package tim.prune.function.search;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import tim.prune.App;
import tim.prune.I18nManager;
import tim.prune.data.DataPoint;
import tim.prune.data.Distance;
import tim.prune.data.Field;
import tim.prune.data.Latitude;
import tim.prune.data.Longitude;
import tim.prune.data.SourceInfo;
import tim.prune.data.UnitSetLibrary;
import tim.prune.load.MediaLinkInfo;
/**
* Function to search mapillary for photos
*/
public class SearchMapillaryFunction extends GenericDownloaderFunction
{
/** Maximum number of results to get */
private static final int MAX_RESULTS = 20;
/**
* Constructor
* @param inApp app object
*/
public SearchMapillaryFunction(App inApp)
{
super(inApp);
}
@Override
public String getNameKey() {
return "function.mapillary";
}
@Override
protected String getColumnKey(int inColNum)
{
if (inColNum == 0) return "dialog.wikipedia.column.name";
return "dialog.wikipedia.column.distance";
}
/**
* Run method, for searching in a separate thread
*/
public void run()
{
_statusLabel.setText(I18nManager.getText("confirm.running"));
// Get coordinates from current point (if any) or from centre of screen
double lat = 0.0, lon = 0.0;
DataPoint currentPoint = _app.getTrackInfo().getCurrentPoint();
if (currentPoint == null)
{
double[] coords = _app.getViewport().getBounds();
lat = (coords[0] + coords[2]) / 2.0;
lon = (coords[1] + coords[3]) / 2.0;
}
else
{
lat = currentPoint.getLatitude().getDouble();
lon = currentPoint.getLongitude().getDouble();
}
// Construct URL
final String urlString = "http://api.mapillary.com/v1/im/close?lat="
+ lat + "&lon=" + lon + "&distance=1000&limit=" + MAX_RESULTS;
//System.out.println(urlString);
InputStream inStream = null;
try
{
inStream = new URL(urlString).openStream();
StringBuilder sb = new StringBuilder();
int ch = 0;
while ((ch = inStream.read()) >= 0)
{
sb.append((char) ch);
}
//System.out.println("Got answer: '" + sb.toString() + "'");
ArrayList<SearchResult> resultList = new ArrayList<SearchResult>();
for (String result : sb.toString().split("\\},\\{"))
{
//System.out.println("Result: '" + result + "'");
SearchResult sr = new SearchResult();
for (String prop : result.split(","))
{
String key = getKey(prop);
if (key == null) {continue;}
if (key.equals("key"))
{
final String value = getValue(prop);
sr.setDownloadLink("http://images.mapillary.com/" + value + "/thumb-1024.jpg");
sr.setWebUrl("http://www.mapillary.com/map/im/" + value);
sr.setTrackName(value);
}
else if (key.equals("lat")) {
sr.setLatitude(getValue(prop));
}
else if (key.equals("lon")) {
sr.setLongitude(getValue(prop));
}
}
if (sr.getLatitude() != null && sr.getLongitude() != null && sr.getTrackName() != null)
{
// Calculate distance away from current point and set this in sr.setLength
DataPoint resultPoint = new DataPoint(new Latitude(sr.getLatitude()), new Longitude(sr.getLongitude()), null);
if (resultPoint.isValid() && currentPoint != null && currentPoint.isValid())
{
double radianDist = DataPoint.calculateRadiansBetween(currentPoint, resultPoint);
double metresAway = Distance.convertRadiansToDistance(radianDist, UnitSetLibrary.UNITS_METRES);
sr.setLength(metresAway);
}
// If there's a valid result, add it to the temporary list
if (sr.getTrackName() != null) {
resultList.add(sr);
}
}
}
// Add all the results to the table model in one go
if (!resultList.isEmpty()) {
_trackListModel.addTracks(resultList);
}
}
catch (Exception e) {
_errorMessage = e.getClass().getName() + " - " + e.getMessage();
}
// Close stream and ignore errors
try {
inStream.close();
} catch (Exception e) {}
// Set status label according to error or "none found", leave blank if ok
if (_errorMessage == null && _trackListModel.isEmpty()) {
_errorMessage = I18nManager.getText("dialog.mapillary.nonefound");
}
_statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
}
/**
* From a JSON key:value string, return just the key
* @param inString string to parse
* @return just the key without the surrounding quotes, or null if not found
*/
private static String getKey(String inString)
{
if (inString == null || inString.equals("")) {return null;}
final int colonPos = inString.indexOf(':');
if (colonPos <= 0) {return null;}
int startPos = 0;
char c;
while ((c = inString.charAt(startPos)) == '['
|| c == '{' || c == '\"')
{
startPos++;
}
int endPos = colonPos;
while ((c = inString.charAt(endPos-1)) == '\"')
{
endPos--;
}
return inString.substring(startPos, endPos);
}
/**
* From a JSON key:value string, return just the value
* @param inString string to parse
* @return just the value without the surrounding quotes
*/
private static String getValue(String inString)
{
final int colonPos = inString.indexOf(':');
if (colonPos <= 0 || colonPos >= inString.length()) {return null;}
int startPos = colonPos+1;
char c;
while ((c = inString.charAt(startPos)) == '\"')
{
startPos++;
}
int endPos = inString.length()-1;
while ((c = inString.charAt(endPos-1)) == '\"'
|| c == '}' || c == ']')
{
endPos--;
}
return inString.substring(startPos, endPos);
}
@Override
protected void loadSelected()
{
// Find the row(s) selected in the table and get the corresponding track
int numSelected = _trackTable.getSelectedRowCount();
if (numSelected < 1) return;
int[] rowNums = _trackTable.getSelectedRows();
String[][] pointData = new String[numSelected][];
String[] linkArray = new String[numSelected];
// Loop over each of the selected points
for (int i=0; i<numSelected; i++)
{
pointData[i] = new String[3]; // lat, long, segment
int rowNum = rowNums[i];
if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
{
SearchResult result = _trackListModel.getTrack(rowNum);
//String url = result.getDownloadLink();
pointData[i][0] = result.getLatitude();
pointData[i][1] = result.getLongitude();
pointData[i][2] = "1"; // all points have a new segment
linkArray[i] = result.getDownloadLink();
}
}
// Prepare the data for the app
final Field[] fields = {Field.LATITUDE, Field.LONGITUDE, Field.NEW_SEGMENT};
_app.autoAppendNextFile();
_app.informDataLoaded(fields, pointData, null, new SourceInfo("mapillary", SourceInfo.FILE_TYPE.JSON),
null, new MediaLinkInfo(linkArray));
// Close the dialog
_cancelled = true;
_dialog.dispose();
}
}