read_file, delete_file, and write_file

Deprecated some uses of load_app_data and store_app_data

src/main/java/carpet/script/bundled/FileModule.java

@@ -1,17 +1,24 @@
 package carpet.script.bundled;
 
-import carpet.CarpetServer;
 import net.minecraft.nbt.PositionTracker;
 import net.minecraft.nbt.Tag;
 import net.minecraft.nbt.TagReaders;
 
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Locale;
 
 public class FileModule extends Module
@@ -96,4 +103,44 @@ public class FileModule extends Module
         if (!file.exists()) file_2.renameTo(file);
         return true;
     }
+
+    public static boolean appendText(File filePath, boolean addNewLines, List<String> data)
+    {
+        try
+        {
+            OutputStream out = Files.newOutputStream(filePath.toPath(), StandardOpenOption.APPEND, StandardOpenOption.CREATE);
+            try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, StandardCharsets.UTF_8)))
+            {
+                for (String line: data)
+                {
+                    writer.append(line);
+                    if (addNewLines) writer.newLine();
+                }
+            }
+        }
+        catch (IOException e)
+        {
+            return false;
+        }
+        return true;
+    }
+
+
+    public static List<String> listFileContent(File filePath)
+    {
+        try (BufferedReader reader = Files.newBufferedReader(filePath.toPath(), StandardCharsets.UTF_8)) {
+            List<String> result = new ArrayList<>();
+            for (;;) {
+                String line = reader.readLine();
+                if (line == null)
+                    break;
+                result.add(line.replaceAll("[\n\r]+",""));
+            }
+            return result;
+        }
+        catch (IOException e)
+        {
+            return null;
+        }
+    }
 }

src/main/java/carpet/script/bundled/Module.java

@@ -5,15 +5,14 @@ import net.minecraft.nbt.Tag;
 
 import java.io.File;
 import java.nio.file.Files;
-
-import static carpet.script.bundled.FileModule.read;
-import static carpet.script.bundled.FileModule.write;
+import java.util.List;
 
 public abstract class Module
 {
     public abstract String getName();
     public abstract String getCode();
     public abstract boolean isLibrary();
+    public final static Object writeIOSync = new Object();
 
     private static String getDescriptor(Module module, String file, boolean isShared)
     {
@@ -33,20 +32,48 @@ public abstract class Module
 
     public static Tag getData(Module module, String file, boolean isShared)
     {
-        if (!isShared && (module == null || module.getName() == null)) return null;
-        File dataFile = CarpetServer.minecraft_server.getLevelStorage().resolveFile(
-                CarpetServer.minecraft_server.getLevelName(), "scripts/"+getDescriptor(module, file, isShared)+".nbt");
+        File dataFile = resolveResource(module, file, "nbt", isShared);
+        if (dataFile == null) return null;
         if (!Files.exists(dataFile.toPath()) || !(dataFile.isFile())) return null;
-        return read(dataFile);
+        synchronized (writeIOSync) { return FileModule.read(dataFile); }
     }
 
     public static boolean saveData(Module module, String file, Tag globalState, boolean isShared)
     {
-        if (!isShared && (module == null || module.getName() == null)) return false;
-        File dataFile =CarpetServer.minecraft_server.getLevelStorage().resolveFile(
-                CarpetServer.minecraft_server.getLevelName(), "scripts/"+getDescriptor(module, file, isShared)+".nbt");
+        File dataFile = resolveResource(module, file, "nbt", isShared);
+        if (dataFile == null) return false;
         if (!Files.exists(dataFile.toPath().getParent()) && !dataFile.getParentFile().mkdirs()) return false;
-        return write(globalState, dataFile);
+        synchronized (writeIOSync) { return FileModule.write(globalState, dataFile); }
+    }
+
+    public static boolean appendToTextFile(Module module, String resourceName, String type, boolean isShared, List<String> message)
+    {
+        File dataFile = resolveResource(module, resourceName, "txt", isShared);
+        if (dataFile == null) return false;
+        if (!Files.exists(dataFile.toPath().getParent()) && !dataFile.getParentFile().mkdirs()) return false;
+        synchronized (writeIOSync) { return FileModule.appendText(dataFile, type.equals("text"), message); }
+    }
+
+    public static boolean dropExistingFile(Module module, String resourceName, String ext, boolean isShared)
+    {
+        File dataFile = resolveResource(module, resourceName, ext, isShared);
+        if (dataFile == null) return false;
+        synchronized (writeIOSync) { return dataFile.delete(); }
+    }
+
+    public static List<String> listFile(Module module, String resourceName, String ext, boolean isShared)
+    {
+        File dataFile = resolveResource(module, resourceName, ext, isShared);
+        if (dataFile == null) return null;
+        if (!dataFile.exists()) return null;
+        synchronized (writeIOSync) { return FileModule.listFileContent(dataFile); }
+    }
+
+    private static File resolveResource(Module module, String resourceName, String ext, boolean isShared)
+    {
+        if (!isShared && (module == null || module.getName() == null)) return null;
+        return CarpetServer.minecraft_server.getLevelStorage().resolveFile(
+                CarpetServer.minecraft_server.getLevelName(), "scripts/"+getDescriptor(module, resourceName, isShared)+"."+ext);
     }
 
     @Override