package net.sourceforge.fenixedu.domain.accessControl;

import java.util.Set;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.Argument;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.GroupBuilder;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.operators.IdOperator;
import net.sourceforge.fenixedu.domain.organizationalStructure.Function;
import net.sourceforge.fenixedu.domain.organizationalStructure.PersonFunction;

import org.joda.time.YearMonthDay;

import pt.ist.fenixWebFramework.renderers.utils.RenderUtils;

/**
 * This group is an abstraction of all person currently performing a
 * {@link Function}. The elements of the group are all person that have and
 * active {@link PersonFunction} connected to the function.
 * 
 * @author cfgi
 */
public class PersonsInFunctionGroup extends DomainBackedGroup<Function> {

    /**
     * Serial version id.
     */
    private static final long serialVersionUID = 1L;

    public PersonsInFunctionGroup(Function object) {
	super(object);
    }

    @Override
    public Set<Person> getElements() {
	Set<Person> set = buildSet();

	YearMonthDay today = new YearMonthDay();
	for (PersonFunction function : getObject().getPersonFunctions()) {
	    if (function.isActive(today)) {
		set.add(function.getPerson());
	    }
	}

	return set;
    }

    @Override
    protected Argument[] getExpressionArguments() {
	return new Argument[] { new IdOperator(getObject()) };
    }

    @Override
    public String getName() {
	return RenderUtils.getFormatedResourceString("GROUP_NAME_RESOURCES", "label.name." + getClass().getSimpleName(),
		getObject().getName(), getObject().getUnit().getName());
    }

    public static class Builder implements GroupBuilder {

	public Group build(Object[] arguments) {
	    return new PersonsInFunctionGroup((Function) arguments[0]);
	}

	public int getMaxArguments() {
	    return 1;
	}

	public int getMinArguments() {
	    return 1;
	}

    }

}