Hack23/cia

/*
 * Copyright 2010-2021 James Pether Sörling
 *
 * 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.
 *
 *    $Id$
 *  $HeadURL$
*/
package com.hack23.cia.service.impl.action.common;

import java.util.Set;
import java.util.stream.Collectors;

import javax.validation.ConstraintViolation;
import javax.validation.Validator;

import org.springframework.beans.factory.annotation.Autowired;

import com.hack23.cia.model.internal.application.user.impl.UserAccount;
import com.hack23.cia.service.api.action.application.CreateApplicationEventRequest;
import com.hack23.cia.service.api.action.application.CreateApplicationEventResponse;
import com.hack23.cia.service.api.action.common.AbstractResponse;
import com.hack23.cia.service.api.action.common.ServiceRequest;
import com.hack23.cia.service.api.action.common.ServiceResponse;

/**
 * The Class AbstractBusinessServiceImpl.
 *
 * @param <T>
 *            the generic type
 * @param <V>
 *            the value type
 */
public abstract class AbstractBusinessServiceImpl<T extends ServiceRequest, V extends ServiceResponse>
        extends AbstractCommonBusinessServiceImpl<T, V> {

    /** The create application event service. */
    @Autowired
    protected BusinessService<CreateApplicationEventRequest, CreateApplicationEventResponse> createApplicationEventService;

    @Autowired
    protected Validator validator;

    /**
     * Instantiates a new abstract business service impl.
     *
     * @param clazz
     *            the clazz
     */
    public AbstractBusinessServiceImpl(final Class<T> clazz) {
        super(clazz);
    }

    /**
     * Gets the create application event service.
     *
     * @return the create application event service
     */
    protected final BusinessService<CreateApplicationEventRequest, CreateApplicationEventResponse> getCreateApplicationEventService() {
        return createApplicationEventService;
    }

    /**
     * Creates the error response.
     *
     * @return the v
     */
    protected abstract V createErrorResponse();


    /**
     * Input validation.
     *
     * @param serviceRequest
     *            the service request
     * @return the v
     */
    protected final V inputValidation(final T serviceRequest) {
        final Set<ConstraintViolation<T>> validateRequest = validateRequest(serviceRequest);
        if (!validateRequest.isEmpty()) {
            final CreateApplicationEventRequest eventRequest = createApplicationEventForService(serviceRequest);
            final V response = createErrorResponse();
            handleInputViolations(eventRequest, validateRequest, response);
            createApplicationEventService.processService(eventRequest);
            return response;
        } else {
            return null;
        }
    }

    /**
     * Creates the base application event request.
     *
     * @return the creates the application event request
     */
    protected final CreateApplicationEventRequest createBaseApplicationEventRequest() {
        final CreateApplicationEventRequest eventRequest = new CreateApplicationEventRequest();
        final UserAccount userAccount = getUserAccountFromSecurityContext();

        if (userAccount != null) {
            eventRequest.setUserId(userAccount.getUserId());
        }
        return eventRequest;
    }


    /**
     * Creates the application event for service.
     *
     * @param serviceRequest
     *            the service request
     * @return the creates the application event request
     */
    protected abstract CreateApplicationEventRequest createApplicationEventForService(final T serviceRequest);

    /**
     * Validate request.
     *
     * @param request
     *            the request
     * @return the sets the
     */
    private Set<ConstraintViolation<T>> validateRequest(final T request) {
        return validator.validate( request );
    }

    /**
     * Gets the human message.
     *
     * @param requestConstraintViolations
     *            the request constraint violations
     * @return the human message
     */
    private String getHumanMessage(final Set<ConstraintViolation<T>> requestConstraintViolations) {
        return requestConstraintViolations.stream()
                .sorted((p1, p2) -> p1.getPropertyPath().toString().compareTo(p2.getPropertyPath().toString()))
                .map(p -> p.getPropertyPath().toString() + " " + p.getMessage()).collect(Collectors.joining(", "));
    }

    /**
     * Handle input violations.
     *
     * @param eventRequest
     *            the event request
     * @param requestConstraintViolations
     *            the request constraint violations
     * @param response
     *            the response
     * @return the v
     */
    private void handleInputViolations(final CreateApplicationEventRequest eventRequest,
            final Set<ConstraintViolation<T>> requestConstraintViolations,final V response) {
        final String errorMessage = getHumanMessage(requestConstraintViolations);
        ((AbstractResponse) response).setErrorMessage(errorMessage);
        eventRequest.setErrorMessage(errorMessage);
    }


}