/**
 * not implemented yet need to figure out where to hook into ui for user interaction
 * @author Steve
 *
 */
public class SentinelViewFilter extends ViewerFilter{

	private String regex;//the regex match to match the data set on.
	private String vulnTargetData;//the target data to filter through
	private SentinelLabelProvider labelProvider = new SentinelLabelProvider();//helper class grabs the vuln data necessary based on the target data specified
	private static SentinelViewFilter sentViewerFilter;

	public SentinelViewFilter()
	{
		sentViewerFilter = this;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	@Override
	public boolean select(Viewer viewer, Object parentElement, Object element) {

		if(regex == null || regex.length() == 0)
		return true;
		
		WhiteHatVulnerability vulnerability = (WhiteHatVulnerability) element;
		String data = (String) labelProvider.getColumnData(vulnTargetData, vulnerability);
		if(data.matches(regex))
			return true;
		else
			return false;
	}
	
	/**
	 * @param regex
	 */
	public void setSearchString(String regex)
	{
		this.regex = regex;
	}
	
	/**
	 * @param vulnTargetData
	 */
	public void setVulnTargetData(String vulnTargetData)
	{
		this.vulnTargetData = vulnTargetData;
	}

	public static SentinelViewFilter getInstance()
	{
		if(sentViewerFilter == null)
			return new SentinelViewFilter();
		
		return sentViewerFilter;
	}
}

class SentinelFilterListener implements Listener {

		@Override
		public void handleEvent(Event event) {
				 if (event.widget ==  btnAddFilter)
				 {
					String regex =  text.getText();
					String colName = combo.getText();// combo.getSelectionIndex()
					sentViewFilter.setSearchString(regex);
					sentViewFilter.setVulnTargetData(colName);
					TableViewer viewer = view.getInstance().getViewer();
					viewer.setFilters(new ViewerFilter[]{sentViewFilter});
				 }
				 else if(event.widget == btnRemoveFilter)
				 {
					 TableViewer viewer = view.getInstance().getViewer();
					 viewer.resetFilters();
			     }
				 
				 
		      }		
		}

	}