/**
* Verwijdert polygonen lokaal als ze niet meer op de server staan. Naam van deze methode (C)
* Joost Maar de inhoud van deze methode wel (C) Mathijs
*
* @param polygonIds een lijstje met polygonid's die op de server voorkomen (in deze groep)
* @throws SyncException
*/
private void removeDeletedPolygons(int group) throws SyncException {
Cursor c = db.getAllPolygons(group);
if (!c.moveToFirst()) {
return; // Lokale db is al leeg
}
// Lijstje maken met alle id's op de server
ArrayList<Integer> polygonIds = new ArrayList<Integer>();
HttpGet httpg = new HttpGet(serverUrl + "polygons/group_id/" + group + "/since/1");
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(mappUser, mappPass);
try {
httpg.addHeader(new BasicScheme().authenticate(creds, httpg));
} catch (AuthenticationException e1) {
Log.e(Mapp.TAG, e1.getMessage());
throw new SyncException("Authentication failed");
}
HttpResponse response;
try {
response = httpclient.execute(httpg);
// Lees het resultaat van de actie in
InputStream is = response.getEntity().getContent();
BufferedReader r = new BufferedReader(new InputStreamReader(is));
StringBuilder total = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
total.append(line);
}
if (response.getStatusLine().getStatusCode() == 418) {
throw new SyncException("Unable to synchronize because the server is a teapot.");
} else if (response.getStatusLine().getStatusCode() == 401) {
throw new SyncException("Not authorized");
} else if (response.getStatusLine().getStatusCode() == 404) {
// Geen polygonen hier
do {
if (!(c.getInt(3) == 1)) {
db.removePolygon(c.getInt(0), false);
}
} while (c.moveToNext());
return;
} else if (response.getStatusLine().getStatusCode() != 200) {
// Er is iets mis gegaan.
JSONObject result = new JSONObject(total.toString());
Log.e(Mapp.TAG, "Sync error: " + result.getString("message"));
throw new SyncException(result.getString("message"));
} else {
// Alles is blijkbaar goed gegaan
JSONArray result = new JSONArray(total.toString());
// Loop over de polygonen heen
for (int i = 0; i < result.length(); i++) {
JSONObject polygon = result.getJSONObject(i);
polygonIds.add(polygon.getInt("id"));
}
}
} catch (ClientProtocolException e) {
Log.e(Mapp.TAG, e.getMessage());
throw new SyncException("Epic HTTP failure");
} catch (IOException e) {
Log.e(Mapp.TAG, e.getMessage());
throw new SyncException("Exception during server synchronisation");
} catch (JSONException e) {
Log.e(Mapp.TAG, "Sync failed. Response is no valid JSON or expected variable not found.");
throw new SyncException("Invalid server response");
}
// Nu we eindelijk alle id's hebben, kijken of er in de lokale db id's voorkomen die niet in
// onze nieuwe lijst zitten
do {
if (!polygonIds.contains(c.getInt(0)) && c.getInt(3) != 1) {
db.removePolygon(c.getInt(0), false);
}
} while (c.moveToNext());
}
/**
* Synchroniseert gewijzigde polygonen met de server
*
* @param group het id van de groep waaruit polygonen gesynct moeten worden
* @throws SyncException
*/
private void postPolygons(int group) throws SyncException {
Cursor c = db.getChangedPolygons(group);
int polygonid = 0;
String name = "";
String color = "";
String desc = "";
if (!c.moveToFirst()) {
return; // Niks te syncen, dus gelijk klaar!
}
do {
HttpPost httpp = new HttpPost(serverUrl + "polygon");
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(mappUser, mappPass);
polygonid = c.getInt(0);
name = c.getString(2);
color = c.getString(1);
desc = c.getString(3);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", polygonid + ""));
nameValuePairs.add(new BasicNameValuePair("name", name));
nameValuePairs.add(new BasicNameValuePair("group_id", group + ""));
nameValuePairs.add(new BasicNameValuePair("color", color));
nameValuePairs.add(new BasicNameValuePair("description", desc));
// Nu de punten van de polygoon ophalen en die bijvoegen
Cursor points = db.getAllPolygonPoints(polygonid);
if (!points.moveToFirst()) {
// Hier klopt iets niet, de polygoon heeft geen punten!
db.removePolygon(polygonid, true);
return;
}
do {
nameValuePairs.add(
new BasicNameValuePair(
"points[]",
points.getString(0) + "," + points.getString(1) + "," + points.getString(2)));
} while (points.moveToNext());
try {
httpp.addHeader(new BasicScheme().authenticate(creds, httpp));
httpp.setEntity(new UrlEncodedFormEntity(nameValuePairs));
} catch (AuthenticationException e1) {
Log.e(Mapp.TAG, e1.getMessage());
throw new SyncException("Authentication failed");
} catch (UnsupportedEncodingException e) {
Log.e(Mapp.TAG, e.getMessage());
throw new SyncException("Failed to encode data");
}
HttpResponse response;
try {
response = httpclient.execute(httpp);
if (response.getStatusLine().getStatusCode() == 418) {
throw new SyncException("Unable to synchronize because the server is a teapot.");
} else if (response.getStatusLine().getStatusCode() == 401) {
throw new SyncException("Not authorized");
} else if (response.getStatusLine().getStatusCode() != 200) {
// Er is iets mis gegaan.
// Lees het resultaat van de actie in
JSONObject result = null;
InputStream is = response.getEntity().getContent();
BufferedReader r = new BufferedReader(new InputStreamReader(is));
StringBuilder total = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
total.append(line);
}
result = new JSONObject(total.toString());
Log.e(Mapp.TAG, "Sync error: " + result.getString("message"));
throw new SyncException(result.getString("message"));
} else {
db.setPolygonIsSynced(polygonid);
}
} catch (ClientProtocolException e) {
Log.e(Mapp.TAG, e.getMessage());
throw new SyncException("Epic HTTP failure");
} catch (IOException e) {
Log.e(Mapp.TAG, e.getMessage());
throw new SyncException("Exception during server synchronisation");
} catch (JSONException e) {
Log.e(Mapp.TAG, "Sync failed. Response is no valid JSON or expected variable not found.");
throw new SyncException("Invalid server response");
}
} while (c.moveToNext());
}
