From a9393f878ffe7f4ff44e9b237311322109f422a4 Mon Sep 17 00:00:00 2001
From: D4rkr34lm <darth.m.frohn@gmail.com>
Date: Thu, 8 Aug 2024 15:01:57 +0200
Subject: [PATCH] Extracted Trace Deserialisation/Serialisation process into
 Repo

---
 .../features/tracer/TraceRepository.java      | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceRepository.java

diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceRepository.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceRepository.java
new file mode 100644
index 00000000..de33bfef
--- /dev/null
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/tracer/TraceRepository.java
@@ -0,0 +1,96 @@
+package de.steamwar.bausystem.features.tracer;
+
+import de.steamwar.bausystem.region.Region;
+import lombok.Cleanup;
+import lombok.SneakyThrows;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.util.Vector;
+
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.ObjectInputStream;
+import java.util.*;
+import java.util.zip.GZIPInputStream;
+
+public class TraceRepository {
+
+    /**
+     * Increment this when changing serialisation format
+     */
+    public static final int SERIALISATION_VERSION = 1;
+
+    @SneakyThrows
+    protected static int getVersion(File metadataFile) {
+        @Cleanup
+        ObjectInputStream reader = new ObjectInputStream(new FileInputStream(metadataFile));
+        reader.readUTF();
+        reader.readUTF();
+        reader.readObject();
+        try {
+            int version = reader.readInt();
+            return version;
+        } catch (EOFException e) {
+            return 0;
+        }
+    }
+
+    @SneakyThrows
+    protected static Trace readTrace(File metadataFile) {
+        @Cleanup
+        ObjectInputStream reader = new ObjectInputStream(new FileInputStream(metadataFile));
+        UUID uuid = UUID.fromString(reader.readUTF());
+        Region region = Region.getREGION_MAP().get(reader.readUTF());
+        Date date = (Date) reader.readObject();
+        File recordsFile = new File(uuid + ".records");
+        int recordsCount = reader.readInt();
+
+        return new Trace(uuid, region, date, metadataFile, recordsFile, recordsCount);
+    }
+
+    @SneakyThrows
+    protected static TNTPoint readTraceRecord(ObjectInputStream objectInput) {
+
+        int tntId = objectInput.readInt();
+        boolean explosion = objectInput.readBoolean();
+        boolean inWater = objectInput.readBoolean();
+        boolean afterFirstExplosion = objectInput.readBoolean();
+        boolean destroyedBuildArea = objectInput.readBoolean();
+        boolean destroyedTestBlock = objectInput.readBoolean();
+        long ticksSinceStart = objectInput.readLong();
+        int fuse = objectInput.readInt();
+        double locX = objectInput.readDouble();
+        double locY = objectInput.readDouble();
+        double locZ = objectInput.readDouble();
+        Location location = new Location(Bukkit.getWorlds().get(0), locX, locY, locZ);
+        double velX = objectInput.readDouble();
+        double velY = objectInput.readDouble();
+        double velZ = objectInput.readDouble();
+        Vector velocity = new Vector(velX, velY, velZ);
+
+        return new TNTPoint(tntId, explosion, inWater, afterFirstExplosion, destroyedBuildArea, destroyedTestBlock, ticksSinceStart, fuse, location, velocity);
+    }
+
+    @SneakyThrows
+    protected static List<TNTPoint> readTraceRecords(Trace trace) {
+        File recordsFile = trace.getRecordsSaveFile();
+        @Cleanup
+        ObjectInputStream inputStream = new ObjectInputStream(new GZIPInputStream(new FileInputStream(recordsFile)));
+
+        List<TNTPoint> records = new ArrayList<>();
+        for (int i = 0; i < trace.getRecordsCount(); i++) {
+            records.add(readTraceRecord(inputStream));
+        }
+
+        Map<Integer, List<TNTPoint>> histories = new HashMap<>();
+        for (TNTPoint record : records) {
+            int tntId = record.getTntId();
+            List<TNTPoint> history = histories.computeIfAbsent(tntId, id -> new ArrayList<>());
+            history.add(record);
+            record.setHistory(history);
+        }
+
+        return records;
+    }
+}