package net.sourceforge.fenixedu.predicates;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.UnitSite;
import net.sourceforge.fenixedu.domain.UnitSiteLink;
import net.sourceforge.fenixedu.domain.person.RoleType;
import net.sourceforge.fenixedu.injectionCode.AccessControl;
import net.sourceforge.fenixedu.injectionCode.AccessControlPredicate;

public class UnitSitePredicates {

    public static final AccessControlPredicate<UnitSite> managers = new AccessControlPredicate<UnitSite>() {

	public boolean evaluate(UnitSite site) {
	    Person person = AccessControl.getPerson();
	    return person.hasRole(RoleType.MANAGER) || person.hasRole(RoleType.SCIENTIFIC_COUNCIL) || site.hasManagers(person);
	}

    };

    public static final AccessControlPredicate<UnitSiteLink> linkSiteManagers = new AccessControlPredicate<UnitSiteLink>() {

	public boolean evaluate(UnitSiteLink link) {
	    UnitSite site = nullOr(link.getTopUnitSite(), link.getFooterUnitSite());
	    return site == null ? true : managers.evaluate(site);
	}

    };

    private static <T> T nullOr(T... args) {
	for (T value : args) {
	    if (value != null) {
		return value;
	    }
	}

	return null;
    }
}