D246.1783826764.diff
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	diff --git a/app/src/main/java/it/reyboz/bustorino/ActivityPrincipal.java b/app/src/main/java/it/reyboz/bustorino/ActivityPrincipal.java
	--- a/app/src/main/java/it/reyboz/bustorino/ActivityPrincipal.java
	+++ b/app/src/main/java/it/reyboz/bustorino/ActivityPrincipal.java
	@@ -49,6 +49,8 @@

	import java.util.Arrays;
	import java.util.Map;
	+import java.util.concurrent.LinkedBlockingDeque;
	+import java.util.function.Consumer;

	import it.reyboz.bustorino.backend.Stop;
	import it.reyboz.bustorino.data.DBUpdateCheckWorker;
	@@ -70,11 +72,8 @@
	private final static String TAG_FAVORITES="favorites_frag";
	private Snackbar snackbar;

	- private boolean showingMainFragmentFromOther = false;
	- private boolean onCreateComplete = false;
	-
	private ServiceAlertsViewModel serviceAlertsViewModel;
	- private FragmentKind showingFragmentKind;
	+ //private FragmentKind showingFragmentKind;

	private final Map<Integer, Runnable> menuActions = Map.of(
	R.id.drawer_action_settings, () -> {
	@@ -85,8 +84,7 @@
	R.id.nav_favorites_item, () ->
	checkAndShowFavoritesFragment(getSupportFragmentManager(), true),

	- R.id.nav_home, () ->
	- showHomeMainFragmentFromClick(true),
	+ R.id.nav_home, this::showHomeMainFragmentFromClick,

	R.id.nav_map_item, () ->
	requestMapFragment(true),
	@@ -99,6 +97,7 @@
	R.id.nav_nearby, this::openNearbyStopsFragment
	);

	+
	private long lastClosingAttempt = -1L;
	private final OnBackPressedCallback backPressedCallback = new OnBackPressedCallback(false) {
	@Override
	@@ -117,7 +116,6 @@
	}
	};

	-
	@Override
	protected void onCreate(@Nullable Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	@@ -279,10 +277,10 @@
	case "favorites" -> checkAndShowFavoritesFragment(framan, false);
	case "lines" -> showLinesFragment(framan, false, null);
	case "nearby" -> createShowMainFragment(framan, MainScreenFragment.makeArgsNearby(), false);
	- default -> showHomeMainFragmentFromClick(false);
	+ default -> createShowMainFragment(framan, MainScreenFragment.makeArgsButtonsScreen(), false);
	}
	}
	- onCreateComplete = true;
	+ //boolean onCreateComplete = true;

	//last but not least, set the good default values
	checkApplyDefaultSettingsValues();
	@@ -475,20 +473,30 @@
	*/

	private boolean activityCustomBackPressed(){
	- boolean resolved = true;
	var mainFragManager = getSupportFragmentManager();
	+ boolean resolved = mainFragManager.getBackStackEntryCount() > 0;
	+
	Fragment shownFrag = mainFragManager.findFragmentById(R.id.mainActContentFrame);
	- if (mDrawer.isDrawerOpen(GravityCompat.START))
	+ if (mDrawer.isDrawerOpen(GravityCompat.START)) {
	mDrawer.closeDrawer(GravityCompat.START);
	- else if(shownFrag != null && shownFrag.isVisible() && shownFrag.getChildFragmentManager().getBackStackEntryCount() > 0){
	- if(shownFrag instanceof MainScreenFragment){
	- //we have to stop the arrivals reload
	- ((MainScreenFragment) shownFrag).cancelReloadArrivalsIfNeeded();
	+ resolved = true;
	+ }
	+ else if (shownFrag instanceof MainScreenFragment mainFrag) { //the only case when we have to pop both stacks
	+ mainFrag.cancelReloadArrivalsIfNeeded();
	+
	+ var chManager = mainFrag.getChildFragmentManager();
	+
	+ if(chManager.getBackStackEntryCount() > 0){
	+ chManager.popBackStack();
	+ Log.d(DEBUG_TAG, "Child back stack popped");
	+ resolved = true;
	+ } else{
	+ Log.d(DEBUG_TAG, "No back stack on child fragment manager");
	}
	- shownFrag.getChildFragmentManager().popBackStack();
	- if(showingMainFragmentFromOther && mainFragManager.getBackStackEntryCount() > 0){
	- getSupportFragmentManager().popBackStack();
	- Log.d(DEBUG_TAG, "Popping main back stack also");
	+ boolean haveToPopMainFromFragment = mainFrag.needToPopMainStackOnBack();
	+ //mainFrag.getChildFragmentManager().popBackStack();
	+ if(haveToPopMainFromFragment){ // pops the stack
	+ mainFragManager.popBackStack();
	}
	}
	else if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
	@@ -533,9 +541,11 @@
	Log.e(DEBUG_TAG, "Asked to show the snackbar but the baseView is null");
	}
	}
	+ /*
	private void updateShowingFragmentKindInternal(@NonNull FragmentKind newKind){
	if(BuildConfig.DEBUG)
	Log.d(DEBUG_TAG, "Updating fragment kind, new: "+newKind+", current: "+showingFragmentKind);
	+ boolean showingMainFragmentFromOther = false;
	if(showingFragmentKind == null){
	showingFragmentKind = newKind;
	showingMainFragmentFromOther = false;
	@@ -546,6 +556,8 @@
	}
	}

	+ */
	+
	/**
	* Show the actual fragment by adding it to the backstack
	* @param fraMan the fragmentManager
	@@ -562,7 +574,9 @@
	R.anim.slide_out // popExit
	)*/
	.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
	- if (addToBackStack) ft.addToBackStack(null);
	+ if (addToBackStack) {
	+ ft.addToBackStack(null);
	+ }
	ft.commit();
	}
	/**
	@@ -571,7 +585,6 @@
	* @param arguments args for the fragment
	*/
	private static void createShowMainFragment(FragmentManager fraMan,@Nullable Bundle arguments, boolean addToBackStack){
	- //var frag = MainScreenFragment.newInstance();
	FragmentTransaction ft = fraMan.beginTransaction()
	.replace(R.id.mainActContentFrame, MainScreenFragment.class, arguments, MainScreenFragment.FRAGMENT_TAG)
	.setReorderingAllowed(false)
	@@ -585,34 +598,18 @@
	if (addToBackStack) ft.addToBackStack(null);
	ft.commit();
	}
	- private void showMainFragmentFromClick(@Nullable Bundle argsToCreate, boolean addToBackStack){
	- FragmentManager fraMan = getSupportFragmentManager();
	- Fragment fragment = fraMan.findFragmentByTag(MainScreenFragment.FRAGMENT_TAG);
	- final MainScreenFragment mainScreenFragment;
	- if (fragment==null \| !(fragment instanceof MainScreenFragment)){
	- createShowMainFragment(fraMan, argsToCreate, addToBackStack);
	- }
	- else if(!fragment.isVisible()){
	-

