ApprovedEnrolmentsToCreateDocumentRequestProvider.java

/**
 * Copyright © 2002 Instituto Superior Técnico
 *
 * This file is part of FenixEdu Academic.
 *
 * FenixEdu Academic is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FenixEdu Academic is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with FenixEdu Academic.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fenixedu.academic.ui.renderers.providers.serviceRequests;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.stream.Collectors;

import org.fenixedu.academic.domain.Degree;
import org.fenixedu.academic.domain.Enrolment;
import org.fenixedu.academic.domain.accessControl.academicAdministration.AcademicAccessRule;
import org.fenixedu.academic.domain.accessControl.academicAdministration.AcademicOperationType;
import org.fenixedu.academic.domain.degreeStructure.CycleType;
import org.fenixedu.academic.domain.student.Registration;
import org.fenixedu.academic.domain.studentCurriculum.CycleCurriculumGroup;
import org.fenixedu.academic.domain.studentCurriculum.InternalEnrolmentWrapper;
import org.fenixedu.academic.dto.serviceRequests.DocumentRequestCreateBean;
import org.fenixedu.bennu.core.security.Authenticate;

import pt.ist.fenixWebFramework.rendererExtensions.converters.DomainObjectKeyArrayConverter;
import pt.ist.fenixWebFramework.renderers.DataProvider;
import pt.ist.fenixWebFramework.renderers.components.converters.Converter;

public class ApprovedEnrolmentsToCreateDocumentRequestProvider implements DataProvider {

    @Override
    public Converter getConverter() {
        return new DomainObjectKeyArrayConverter();
    }

    @Override
    public Object provide(Object source, Object currentValue) {
        final DocumentRequestCreateBean documentRequestCreateBean = (DocumentRequestCreateBean) source;

        Set<Degree> degrees =
                AcademicAccessRule.getDegreesAccessibleToFunction(AcademicOperationType.SERVICE_REQUESTS, Authenticate.getUser())
                        .collect(Collectors.toSet());
        SortedSet<Enrolment> aprovedEnrolments = new TreeSet<Enrolment>(Enrolment.COMPARATOR_BY_NAME_AND_ID);
        for (Degree degree : degrees) {
            for (final Registration registration : documentRequestCreateBean.getStudent().getRegistrationsFor(degree)) {
                aprovedEnrolments.addAll(registration.getApprovedEnrolments());
            }
        }
        documentRequestCreateBean.setEnrolments(new ArrayList<Enrolment>(aprovedEnrolments));
        filter(aprovedEnrolments, documentRequestCreateBean);

        return aprovedEnrolments;
    }

    private void filter(final SortedSet<Enrolment> aprovedEnrolments, DocumentRequestCreateBean documentRequestCreateBean) {
        final CycleType cycleType = documentRequestCreateBean.getRequestedCycle();
        if (cycleType != null) {
            final Iterator<Enrolment> elements = aprovedEnrolments.iterator();
            while (elements.hasNext()) {
                final Enrolment enrolment = elements.next();
                if (!hasCycleType(enrolment, cycleType) && !isSourceInAnyCycleGroup(enrolment, cycleType)) {
                    elements.remove();
                }
            }
        }
    }

    private boolean hasCycleType(final Enrolment enrolment, final CycleType cycleType) {
        CycleCurriculumGroup cycleCurriculumGroup = enrolment.getParentCycleCurriculumGroup();
        return cycleCurriculumGroup != null && cycleCurriculumGroup.getCycleType() == cycleType;
    }

    private boolean isSourceInAnyCycleGroup(final Enrolment enrolment, final CycleType cycleType) {
        for (final InternalEnrolmentWrapper wrapper : enrolment.getEnrolmentWrappersSet()) {
            if (wrapper.getCredits().hasAnyDismissalInCycle(cycleType)) {
                return true;
            }
        }
        return false;
    }

}