JavaFX Photo Management Application: Add and Delete Tags for Photos

package photo.project.controller;

import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.event.ActionEvent; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.Alert; import javafx.scene.control.Label; import javafx.scene.control.ListView; import javafx.scene.control.TextField; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import photo.project.Photos; import photo.project.Config.projectConfig; import photo.project.model.Album; import photo.project.model.Tag; import photo.project.model.User; import photo.project.util.AlertUtil; import photo.project.util.ObjectToFileUtil; import photo.project.util.WindowUtil;

import java.io.File; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.List; import java.util.ResourceBundle;

/**

The DisplayController class is responsible for controlling the display screen of the application,
which displays the selected photo's details and allows the user to add or delete tags. */ public class DisplayController implements Initializable {

@FXML private Label captionTxt; // The label displaying the selected photo's caption.

@FXML private ImageView imageView; // The image view displaying the selected photo.

@FXML private ListView tagList; // The list view displaying the tags associated with the selected photo.

@FXML private TextField tagTxt; // The text field where the user can enter a new tag.

@FXML private Label timeTxt; // The label displaying the selected photo's time.

@FXML private Label userTxt; // The label displaying the name of the logged in user.

ObservableList observableList; // The observable list used to populate the tag list.

Tag selectedTag; // The tag that is currently selected in the tag list.

/**
- This method is called when the user clicks on the 'Add Tag' button. It reads the tag entered by the user
- and adds it to the selected photo's tag list. If no photo is selected, it adds the tag to the first photo that
- matches the selected tag's caption. If the tag already exists for the selected photo, an error message is displayed.
- @param event The event triggered by the user clicking on the 'Add Tag' button. */ @FXML void addTag(ActionEvent event) {
  
  // Check if the tag entered by the user is valid. if (tagTxt.getText().equals("")) { AlertUtil.informationDialog(Alert.AlertType.ERROR, "please input valid !"); return; } String[] tagStrngs = tagTxt.getText().split("="); if (tagStrngs.length < 2) { AlertUtil.informationDialog(Alert.AlertType.ERROR, "please input valid !"); return; }
  
  // Create a new tag object from the tag entered by the user. Tag tag = new Tag(tagStrngs[0].trim(), tagStrngs[1].trim());
  
  // If no album is selected, add the tag to the selected photo in the user's collection. if(projectConfig.chooseAlbum==null){ List userList = ObjectToFileUtil.loadContent(); User user = null; for (int i = 0; i < userList.size(); i++) { User newUser = (User) userList.get(i); if (newUser.getName().equals(projectConfig.loginUser.getName())) { user = userList.get(i); } }
```
 // Find the selected photo in the user's collection.
 boolean isExist =false;
 for (int i = 0; i < user.getAlbumList().size(); i++) {
     for (int i1 = 0; i1 < user.getAlbumList().get(i).getAllPhotos().size(); i1++) {
         if(user.getAlbumList().get(i).getAllPhotos().get(i1).getCaption().equals(projectConfig.choosePhotoButton.getPhoto().getCaption())){
             if(isExist==false){

                 // Add the new tag to the selected photo's tag list.
                 user.getAlbumList().get(i).getAllPhotos().get(i1).getTagList().add(tag);
                 user.getAlbumList().get(i).getAllPhotos().get(i1).updateTime();
                 projectConfig.choosePhotoButton.setPhoto(  user.getAlbumList().get(i).getAllPhotos().get(i1));

                 isExist=true;
             }
         }

     }
 }
 // Save the modified user data to file.
 projectConfig.loginUser = user;
 ObjectToFileUtil.saveContent(userList);
 AlertUtil.informationDialog(Alert.AlertType.INFORMATION, "add tag success!");
 tagList.setItems(FXCollections.observableList(projectConfig.choosePhotoButton.getPhoto().getTagList()));
 tagList.refresh();
 return;
```
  }
  
  // If an album is selected, add the tag to the selected photo in the selected album. List userList = ObjectToFileUtil.loadContent(); User user = null; for (int i = 0; i < userList.size(); i++) { User newUser = (User) userList.get(i); if (newUser.getName().equals(projectConfig.loginUser.getName())) { user = userList.get(i); } }
  
  // Find the selected photo in the selected album. Album album = null; for (int i = 0; i < user.getAlbumList().size(); i++) { if (user.getAlbumList().get(i).getAlbumName().equals(projectConfig.chooseAlbum.getAlbumName())) { album = user.getAlbumList().get(i); for (int i1 = 0; i1 < album.getAllPhotos().size(); i1++) { if (album.getAllPhotos().get(i1).getCaption().equals(projectConfig.choosePhotoButton.getPhoto().getCaption())) { boolean isExist =false; for (int i2 = 0; i2 < album.getAllPhotos().get(i1).getTagList().size(); i2++) { if(album.getAllPhotos().get(i1).getTagList().get(i2).getName().equals(tag.getName())&& album.getAllPhotos().get(i1).getTagList().get(i2).getValue().equals(tag.getValue()) ){ isExist=true; } } if(isExist==true){ AlertUtil.informationDialog(Alert.AlertType.ERROR,"tag is exist!"); return; }else{ album.getAllPhotos().get(i1).getTagList().add(tag); album.getAllPhotos().get(i1).updateTime(); }
```
         }

     }
 }
```
  }
  
  // Save the modified user data to file. projectConfig.loginUser = user; projectConfig.chooseAlbum = ObjectToFileUtil.findAlbum(userList,projectConfig.loginUser,projectConfig.chooseAlbum); projectConfig.choosePhotoButton.setPhoto(ObjectToFileUtil.findPhoto(userList,projectConfig.loginUser,projectConfig.chooseAlbum,projectConfig.choosePhotoButton.getPhoto())); ObjectToFileUtil.saveContent(userList); AlertUtil.informationDialog