com.huguesjohnson.retroleague.rss.RssParserHandler.java Source code

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Here is the source code for com.huguesjohnson.retroleague.rss.RssParserHandler.java

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/*
RetroLeague - Mobile application for The Retro League Podcast
Copyright (C) 2010-2018 Hugues Johnson
    
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.huguesjohnson.retroleague.rss;

import java.util.ArrayList;
import java.util.Date;

import org.apache.commons.lang3.StringEscapeUtils;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.huguesjohnson.retroleague.StreamEntry;
import com.huguesjohnson.retroleague.StreamEntry.Sources;
import com.huguesjohnson.retroleague.util.BruteForceDateParser;

import android.util.Log;

public class RssParserHandler extends DefaultHandler {
    private final static String TAG = "HeadlineParserHandler";
    private final static String TAG_ITEM = "item";
    private final static String TAG_TITLE = "title";
    private final static String TAG_DESCRIPTION = "description";
    private final static String TAG_PUBDATE = "pubDate";
    private final static String TAG_LINK = "link";
    private ArrayList<StreamEntry> entryList = new ArrayList<StreamEntry>();
    private StreamEntry currentEntry = null;
    private StringBuilder characters = new StringBuilder();
    private boolean readThis = false;
    private boolean inItemBlock = false;
    private BruteForceDateParser dateParser;
    private Date minimumDate;
    private Sources source;

    public RssParserHandler(Date minimumDate, Sources source) {
        super();
        this.minimumDate = minimumDate;
        this.source = source;
        this.dateParser = BruteForceDateParser.getInstance();
    }

    public ArrayList<StreamEntry> getEntryList() {
        return (this.entryList);
    }

    @Override
    public void startDocument() throws SAXException {
        super.startDocument();
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        super.characters(ch, start, length);
        if (readThis) {
            this.characters.append(ch, start, length);
        }
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes)
            throws SAXException {
        super.startElement(uri, localName, qName, attributes);
        try {
            String tagName = localName;
            if ((tagName == null) || (tagName.length() < 1)) {
                tagName = qName;
            }
            if (tagName.equalsIgnoreCase(TAG_TITLE)) {
                readThis = true;
                this.characters.setLength(0);
            } else if (tagName.equalsIgnoreCase(TAG_ITEM)) {
                this.currentEntry = new StreamEntry();
                this.currentEntry.setSource(this.source);
                inItemBlock = true;
            }
            if (this.currentEntry != null) {
                if (tagName.equalsIgnoreCase(TAG_DESCRIPTION)) {
                    readThis = true;
                    this.characters.setLength(0);
                } else if (tagName.equalsIgnoreCase(TAG_PUBDATE)) {
                    readThis = true;
                    this.characters.setLength(0);
                } else if (tagName.equalsIgnoreCase(TAG_LINK)) {
                    readThis = true;
                    this.characters.setLength(0);
                }
            }
        } catch (Exception x) {
            Log.e(TAG, "startElement", x);
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        super.endElement(uri, localName, qName);
        try {
            String tagName = localName;
            if ((tagName == null) || (tagName.length() < 1)) {
                tagName = qName;
            }
            if (inItemBlock) {
                if (tagName.equalsIgnoreCase(TAG_ITEM)) {
                    if (this.currentEntry.getPostedDate().compareTo(this.minimumDate) > 0) {
                        this.entryList.add(this.currentEntry);
                    }
                    this.currentEntry = null;
                    readThis = false;
                    inItemBlock = false;
                } else if (tagName.equalsIgnoreCase(TAG_TITLE)) {
                    //check if this is the rss channel title or the item title
                    if (this.currentEntry != null) {
                        String title = this.characters.toString();
                        if (this.source == Sources.Facebook) {
                            title = StringEscapeUtils.unescapeHtml4(title);
                        }
                        this.currentEntry.setTitle(title);
                    }
                    readThis = false;
                } else if (tagName.equalsIgnoreCase(TAG_DESCRIPTION)) {
                    //check if this is the rss channel description or the item description
                    if (this.currentEntry != null) {
                        //TODO - hack to ensure content is html, maybe look for a less hacky solution
                        StringBuffer content = new StringBuffer(this.characters.toString());
                        if ((!content.substring(0, 1).equals("<")) || (!content.substring(0, 4).equals("&lt;"))) {
                            content.insert(0, "<p>");
                            content.append("</p>");
                        }
                        this.currentEntry.setContent(content.toString());
                    }
                    readThis = false;
                } else if (tagName.equalsIgnoreCase(TAG_PUBDATE)) {
                    String sDate = this.characters.toString();
                    this.currentEntry.setPostedDate(this.dateParser.parseDate(sDate));
                    readThis = false;
                } else if (tagName.equalsIgnoreCase(TAG_LINK)) {
                    //check if this is the rss channel link or the item link
                    if (this.currentEntry != null) {
                        this.currentEntry.setUrl(this.characters.toString());
                    }
                    readThis = false;
                }
            } else {
                if (tagName.equalsIgnoreCase(TAG_TITLE)) {
                    //don't care about the rss channel title
                    readThis = false;
                }
            }
        } catch (Exception x) {
            Log.e(TAG, "endElement", x);
        }
    }

}