UpdateViewModel.java

package com.gero.newpass.viewmodel;


import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;

import com.gero.newpass.R;
import com.gero.newpass.database.DatabaseHelper;
import com.gero.newpass.database.DatabaseServiceLocator;
import com.gero.newpass.encryption.EncryptionHelper;
import com.gero.newpass.repository.ResourceRepository;

public class UpdateViewModel extends ViewModel {

    private final DatabaseHelper databaseHelper;
    private final MutableLiveData<String> messageLiveData = new MutableLiveData<>();
    private final MutableLiveData<Boolean> successUpdateLiveData = new MutableLiveData<>();
    private final MutableLiveData<Boolean> successDeleteLiveData = new MutableLiveData<>();
    private final ResourceRepository resourceRepository;

    public UpdateViewModel(ResourceRepository resourceRepository) {
        this.databaseHelper = DatabaseServiceLocator.getDatabaseHelper();
        this.resourceRepository = resourceRepository;
    }

    public LiveData<String> getMessageLiveData() {
        return messageLiveData;
    }
    public LiveData<Boolean> getSuccessUpdateLiveData() {
        return successUpdateLiveData;
    }

    public void updateEntry(String entry, String name, String email, String password) {

        String encryptedPassword = EncryptionHelper.encrypt(password);

        int nameMaxLen = 30;
        int emailMaxLen = 30;
        int passwordMaxLen = 30;

        if (
                !name.isEmpty() && name.length() <= nameMaxLen &&
                        email.length() <= emailMaxLen &&
                        password.length() >= 4 && password.length() <= passwordMaxLen
        ) {
            databaseHelper.updateData(entry, name, email, encryptedPassword);
            messageLiveData.setValue(resourceRepository.getString(R.string.dbhelper_updated_successfully));
            successUpdateLiveData.setValue(true);

        } else {
            successUpdateLiveData.setValue(false);

            if (name.isEmpty() || name.length() > nameMaxLen) {
                messageLiveData.setValue(resourceRepository.getString(R.string.name_should_be_1_to)+ nameMaxLen + resourceRepository.getString(R.string.characters_long));

            } else if (email.length() > emailMaxLen) {
                messageLiveData.setValue(resourceRepository.getString(R.string.email_should_be_0_to) + emailMaxLen + resourceRepository.getString(R.string.characters_long));

            } else {
                messageLiveData.setValue(resourceRepository.getString(R.string.password_should_be_4_to) + passwordMaxLen + resourceRepository.getString(R.string.characters_long));
            }
        }
    }

    public void deleteEntry(String entry) {
        databaseHelper.deleteOneRow(entry);
        messageLiveData.setValue(resourceRepository.getString(R.string.dbhelper_successfully_deleted));
        successDeleteLiveData.setValue(true);
    }
}