	- mainScreenFragment = (MainScreenFragment) fragment;
	- showMainFragment(fraMan, mainScreenFragment, addToBackStack);
	- Log.d(DEBUG_TAG, "Found the main fragment");
	- } else{
	- mainScreenFragment = (MainScreenFragment) fragment;
	- }
	- }
	-
	- private void showHomeMainFragmentFromClick(boolean addToBackStack){
	+ private void showHomeMainFragmentFromClick(){
	FragmentManager fraMan = getSupportFragmentManager();
	var fragment = fraMan.findFragmentByTag(MainScreenFragment.FRAGMENT_TAG);
	if(fragment instanceof MainScreenFragment mainFrag){
	+ var visible = mainFrag.isVisible();
	if(!mainFrag.isVisible()){
	- showMainFragment(fraMan, mainFrag, addToBackStack);
	+ showMainFragment(fraMan, mainFrag, true);
	}
	- mainFrag.showButtonsFragmentIfNotNearby(addToBackStack);
	+ mainFrag.showButtonsFragmentIfNotNearby(true);
	} else{
	- createShowMainFragment(fraMan, MainScreenFragment.makeArgsButtonsScreen(), addToBackStack);
	+ createShowMainFragment(fraMan, MainScreenFragment.makeArgsButtonsScreen(), true);
	}
	}

	@@ -714,11 +711,8 @@

	@Override
	public void readyGUIfor(FragmentKind fragmentType) {
	- MainScreenFragment mainFragmentIfVisible = getMainFragmentIfVisible();
	- if (mainFragmentIfVisible!=null){
	- mainFragmentIfVisible.readyGUIfor(fragmentType);
	- }
	- updateShowingFragmentKindInternal(fragmentType);
	+ //updateShowingFragmentKindInternal(fragmentType);
	+ if(BuildConfig.DEBUG) Log.d(DEBUG_TAG, "readyGUIfor fragment kind: " + fragmentType);

	Integer titleResId = null;
	switch (fragmentType){
	@@ -758,38 +752,24 @@
	}
	if(getSupportActionBar()!=null && titleResId!=null)
	getSupportActionBar().setTitle(titleResId);
	+ MainScreenFragment mainFragmentIfVisible = getMainFragmentIfVisible();
	+ if (mainFragmentIfVisible!=null){
	+ mainFragmentIfVisible.readyGUIfor(fragmentType);
	+ }
	}

	@Override
	public void requestArrivalsForStopID(String ID) {
	- //register if the request came from the main fragment or not
	- MainScreenFragment probableFragment = getMainFragmentIfVisible();
	-
	- // this has some contorted logic, but it works
	- if (probableFragment == null){
	- FragmentManager fraMan = getSupportFragmentManager();
	- Fragment fragment = fraMan.findFragmentByTag(MainScreenFragment.FRAGMENT_TAG);
	- Log.d(DEBUG_TAG, "Requested main fragment, not visible. Search by TAG returned: "+fragment);
	- if(fragment!=null){
	- //the fragment is there but not shown
	- probableFragment = (MainScreenFragment) fragment;
	- // set the flag
	- probableFragment.setSuppressArrivalsReload(true);
	- showMainFragment(fraMan, probableFragment, true);
	- probableFragment.requestArrivalsForStopID(ID);
	- } else {
	- // we have no fragment
	- //if onCreate is complete, then we are not asking for the first showing fragment
	- final Bundle args = MainScreenFragment.makeArgsArrivals(ID);
	- boolean addtobackstack = onCreateComplete;
	- createShowMainFragment(fraMan, args ,addtobackstack);
	- }
	- } else {
	- //the MainScreeFragment is shown, nothing to do
	- probableFragment.requestArrivalsForStopID(ID);
	+ Consumer<MainScreenFragment> consumer = fragment -> {
	+ fragment.setSuppressArrivalsReload(true);
	+ fragment.requestArrivalsForStopID(ID);
	+ };
	+ boolean done = getMainFragmentAndDoStuff(consumer);
	+ if(!done){
	+ //create the fragment
	+ final Bundle args = MainScreenFragment.makeArgsArrivals(ID);
	+ createShowMainFragment(getSupportFragmentManager(), args ,true);
	}
	-
	- mNavView.setCheckedItem(R.id.nav_home);
	}
	@Override
	public void openLineFromStop(String routeGtfsId, @Nullable String stopIDFrom){
	@@ -802,6 +782,23 @@

	}

	+ private boolean getMainFragmentAndDoStuff(Consumer<MainScreenFragment> consumer){
	+ FragmentManager fraMan = getSupportFragmentManager();
	+ var frag = fraMan.findFragmentByTag(MainScreenFragment.FRAGMENT_TAG);
	+ if( frag instanceof MainScreenFragment mainFrag){
	+ if(!mainFrag.isVisible()) {
	+ showMainFragment(fraMan, mainFrag, true);
	+ mainFrag.setMainFragmentManagerTransition(true);
	+ } else{
	+ mainFrag.setMainFragmentManagerTransition(false);
	+ }
	+ consumer.accept(mainFrag);
	+ return true;
	+ } else{
	+ return false;
	+ }
	+ }
	+
	@Override
	public void openLineFromVehicle(String routeGtfsId, @Nullable String optionalPatternId, @Nullable Bundle args) {

	@@ -814,17 +811,9 @@

	@Override
	public void openNearbyStopsFragment() {
	- FragmentManager fraMan = getSupportFragmentManager();
	- var fragment = fraMan.findFragmentByTag(MainScreenFragment.FRAGMENT_TAG);
	- if(fragment instanceof MainScreenFragment mainFrag){
	- if(!mainFrag.isVisible()){
	- showMainFragment(fraMan, mainFrag, true);
	- }
	- mainFrag.openNearbyStopsFragment();
	- } else{
	- // there is no fragment and it is not visible
	- // add to back stack the main fragment, as the NearbyStopsFragment will not be added
	- createShowMainFragment(fraMan, MainScreenFragment.makeArgsNearby(), true);
	+ boolean done = getMainFragmentAndDoStuff(MainScreenFragment::openNearbyStopsFragment);
	+ if(!done){
	+ createShowMainFragment(getSupportFragmentManager(), MainScreenFragment.makeArgsNearby(), true);
	}
	}

	diff --git a/app/src/main/java/it/reyboz/bustorino/adapters/ArrivalsStopAdapter.java b/app/src/main/java/it/reyboz/bustorino/adapters/ArrivalsStopAdapter.java
	--- a/app/src/main/java/it/reyboz/bustorino/adapters/ArrivalsStopAdapter.java
	+++ b/app/src/main/java/it/reyboz/bustorino/adapters/ArrivalsStopAdapter.java
	@@ -24,6 +24,7 @@
	import androidx.annotation.Nullable;
	import androidx.core.util.Pair;
	import androidx.preference.PreferenceManager;
	+import androidx.recyclerview.widget.DiffUtil;
	import androidx.recyclerview.widget.RecyclerView;
	import android.util.Log;
	import android.view.LayoutInflater;
	@@ -34,8 +35,6 @@
	import it.reyboz.bustorino.R;
	import it.reyboz.bustorino.backend.*;
	import it.reyboz.bustorino.fragments.FragmentListenerMain;
	-import it.reyboz.bustorino.util.RoutePositionSorter;
	-import it.reyboz.bustorino.util.StopSorterByDistance;

	import java.util.*;

