it.f2informatica.core.validator.UserModelValidator.java Source code

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Here is the source code for it.f2informatica.core.validator.UserModelValidator.java

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/*
 * =============================================================================
 *
 *   Copyright (c) 2014, Fernando Aspiazu
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 * =============================================================================
 */
package it.f2informatica.core.validator;

import com.google.common.base.Optional;
import it.f2informatica.core.model.UserModel;
import it.f2informatica.core.services.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

@Component
public class UserModelValidator extends AbstractValidator {
    private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
            + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,4})$";

    private static final String SAVE_EVENT = "save";
    private static final String UPDATE_EVENT = "update";

    @Autowired
    private RoleModelValidator roleModelValidator;

    @Autowired
    private UserService userService;

    @Override
    public boolean supports(Class<?> clazz) {
        return UserModel.class.equals(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {
        UserModel userModel = (UserModel) target;
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "username", FIELD_MANDATORY);
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "firstName", FIELD_MANDATORY);
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "lastName", FIELD_MANDATORY);
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "email", FIELD_MANDATORY);
        if (isSaveEvent(userModel)) {
            ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", FIELD_MANDATORY);
        }
        invokeValidator(roleModelValidator, userModel.getRole(), "role", errors);
        doFurtherValidation(userModel, errors);
    }

    private void doFurtherValidation(UserModel userModel, Errors errors) {
        if (errors.hasErrors()) {
            return;
        }
        if (isEmailInvalid(userModel.getEmail())) {
            errors.rejectValue("email", "err.email");
        }

        final String username = userModel.getUsername();
        Optional<UserModel> user = userService.findByUsername(username);
        if (user.isPresent()) {
            if (isSaveEvent(userModel)) {
                errors.rejectValue("username", "err.username.exists");
            } else if (isUpdateEvent(userModel) && !username.equals(user.get().getUsername())) {
                errors.rejectValue("username", "err.username.exists");
            }
        }
    }

    private boolean isEmailInvalid(String email) {
        Pattern pattern = Pattern.compile(EMAIL_PATTERN);
        Matcher matcher = pattern.matcher(email);
        return !matcher.matches();
    }

    private boolean isSaveEvent(UserModel userModel) {
        return SAVE_EVENT.equals(userModel.getSubmitEvent());
    }

    private boolean isUpdateEvent(UserModel userModel) {
        return UPDATE_EVENT.equals(userModel.getSubmitEvent());
    }

}