package net.sourceforge.fenixedu.presentationTier.jsf.components;

import java.io.IOException;

import javax.faces.component.UIOutput;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.http.HttpServletRequest;

import net.sourceforge.fenixedu.domain.contents.Content;
import net.sourceforge.fenixedu.presentationTier.servlets.filters.ChecksumRewriter;
import net.sourceforge.fenixedu.presentationTier.servlets.filters.ContentInjectionRewriter;

public class UIContentLink extends UIOutput {

    public static final String COMPONENT_TYPE = UIContentLink.class.getName();
    public static final String COMPONENT_FAMILY = UIContentLink.class.getName();

    public UIContentLink() {
	super();
	this.setRendererType(null);
    }

    public String getFamily() {
	return UIContentLink.COMPONENT_FAMILY;
    }

    @Override
    public void encodeBegin(FacesContext context) throws IOException {

	if (!isRendered()) {
	    return;
	}

	ResponseWriter writer = context.getResponseWriter();
	Content content = (Content) this.getAttributes().get("content");
	String label = (String) this.getAttributes().get("label");

	if (content != null) {
	    final String prefix = content.isPublic() ? ChecksumRewriter.NO_CHECKSUM_PREFIX_HAS_CONTEXT_PREFIX
		    : ContentInjectionRewriter.HAS_CONTEXT_PREFIX;
	    writer.append(prefix);
	    writer.append("<a href=\"");
	    writer.append(getContextPath(context));
	    writer.append(content.getReversePath());
	    writer.append("\">").append(label).append("</a>");
	}
    }

    private static String getContextPath(FacesContext facesContext) {
	return ((HttpServletRequest) facesContext.getCurrentInstance().getExternalContext().getRequest()).getContextPath();
    }
}