Show in-app rating prompt

JournalApp/App.xaml.cs

@@ -17,7 +17,7 @@ public App()
 
     public static (DateTimeOffset LeftAt, DateOnly LastDate)? IndexDateState { get; set; }
 
-    public int LaunchCount
+    public static int LaunchCount
     {
         get => Preferences.Get("launches", 0);
         set => Preferences.Set("launches", value);

JournalApp/Components/Pages/Index.razor

@@ -10,6 +10,7 @@
 @inject KeyEventService KeyEventService
 @inject NavigationManager NavigationManager
 @inject IScrollManager ScrollManager
+@inject AppRatingService AppRatingService
 
 <div class="page-title">
 	<div class="page-header">
@@ -291,6 +292,9 @@
 		logger.LogInformation("Saving new note");
 		note.Category.Points.Add(note);
 		await db.SaveChangesAsync();
+
+		// Better to ask for a rating after a pleasant event like finishing a note than obstructively like on launch.
+		await AppRatingService.TryShowInAppRatingDialog();
 	}
 
 	ValueTask OnLocationChanging(LocationChangingContext e)

JournalApp/Data/AppRatingService.cs

@@ -0,0 +1,46 @@
+using Plugin.Maui.AppRating;
+
+namespace JournalApp;
+
+public class AppRatingService(ILogger<AppRatingService> logger, IAppRating appRating)
+{
+    public async Task TryShowInAppRatingDialog()
+    {
+        if (!OperatingSystem.IsAndroid())
+        {
+            logger.LogDebug("Not on Android");
+            return;
+        }
+
+        if (App.LaunchCount < 20 || LastRatingDate + TimeSpan.FromDays(90) > DateTimeOffset.Now)
+        {
+            logger.LogDebug("Too soon");
+            return;
+        }
+
+        logger.LogInformation("Showing in-app rating prompt");
+        LastRatingDate = DateTimeOffset.Now;
+
+        // Doesn't do anything unless installed from the Play Store.
+        await appRating.PerformInAppRateAsync();
+    }
+
+    private DateTimeOffset LastRatingDate
+    {
+        get
+        {
+            var lastExportString = Preferences.Get("last_rating", null);
+
+            if (DateTimeOffset.TryParse(lastExportString, out var parsed))
+            {
+                return parsed;
+            }
+            else
+            {
+                LastRatingDate = default;
+                return default;
+            }
+        }
+        set => Preferences.Set("last_rating", value.ToString("O"));
+    }
+}

JournalApp/JournalApp.csproj

@@ -62,6 +62,7 @@
     <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiVersion)" />
     <PackageReference Include="MudBlazor" Version="6.15.0" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.133" PrivateAssets="All" />
+    <PackageReference Include="Plugin.Maui.AppRating" Version="1.1.0" />
   </ItemGroup>
 
 </Project>

JournalApp/MauiProgram.cs

@@ -1,6 +1,7 @@
 using CommunityToolkit.Maui;
 using MudBlazor;
 using MudBlazor.Services;
+using Plugin.Maui.AppRating;
 
 namespace JournalApp;
 
@@ -47,6 +48,8 @@ public static MauiApp CreateMauiApp()
         builder.Services.AddSingleton<KeyEventService>();
         builder.Services.AddSingleton(Share.Default);
         builder.Services.AddSingleton<AppThemeService>();
+        builder.Services.AddSingleton(AppRating.Default);
+        builder.Services.AddSingleton<AppRatingService>();
 
         // Seed the database.
         using var provider = builder.Services.BuildServiceProvider();

JournalApp/Resources/Raw/Credits.txt

@@ -965,6 +965,31 @@ SOFTWARE.
 
 
 
+https://github.com/FabriBertani/Plugin.Maui.AppRating/blob/main/LICENSE
+MIT License
+
+Copyright (c) 2023 Fabricio Bertani
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+
 Inspired by
 
 eMoods: https://play.google.com/store/apps/details?id=com.emoodtracker.wellness