Add RedirectProtocolVersion API to common module (#3701)

common/src/main/java/com/viaversion/viaversion/protocol/RedirectProtocolVersion.java

@@ -0,0 +1,55 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol;
+
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.api.protocol.version.SubVersionRange;
+import com.viaversion.viaversion.api.protocol.version.VersionType;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import java.util.Comparator;
+
+/**
+ * Special protocol version that compares to another version. This can be used for e.g. April Fool versions which are depending 
+ * on vanilla game versions.
+ */
+public class RedirectProtocolVersion extends ProtocolVersion {
+
+    private final ProtocolVersion origin;
+
+    public RedirectProtocolVersion(final int version, final String name, final ProtocolVersion origin) {
+        this(version, -1, name, null, origin);
+    }
+
+    /**
+     * See {@link ProtocolVersion} for more information.
+     */
+    public RedirectProtocolVersion(final int version, final int snapshotVersion, final String name, @Nullable final SubVersionRange versionRange, final ProtocolVersion origin) {
+        super(VersionType.SPECIAL, version, snapshotVersion, name, versionRange);
+        this.origin = origin;
+    }
+
+    @Override
+    protected @Nullable Comparator<ProtocolVersion> customComparator() {
+        return (o1, o2) -> {
+            if (o1 == this) o1 = this.origin;
+            if (o2 == this) o2 = this.origin;
+            return o1.compareTo(o2);
+        };
+    }
+
+}