+    private func selectContentPath() {
+        let panel = NSOpenPanel()
+        // Sets up so user can only select a single directory
+        panel.canChooseFiles = false
+        panel.canChooseDirectories = true
+        panel.allowsMultipleSelection = false
+        panel.showsHiddenFiles = false
+        panel.title = "Select the database folder"
+
+        let response = panel.runModal()
+        guard response == .OK else {
+            set(message: "Failed to select a folder: \(response)")
+            return
+        }
+        guard let url = panel.url else {
+            set(message: "No folder url found")
+            return
+        }
+
+        guard content.storage.save(contentPath: url) else {
+            set(message: "Failed to set content path")
+            return
+        }
+        print("Selected folder, initializing storage")
+        DispatchQueue.main.async {
+            do {
+                print("Loading disk content")
+                try content.loadFromDisk()
+            } catch {
+                set(message: "Failed to load database: \(error)")
+                return
+            }
+            dismiss()
+        }
+    }
+
+    private func set(message: String) {
+        DispatchQueue.main.async {
+            self.message = message
+        }
     }
 }