almost ready

BlueLaminate/BlueLaminate.EFCore/Data/SkinTrackerDbContext.cs

@@ -23,6 +23,8 @@ public class SkinTrackerDbContext : DbContext
     public DbSet<Collection> Collections => Set<Collection>();
     public DbSet<Skin> Skins => Set<Skin>();
     public DbSet<SkinCondition> SkinConditions => Set<SkinCondition>();
+    public DbSet<SkinSweep> SkinSweeps => Set<SkinSweep>();
+    public DbSet<SkinConditionSweep> SkinConditionSweeps => Set<SkinConditionSweep>();
     public DbSet<SteamUser> SteamUsers => Set<SteamUser>();
     public DbSet<SkinInstance> SkinInstances => Set<SkinInstance>();
     public DbSet<InventoryItem> InventoryItems => Set<InventoryItem>();
@@ -31,6 +33,7 @@ public class SkinTrackerDbContext : DbContext
     public DbSet<PriceHistory> PriceHistories => Set<PriceHistory>();
     public DbSet<Listing> Listings => Set<Listing>();
     public DbSet<CsMoneyListing> CsMoneyListings => Set<CsMoneyListing>();
+    public DbSet<SkinLandListing> SkinLandListings => Set<SkinLandListing>();
 
     /// <summary>Read-only cross-market view UNIONing the per-market listing tables.</summary>
     public DbSet<MarketListing> MarketListings => Set<MarketListing>();
@@ -47,6 +50,8 @@ public class SkinTrackerDbContext : DbContext
         modelBuilder.ApplyConfiguration(new CollectionConfiguration());
         modelBuilder.ApplyConfiguration(new SkinConfiguration());
         modelBuilder.ApplyConfiguration(new SkinConditionConfiguration());
+        modelBuilder.ApplyConfiguration(new SkinSweepConfiguration());
+        modelBuilder.ApplyConfiguration(new SkinConditionSweepConfiguration());
         modelBuilder.ApplyConfiguration(new SteamUserConfiguration());
         modelBuilder.ApplyConfiguration(new SkinInstanceConfiguration());
         modelBuilder.ApplyConfiguration(new InventoryItemConfiguration());
@@ -55,6 +60,7 @@ public class SkinTrackerDbContext : DbContext
         modelBuilder.ApplyConfiguration(new PriceHistoryConfiguration());
         modelBuilder.ApplyConfiguration(new ListingConfiguration());
         modelBuilder.ApplyConfiguration(new CsMoneyListingConfiguration());
+        modelBuilder.ApplyConfiguration(new SkinLandListingConfiguration());
         modelBuilder.ApplyConfiguration(new MarketListingConfiguration());
     }
 }

BlueLaminate/BlueLaminate.EFCore/Data/SweepCheckpoints.cs

@@ -0,0 +1,64 @@
+using BlueLaminate.EFCore.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace BlueLaminate.EFCore.Data;
+
+/// <summary>
+/// Write helpers for the per-site sweep checkpoints (<see cref="SkinSweep"/> /
+/// <see cref="SkinConditionSweep"/>). Each marketplace sweeper stamps its own row
+/// keyed by <c>(entity, source)</c>, so a band swept on one site is still "never
+/// swept" on another. Adding a new site means a new <see cref="SweepSource"/>
+/// constant — no schema changes.
+/// <para>
+/// Reads stay inline in the sweep queries (a correlated subquery over the navigation
+/// for the relevant <c>Source</c>) so EF can translate and order by them server-side.
+/// </para>
+/// </summary>
+public static class SweepCheckpoints
+{
+    /// <summary>
+    /// Record that <paramref name="source"/> just swept this wear band. Upserts the
+    /// single (condition, source) row via the change tracker; the caller persists with
+    /// <see cref="DbContext.SaveChangesAsync"/>.
+    /// </summary>
+    public static async Task StampConditionAsync(
+        SkinTrackerDbContext db, int conditionId, string source, DateTimeOffset sweptAt, CancellationToken ct)
+    {
+        var existing = await db.SkinConditionSweeps
+            .FirstOrDefaultAsync(s => s.SkinConditionId == conditionId && s.Source == source, ct);
+        if (existing is null)
+        {
+            db.SkinConditionSweeps.Add(new SkinConditionSweep
+            {
+                SkinConditionId = conditionId,
+                Source = source,
+                SweptAt = sweptAt,
+            });
+        }
+        else
+        {
+            existing.SweptAt = sweptAt;
+        }
+    }
+
+    /// <summary>As <see cref="StampConditionAsync"/>, for a whole-skin unit (no wear bands).</summary>
+    public static async Task StampSkinAsync(
+        SkinTrackerDbContext db, int skinId, string source, DateTimeOffset sweptAt, CancellationToken ct)
+    {
+        var existing = await db.SkinSweeps
+            .FirstOrDefaultAsync(s => s.SkinId == skinId && s.Source == source, ct);
+        if (existing is null)
+        {
+            db.SkinSweeps.Add(new SkinSweep
+            {
+                SkinId = skinId,
+                Source = source,
+                SweptAt = sweptAt,
+            });
+        }
+        else
+        {
+            existing.SweptAt = sweptAt;
+        }
+    }
+}