Filter by foil status (#8358)

forge-core/src/main/java/forge/item/PaperCardPredicates.java

@@ -50,6 +50,13 @@ public abstract class PaperCardPredicates {
         return new PredicateNames(what);
     }
 
+    /**
+     * Filters on a card foil status
+     */
+    public static Predicate<PaperCard> isFoil(final boolean isFoil) {
+        return new PredicateFoil(isFoil);
+    }
+
     private static final class PredicatePrintedWithRarity implements Predicate<PaperCard> {
         private final CardRarity matchingRarity;
 
@@ -93,6 +100,17 @@ public abstract class PaperCardPredicates {
         }
     }
 
+    private static final class PredicateFoil implements Predicate<PaperCard> {
+        private final boolean operand;
+
+        @Override
+        public boolean test(final PaperCard card) { return card.isFoil() == operand; }
+
+        private PredicateFoil(final boolean isFoil) {
+            this.operand = isFoil;
+        }
+    }
+
     private static final class PredicateRarity implements Predicate<PaperCard> {
         private final CardRarity operand;
 

forge-gui/src/main/java/forge/itemmanager/AdvancedSearchParser.java

@@ -408,6 +408,20 @@ public abstract class AdvancedSearchParser {
                         break;
                 }
                 break;
+
+            case "is":
+                if (opUsed.equals(":")) {
+                    switch(valueStr) {
+                        case "foil":
+                            predicate = PaperCardPredicates.isFoil(true);
+                            break;
+
+                        case "nonfoil":
+                            predicate = PaperCardPredicates.isFoil(false);
+                            break;
+                    }
+                }
+                break;
         }
 
         if (predicate == null) {