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package cgeo.geocaching;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.Display;
import android.view.WindowManager;
import cgeo.geocaching.utils.CollectionUtils;
public class StaticMapsProvider {
private static final String MARKERS_URL = "http://cgeo.carnero.cc/_markers/";
/**
* in my tests the "no image available" image had 5470 bytes, while "street only" maps had at least 20000 bytes
*/
private static final int MIN_MAP_IMAGE_BYTES = 6000;
private static void downloadMapsInThread(final cgCache cache, String latlonMap, int edge, String waypoints) {
createStorageDirectory(cache);
downloadMap(cache, 20, "satellite", 1, latlonMap, edge, waypoints);
downloadMap(cache, 18, "satellite", 2, latlonMap, edge, waypoints);
downloadMap(cache, 16, "roadmap", 3, latlonMap, edge, waypoints);
downloadMap(cache, 14, "roadmap", 4, latlonMap, edge, waypoints);
downloadMap(cache, 11 ,"roadmap", 5, latlonMap, edge, waypoints);
}
private static void createStorageDirectory(final cgCache cache) {
File dir = new File(cgSettings.getStorage());
if (dir.exists() == false) {
dir.mkdirs();
}
dir = new File(getStaticMapsDirectory(cache));
if (dir.exists() == false) {
dir.mkdirs();
}
}
private static String getStaticMapsDirectory(final cgCache cache) {
return cgSettings.getStorage() + cache.geocode;
}
private static void downloadMap(cgCache cache, int zoom, String mapType, int level, String latlonMap, int edge, String waypoints) {
String mapUrl = "http://maps.google.com/maps/api/staticmap?center=" + latlonMap;
String markerUrl = getMarkerUrl(cache);
String url = mapUrl + "&zoom=" + zoom + "&size=" + edge + "x" + edge + "&maptype=" + mapType + "&markers=icon%3A" + markerUrl + "%7C" + latlonMap + waypoints + "&sensor=false";
final String fileName = getStaticMapsDirectory(cache) + "/map_" + level;
HttpClient client = null;
HttpGet getMethod = null;
HttpResponse httpResponse = null;
HttpEntity entity = null;
BufferedHttpEntity bufferedEntity = null;
boolean ok = false;
for (int i = 0; i < 3; i ++) {
if (i > 0) Log.w(cgSettings.tag, "cgMapImg.getDrawable: Failed to download data, retrying. Attempt #" + (i + 1));
try {
client = new DefaultHttpClient();
getMethod = new HttpGet(url);
httpResponse = client.execute(getMethod);
entity = httpResponse.getEntity();
// if image is to small, don't download and save, there is no map data for this zoom level
long contentSize = entity.getContentLength();
if (contentSize > 0 && contentSize <= MIN_MAP_IMAGE_BYTES) {
break;
}
bufferedEntity = new BufferedHttpEntity(entity);
if (bufferedEntity != null) {
InputStream is = (InputStream)bufferedEntity.getContent();
FileOutputStream fos = new FileOutputStream(fileName);
int fileSize = 0;
try {
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = is.read(buffer)) != -1) {
fos.write(buffer, 0, bytesRead);
fileSize += bytesRead;
}
fos.flush();
ok = true;
} catch (IOException e) {
Log.e(cgSettings.tag, "cgMapImg.getDrawable (saving to cache): " + e.toString());
} finally {
is.close();
fos.close();
}
bufferedEntity = null;
// delete image if it has no contents
if (ok && fileSize < MIN_MAP_IMAGE_BYTES) {
(new File(fileName)).delete();
}
}
if (ok) {
break;
}
} catch (Exception e) {
Log.e(cgSettings.tag, "cgMapImg.getDrawable (downloading from web): " + e.toString());
}
}
}
public static void downloadMaps(cgCache cache, cgSettings settings, Activity activity) {
if (settings.storeOfflineMaps != 1 || cache.coords == null || StringUtils.isNotBlank(cache.geocode)) {
return;
}
final String latlonMap = String.format((Locale) null, "%.6f", cache.coords.getLatitude()) + "," +
String.format((Locale) null, "%.6f", cache.coords.getLongitude());
final Display display = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
final int maxWidth = display.getWidth() - 25;
final int maxHeight = display.getHeight() - 25;
int edge = 0;
if (maxWidth > maxHeight) {
edge = maxWidth;
} else {
edge = maxHeight;
}
final StringBuilder waypoints = new StringBuilder();
if (CollectionUtils.isNotEmpty(cache.waypoints)) {
for (cgWaypoint waypoint : cache.waypoints) {
if (waypoint.coords == null) {
continue;
}
waypoints.append("&markers=icon%3A");
waypoints.append(MARKERS_URL);
waypoints.append("marker_waypoint_");
waypoints.append(waypoint.type);
waypoints.append(".png%7C");
waypoints.append(String.format((Locale) null, "%.6f", waypoint.coords.getLatitude()));
waypoints.append(',');
waypoints.append(String.format((Locale) null, "%.6f", waypoint.coords.getLongitude()));
}
}
// download map images in separate background thread for higher performance
downloadMaps(cache, latlonMap, edge, waypoints.toString());
}
private static void downloadMaps(final cgCache cache, final String latlonMap, final int edge,
final String waypoints) {
Thread staticMapsThread = new Thread("getting static map") {@Override
public void run() {
downloadMapsInThread(cache, latlonMap, edge, waypoints);
}};
staticMapsThread.setPriority(Thread.MIN_PRIORITY);
staticMapsThread.start();
}
private static String getMarkerUrl(final cgCache cache) {
String type = "mystery";
if (cache.found) {
type = cache.type + "_found";
} else if (cache.disabled) {
type = cache.type + "_disabled";
} else {
type = cache.type;
}
return cgBase.urlencode_rfc3986(MARKERS_URL + "marker_cache_" + type + ".png");
}
}
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