Event.java

package at.medevit.elexis.agenda.ui.model;

import ch.elexis.agenda.data.Termin;
import ch.elexis.agenda.series.SerienTermin;
import ch.elexis.core.data.activator.CoreHub;
import ch.elexis.core.model.IPeriod;

/**
 * Model element representing an event than can be rendered using the javascript calendar contained
 * in this bundle. Transfer to javascript is done using JSON.
 * 
 * @author thomas
 *
 */
public class Event {
	private static final String DEFAULT_BG_COLOR = "ffffff";
	
	private String id;
	private String title;
	private String icon;
	
	private String start;
	private String end;
	
	private String borderColor;
	private String backgroundColor;
	private String textColor;
	
	private String rendering;
	private String description;
	private String resource;
	
	public String getId(){
		return id;
	}
	
	public void setId(String id){
		this.id = id;
	}
	
	public String getTitle(){
		return title;
	}
	
	public void setTitle(String title){
		this.title = title;
	}
	
	public String getStart(){
		return start;
	}
	
	public void setStart(String start){
		this.start = start;
	}
	
	public String getEnd(){
		return end;
	}
	
	public void setEnd(String end){
		this.end = end;
	}
	
	public String getBorderColor(){
		return borderColor;
	}
	
	public void setBorderColor(String borderColor){
		this.borderColor = borderColor;
	}
	
	public String getBackgroundColor(){
		return backgroundColor;
	}
	
	public void setBackgroundColor(String backgroundColor){
		this.backgroundColor = backgroundColor;
	}
	
	public String getTextColor(){
		return textColor;
	}
	
	public void setTextColor(String textColor){
		this.textColor = textColor;
	}
	
	public String getRendering(){
		return rendering;
	}
	
	public void setRendering(String rendering){
		this.rendering = rendering;
	}
	
	public String getDescription(){
		return description;
	}
	
	public void setDescription(String description){
		this.description = description;
	}
	
	public String getResource(){
		return resource;
	}
	
	public void setResource(String resource){
		this.resource = resource;
	}
	
	public void setIcon(String icon){
		this.icon = icon;
	}
	
	public String getIcon(){
		return icon;
	}
	
	/**
	 * Factory method to create a Event from an {@link IPeriod}.
	 * 
	 * @param iPeriod
	 * @return
	 */
	public static Event of(IPeriod iPeriod){
		Event ret = new Event();
		ret.id = iPeriod.getId();
		ret.start = iPeriod.getStartTime().toLocalDateTime().toString();
		ret.end = iPeriod.getEndTime().toLocalDateTime().toString();
		if(iPeriod instanceof Termin) {
			Termin termin = (Termin) iPeriod;
			ret.resource = termin.getBereich();
			Termin rootTermin = null;
			if (termin.isRecurringDate()
				&& (rootTermin = new SerienTermin(termin).getRootTermin()) != null) {
				ret.icon = "ui-icon-arrowrefresh-1-w";
				ret.title = rootTermin.getPersonalia();
			}
			else {
				ret.title = termin.getPersonalia();
			}
			if (isDayLimit(iPeriod)) {
				ret.rendering = "background";
			} else {
				ret.description =
					termin.getGrund().replaceAll("\n", "<br />") + "<br /><br />"
						+ termin.getStatusHistoryDesc(true).replaceAll("\n", "<br />");
				ret.borderColor = getStateColor(iPeriod);
				ret.backgroundColor = getTypColor(iPeriod);
				ret.textColor = getTextColor(ret.backgroundColor.substring(1));
			}
		}
		return ret;
	}
	
	/**
	 * Test if a {@link IPeriod} is a day limit.
	 * 
	 * @param iPeriod
	 * @return
	 */
	public static boolean isDayLimit(IPeriod iPeriod){
		if (iPeriod instanceof Termin) {
			String type = ((Termin) iPeriod).getType();
			String status = ((Termin) iPeriod).getStatus();
			return type.equals(Termin.typReserviert()) && status.equals(Termin.statusLeer());
		}
		return false;
	}
	
	/**
	 * Get the configured type color, default is #3a87ad.
	 * 
	 * @param iPeriod
	 * @return
	 */
	public static String getTypColor(IPeriod iPeriod){
		if (iPeriod instanceof Termin) {
			Termin termin = (Termin) iPeriod;
			return "#"
				+ CoreHub.userCfg.get("agenda/farben/typ/" + termin.getType(), DEFAULT_BG_COLOR); //$NON-NLS-1$
		}
		return "#" + DEFAULT_BG_COLOR;
	}
	
	/**
	 * Get the configured state color, default is #3a87ad.
	 * 
	 * @param iPeriod
	 * @return
	 */
	public static String getStateColor(IPeriod iPeriod){
		if (iPeriod instanceof Termin) {
			Termin termin = (Termin) iPeriod;
			return "#" + CoreHub.userCfg.get("agenda/farben/status/" + termin.getStatus(),
				DEFAULT_BG_COLOR); //$NON-NLS-2$
		}
		return "#" + DEFAULT_BG_COLOR;
	}
	
	/**
	 * Calculate the brightness of the bgColor and switch text color, black or white, depending on
	 * that value.
	 * 
	 * @param bgColor
	 * @return
	 */
	public static String getTextColor(String bgColor){
		int brightness = getPerceivedBrightness(Integer.parseInt(bgColor.substring(0, 2), 16),
			Integer.parseInt(bgColor.substring(2, 4), 16),
			Integer.parseInt(bgColor.substring(4, 6), 16));
		
		return brightness > 130 ? "#000000" : "#ffffff";
	}
	
	private static int getPerceivedBrightness(int red, int green, int blue){
		return (int) Math.sqrt(red * red * .299 + green * green * .587 + blue * blue * .114);
	}
}