Implemented first tracer lib version

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/script/lua/libs/TracerLib.java

@@ -0,0 +1,86 @@
+package de.steamwar.bausystem.features.script.lua.libs;
+
+import de.steamwar.bausystem.features.tracer.TNTPoint;
+import de.steamwar.bausystem.features.tracer.Trace;
+import de.steamwar.bausystem.features.tracer.TraceManager;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.util.Vector;
+import org.luaj.vm2.LuaError;
+import org.luaj.vm2.LuaInteger;
+import org.luaj.vm2.LuaTable;
+import org.luaj.vm2.LuaValue;
+import org.luaj.vm2.lib.OneArgFunction;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+public class TracerLib implements LuaLib{
+    @Override
+    public String name() {
+        return "tracer";
+    }
+
+    private LuaTable convertTrace(Trace trace) {
+        return LuaValue.listOf(
+                trace.getHistories()
+                .stream()
+                .map((history) -> LuaValue.listOf(history.stream().map(this::convertTntPoint).toArray(LuaValue[]::new)))
+                .toArray(LuaValue[]::new)
+        );
+    }
+
+    private LuaTable convertTntPoint(TNTPoint tntPoint) {
+        Location pointPos = tntPoint.getLocation();
+        LuaTable luaPos = LuaValue.listOf(new LuaValue[] {
+                LuaValue.valueOf(pointPos.getX()),
+                LuaValue.valueOf(pointPos.getY()),
+                LuaValue.valueOf(pointPos.getZ()),
+        });
+
+        Vector pointVel = tntPoint.getVelocity();
+        LuaTable luaVel = LuaValue.listOf(new LuaValue[] {
+                LuaValue.valueOf(pointVel.getX()),
+                LuaValue.valueOf(pointVel.getY()),
+                LuaValue.valueOf(pointVel.getZ()),
+        });
+
+        return LuaValue.tableOf(new LuaValue[] {
+                LuaValue.valueOf("pos"), luaPos,
+                LuaValue.valueOf("vel"), luaVel,
+                LuaValue.valueOf("ticksSinceStart"), LuaValue.valueOf(tntPoint.getTicksSinceStart()),
+                LuaValue.valueOf("fuse"), LuaValue.valueOf(tntPoint.getFuse()),
+                LuaValue.valueOf("isExplosion"), LuaValue.valueOf(tntPoint.isExplosion()),
+                LuaValue.valueOf("isInWater"), LuaValue.valueOf(tntPoint.isInWater()),
+                LuaValue.valueOf("hasDestroyedBuild"), LuaValue.valueOf(tntPoint.isDestroyedBuildArea()),
+                LuaValue.valueOf("hasDestroyedTestblock"), LuaValue.valueOf(tntPoint.isDestroyedTestBlock())
+        });
+    }
+
+    @Override
+    public LuaTable get(Player player) {
+        LuaTable rootTable = new LuaTable();
+
+        rootTable.set("getTrace", new OneArgFunction() {
+            @Override
+            public LuaValue call(LuaValue arg) {
+                int id = arg.checkint();
+
+                Optional<Trace> traceResult = TraceManager.instance.get(id);
+                if(traceResult.isEmpty()) {
+                    throw new LuaError("No trace found with id " + id);
+                } else {
+                  return convertTrace(traceResult.get());
+                }
+            }
+        });
+
+        rootTable.set("getAllTraceIds", getter(() -> LuaValue.listOf(TraceManager.instance.getAllIds()
+                .stream()
+                .map((id) -> LuaValue.valueOf(id)).toArray(LuaValue[]::new))
+        ));
+
+        return rootTable;
+    }
+}