Initial ListCondition implementation

common/src/main/java/me/shedaniel/clothconfig2/impl/dependencies/conditions/ListCondition.java

@@ -0,0 +1,66 @@
+package me.shedaniel.clothconfig2.impl.dependencies.conditions;
+
+import net.minecraft.network.chat.Component;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+public class ListCondition<T> extends FlaggedCondition<List<T>> {
+
+    private final ListRequirement requirement;
+    private final Collection<T> values;
+
+    public ListCondition(ListRequirement requirement, T value){
+        this(requirement, Collections.singletonList(value));
+    }
+
+    public ListCondition(ListRequirement requirement, Collection<T> values){
+        this.requirement = requirement;
+        this.values = values;
+    }
+
+    @Override
+    public boolean check(List<T> values) {
+        return inverted() != this.requirement.check(values, this.values);
+    }
+
+    @Override
+    public Component getText(boolean inverted) {
+        //TODO
+        return null;
+    }
+
+    public enum ListRequirement {
+        CONTAINS_ANY,
+        NOT_CONTAINS_ANY,
+        CONTAINS_ALL,
+        NOT_CONTAINS_ALL,
+        MATCHES,
+        NOT_MATCHES;
+
+        /**
+         * Checks whether {@code collection} meets this requirement for {@code values}
+         * 
+         * <ul>
+         *     <li><em>{@link #CONTAINS_ANY}</em> - true if {@code collection} contains anything in {@code values}</li>
+         *     <li><em>{@link #NOT_CONTAINS_ANY}</em> - true if {@code collection} doesn't contain anything in {@code values}</li>
+         *     <li><em>{@link #CONTAINS_ALL}</em> - true if {@code collection} contains everything in {@code values}</li>
+         *     <li><em>{@link #NOT_CONTAINS_ALL}</em> - true if {@code collection} doesn't contain everything in {@code values}</li>
+         *     <li><em>{@link #MATCHES}</em> - true if {@code collection}'s content exactly matches {@code values}'s</li>
+         *     <li><em>{@link #NOT_MATCHES}</em> - true if {@code collection}'s content is different to {@code values}'s</li>
+         * </ul>
+         */
+        public <T> boolean check(Collection<T> collection, Collection<T> values) {
+            return switch (this) {
+                case CONTAINS_ANY -> values.stream().anyMatch(collection::contains);
+                case NOT_CONTAINS_ANY -> values.stream().noneMatch(collection::contains);
+                case CONTAINS_ALL -> collection.containsAll(values);
+                case NOT_CONTAINS_ALL -> values.stream().anyMatch(value -> !collection.contains(value));
+                case MATCHES -> values.size() == collection.size() && values.containsAll(collection);
+                case NOT_MATCHES -> values.size() != collection.size()
+                                    || values.stream().anyMatch(value -> !collection.contains(value));
+            };
+        }
+    }
+}