Reorg code, move services

src/Umbraco.Core/Services/Implement/RepositoryService.cs

@@ -0,0 +1,27 @@
+using System;
+using Umbraco.Core.Events;
+using Umbraco.Core.Logging;
+using Umbraco.Core.Persistence.Querying;
+using Umbraco.Core.Scoping;
+
+namespace Umbraco.Core.Services.Implement
+{
+    /// <summary>
+    /// Represents a service that works on top of repositories.
+    /// </summary>
+    public abstract class RepositoryService : IService
+    {
+        protected ILogger Logger { get; }
+        protected IEventMessagesFactory EventMessagesFactory { get; }
+        protected IScopeProvider ScopeProvider { get; }
+
+        protected RepositoryService(IScopeProvider provider, ILogger logger, IEventMessagesFactory eventMessagesFactory)
+        {
+            Logger = logger ?? throw new ArgumentNullException(nameof(logger));
+            EventMessagesFactory = eventMessagesFactory ?? throw new ArgumentNullException(nameof(eventMessagesFactory));
+            ScopeProvider = provider ?? throw new ArgumentNullException(nameof(provider));
+        }
+
+        protected IQuery<T> Query<T>() => ScopeProvider.SqlContext.Query<T>();
+    }
+}