SubjectDisplaySettingHandler.java

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package org.dlect.controller.helper.subject;

import org.dlect.controller.MainController;
import org.dlect.controller.helper.Initilisable;
import org.dlect.events.Event;
import org.dlect.events.EventListener;
import org.dlect.model.Database;
import org.dlect.model.Semester;
import org.dlect.model.Subject;
import org.dlect.model.Subject.SubjectEventID;

/**
 *
 * @author lee
 */
public class SubjectDisplaySettingHandler implements EventListener, Initilisable {

    private final MainController mc;
    private SubjectDisplaySettingHelper helper;

    public SubjectDisplaySettingHandler(MainController mc) {
        this.mc = mc;
        mc.addListener(this, Database.class, Subject.class);
    }

    @Override
    public void init() {
        helper = new SubjectDisplaySettingHelper(mc.getDatabaseHandler().getDatabase());
    }

    public boolean isSemesterDisplayed(Semester s) {
        if (s.getSubjects().isEmpty()) {
            return false;
        }
        for (Subject sub : s.getSubjects()) {
            if (!isSubjectDisplayed(sub)) {
                return false;
            }
        }
        return true;
    }

    public void setSemesterDisplayed(Semester s, boolean b) {
        for (Subject sub : s.getSubjects()) {
            setSubjectDisplayed(sub, b);
        }
    }

    public boolean isSubjectDisplayed(Subject s) {
        return helper.isSubjectDisplayed(s);
    }

    public void setSubjectDisplayed(Subject s, boolean b) {
        helper.setSubjectDisplayed(s, b);
    }

    @Override
    public void processEvent(Event e) {
        if (helper == null) {
            return;
        }
        if (e.getEventID().equals(SubjectEventID.ID)) {
            String before = (String) e.getBefore();
            String after = (String) e.getAfter();

            if (before == null) {
                // Add so ignore.
            } else if (after == null) {
                // remove so remove the key from the map.
                mc.getDatabaseHandler().removeSetting(helper.getKeyFor(before));
            } else {
                // Re-name.
                String oldValue = mc.getDatabaseHandler().getSetting(helper.getKeyFor(before));
                mc.getDatabaseHandler().removeSetting(helper.getKeyFor(before));

                mc.getDatabaseHandler().addSetting(helper.getKeyFor(after), oldValue);
            }
        }
    }

}