NSRSS20.java

package de.danoeh.antennapodsp.syndication.namespace;

import android.util.Log;
import de.danoeh.antennapodsp.AppConfig;
import de.danoeh.antennapodsp.feed.FeedImage;
import de.danoeh.antennapodsp.feed.FeedItem;
import de.danoeh.antennapodsp.feed.FeedMedia;
import de.danoeh.antennapodsp.syndication.handler.HandlerState;
import de.danoeh.antennapodsp.syndication.util.SyndDateUtils;
import de.danoeh.antennapodsp.syndication.util.SyndTypeUtils;
import org.xml.sax.Attributes;

/**
 * SAX-Parser for reading RSS-Feeds
 *
 * @author daniel
 */
public class NSRSS20 extends Namespace {
    private static final String TAG = "NSRSS20";
    public static final String NSTAG = "rss";
    public static final String NSURI = "";

    public final static String CHANNEL = "channel";
    public final static String ITEM = "item";
    public final static String GUID = "guid";
    public final static String TITLE = "title";
    public final static String LINK = "link";
    public final static String DESCR = "description";
    public final static String PUBDATE = "pubDate";
    public final static String ENCLOSURE = "enclosure";
    public final static String IMAGE = "image";
    public final static String URL = "url";
    public final static String LANGUAGE = "language";

    public final static String ENC_URL = "url";
    public final static String ENC_LEN = "length";
    public final static String ENC_TYPE = "type";

    @Override
    public SyndElement handleElementStart(String localName, HandlerState state,
                                          Attributes attributes) {
        if (localName.equals(ITEM)) {
            state.setCurrentItem(new FeedItem());
            state.getItems().add(state.getCurrentItem());
            state.getCurrentItem().setFeed(state.getFeed());

        } else if (localName.equals(ENCLOSURE)) {
            String type = attributes.getValue(ENC_TYPE);
            String url = attributes.getValue(ENC_URL);
            if (state.getCurrentItem().getMedia() == null
                    && (SyndTypeUtils.enclosureTypeValid(type) || ((type = SyndTypeUtils
                    .getValidMimeTypeFromUrl(url)) != null))) {

                long size = 0;
                try {
                    size = Long.parseLong(attributes.getValue(ENC_LEN));
                } catch (NumberFormatException e) {
                    if (AppConfig.DEBUG)
                        Log.d(TAG, "Length attribute could not be parsed.");
                }
                state.getCurrentItem().setMedia(
                        new FeedMedia(state.getCurrentItem(), url, size, type));
            }

        } else if (localName.equals(IMAGE)) {
            if (state.getTagstack().size() >= 1) {
                String parent = state.getTagstack().peek().getName();
                if (parent.equals(CHANNEL)) {
                    state.getFeed().setImage(new FeedImage());
                }
            }
        }
        return new SyndElement(localName, this);
    }

    @Override
    public void handleElementEnd(String localName, HandlerState state) {
        if (localName.equals(ITEM)) {
            if (state.getCurrentItem() != null) {
                // the title tag is optional in RSS 2.0. The description is used
                // as a
                // title if the item has no title-tag.
                if (state.getCurrentItem().getTitle() == null) {
                    state.getCurrentItem().setTitle(
                            state.getCurrentItem().getDescription());
                }

                if (state.getTempObjects().containsKey(NSITunes.DURATION)) {
                    if (state.getCurrentItem().hasMedia()) {
                        state.getCurrentItem().getMedia().setDuration((Integer) state.getTempObjects().get(NSITunes.DURATION));
                    }
                    state.getTempObjects().remove(NSITunes.DURATION);
                }
            }
            state.setCurrentItem(null);
        } else if (state.getTagstack().size() >= 2
                && state.getContentBuf() != null) {
            String content = state.getContentBuf().toString();
            SyndElement topElement = state.getTagstack().peek();
            String top = topElement.getName();
            SyndElement secondElement = state.getSecondTag();
            String second = secondElement.getName();
            String third = null;
            if (state.getTagstack().size() >= 3) {
                third = state.getThirdTag().getName();
            }

            if (top.equals(GUID) && second.equals(ITEM)) {
                state.getCurrentItem().setItemIdentifier(content);
            } else if (top.equals(TITLE)) {
                if (second.equals(ITEM)) {
                    state.getCurrentItem().setTitle(content);
                } else if (second.equals(CHANNEL)) {
                    state.getFeed().setTitle(content);
                } else if (second.equals(IMAGE) && third != null
                        && third.equals(CHANNEL)) {
                    state.getFeed().getImage().setTitle(content);
                }
            } else if (top.equals(LINK)) {
                if (second.equals(CHANNEL)) {
                    state.getFeed().setLink(content);
                } else if (second.equals(ITEM)) {
                    state.getCurrentItem().setLink(content);
                }
            } else if (top.equals(PUBDATE) && second.equals(ITEM)) {
                state.getCurrentItem().setPubDate(
                        SyndDateUtils.parseRFC822Date(content));
            } else if (top.equals(URL) && second.equals(IMAGE) && third != null
                    && third.equals(CHANNEL)) {
                state.getFeed().getImage().setDownload_url(content);
            } else if (localName.equals(DESCR)) {
                if (second.equals(CHANNEL)) {
                    state.getFeed().setDescription(content);
                } else if (second.equals(ITEM)) {
                    state.getCurrentItem().setDescription(content);
                }

            } else if (localName.equals(LANGUAGE)) {
                state.getFeed().setLanguage(content.toLowerCase());
            }
        }
    }

}