Add removing of coordinates and add optional migration of coordinates database table to include autoincrement id property

ic_plugin_core/src/main/java/nl/interestingcorner/core/db/DatabaseManager.java

@@ -28,7 +28,7 @@ public enum DatabaseManager {
         if (this.initialized) {
             return true;
         }
-        
+
         this.app = app;
 
         if (!setupDatabase()) {
@@ -58,6 +58,12 @@ public enum DatabaseManager {
         return true;
     }
 
+    /**
+     * Registers a listener that will be called when the database is
+     * initialized. This can be used to initialize the tables for the database.
+     *
+     * @param listener the listener to register
+     */
     public void registerDatabaseInitializeListener(DatabaseInitializeListener listener) {
         this.databaseInitializeListeners.add(listener);
         this.app.getLogger().log(Level.INFO, "Registered database initialize listener: {0}", listener.getClass().getName());
@@ -93,7 +99,7 @@ public enum DatabaseManager {
             this.connection = DriverManager.getConnection(url);
         } catch (SQLException e) {
             this.app.getLogger().log(Level.SEVERE, "Could not connect to database file {0}: {1}",
-                    new Object[] { dbFile, e.getMessage() });
+                    new Object[]{dbFile, e.getMessage()});
         }
 
         this.app.getLogger().log(Level.INFO, "Connected to SQLite database: {0}", dbFile.getName());
@@ -102,6 +108,37 @@ public enum DatabaseManager {
         return true;
     }
 
+    /**
+     * Creates a backup of the current database file in the plugin data folder.
+     * The backup file will be named database_backup_TIMESTAMP.db
+     *
+     * @return the File object of the backup, or null if failed
+     */
+    public File createBackupDatabase() {
+        if (this.app == null) {
+            return null;
+        }
+        File dbFile = new File(app.getDataFolder(), "database.db");
+        if (!dbFile.exists()) {
+            return null;
+        }
+        String backupName = "database_backup_" + System.currentTimeMillis() + ".db";
+        File backupFile = new File(app.getDataFolder(), backupName);
+        try (
+                java.io.FileInputStream in = new java.io.FileInputStream(dbFile); java.io.FileOutputStream out = new java.io.FileOutputStream(backupFile)) {
+            byte[] buffer = new byte[8192];
+            int bytesRead;
+            while ((bytesRead = in.read(buffer)) > 0) {
+                out.write(buffer, 0, bytesRead);
+            }
+            this.app.getLogger().log(Level.INFO, "Database backup created: {0}", backupFile.getName());
+            return backupFile;
+        } catch (Exception e) {
+            this.app.getLogger().log(Level.SEVERE, "Failed to create database backup: {0}", e.getMessage());
+            return null;
+        }
+    }
+
     /**
      * initializes the tables for the database.
      */