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Prefab/Data/Queries/EntityAuditQueries.cs

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+using Prefab.Domain.Common;
+
+namespace Prefab.Data.Queries;
+
+/// <summary>
+/// Provides reusable audit-related query filters for entity sets.
+/// </summary>
+public static class EntityAuditQueries
+{
+    /// <summary>
+    /// Filters entities created before the specified timestamp.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasCreateBefore(this IQueryable<IAudit> query, DateTime dateTime) => query.Where(x => x.CreatedOn < dateTime);
+
+    /// <summary>
+    /// Filters entities created after the specified timestamp.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasCreatedAfter(this IQueryable<IAudit> query, DateTime dateTime) => query.Where(x => x.CreatedOn > dateTime);
+
+    /// <summary>
+    /// Filters entities created between the specified start and end timestamps.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasCreatedBetween(this IQueryable<IAudit> query, DateTime start, DateTime end) => query.ThatWasCreatedAfter(start).ThatWasCreateBefore(end);
+
+    /// <summary>
+    /// Filters entities last modified before the specified timestamp.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasLastModifiedBefore(this IQueryable<IAudit> query, DateTime dateTime) => query.Where(x => x.LastModifiedOn < dateTime);
+
+    /// <summary>
+    /// Filters entities last modified after the specified timestamp.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasLastModifiedAfter(this IQueryable<IAudit> query, DateTime dateTime) => query.Where(x => x.LastModifiedOn > dateTime);
+
+    /// <summary>
+    /// Filters entities last modified between the specified start and end timestamps.
+    /// </summary>
+    public static IQueryable<IAudit> ThatWasLastModifiedBetween(this IQueryable<IAudit> query, DateTime start, DateTime end) => query.ThatWasLastModifiedAfter(start).ThatWasLastModifiedBefore(end);
+}