CommentHelper.java

package com.cnblogs.android.core;

import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import com.cnblogs.android.entity.*;
import com.cnblogs.android.parser.CommentListXmlParser;
import com.cnblogs.android.utility.AppUtil;
import com.cnblogs.android.utility.NetHelper;

/**
 * Comment������
 * 
 * @author walkingp
 * @date 2011-11-29
 */
public class CommentHelper extends DefaultHandler {
	/**
	 * ����ҳ�뷵��Comment���󼯺�
	 * 
	 * @return pageIndex:ҳ�룬��1��ʼ
	 */
	public static ArrayList<Comment> GetCommentList(int contentId,
			int pageIndex, Comment.EnumCommentType commentType) {
		int pageSize = Config.COMMENT_PAGE_SIZE;
		String url = Config.URL_NEWS_GET_COMMENT_LIST;
		if (commentType.equals(Comment.EnumCommentType.Blog)) {
			url = Config.URL_BLOG_GET_COMMENT_LIST;
		}
		url = url.replace("{contentId}", String.valueOf(contentId))
				.replace("{pageIndex}", String.valueOf(pageIndex))
				.replace("{pageSize}", String.valueOf(pageSize));// ���ݵ�ַ
		String dataString = NetHelper.GetContentFromUrl(url);

		ArrayList<Comment> list = ParseString(contentId, dataString,
				commentType);

		return list;
	}
	/*
	 * �������ݵ���������
	 */
	public static List<Comment> GetCommentList(int contentId,
			Comment.EnumCommentType commentType, int commentCount) {
		List<Comment> listComment = new ArrayList<Comment>();
		int pageSize = 0;// ��ҳ����
		int pageCount = 0;// ��ҳ��
		switch (commentType) {
			case Blog :
				pageSize = Config.BLOG_PAGE_SIZE;
				break;
			case News :
				pageSize = Config.NEWS_PAGE_SIZE;
				break;
		}
		pageCount = commentCount % pageSize == 0
				? commentCount / pageSize
				: commentCount / pageSize + 1;
		for (int i = 1; i < pageCount + 1; i++) {
			List<Comment> list = GetCommentList(contentId, i, commentType);
			listComment.addAll(list);
		}

		return listComment;
	}
	/**
	 * ���ַ���ת��ΪComment����
	 * 
	 * @return
	 */
	private static ArrayList<Comment> ParseString(int contentId,
			String dataString, Comment.EnumCommentType commentType) {
		SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
		ArrayList<Comment> listComment = new ArrayList<Comment>();
		try {
			XMLReader xmlReader = saxParserFactory.newSAXParser()
					.getXMLReader();
			CommentListXmlParser handler = new CommentListXmlParser(contentId,
					listComment, commentType);
			xmlReader.setContentHandler(handler);

			xmlReader.parse(new InputSource(new StringReader(dataString)));
			listComment = handler.GetCommentList();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		return listComment;
	}
	/**
	 * ��ʽ���������� 1����'@name'���ð��
	 * 
	 * @hchxxzx<br/> <a href="#2256199" title="�鿴���ظ�������">@</a>hchxxzx<br/>
	 *               ���� 2����ʽ�����ò��� <fieldset
	 *               class="comment_quote"><legend>����</legend>�̣�<br/>
	 *               ��磬�����Ӳ���Ϊ�˲����</fieldset><br/>
	 * @param html
	 * @return
	 */
	static final Pattern patternAtNoLink = Pattern.compile("@([^<]+)");
	static final Pattern patternAt = Pattern.compile("<a(.+?)>@</a>([^<]+)");
	static final Pattern patternQuote = Pattern
			.compile("<fieldset(.+?)><legend>(.+?)</legend>(.+?)��?<br\\s?/>(.+?)</fieldset>");// ����
	public static String FormatCommentString(String html) {
		// �滻�ظ�
		Matcher m = patternAtNoLink.matcher(html);
		String rs = new String(html);
		while (m.find()) {
			rs = m.replaceAll("@$1��");
		}
		m = patternAt.matcher(rs);
		while (m.find()) {
			rs = m.replaceAll("@$2��");
		}
		// �滻����
		m = patternQuote.matcher(rs);
		while (m.find()) {
			rs = m.replaceAll("$1��");
			rs = m.replaceAll("@$2");
			rs = m.replaceAll("$3��");
		}
		// �滻ͼƬ
		rs = AppUtil.RemoveImgTag(rs);
		// �滻��Ƶ
		rs = AppUtil.RemoveVideoTag(rs);

		return rs;
	}
}