Add meta-sqlite to adwaita-swift

Package.swift

@@ -24,6 +24,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/AparokshaUI/Meta", branch: "main"),
+        .package(url: "https://github.com/AparokshaUI/meta-sqlite", branch: "main"),
         .package(
             url: "https://github.com/david-swift/LevenshteinTransformations",
             from: "0.1.1"
@@ -40,7 +41,8 @@ let package = Package(
             dependencies: [
                 "CAdw",
                 .product(name: "LevenshteinTransformations", package: "LevenshteinTransformations"),
-                .product(name: "Meta", package: "Meta")
+                .product(name: "Meta", package: "Meta"),
+                .product(name: "MetaSQLite", package: "meta-sqlite")
             ]
         ),
         .executableTarget(

Sources/Adwaita/Model/AdwaitaApp.swift

@@ -6,7 +6,9 @@
 //
 
 import CAdw
+import Foundation
 @_exported import Meta
+@_exported import MetaSQLite
 
 /// The Meta app storage for the Adwaita backend.
 public class AdwaitaApp: AppStorage {
@@ -31,6 +33,7 @@ public class AdwaitaApp: AppStorage {
     /// - Parameter id: The identifier.
     public required init(id: String) {
         pointer = adw_application_new(id, G_APPLICATION_DEFAULT_FLAGS)?.cast()
+        DatabaseInformation.setPath(Self.userDataDir().appendingPathComponent("data.sqlite").path)
     }
 
     /// Copy a string to the clipboard.
@@ -39,6 +42,12 @@ public class AdwaitaApp: AppStorage {
         gdk_clipboard_set_text(clipboard, text)
     }
 
+    /// The directory used for storing user data.
+    /// - Returns: The URL.
+    public static func userDataDir() -> URL {
+        .init(fileURLWithPath: .init(cString: g_get_user_data_dir()))
+    }
+
     /// Execute the app.
     /// - Parameter setup: Set the scene elements up.
     public func run(setup: @escaping () -> Void) {

Sources/Demo/CounterDemo.swift

@@ -11,7 +11,8 @@ import Adwaita
 
 struct CounterDemo: View {
 
-    @State private var count = 0
+    @State("count")
+    private var count = 0
 
     var view: Body {
         VStack {

Sources/Demo/Demo.swift

@@ -68,7 +68,8 @@ struct Demo: App {
 
     struct DemoContent: WindowView {
 
-        @State private var selection: Page = .welcome
+        @State("selection")
+        private var selection: Page = .welcome
         @State private var toast: Signal = .init()
         @State private var sidebarVisible = true
         @State private var width = 650