TorrentCommentsAsyncLoader.java

package what.whatandroid.torrentgroup.group;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.content.AsyncTaskLoader;

import java.util.Collections;

import api.comments.SimpleComment;
import api.torrents.torrents.comments.TorrentComments;
import what.whatandroid.torrentgroup.TorrentGroupActivity;

/**
 * AsyncTaskLoader to load comments for some torrent, pass the torrent id
 * and the page number desired to be loaded. If the last page of comments is
 * desired then pass -1.
 */
public class TorrentCommentsAsyncLoader extends AsyncTaskLoader<TorrentComments> {
	private TorrentComments comments;
	private int groupId, page;

	public TorrentCommentsAsyncLoader(Context context, Bundle args) {
		super(context);
		groupId = args.getInt(TorrentGroupActivity.GROUP_ID);
		page = args.getInt(TorrentCommentsFragment.COMMENTS_PAGE, -1);
	}

	@Override
	public TorrentComments loadInBackground() {
		if (comments == null) {
			while (true) {
				//If we're loading the last page of comments then no page number is set. This lets us
				//mimic the site behavior of showing most recent comments first
				if (page == -1) {
					comments = TorrentComments.fromId(groupId);
				} else {
					comments = TorrentComments.fromId(groupId, page);
				}
				//If we get rate limited wait and retry. It's very unlikely the user has used all 5 of our
				//requests per 10s so don't wait the whole time initially
				if (comments != null && !comments.getStatus() && comments.getError() != null
						&& comments.getError().equalsIgnoreCase("rate limit exceeded")) {
					try {
						Thread.sleep(3000);
					} catch (InterruptedException e) {
						Thread.currentThread().interrupt();
					}
				} else {
					break;
				}
			}
			if (comments != null && comments.getStatus()) {
				//Sort the comments to have newest ones at the top
				Collections.sort(comments.getResponse().getComments(),
						Collections.reverseOrder(new SimpleComment.DateComparator()));
			}
		}
		return comments;
	}

	@Override
	protected void onStartLoading() {
		if (comments != null) {
			deliverResult(comments);
		} else {
			forceLoad();
		}
	}
}