	@@ -44,15 +43,15 @@
	//private List<Stop> stops;
	private @NonNull GPSPoint userPosition;
	private FragmentListenerMain listener;
	- private List< Pair<Stop, Route> > routesPairList;
	+ private List< RouteWithStop > routesPairList;
	private final Context context;
	//Maximum number of stops to keep
	private final int MAX_STOPS = 20; //TODO: make it programmable
	- private String KEY_CAPITALIZE;
	+ private final String KEY_CAPITALIZE;
	private NameCapitalize capit;


	- public ArrivalsStopAdapter(@Nullable List< Pair<Stop, Route> > routesPairList, FragmentListenerMain fragmentListener, Context con, @NonNull GPSPoint pos) {
	+ public ArrivalsStopAdapter(@Nullable List< RouteWithStop > routesPairList, FragmentListenerMain fragmentListener, Context con, @NonNull GPSPoint pos) {
	listener = fragmentListener;
	userPosition = pos;
	this.routesPairList = routesPairList;
	@@ -81,10 +80,10 @@
	public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
	//DO THE ACTUAL WORK TO PUT THE DATA
	if(routesPairList==null \|\| routesPairList.size() == 0) return; //NO STOPS
	- final Pair<Stop,Route> stopRoutePair = routesPairList.get(position);
	- if(stopRoutePair!=null && stopRoutePair.first!=null){
	- final Stop stop = stopRoutePair.first;
	- final Route r = stopRoutePair.second;
	+ final var stopRoutePair = routesPairList.get(position);
	+ if(stopRoutePair != null){
	+ final Stop stop = stopRoutePair.getStop();
	+ final Route r = stopRoutePair.getRoute();
	final Double distance = stop.getDistanceFromLocation(userPosition.getLatitude(), userPosition.longitude);
	if(distance!=Double.POSITIVE_INFINITY){
	holder.distancetextView.setText(distance.intValue()+" m");
	@@ -165,7 +164,7 @@
	}

	}
	-
	+ /*
	public void resetRoutesPairList(List<Palina> stopList){
	Collections.sort(stopList,new StopSorterByDistance(userPosition));

	@@ -181,59 +180,96 @@
	}
	}

	- public void setUserPosition(@Nullable GPSPoint userPosition) {
	- this.userPosition = userPosition;
	+ */
	+
	+ public void updatePosition(@NonNull GPSPoint pos){
	+ userPosition = pos;
	}

	- public void setRoutesPairListAndPosition(List<Pair<Stop, Route>> mRoutesPairList, @Nullable GPSPoint pos) {
	- if(pos!=null){
	- this.userPosition = pos;
	+ public void setRoutesPairListAndPosition(@NonNull List<RouteWithStop> newList, @Nullable GPSPoint pos) {
	+ if(pos!=null) updatePosition(pos);
	+
	+ if (routesPairList == null) {
	+ routesPairList = new ArrayList<>(newList);
	+ notifyItemRangeInserted(0, newList.size());
	+ return;
	}
	- if(mRoutesPairList!=null){
	- //this.routesPairList = routesPairList;
	- //remove duplicates
	- sortAndRemoveDuplicates(mRoutesPairList, this.userPosition);
	- //routesPairList = mRoutesPairList;
	- //STUPID CODE
	- if (this.routesPairList == null \|\| routesPairList.size() == 0){
	- routesPairList = mRoutesPairList;
	- notifyDataSetChanged();
	- } else{
	-
	- final HashMap<Pair<String,String>, Integer> indexMapIn = getRouteIndexMap(mRoutesPairList);
	- final HashMap<Pair<String,String>, Integer> indexMapExisting = getRouteIndexMap(routesPairList);
	- //List<Pair<Stop,Route>> oldList = routesPairList;
	- routesPairList = mRoutesPairList;
	- /*
	- for (Pair<String,String> pair: indexMapIn.keySet()){
	- final Integer posIn = indexMapIn.get(pair);
	- if (posIn == null) continue;
	- if (indexMapExisting.containsKey(pair)){
	- final Integer posExisting = indexMapExisting.get(pair);
	- //THERE IS ALREADY
	- //routesPairList.remove(posExisting.intValue());
	- //routesPairList.add(posIn,mRoutesPairList.get(posIn));
	-
	- notifyItemMoved(posExisting, posIn);
	- indexMapExisting.remove(pair);
	- } else{
	- //INSERT IT
	- //routesPairList.add(posIn,mRoutesPairList.get(posIn));
	- notifyItemInserted(posIn);
	+
	+ DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new DiffUtil.Callback() {
	+ @Override
	+ public int getOldListSize() {
	+ return routesPairList.size();
	+ }
	+
	+ @Override
	+ public int getNewListSize() {
	+ return newList.size();
	}
	- }//
	- //REMOVE OLD STOPS
	- for (Pair<String,String> pair: indexMapExisting.keySet()) {
	+
	+ @Override
	+ public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
	+
	+ RouteWithStop oldItem = routesPairList.get(oldItemPosition);
	+ RouteWithStop newItem = newList.get(newItemPosition);
	+
	+ // usa un ID univoco
	+ return oldItem.getId().equals(newItem.getId());
	+ }
	+
	+ @Override
	+ public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
	+
	+ RouteWithStop oldItem = routesPairList.get(oldItemPosition);
	+ RouteWithStop newItem = newList.get(newItemPosition);
	+
	+ // confronta il contenuto
	+ return oldItem.equals(newItem);
	+ }
	+ }
	+ );
	+
	+ routesPairList.clear();
	+ routesPairList.addAll(newList);
	+
	+ diffResult.dispatchUpdatesTo(this);
	+
	+
	+ /*if (this.routesPairList == null \|\| routesPairList.size() == 0){
	+ routesPairList = mRoutesPairList;
	+ notifyDataSetChanged();
	+ } else{
	+
	+ final var indexMapIn = getRouteIndexMap(mRoutesPairList);
	+ final var indexMapExisting = getRouteIndexMap(routesPairList);
	+ //List<Pair<Stop,Route>> oldList = routesPairList;
	+ routesPairList = mRoutesPairList;
	+ /*
	+ for (Pair<String,String> pair: indexMapIn.keySet()){
	+ final Integer posIn = indexMapIn.get(pair);
	+ if (posIn == null) continue;
	+ if (indexMapExisting.containsKey(pair)){
	final Integer posExisting = indexMapExisting.get(pair);
	- if (posExisting == null) continue;
	+ //THERE IS ALREADY
	//routesPairList.remove(posExisting.intValue());
	- notifyItemRemoved(posExisting);
	+ //routesPairList.add(posIn,mRoutesPairList.get(posIn));
	+
	+ notifyItemMoved(posExisting, posIn);
	+ indexMapExisting.remove(pair);
	+ } else{
	+ //INSERT IT
	+ //routesPairList.add(posIn,mRoutesPairList.get(posIn));
	+ notifyItemInserted(posIn);
	}
	- //*/notifyDataSetChanged();
	-
	+ }//
	+ //REMOVE OLD STOPS
	+ for (Pair<String,String> pair: indexMapExisting.keySet()) {
	+ final Integer posExisting = indexMapExisting.get(pair);
	+ if (posExisting == null) continue;
	+ //routesPairList.remove(posExisting.intValue());
	+ notifyItemRemoved(posExisting);
	}
	- //remove and join the
	- }
	+
	+ */

