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package org.glassfish.jersey.examples.beanvalidation.webapp.constraint;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.List;

import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;

import javax.validation.Constraint;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.Payload;

import org.glassfish.jersey.examples.beanvalidation.webapp.domain.ContactCard;

/**
 * Checks whether a return entity (entities) has a not-empty {@code searchType} field which contains {@code q} search phrase.
 * (Double check for entities returned from {@link org.glassfish.jersey.examples.beanvalidation.webapp.service.StorageService}.)
 *
 * @author Michal Gajdos
 */
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {NotEmptySearchField.Validator.class, NotEmptySearchField.ListValidator.class})
public @interface NotEmptySearchField {

    String message() default "{org.glassfish.jersey.examples.beanvalidation.webapp.constraint.NotEmptySearchField.message}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    public class Validator implements ConstraintValidator<NotEmptySearchField, ContactCard> {

        private UriInfo uriInfo;

        public Validator(@Context final UriInfo uriInfo) {
            this.uriInfo = uriInfo;
        }

        @Override
        public void initialize(final NotEmptySearchField hasId) {
        }

        @Override
        public boolean isValid(final ContactCard contact, final ConstraintValidatorContext constraintValidatorContext) {
            final String searchType = uriInfo.getPathParameters().getFirst("searchType");
            final String searchValue = uriInfo.getQueryParameters().getFirst("q");

            if ("email".equals(searchType)) {
                return contact.getEmail() != null && contact.getEmail().contains(searchValue);
            } else if ("phone".equals(searchType)) {
                return contact.getPhone() != null && contact.getPhone().contains(searchValue);
            } else {
                return contact.getFullName().contains(searchValue);
            }
        }
    }

    public class ListValidator implements ConstraintValidator<NotEmptySearchField, List<ContactCard>> {

        @Context
        private UriInfo uriInfo;

        private Validator validator;

        @Override
        public void initialize(final NotEmptySearchField hasId) {
            validator = new Validator(uriInfo);
        }

        @Override
        public boolean isValid(final List<ContactCard> contacts, final ConstraintValidatorContext constraintValidatorContext) {
            boolean isValid = true;
            for (final ContactCard contactCard : contacts) {
                isValid &= validator.isValid(contactCard, constraintValidatorContext);
            }
            return isValid;
        }
    }
}
