FetchPictureService.java

package com.vaguehope.onosendai.update;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;

import android.content.Context;
import android.database.Cursor;

import com.vaguehope.onosendai.config.Column;
import com.vaguehope.onosendai.config.Config;
import com.vaguehope.onosendai.config.Prefs;
import com.vaguehope.onosendai.images.HybridBitmapCache;
import com.vaguehope.onosendai.model.Meta;
import com.vaguehope.onosendai.model.MetaType;
import com.vaguehope.onosendai.model.Tweet;
import com.vaguehope.onosendai.provider.ProviderMgr;
import com.vaguehope.onosendai.storage.TweetCursorReader;
import com.vaguehope.onosendai.ui.pref.FetchingPrefFragment;
import com.vaguehope.onosendai.util.LogWrapper;

public class FetchPictureService extends AbstractBgFetch<Meta> {

	private static final LogWrapper LOG = new LogWrapper("FPS");

	public static void startServiceIfConfigured (final Context context, final Prefs prefs, final Collection<Column> columns, final boolean manual) {
		AbstractBgFetch.startServiceIfConfigured(FetchPictureService.class, FetchingPrefFragment.KEY_PREFETCH_MEDIA, context, prefs, columns, manual);
	}

	public FetchPictureService () {
		super(FetchPictureService.class, false, LOG);
	}

	@Override
	protected void readUrls (final Cursor cursor, final TweetCursorReader reader, final Column col, final Config conf, final List<Meta> retMetas) {
		final String avatarUrl = reader.readAvatar(cursor);
		if (avatarUrl != null) retMetas.add(new Meta(MetaType.MEDIA, avatarUrl)); // Fake meta for type consistency.

		final List<Meta> mediaMetas = getDb().getTweetMetasOfType(reader.readUid(cursor), MetaType.MEDIA);
		if (mediaMetas != null) {
			for (final Meta m : mediaMetas) {
				if (m.getData() != null) retMetas.add(m);
			}
		}
	}

	@Override
	protected void readUrls (final Tweet tweet, final Column col, final Config conf, final List<Meta> retMetas) {
		if (tweet.getAvatarUrl() != null) retMetas.add(new Meta(MetaType.MEDIA, tweet.getAvatarUrl())); // Fake meta for type consistency.

		for (final Meta meta : tweet.getMetas()) {
			if (meta.getType() == MetaType.MEDIA && meta.getData() != null) {
				retMetas.add(meta);
			}
		}
	}

	@Override
	protected void makeJobs (final List<Meta> metas, final ProviderMgr provMgr, final Map<String, Callable<?>> jobs) {
		final HybridBitmapCache hybridBitmapCache = new HybridBitmapCache(this, 0);
		for (final Meta meta : metas) {
			if (!hybridBitmapCache.touchFileIfExists(meta.getData())) {
				jobs.put(meta.getData(), new FetchPicture(hybridBitmapCache, meta.getData()));
			}
		}
	}

}