Generalized Store System (#10201)

Content.Server/Store/Conditions/BuyerWhitelistCondition.cs

@@ -0,0 +1,41 @@
+using Content.Shared.Store;
+using Content.Shared.Whitelist;
+
+namespace Content.Server.Store.Conditions;
+
+/// <summary>
+/// Filters out an entry based on the components or tags on an entity.
+/// </summary>
+public sealed class BuyerWhitelistCondition : ListingCondition
+{
+    /// <summary>
+    /// A whitelist of tags or components.
+    /// </summary>
+    [DataField("whitelist")]
+    public EntityWhitelist? Whitelist;
+
+    /// <summary>
+    /// A blacklist of tags or components.
+    /// </summary>
+    [DataField("blacklist")]
+    public EntityWhitelist? Blacklist;
+
+    public override bool Condition(ListingConditionArgs args)
+    {
+        var ent = args.EntityManager;
+
+        if (Whitelist != null)
+        {
+            if (!Whitelist.IsValid(args.Buyer, ent))
+                return false;
+        }
+
+        if (Blacklist != null)
+        {
+            if (Blacklist.IsValid(args.Buyer, ent))
+                return false;
+        }
+
+        return true;
+    }
+}