	}

	@@ -241,52 +277,27 @@
	* Sort and remove the repetitions for the routesPairList
	*/
	private void resetListAndPosition(){
	- Collections.sort(this.routesPairList,new RoutePositionSorter(userPosition));
	- //All of this to get only the first occurrences of a line (name & direction)
	- ListIterator<Pair<Stop,Route>> iterator = routesPairList.listIterator();
	- Set<Pair<String,String>> allRoutesDirections = new HashSet<>();
	- while(iterator.hasNext()){
	- final Pair<Stop,Route> stopRoutePair = iterator.next();
	- if (stopRoutePair.second != null) {
	- final Pair<String, String> routeNameDirection = new Pair<>(stopRoutePair.second.getName(), stopRoutePair.second.destinazione);
	- if (allRoutesDirections.contains(routeNameDirection)) {
	- iterator.remove();
	- } else {
	- allRoutesDirections.add(routeNameDirection);
	- }
	- }
	- }
	- }
	- /**
	- * Sort and remove the repetitions in the list
	- */
	- private static void sortAndRemoveDuplicates(List< Pair<Stop, Route> > routesPairList, GPSPoint positionToSort ){
	- Collections.sort(routesPairList,new RoutePositionSorter(positionToSort));
	+ //Collections.sort(this.routesPairList,new RoutePositionSorter(userPosition));
	//All of this to get only the first occurrences of a line (name & direction)
	- ListIterator<Pair<Stop,Route>> iterator = routesPairList.listIterator();
	+ var iterator = routesPairList.listIterator();
	Set<Pair<String,String>> allRoutesDirections = new HashSet<>();
	while(iterator.hasNext()){
	- final Pair<Stop,Route> stopRoutePair = iterator.next();
	- if (stopRoutePair.second != null) {
	- final Pair<String, String> routeNameDirection = new Pair<>(stopRoutePair.second.getName(), stopRoutePair.second.destinazione);
	- if (allRoutesDirections.contains(routeNameDirection)) {
	- iterator.remove();
	- } else {
	- allRoutesDirections.add(routeNameDirection);
	- }
	+ final var stopRoutePair = iterator.next();
	+ stopRoutePair.getRoute();
	+ final Pair<String, String> routeNameDirection = new Pair<>(stopRoutePair.getRoute().getName(), stopRoutePair.getRoute().destinazione);
	+ if (allRoutesDirections.contains(routeNameDirection)) {
	+ iterator.remove();
	+ } else {
	+ allRoutesDirections.add(routeNameDirection);
	}
	}
	}

	- private static HashMap<Pair<String, String>, Integer> getRouteIndexMap(List<Pair<Stop, Route>> routesPairList){
	- final HashMap<Pair<String, String>, Integer> myMap = new HashMap<>();
	+
	+ private static HashMap<RouteWithStop, Integer> getRouteIndexMap(List<RouteWithStop> routesPairList){
	+ final HashMap<RouteWithStop, Integer> myMap = new HashMap<>();
	for (int i=0; i<routesPairList.size(); i++){
	- final Route r = routesPairList.get(i).second;
	- if (r==null) continue;
	- final String name = r.getName();
	- final String destination = r.destinazione;
	- if (name!= null && destination!=null)
	- myMap.put(new Pair<>(name.toLowerCase(Locale.ROOT).trim(),destination.toLowerCase(Locale.ROOT).trim()), i);
	+ myMap.put(routesPairList.get(i), i);
	}
	return myMap;
	}
	diff --git a/app/src/main/java/it/reyboz/bustorino/adapters/SquareStopAdapter.java b/app/src/main/java/it/reyboz/bustorino/adapters/SquareStopAdapter.java
	--- a/app/src/main/java/it/reyboz/bustorino/adapters/SquareStopAdapter.java
	+++ b/app/src/main/java/it/reyboz/bustorino/adapters/SquareStopAdapter.java
	@@ -19,6 +19,7 @@

	import android.location.Location;
	import androidx.annotation.Nullable;
	+import androidx.recyclerview.widget.DiffUtil;
	import androidx.recyclerview.widget.RecyclerView;
	import android.util.Log;
	import android.view.LayoutInflater;
	@@ -27,6 +28,7 @@
	import android.widget.TextView;
	import it.reyboz.bustorino.R;
	import it.reyboz.bustorino.backend.GPSPoint;
	+import it.reyboz.bustorino.backend.RouteWithStop;
	import it.reyboz.bustorino.backend.Stop;
	import it.reyboz.bustorino.util.StopSorterByDistance;
	import it.reyboz.bustorino.fragments.FragmentListenerMain;
	@@ -113,8 +115,36 @@

	}

	- public void setStops(List<Stop> stops) {
	- this.stops = stops;
	+ public void setStops(List<Stop> newStops) {
	+ // this.stops = stops;
	+ DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new DiffUtil.Callback() {
	+ @Override
	+ public int getOldListSize() {
	+ return stops.size();
	+ }
	+ @Override
	+ public int getNewListSize() {
	+ return newStops.size();
	+ }
	+ @Override
	+ public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
	+ var oldItem = stops.get(oldItemPosition);
	+ var newItem = newStops.get(newItemPosition);
	+
	+ // usa un ID univoco
	+ return oldItem.ID.equals(newItem.ID);
	+ }
	+
	+ @Override
	+ public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
	+ var oldItem = stops.get(oldItemPosition);
	+ var newItem = newStops.get(newItemPosition);
	+ return oldItem.equals(newItem);
	+ }
	+ });
	+ this.stops.clear();
	+ this.stops.addAll(newStops);
	+ diffResult.dispatchUpdatesTo(this);
	}

	public void setUserPosition(@Nullable GPSPoint userPosition) {
	diff --git a/app/src/main/java/it/reyboz/bustorino/backend/FiveTNormalizer.java b/app/src/main/java/it/reyboz/bustorino/backend/FiveTNormalizer.java
	--- a/app/src/main/java/it/reyboz/bustorino/backend/FiveTNormalizer.java
	+++ b/app/src/main/java/it/reyboz/bustorino/backend/FiveTNormalizer.java
	@@ -19,6 +19,7 @@
	package it.reyboz.bustorino.backend;

	import android.util.Log;
	+import androidx.annotation.NonNull;

