Adding file manager class

src/main/java/de/redstoneworld/redutilities/files/FileManager.java

@@ -0,0 +1,119 @@
+package de.redstoneworld.redutilities.files;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class FileManager {
+
+    // https://mkyong.com/java/how-do-convert-byte-array-to-string-in-java/
+
+    private final File baseDir;
+    private Logger logger;
+
+    public FileManager(File baseDir) {
+        this.baseDir = baseDir;
+    }
+
+    public File createFolder(String subFolder) {
+        return createFolder(baseDir, subFolder);
+    }
+
+    public File createFolder(File dir, String newFolderName) {
+
+        File folder = new File(dir, newFolderName);
+
+        // Create folder if it doesn't exist
+        if (!folder.exists()) {
+            logger.log(Level.INFO, "Creating the folder: '" + newFolderName + "'");
+
+            folder.mkdirs();
+        }
+
+        return folder;
+    }
+
+    public File copyDefaultFile(InputStream pluginResource, String resourceFileName) {
+        return copyDefaultFile(pluginResource, baseDir, resourceFileName);
+    }
+
+    public File copyDefaultFile(InputStream pluginResource, File dir, String resourceFileName) {
+
+        File file = new File(dir, resourceFileName);
+
+        try {
+
+            // Create default file if it doesn't exist
+            if (!file.exists()) {
+                logger.log(Level.INFO, "Creating the default file: '" + resourceFileName + "'");
+
+                FileOutputStream outputStream = new FileOutputStream(file);
+                pluginResource.transferTo(outputStream);
+            }
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return file;
+    }
+
+    public String getFileContent(String fileName) {
+        return getFileContent(baseDir, fileName);
+    }
+
+    public String getFileContent(File dir, String fileName) {
+
+        File file = new File(dir, fileName);
+        return getFileContent(file);
+    }
+
+    public String getFileContent(File file) {
+
+        String content = "";
+
+        try {
+            InputStream in = new FileInputStream(file);
+            byte[] rawContent = in.readAllBytes();
+            content = new String(rawContent, StandardCharsets.UTF_8);
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return content;
+    }
+
+    public File saveNewFile(String newFileName, String content) {
+        return saveNewFile(baseDir, newFileName, content);
+    }
+
+    public File saveNewFile(File dir, String newFileName, String content) {
+
+        File newFile = new File(dir, newFileName);
+
+        try {
+            if (!newFile.exists()) {
+                logger.log(Level.INFO, "Creating the file: '" + newFileName + "'");
+
+                FileOutputStream outputStream = new FileOutputStream(newFile);
+                if (!content.isBlank()) outputStream.write(content.getBytes());
+            }
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return newFile;
+    }
+
+    public void setLogger(Logger logger) {
+        this.logger = logger;
+    }
+
+    public Logger getLogger() {
+        return logger;
+    }
+
+}