(chore): Added GetUploadQueueStats.

PowerSync/PowerSync.Common/Client/PowerSyncDatabase.cs

@@ -420,6 +420,33 @@ await Database.WriteTransaction(async tx =>
         Closed = true;
     }
 
+    private record UploadQueueStatsResult(int size, int count);
+    /// <summary>
+    /// Get upload queue size estimate and count.
+    /// </summary>
+    public async Task<UploadQueueStats> GetUploadQueueStats(bool includeSize = false)
+    {
+        return await ReadTransaction(async tx =>
+        {
+            if (includeSize)
+            {
+                var result = await tx.Get<UploadQueueStatsResult>(
+                    $"SELECT SUM(cast(data as blob) + 20) as size, count(*) as count FROM {PSInternalTable.CRUD}"
+                );
+
+                return new UploadQueueStats(result.count, result.size);
+            }
+            else
+            {
+                var result = await tx.Get<UploadQueueStatsResult>(
+                    $"SELECT count(*) as count FROM {PSInternalTable.CRUD}"
+                );
+                return new UploadQueueStats(result.count);
+            }
+        });
+    }
+
+
     /// <summary>
     /// Get a batch of crud data to upload.
     /// <para />

Tests/PowerSync/PowerSync.Common.Tests/Client/PowerSyncDatabaseTests.cs

@@ -6,6 +6,9 @@ namespace PowerSync.Common.Tests.Client;
 
 using PowerSync.Common.Client;
 
+/// <summary>
+/// dotnet test -v n --framework net8.0 --filter "PowerSyncDatabaseTests"
+/// </summary>
 public class PowerSyncDatabaseTests : IAsyncLifetime
 {
     private PowerSyncDatabase db = default!;
@@ -454,4 +457,18 @@ await db.WriteTransaction(async tx =>
         var afterTx = await db.GetAll<object>("SELECT * FROM assets");
         Assert.Equal(2, afterTx.Length);
     }
+
+    [Fact(Timeout = 5000)]
+    public async Task GetUploadQueueStatsTest()
+    {
+        for (var i = 0; i < 100; i++)
+        {
+            await db.Execute("INSERT INTO assets (id) VALUES(?)", ["0" + i + "-writelock"]);
+        }
+
+        var stats = await db.GetUploadQueueStats(true);
+        Assert.Equal(100, stats.Count);
+        Assert.NotNull(stats.Size);
+    }
+
 }