	/**
	* Converts some weird stop IDs found on the 5T website to the form used everywhere else (including GTT website).
	@@ -254,6 +255,7 @@
	return null;
	}
	}
	+ @NonNull
	public static String fixShortNameForDisplay(String routeID, boolean withBarratoSpace) {
	/*if (routeID.length() == 3 && routeID.charAt(2) == 'B') {
	return routeID.substring(0, 2).concat("/");
	diff --git a/app/src/main/java/it/reyboz/bustorino/backend/RouteWithStop.kt b/app/src/main/java/it/reyboz/bustorino/backend/RouteWithStop.kt
	new file mode 100644
	--- /dev/null
	+++ b/app/src/main/java/it/reyboz/bustorino/backend/RouteWithStop.kt
	@@ -0,0 +1,10 @@
	+package it.reyboz.bustorino.backend
	+
	+data class RouteWithStop(
	+ val stop: Stop,
	+ val route: Route,
	+) {
	+ val id by lazy {
	+ "stop${stop.ID}route${route.displayCode}"
	+ }
	+}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/FragmentHelper.java b/app/src/main/java/it/reyboz/bustorino/fragments/FragmentHelper.java
	--- a/app/src/main/java/it/reyboz/bustorino/fragments/FragmentHelper.java
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/FragmentHelper.java
	@@ -35,13 +35,14 @@

	import java.lang.ref.WeakReference;
	import java.util.List;
	+import java.util.concurrent.LinkedBlockingDeque;

	/**
	* Helper class to manage the fragments and their needs
	*/
	public class FragmentHelper {
	//GeneralActivity act;
	- private final FragmentListenerMain listenerMain;
	+ private final FragmentListenerMain mainFragment;
	private final WeakReference<FragmentManager> managerWeakRef;
	private Stop lastSuccessfullySearchedBusStop;
	//support for multiple frames
	@@ -52,13 +53,16 @@
	private static final String DEBUG_TAG = "BusTO FragmHelper";
	private final StopSearcher stopSearcher;

	+ //this is for deciding whether to popMain Fragment stack with children
	+ private final LinkedBlockingDeque<Boolean> popMainQueueOnMainFragStack = new LinkedBlockingDeque<>();
	+

	public FragmentHelper(FragmentListenerMain listener, FragmentManager framan, Context context, int mainFrame) {
	this(listener,framan, context,mainFrame,NO_FRAME);
	}

	public FragmentHelper(FragmentListenerMain listener, FragmentManager fraMan, Context context, int primaryFrameLayout, int secondaryFrameLayout) {
	- this.listenerMain = listener;
	+ this.mainFragment = listener;
	this.managerWeakRef = new WeakReference<>(fraMan);
	this.primaryFrameLayout = primaryFrameLayout;
	this.secondaryFrameLayout = secondaryFrameLayout;
	@@ -79,7 +83,16 @@
	this.lastSuccessfullySearchedBusStop = stop;
	}

	-
	+ public boolean needToPopMainStackOnBack(){
	+ if(popMainQueueOnMainFragStack.isEmpty()){
	+ return true;
	+ }
	+ return popMainQueueOnMainFragStack.pop();
	+ }
	+ public void setMainFragmentManagerTransition(boolean popMain){
	+ Log.d(DEBUG_TAG, "Adding child fragment pop for main screen: " + popMain);
	+ popMainQueueOnMainFragStack.addFirst(popMain);
	+ }
	/**
	* Called when you need to create a fragment for a specified Palina
	* @param p the Stop that needs to be displayed
	@@ -124,7 +137,7 @@
	// enable fragment auto refresh
	arrivalsFragment.setReloadOnResume(true);

	- listenerMain.hideKeyboard();
	+ mainFragment.hideKeyboard();
	toggleSpinner(false);
	}

	@@ -134,7 +147,7 @@
	* @param query String queried
	*/
	public void createStopListFragment(List<Stop> resultList, String query, boolean addToBackStack){
	- listenerMain.hideKeyboard();
	+ mainFragment.hideKeyboard();
	StopListFragment listfragment = StopListFragment.newInstance(query);
	if(managerWeakRef.get()==null) {
	//SOMETHING WENT VERY WRONG
	@@ -143,6 +156,8 @@
	}
	attachFragmentToContainer(managerWeakRef.get(),
	listfragment, "search_"+query, false, addToBackStack);
	+ //DO NOT DO THE SAME ON THE ARRIVALS (the call goes through MainActivity)
	+ setMainFragmentManagerTransition(false);
	listfragment.setStopList(resultList);
	//listenerMain.readyGUIfor(FragmentKind.STOPS);
	toggleSpinner(false);
	@@ -154,7 +169,7 @@
	* @param on new status of spinner system
	*/
	public void toggleSpinner(boolean on){
	- listenerMain.toggleSpinner(on);
	+ mainFragment.toggleSpinner(on);
	}

	/**
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/LinesGridShowingFragment.kt b/app/src/main/java/it/reyboz/bustorino/fragments/LinesGridShowingFragment.kt
	--- a/app/src/main/java/it/reyboz/bustorino/fragments/LinesGridShowingFragment.kt
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/LinesGridShowingFragment.kt
	@@ -90,7 +90,8 @@
	}

	private val routeClickListener = RouteAdapter.ItemClicker {
	- fragmentListener.openLineFromStop(it.gtfsId, null)
	+ //fragmentListener.openLineFromStop(it.gtfsId, null)
	+ openLine(it)
	}
	private val arrows = HashMap<String, ImageView>()
	private val durations = HashMap<String, Long>()
	@@ -223,6 +224,10 @@
	viewModel.setLineQuery(textSearch)
	}

	+ fun openLine(route: GtfsRoute){
	+ fragmentListener.openLineFromStop(route.gtfsId, null)
	+ }
	+
	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
	super.onViewCreated(view, savedInstanceState)
	val menuHost: MenuHost = requireActivity()
	@@ -232,7 +237,8 @@
	//create new item click listener every time
	val adapter = RouteOnlyLineAdapter(routesNames){ pos, _ ->
	val r = routes[pos]
	- fragmentListener.openLineFromStop(r.gtfsId, null)
	+ //fragmentListener.openLineFromStop(r.gtfsId, null)
	+ openLine(r)
	}
	favoritesRecyclerView.adapter = adapter
	}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/MainScreenFragment.java b/app/src/main/java/it/reyboz/bustorino/fragments/MainScreenFragment.java
	--- a/app/src/main/java/it/reyboz/bustorino/fragments/MainScreenFragment.java
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/MainScreenFragment.java
	@@ -49,8 +49,10 @@
	import com.google.android.material.floatingactionbutton.FloatingActionButton;

	import java.util.Map;
	+import java.util.concurrent.LinkedBlockingDeque;
	import java.util.concurrent.LinkedBlockingQueue;

	+import it.reyboz.bustorino.BuildConfig;
	import it.reyboz.bustorino.R;
	import it.reyboz.bustorino.backend.*;
	import it.reyboz.bustorino.util.Permissions;
	@@ -65,7 +67,7 @@
	* Use the {@link MainScreenFragment#newInstance} factory method to
	* create an instance of this fragment.
	*/
	-public class MainScreenFragment extends BarcodeFragment implements FragmentListenerMain{
	+public class MainScreenFragment extends BarcodeFragment implements FragmentListenerMain, ParentFragmentManagerFromChild{


	private static final String SAVED_FRAGMENT="saved_fragment";
	@@ -140,7 +142,8 @@
	private CoordinatorLayout coordLayout;

