Scaffolded project

Services/Settings/IAppSettingsService.cs

@@ -0,0 +1,10 @@
+using WorkTracker.Domain;
+
+namespace WorkTracker.Services.Settings;
+
+public interface IAppSettingsService
+{
+    Task<AppSettingsDocument> GetAsync(CancellationToken cancellationToken = default);
+
+    Task<AppSettingsDocument> SaveAsync(AppSettingsDocument settings, CancellationToken cancellationToken = default);
+}

Services/Settings/MongoAppSettingsService.cs

@@ -0,0 +1,44 @@
+using MongoDB.Driver;
+using WorkTracker.Domain;
+
+namespace WorkTracker.Services.Settings;
+
+public sealed class MongoAppSettingsService : IAppSettingsService
+{
+    private const string DefaultSettingsId = "global";
+    private readonly IMongoCollection<AppSettingsDocument> appSettingsCollection;
+
+    public MongoAppSettingsService(IMongoDatabase database)
+    {
+        appSettingsCollection = database.GetCollection<AppSettingsDocument>("app_settings");
+    }
+
+    public async Task<AppSettingsDocument> GetAsync(CancellationToken cancellationToken = default)
+    {
+        var filter = Builders<AppSettingsDocument>.Filter.Eq(x => x.Id, DefaultSettingsId);
+        var settings = await appSettingsCollection.Find(filter).FirstOrDefaultAsync(cancellationToken);
+
+        if (settings is not null)
+        {
+            return settings;
+        }
+
+        var defaults = new AppSettingsDocument();
+        await appSettingsCollection.InsertOneAsync(defaults, cancellationToken: cancellationToken);
+        return defaults;
+    }
+
+    public async Task<AppSettingsDocument> SaveAsync(AppSettingsDocument settings, CancellationToken cancellationToken = default)
+    {
+        var existing = await GetAsync(cancellationToken);
+
+        settings.Id = DefaultSettingsId;
+        settings.CreatedAtUtc = existing.CreatedAtUtc;
+        settings.UpdatedAtUtc = DateTimeOffset.UtcNow;
+
+        var filter = Builders<AppSettingsDocument>.Filter.Eq(x => x.Id, DefaultSettingsId);
+        await appSettingsCollection.ReplaceOneAsync(filter, settings, new ReplaceOptions { IsUpsert = true }, cancellationToken);
+
+        return settings;
+    }
+}