package common.template.sample;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.etouch.contmgmt.common.CMUtils;
import net.etouch.contmgmt.wiki.TemplateTagResolver;

/**
 * This is a template of the class to interpret the value of the plugin defined. You need to override the method defined
 * translate(String regex, String content, String projectName, String title, String family, String ctx, String sessionId) in interface 
 * WikiContentTranslator. The plugin tag must start with a '#' (e.g #TEMP{zip="94555"})
 * <BR><BR>
 * Additionally, entries are required to make the plugin work in an application.<BR><BR>
 * 1) Create a jar file for this class (e.g jar -cf <FOLDER>:\samepage\tomcat\common\lib\custom_plugin.jar <FOLDER>:\temp\SampleTagResolver.class) provided
 *    you have JDK 1.4.2 <BR>
 * 2) Add the entry at the last in the file <FOLDER>:\samepage\cm\WEB-INF\lib\conf\wiki.plugins.<BR>
 *    e.g.<BR>
 *    ... , common.template.sample.SampleTagResolver<BR>
 * 3) Restart the samepage application and use the newely constructed plugin #TEMP{zip="94555"}<BR> 	         
 */

public class SampleTagResolver extends TemplateTagResolver
{
	/**
	 * Used to create multiple instances of plugin tag. It is used in method resolve(String content).
	 */
	int counter = 0;
	
	/**
	 * Default constructor of the class to instantiate the counter variable.
	 *
	 */
	public SampleTagResolver()
	{
		counter = 0;
	}
	
	/**
	 * Overloaded method
	 * @param regex
	 * @param content
	 * @param projectName
	 * @param title
	 * @param family
	 * @param ctx
	 * @param sessionId
	 * @return
	 */
	public String translate(String regex, String content, String projectName, String title, String family, String ctx, String sessionId)
	{
		Pattern pattern = Pattern.compile(regex, Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(content);
		StringBuffer sb = new StringBuffer();
		while(matcher.find())
		{
			String tmp = matcher.group(2);
			if( tmp != null && tmp.indexOf("#TEMP") != -1 )
			{
				tmp = resolveTag(tmp);
				matcher.appendReplacement(sb, CMUtils.escapeDollar(tmp));
			}
			else
			{
				matcher.appendReplacement(sb, "$1");
			}
		}
		matcher.appendTail(sb);
		return sb.toString();
	}
	
	/**
	 * This method enables to create multiple instances of the plugin tag.
	 * @param content
	 * @return
	 */
	private String resolveTag(String content)
	{
		String ret = content;
		String matchPat = "\\#TEMP\\{.*?(\\})";
		Pattern pattern = Pattern.compile(matchPat, Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(content);
		StringBuffer sb = new StringBuffer();
		String id = null;
		while(matcher.find())
		{
			counter++;
		    id="temp"+counter;
			String tmp = matcher.group();
			tmp = displayText(tmp,id,counter-1);
			matcher.appendReplacement(sb, CMUtils.escapeDollar(tmp));
		}
		matcher.appendTail(sb);
		return sb.toString();
	}
	
	/**
	 * This method contains the logic for the interpretation of the tag and returns the output to the screen. It call's the generic method
	 * getAttributeValue(String str, String attributeName) which return's the value of parameter passed to the plugin tag and the returned
	 * value can be used to add some additional logic for validation's.
	 * @param tag
	 * @param id
	 * @param counter
	 * @return
	 */
	private String displayText(String tag,String id,int counter)
	{
	    String ret = tag;
		try
		{
		    String zip = getAttributeValue(tag, "zip");
		    if(CMUtils.isBlankNull(zip))
		    {
		        ret = "Invalid zip code.";
		    }
		        ret = "Your current local temperature is " + 32 + " degrees Fahrenheit." ;
		}

		catch(Exception e)
		{
		    e.printStackTrace();
			ret = tag;
		}
		return ret;
	}

}