	//this is really a hackish thing, but it works
	- private LinkedBlockingQueue<Runnable> thingsToDoOnStart = new LinkedBlockingQueue<>();
	+ private final LinkedBlockingQueue<Runnable> thingsToDoOnStart = new LinkedBlockingQueue<>();
	+

	private void refreshStop() {
	if(getContext() == null){
	@@ -243,7 +246,6 @@
	}


	-
	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	@@ -261,6 +263,18 @@
	pendingSearchQuery = args.getString(ARG_SEARCH_QUERY);
	}

	+ fragmentHelper = new FragmentHelper(this, getChildFragmentManager(), getContext(), R.id.resultFrame);
	+
	+ }
	+
	+ @Override
	+ public boolean needToPopMainStackOnBack() {
	+ return fragmentHelper.needToPopMainStackOnBack();
	+ }
	+
	+ @Override
	+ public void setMainFragmentManagerTransition(boolean yes) {
	+ fragmentHelper.setMainFragmentManagerTransition(yes);
	}

	@Override
	@@ -325,8 +339,6 @@
	childFragMan = getChildFragmentManager();
	childFragMan.addOnBackStackChangedListener(() -> Log.d("BusTO Main Fragment", "BACK STACK CHANGED"));

	- fragmentHelper = new FragmentHelper(this, getChildFragmentManager(), getContext(), R.id.resultFrame);
	-
	/*
	cr.setAccuracy(Criteria.ACCURACY_FINE);
	cr.setAltitudeRequired(false);
	@@ -793,8 +805,7 @@
	*/
	@Override
	public void readyGUIfor(FragmentKind fragmentType) {
	-
	-
	+ if(BuildConfig.DEBUG) Log.d(DEBUG_TAG, "Readying main fragment for type "+fragmentType);
	//if we are getting results, already, stop waiting for nearbyStops
	if (fragmentType == FragmentKind.ARRIVALS \|\| fragmentType == FragmentKind.STOPS) {
	hideKeyboard();
	@@ -815,7 +826,7 @@
	prepareGUIForBusStops();
	break;
	default:
	- Log.d(DEBUG_TAG, "Fragment type is unknown");
	+ //Log.d(DEBUG_TAG, "Fragment type is unknown");
	return;
	}
	// Shows hints
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.java b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.java
	deleted file mode 100644
	--- a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.java
	+++ /dev/null
	@@ -1,122 +0,0 @@
	-package it.reyboz.bustorino.fragments;
	-
	-import android.content.Context;
	-import android.util.Log;
	-import com.android.volley.NetworkError;
	-import com.android.volley.ParseError;
	-import com.android.volley.Response;
	-import com.android.volley.VolleyError;
	-import it.reyboz.bustorino.backend.NetworkVolleyManager;
	-import it.reyboz.bustorino.backend.Palina;
	-import it.reyboz.bustorino.backend.Route;
	-import it.reyboz.bustorino.backend.Stop;
	-import it.reyboz.bustorino.backend.mato.MapiArrivalRequest;
	-
	-import java.util.ArrayList;
	-import java.util.Date;
	-import java.util.HashMap;
	-import java.util.List;
	-
	-class NearbyArrivalsDownloader implements Response.Listener<Palina>, Response.ErrorListener {
	- final static String DEBUG_TAG = "BusTO-NearbyArrivDowns";
	- //final Map<String,List<Route>> routesToAdd = new HashMap<>();
	- final ArrayList<Palina> nonEmptyPalinas = new ArrayList<>();
	- final HashMap<String, Boolean> completedRequests = new HashMap<>();
	- final static String REQUEST_TAG = "NearbyArrivals";
	- final NetworkVolleyManager volleyManager;
	- int activeRequestCount = 0, reqErrorCount = 0, reqSuccessCount = 0;
	-
	- final ArrivalsListener listener;
	-
	- NearbyArrivalsDownloader(Context context, ArrivalsListener arrivalsListener) {
	- volleyManager = NetworkVolleyManager.getInstance(context);
	-
	- listener = arrivalsListener;
	- //flatProgressBar.setMax(numreq);
	- }
	-
	- public int requestArrivalsForStops(List<Stop> stops){
	- int MAX_ARRIVAL_STOPS = 35;
	- Date currentDate = new Date();
	- int timeRange = 3600;
	- int departures = 10;
	- int numreq = 0;
	- activeRequestCount = 0;
	- reqErrorCount = 0;
	- reqSuccessCount = 0;
	- nonEmptyPalinas.clear();
	- completedRequests.clear();
	-
	- for (Stop s : stops.subList(0, Math.min(stops.size(), MAX_ARRIVAL_STOPS))) {
	-
	- final MapiArrivalRequest req = new MapiArrivalRequest(s.ID, currentDate, timeRange, departures, this, this);
	- req.setTag(REQUEST_TAG);
	- volleyManager.addToRequestQueue(req);
	- activeRequestCount++;
	- numreq++;
	- completedRequests.put(s.ID, false);
	- }
	- listener.setProgress(reqErrorCount+reqSuccessCount, activeRequestCount);
	- return numreq;
	- }
	-
	- private int totalRequests(){
	- return activeRequestCount + reqSuccessCount + reqErrorCount;
	- }
	-
	-
	- @Override
	- public void onErrorResponse(VolleyError error) {
	- if (error instanceof ParseError) {
	- //TODO
	- Log.w(DEBUG_TAG, "Parsing error for stop request");
	- } else if (error instanceof NetworkError) {
	- String s;
	- if (error.networkResponse != null)
	- s = new String(error.networkResponse.data);
	- else s = "";
	- Log.w(DEBUG_TAG, "Network error: " + s);
	- } else {
	- Log.w(DEBUG_TAG, "Volley Error: " + error.getMessage());
	- }
	- if (error.networkResponse != null) {
	- Log.w(DEBUG_TAG, "Error status code: " + error.networkResponse.statusCode);
	- }
	- //counters
	- activeRequestCount--;
	- reqErrorCount++;
	- //flatProgressBar.setProgress(reqErrorCount + reqSuccessCount);
	- listener.setProgress(reqErrorCount + reqSuccessCount, activeRequestCount);
	- }
	-
	- @Override
	- public void onResponse(Palina palinaResult) {
	- //counter for requests
	- activeRequestCount--;
	- reqSuccessCount++;
	- listener.setProgress(reqErrorCount + reqSuccessCount, activeRequestCount);
	-
	- //add the palina to the successful one
	- if(palinaResult!=null) {
	- final List<Route> routes = palinaResult.queryAllRoutes();
	- if (routes != null && !routes.isEmpty()) {
	- nonEmptyPalinas.add(palinaResult);
	- listener.showCompletedArrivals(nonEmptyPalinas);
	- }
	- }
	- }
	-
	- void cancelAllRequests() {
	- volleyManager.getRequestQueue().cancelAll(REQUEST_TAG);
	- //flatProgressBar.setVisibility(View.GONE);
	- listener.onAllRequestsCancelled();
	- }
	-
	- public interface ArrivalsListener{
	- void setProgress(int completedRequests, int pendingRequests);
	-
	- void onAllRequestsCancelled();
	-
	- void showCompletedArrivals(ArrayList<Palina> completedPalinas);
	- }
	-}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.kt b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.kt
	new file mode 100644
	--- /dev/null
