Rudimentary saving and loading

Signed-off-by: AKP <tom@tdpain.net>

openjfx-todo/pom.xml

@@ -20,6 +20,11 @@
             <artifactId>javafx-fxml</artifactId>
             <version>19</version>
         </dependency>
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>20220924</version>
+        </dependency>
     </dependencies>
     <build>
         <plugins>
@@ -41,7 +46,7 @@
                         <!-- Usage: mvn clean javafx:run -->
                         <id>default-cli</id>
                         <configuration>
-                            <mainClass>net.akpain.todo.App</mainClass>
+                            <mainClass>qakpain.todo.App</mainClass>
                         </configuration>
                     </execution>
                 </executions>

openjfx-todo/src/main/java/module-info.java

@@ -1,6 +1,7 @@
 module net.akpain.todo {
     requires javafx.controls;
     requires javafx.fxml;
+    requires org.json;
 
     opens net.akpain.todo to javafx.fxml;
     exports net.akpain.todo;

openjfx-todo/src/main/java/net/akpain/todo/Controller.java

@@ -10,12 +10,16 @@ import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.VBox;
 
+import java.io.IOException;
+
 public class Controller {
 
     public VBox todoDisplayBox;
     public TextField todoTextField;
+    private StorageController storage;
 
     public Controller() {
+        storage = new StorageController();
         todoDisplayBox = new VBox();
     }
 
@@ -36,6 +40,18 @@ public class Controller {
 
         todoDisplayBox.getChildren().add(p);
         todoTextField.clear();
+
+        storage.addTodo(new TodoObject(input));
+    }
+
+    @FXML
+    private void saveAll() {
+        try {
+            storage.save();
+        } catch (IOException e) {
+            // TODO: 06/02/2023 handle this with an error dialog or similar
+            throw new RuntimeException(e);
+        }
     }
 
     private void checkBoxChecked(MouseEvent event) {

openjfx-todo/src/main/java/net/akpain/todo/LoadError.java

@@ -0,0 +1,11 @@
+package net.akpain.todo;
+
+public class LoadError extends Exception {
+    public LoadError(String message) {
+        super(message);
+    }
+
+    public LoadError() {
+        super();
+    }
+}

openjfx-todo/src/main/java/net/akpain/todo/StorageController.java

@@ -1,5 +1,10 @@
 package net.akpain.todo;
 
+import org.json.JSONArray;
+import org.json.JSONTokener;
+import org.json.JSONWriter;
+
+import java.io.*;
 import java.util.LinkedList;
 
 public class StorageController {
@@ -10,16 +15,62 @@ public class StorageController {
         todos = new LinkedList<>();
     }
 
-    public void load() {
-
+    private File getDefaultDirectory() throws IOException {
+        File dir = new File(System.getProperty("user.home"));
+        dir = new File(dir, ".local/share/openjfx-todo");
+        dir.mkdirs();
+        return dir;
     }
 
-    public void load(String filename) {
-
+    private File getDefaultFilename() throws IOException {
+        return new File(getDefaultDirectory(), "todos.json");
     }
 
-    private void save() {
+    public void load() throws LoadError, IOException {
+        load(getDefaultFilename().getAbsolutePath());
+    }
 
+    public void load(String filename) throws LoadError, IOException {
+        FileInputStream file;
+        try {
+            file = new FileInputStream(filename);
+        } catch (FileNotFoundException __) {
+            return;
+        }
+
+        JSONTokener jtok = new JSONTokener(file);
+        JSONArray jarr = new JSONArray(jtok);
+
+        this.todos = new LinkedList<>();
+
+        for (int i = 0; i < jarr.length(); i += 1) {
+            this.todos.add(TodoObject.fromJSONObject(jarr.getJSONObject(i)));
+        }
+
+        file.close();
+    }
+
+    public void save() throws IOException {
+        save(getDefaultFilename().getAbsolutePath());
+    }
+
+    public void save(String filename) throws IOException {
+        FileWriter fwr = new FileWriter(filename);
+        JSONWriter jwr = new JSONWriter(fwr);
+
+        jwr.array();
+        for (TodoObject todo : this.todos) {
+            jwr.value(todo.toJSONObject());
+        }
+        jwr.endArray();
+
+        fwr.close();
+
+        System.err.printf("Saved to %s\n", filename);
+    }
+
+    public void addTodo(TodoObject todo) {
+        this.todos.add(todo);
     }
 
 }

openjfx-todo/src/main/java/net/akpain/todo/TodoObject.java

@@ -1,5 +1,7 @@
 package net.akpain.todo;
 
+import org.json.JSONObject;
+
 public class TodoObject {
     private String text;
     private boolean completed;
@@ -8,4 +10,27 @@ public class TodoObject {
         this.completed = false;
         this.text = text;
     }
+
+    public TodoObject(String text, boolean checked) {
+        this.completed = checked;
+        this.text = text;
+    }
+
+    public static TodoObject fromJSONObject(JSONObject jobj) throws LoadError {
+        boolean cmp = jobj.getBoolean("completed");
+        String txt = jobj.getString("text");
+
+        if ("".equals(txt)) {
+            throw new LoadError("missing description");
+        }
+
+        return new TodoObject(txt, cmp);
+    }
+
+    public JSONObject toJSONObject() {
+        JSONObject jobj = new JSONObject();
+        jobj.put("completed", this.completed);
+        jobj.put("text", this.text);
+        return jobj;
+    }
 }

openjfx-todo/src/main/resources/net/akpain/todo/primary.fxml

@@ -11,6 +11,7 @@
 
     <TextField fx:id="todoTextField" GridPane.columnIndex="1" GridPane.rowIndex="1" GridPane.columnSpan="7" onKeyPressed="#onTextFieldKeyPress" />
     <Button GridPane.columnIndex="8" GridPane.rowIndex="1" text="Add todo" onMouseClicked="#addTodo"/>
+    <Button GridPane.columnIndex="9" GridPane.rowIndex="1" text="Save" onMouseClicked="#saveAll"/>
 
     <VBox fx:id="todoDisplayBox" GridPane.columnIndex="1" GridPane.rowIndex="3" spacing="4" />
 </GridPane>