Store custom multiblocks in a JSON file

src/main/java/net/slqmy/template_paper_plugin/custom_multiblock/AbstractCustomMultiblock.java

@@ -17,6 +17,14 @@ public abstract class AbstractCustomMultiblock implements Listener {
 
   private final List<List<BlockLocation>> multiblocks = new ArrayList<>();
 
+  public List<List<BlockLocation>> getMultiblocks() {
+    return multiblocks;
+  }
+
+  public void addMultiblocks(List<List<BlockLocation>> addedMultiblocks) {
+    multiblocks.addAll(addedMultiblocks);
+  }
+
   public AbstractCustomMultiblock(TemplatePaperPlugin plugin, CustomMultiblockManager customMultiblockManager, CustomMultiblock multiblockId) {
     this.plugin = plugin;
 

src/main/java/net/slqmy/template_paper_plugin/custom_multiblock/CustomMultiblockManager.java

@@ -1,10 +1,21 @@
 package net.slqmy.template_paper_plugin.custom_multiblock;
 
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 
 import org.bukkit.Location;
 
+import com.google.gson.Gson;
+
 import net.slqmy.template_paper_plugin.custom_multiblock.AbstractCustomMultiblock;
 import net.slqmy.template_paper_plugin.custom_multiblock.CustomMultiblock;
 import net.slqmy.template_paper_plugin.TemplatePaperPlugin;
@@ -13,10 +24,20 @@ public class CustomMultiblockManager {
 
   private final TemplatePaperPlugin plugin;
 
+  private final String multiblocksFileExtension = ".json";
+  private final String multiblocksResourceFilePath = "multiblocks" + multiblocksFileExtension;
+  private final String multiblocksFilePath;
+  private final File multiblocksFile;
+
   private final Map<CustomMultiblock, AbstractCustomMultiblock> customMultiblockMap = new HashMap<>();
 
   public CustomMultiblockManager(TemplatePaperPlugin plugin) {
     this.plugin = plugin;
+
+    multiblocksFilePath = plugin.getDataFolder() + File.separator + multiblocksResourceFilePath;
+    multiblocksFile = new File(multiblocksFilePath);
+
+    load();
   }
 
   public void addCustomMultiblock(CustomMultiblock multiblockId, AbstractCustomMultiblock abstractCustomMultiblock) {
@@ -30,4 +51,79 @@ public AbstractCustomMultiblock getAbstractCustomMultiblock(CustomMultiblock mul
   public void placeCustomMultiblock(CustomMultiblock multiblockId, Location location) {
     customMultiblockMap.get(multiblockId).getCustomMultiblock(location);
   }
+
+  public List<StoredCustomMultiblock> getAllMultiblocks() {
+    List<StoredCustomMultiblock> allMultiblocks = new ArrayList<>();
+
+    for (Entry<CustomMultiblock, AbstractCustomMultiblock> multiblockInfo : customMultiblockMap.entrySet()) {
+      allMultiblocks.add(new StoredCustomMultiblock(multiblockInfo));
+    }
+
+    return allMultiblocks;
+  }
+
+  private void load() {
+    if (!multiblocksFile.exists()) {
+      return;
+    }
+
+    StoredCustomMultiblocks multiblocks;
+
+    Gson gson = new Gson();
+    try {
+      Reader reader = new FileReader(multiblocksFile);
+
+      multiblocks = gson.fromJson(reader, StoredCustomMultiblocks.class);
+
+      reader.close();
+    } catch (IOException exception) {
+      exception.printStackTrace();
+      return;
+    }
+
+    loadStoredCustomMultiblocks(multiblocks);
+  }
+
+  public void save() {
+    StoredCustomMultiblocks dataToSave = getStoredCustomMultiblocks();
+
+    if (dataToSave.getStoredCustomMultiblocks().size() == 0) {
+      return;
+    }
+
+    if (multiblocksFile.exists()) {
+      plugin.saveResource(multiblocksResourceFilePath, false);
+    }
+
+    Gson gson = new Gson();
+
+    try {
+      Writer writer = new FileWriter(multiblocksFile);
+
+      String json = gson.toJson(dataToSave);
+
+      writer.write(json);
+
+      writer.flush();
+      writer.close();
+    } catch (IOException exception) {
+      exception.printStackTrace();
+    }
+  }
+
+  public void loadStoredCustomMultiblocks(StoredCustomMultiblocks multiblocks) {
+    for (StoredCustomMultiblock multiblock : multiblocks.getStoredCustomMultiblocks()) {
+      customMultiblockMap.get(multiblock.getMultiblockId()).addMultiblocks(multiblock.getBlockLocations());
+    }
+  }
+
+  public StoredCustomMultiblocks getStoredCustomMultiblocks() {
+    StoredCustomMultiblocks output = new StoredCustomMultiblocks();
+
+    for (Entry<CustomMultiblock, AbstractCustomMultiblock> multiblockInfo : customMultiblockMap.entrySet()) {
+      output.addCustomMultiblock(new StoredCustomMultiblock(multiblockInfo));
+    }
+
+    return output;
+  }
 }

src/main/java/net/slqmy/template_paper_plugin/custom_multiblock/StoredCustomMultiblock.java

@@ -0,0 +1,28 @@
+package net.slqmy.template_paper_plugin.custom_multiblock;
+
+import java.util.List;
+import java.util.Map.Entry;
+
+import net.slqmy.template_paper_plugin.util.types.BlockLocation;
+
+public class StoredCustomMultiblock {
+  private final List<List<BlockLocation>> blockLocations;
+  private final CustomMultiblock multiblockId;
+
+  public List<List<BlockLocation>> getBlockLocations() {
+    return blockLocations;
+  }
+
+  public CustomMultiblock getMultiblockId() {
+    return multiblockId;
+  }
+
+  public StoredCustomMultiblock(List<List<BlockLocation>> blockLocations, CustomMultiblock multiblockId) {
+    this.blockLocations = blockLocations;
+    this.multiblockId = multiblockId;
+  }
+
+  public StoredCustomMultiblock(Entry<CustomMultiblock, AbstractCustomMultiblock> multiblockInfo) {  
+    this(multiblockInfo.getValue().getMultiblocks(), multiblockInfo.getKey());
+  } 
+}

src/main/java/net/slqmy/template_paper_plugin/custom_multiblock/StoredCustomMultiblocks.java

@@ -0,0 +1,15 @@
+package net.slqmy.template_paper_plugin.custom_multiblock;
+
+import java.util.List;
+
+public class StoredCustomMultiblocks {
+  private List<StoredCustomMultiblock> storedCustomMultiblocks;
+
+  public List<StoredCustomMultiblock> getStoredCustomMultiblocks() {
+    return storedCustomMultiblocks;
+  }
+
+  public void addCustomMultiblock(StoredCustomMultiblock addedCustomMultiblocks) {
+    storedCustomMultiblocks.add(addedCustomMultiblocks);
+  }
+}

src/main/resources/multiblocks.json

@@ -0,0 +1 @@
+[]