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyArrivalsDownloader.kt
	@@ -0,0 +1,113 @@
	+package it.reyboz.bustorino.fragments
	+
	+import android.content.Context
	+import android.util.Log
	+import com.android.volley.NetworkError
	+import com.android.volley.ParseError
	+import com.android.volley.Response
	+import com.android.volley.VolleyError
	+import it.reyboz.bustorino.backend.NetworkVolleyManager
	+import it.reyboz.bustorino.backend.Palina
	+import it.reyboz.bustorino.backend.Stop
	+import it.reyboz.bustorino.backend.mato.MapiArrivalRequest
	+import java.util.*
	+import kotlin.math.min
	+
	+internal class NearbyArrivalsDownloader(context: Context, val listener: ArrivalsListener) : Response.Listener<Palina>,
	+ Response.ErrorListener {
	+ //final Map<String,List<Route>> routesToAdd = new HashMap<>();
	+ val nonEmptyPalinas = ArrayList<Palina>()
	+ val completedRequests: HashMap<String?, Boolean?> = HashMap<String?, Boolean?>()
	+ val volleyManager: NetworkVolleyManager = NetworkVolleyManager.getInstance(context)
	+ var activeRequestCount: Int = 0
	+ var reqErrorCount: Int = 0
	+ var reqSuccessCount: Int = 0
	+
	+
	+ fun requestArrivalsForStops(stops: List<Stop>): Int {
	+ val currentDate = Date()
	+ val timeRange = 3600
	+ val departures = 10
	+ var numreq = 0
	+ activeRequestCount = 0
	+ reqErrorCount = 0
	+ reqSuccessCount = 0
	+ nonEmptyPalinas.clear()
	+ completedRequests.clear()
	+
	+ for (s in stops.subList(0, min(stops.size, MAX_ARRIVAL_STOPS))) {
	+ val req = MapiArrivalRequest(s.ID, currentDate, timeRange, departures, this, this)
	+ req.setTag(REQUEST_TAG)
	+ volleyManager.addToRequestQueue(req)
	+ activeRequestCount++
	+ numreq++
	+ completedRequests[s.ID] = false
	+ }
	+ listener.setProgress(reqErrorCount + reqSuccessCount, activeRequestCount)
	+ return numreq
	+ }
	+
	+ private fun totalRequests(): Int {
	+ return activeRequestCount + reqSuccessCount + reqErrorCount
	+ }
	+
	+
	+ override fun onErrorResponse(error: VolleyError) {
	+ if (error is ParseError) {
	+ //TODO
	+ Log.w(DEBUG_TAG, "Parsing error for stop request")
	+ } else if (error is NetworkError) {
	+ val s: String?
	+ if (error.networkResponse != null) s = String(error.networkResponse.data)
	+ else s = ""
	+ Log.w(DEBUG_TAG, "Network error: " + s)
	+ } else {
	+ Log.w(DEBUG_TAG, "Volley Error: " + error.message)
	+ }
	+ if (error.networkResponse != null) {
	+ Log.w(DEBUG_TAG, "Error status code: " + error.networkResponse.statusCode)
	+ }
	+ //counters
	+ activeRequestCount--
	+ reqErrorCount++
	+ //flatProgressBar.setProgress(reqErrorCount + reqSuccessCount);
	+ listener.setProgress(reqErrorCount + reqSuccessCount, activeRequestCount)
	+ }
	+
	+ override fun onResponse(palinaResult: Palina?) {
	+ //counter for requests
	+ activeRequestCount--
	+ reqSuccessCount++
	+ listener.setProgress(reqErrorCount + reqSuccessCount, activeRequestCount)
	+
	+ //add the palina to the successful one
	+ if (palinaResult != null) {
	+ val routes = palinaResult.queryAllRoutes()
	+ if (routes != null && !routes.isEmpty()) {
	+ nonEmptyPalinas.add(palinaResult)
	+ listener.showCompletedArrivals(nonEmptyPalinas)
	+ }
	+ }
	+ }
	+
	+ fun cancelAllRequests() {
	+ volleyManager.getRequestQueue().cancelAll(REQUEST_TAG)
	+ //flatProgressBar.setVisibility(View.GONE);
	+ listener.onAllRequestsCancelled()
	+ }
	+
	+ interface ArrivalsListener {
	+ fun setProgress(completedRequests: Int, pendingRequests: Int)
	+
	+ fun onAllRequestsCancelled()
	+
	+ fun showCompletedArrivals(completedPalinas: ArrayList<Palina>)
	+ }
	+
	+ companion object {
	+ private const val DEBUG_TAG: String = "BusTO-NearbyArrivDowns"
	+ const val REQUEST_TAG: String = "NearbyArrivals"
	+ private const val MAX_ARRIVAL_STOPS = 35
	+
	+ }
	+}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.java b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.java
	deleted file mode 100644
	--- a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.java
	+++ /dev/null
	@@ -1,716 +0,0 @@
	-/*
	- BusTO - Fragments components
	- Copyright (C) 2018 Fabio Mazza
	-
	- This program is free software: you can redistribute it and/or modify
	- it under the terms of the GNU General Public License as published by
	- the Free Software Foundation, either version 3 of the License, or
	- (at your option) any later version.
	-
	- This program is distributed in the hope that it will be useful,
	- but WITHOUT ANY WARRANTY; without even the implied warranty of
	- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	- GNU General Public License for more details.
	-
	- You should have received a copy of the GNU General Public License
	- along with this program. If not, see <http://www.gnu.org/licenses/>.
	- */
	-package it.reyboz.bustorino.fragments;
	-
	-import android.annotation.SuppressLint;
	-import android.content.Context;
	-
	-import android.content.SharedPreferences;
	-import android.location.Location;
	-import android.os.Bundle;
	-
	-import androidx.annotation.NonNull;
	-import androidx.annotation.Nullable;
	-import androidx.lifecycle.Observer;
	-import androidx.lifecycle.ViewModelProvider;
	-import androidx.core.util.Pair;
	-import androidx.preference.PreferenceManager;
	-import androidx.appcompat.widget.AppCompatButton;
	-import androidx.recyclerview.widget.RecyclerView;
	-import androidx.work.WorkInfo;
	-
	-import android.util.Log;
	-import android.view.LayoutInflater;
	-import android.view.View;
	-import android.view.ViewGroup;
	-
	-import android.widget.ProgressBar;
	-import android.widget.TextView;
	-import it.reyboz.bustorino.BuildConfig;
	-import it.reyboz.bustorino.R;
	-import it.reyboz.bustorino.adapters.ArrivalsStopAdapter;
	-import it.reyboz.bustorino.backend.*;
	-import it.reyboz.bustorino.data.DatabaseUpdate;
	-import it.reyboz.bustorino.adapters.SquareStopAdapter;
	-import it.reyboz.bustorino.middleware.AutoFitGridLayoutManager;
	-import it.reyboz.bustorino.middleware.FusedNativeLocationProvider;
	-import it.reyboz.bustorino.util.Permissions;
	-import it.reyboz.bustorino.util.StopSorterByDistance;
	-import it.reyboz.bustorino.viewmodels.NearbyStopsViewModel;
	-import org.jetbrains.annotations.NotNull;
	-
