Add PistonLine algorithm back

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/panzern/algorithms/PistonLine.java

@@ -0,0 +1,58 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2021  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.panzern.algorithms;
+
+import de.steamwar.bausystem.features.panzern.PanzernAlgorithm;
+import de.steamwar.bausystem.features.panzern.PanzernResult;
+import de.steamwar.bausystem.linkage.LinkageType;
+import de.steamwar.bausystem.linkage.Linked;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.block.data.type.Piston;
+
+import java.util.Map;
+import java.util.Set;
+
+@Linked(LinkageType.PANZERN)
+public class PistonLine implements PanzernAlgorithm {
+
+    @Override
+    public PanzernResult check(Block source, Map<BlockFace, Block> adjacent, Set<Material> adjacentMaterials) {
+        for (BlockFace blockFace : BLOCK_FACES) {
+            for (int i = 1; i < 12; i++) {
+                Block relativeBlock = source.getRelative(blockFace.getModX() * i, blockFace.getModY() * i, blockFace.getModZ() * i);
+                if (relativeBlock.getType().isAir()) {
+                    break;
+                }
+                BlockData blockData = relativeBlock.getBlockData();
+                if (!(blockData instanceof Piston)) {
+                    continue;
+                }
+                Piston piston = (Piston) blockData;
+                if (piston.getFacing() == blockFace.getOppositeFace()) {
+                    return PanzernResult.EMPTY;
+                }
+            }
+        }
+        return PanzernResult.DEFAULT;
+    }
+}