	-import java.util.*;
	-
	-public class NearbyStopsFragment extends ScreenBaseFragment {
	-
	- @Nullable
	- @Override
	- public View getBaseViewForSnackBar() {
	- return null;
	- }
	-
	- public enum FragType{
	- STOPS(1), ARRIVALS(2);
	- private final int num;
	- FragType(int num){
	- this.num = num;
	- }
	- public static FragType fromNum(int i){
	- switch (i){
	- case 1: return STOPS;
	- case 2: return ARRIVALS;
	- default:
	- throw new IllegalArgumentException("type not recognized");
	- }
	- }
	- }
	- private enum LocationShowingStatus {SEARCHING, FIRST_FIX, DISABLED, NO_PERMISSION}
	-
	- private FragmentListenerMain mListener;
	-
	- private final static String DEBUG_TAG = "NearbyStopsFragment";
	- private final static String FRAGMENT_TYPE_KEY = "FragmentType";
	- //public final static int TYPE_STOPS = 19, TYPE_ARRIVALS = 20;
	- private FragType fragment_type = FragType.STOPS;
	-
	- public final static String FRAGMENT_TAG="NearbyStopsFrag";
	-
	- private RecyclerView gridRecyclerView;
	-
	- private SquareStopAdapter dataAdapter;
	- private AutoFitGridLayoutManager gridLayoutManager;
	- private GPSPoint lastPosition = null;
	- private ProgressBar circlingProgressBar,flatProgressBar;
	- //protected SharedPreferences globalSharedPref;
	- //private SharedPreferences.OnSharedPreferenceChangeListener preferenceChangeListener;
	- private TextView messageTextView,titleTextView, loadingTextView;
	- private CommonScrollListener scrollListener;
	- private AppCompatButton switchButton;
	- private boolean firstLocForStops = true,firstLocForArrivals = true;
	- public static final int COLUMN_WIDTH_DP = 250;
	-
	-
	- private Integer MAX_DISTANCE = -3;
	- private int MIN_NUM_STOPS = -1;
	-
	- //These are useful for the case of nearby arrivals
	- private NearbyArrivalsDownloader arrivalsManager = null;
	- private ArrivalsStopAdapter arrivalsStopAdapter = null;
	-
	- private ArrayList<Stop> currentNearbyStops = new ArrayList<>();
	-
	- private LocationShowingStatus showingStatus = LocationShowingStatus.NO_PERMISSION;
	- private boolean isLocationEnabled = false;
	-
	- private final FusedNativeLocationProvider.LocationUpdateListener locationUpdateListener = new FusedNativeLocationProvider.LocationUpdateListener() {
	- @Override
	- public void onLocationUpdate(@NotNull Location location) {
	- updateLocationViewModel(location);
	- }
	-
	- @Override
	- public void onFusedStatusChanged(boolean isEnabled) {
	- Log.d(DEBUG_TAG, "Location provider is enabled: " + isEnabled);
	- isLocationEnabled = isEnabled;
	- if(isEnabled){
	- setShowingStatus(LocationShowingStatus.SEARCHING);
	- } else{
	- setShowingStatus(LocationShowingStatus.DISABLED);
	- }
	- }
	- };
	- private final FusedNativeLocationProvider.Options locationOptionsArrivals = new FusedNativeLocationProvider.Options(5*1000L, 50f),
	- locationOptionsStops = new FusedNativeLocationProvider.Options(1000L, 5f);;
	-
	-
	-
	- /*
	- TODO: we do not request the permission in this fragment, only showing it when we have the location. Request position if this changes.
	- private final ActivityResultLauncher<String[]> permissionsResultLauncher = getPositionRequestLauncher(
	- granted ->{
	-
	- }
	- );
	- */
	- private FusedNativeLocationProvider locationProvider = null;
	-
	-
	- private final NearbyArrivalsDownloader.ArrivalsListener arrivalsListener = new NearbyArrivalsDownloader.ArrivalsListener() {
	- @Override
	- public void setProgress(int completedRequests, int pendingRequests) {
	- if(flatProgressBar!=null) {
	- if (pendingRequests == 0) {
	- flatProgressBar.setIndeterminate(true);
	- flatProgressBar.setVisibility(View.GONE);
	- } else {
	- flatProgressBar.setIndeterminate(false);
	- flatProgressBar.setProgress(completedRequests);
	- }
	- }
	- }
	-
	- @Override
	- public void onAllRequestsCancelled() {
	- if(flatProgressBar!=null) flatProgressBar.setVisibility(View.GONE);
	- }
	-
	- @Override
	- public void showCompletedArrivals(ArrayList<Palina> completedPalinas) {
	- showArrivalsInRecycler(completedPalinas);
	- }
	- };
	-
	- //ViewModel
	- private NearbyStopsViewModel viewModel;
	-
	- public NearbyStopsFragment() {
	- // Required empty public constructor
	- }
	-
	- /**
	- * Use this factory method to create a new instance of
	- * this fragment using the provided parameters.
	- * @return A new instance of fragment NearbyStopsFragment.
	- */
	- public static NearbyStopsFragment newInstance(FragType type) {
	- //if(fragmentType != TYPE_STOPS && fragmentType != TYPE_ARRIVALS )
	- // throw new IllegalArgumentException("WRONG KIND OF FRAGMENT USED");
	- NearbyStopsFragment fragment = new NearbyStopsFragment();
	- final Bundle args = new Bundle(1);
	- args.putInt(FRAGMENT_TYPE_KEY,type.num);
	- fragment.setArguments(args);
	- return fragment;
	- }
	-
	-
	-
	- @Override
	- public void onCreate(Bundle savedInstanceState) {
	- super.onCreate(savedInstanceState);
	- if (getArguments() != null) {
	- setFragmentType(FragType.fromNum(getArguments().getInt(FRAGMENT_TYPE_KEY)));
	- }
	- //locManager = (LocationManager) requireContext().getSystemService(Context.LOCATION_SERVICE);
	- //fragmentLocationListener = new FragmentLocationListener();
	- if (getContext()!=null) {
	- //globalSharedPref = getContext().getSharedPreferences(getString(R.string.mainSharedPreferences), Context.MODE_PRIVATE);
	- //globalSharedPref.registerOnSharedPreferenceChangeListener(preferenceChangeListener);
	- }
	-
	- //NearbyArrivalsDownloader nearbyArrivalsDownloader = new NearbyArrivalsDownloader(getContext().getApplicationContext(), arrivalsListener);
	- locationProvider = new FusedNativeLocationProvider(requireContext());
	- }
	-
	- @Override
	- public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
	- Bundle savedInstanceState) {
	- // Inflate the layout for this fragment
	- if (getContext() == null) throw new RuntimeException();
	- View root = inflater.inflate(R.layout.fragment_nearby_stops, container, false);
	- gridRecyclerView = root.findViewById(R.id.stopGridRecyclerView);
	- gridLayoutManager = new AutoFitGridLayoutManager(getContext().getApplicationContext(), Float.valueOf(utils.convertDipToPixels(getContext(),COLUMN_WIDTH_DP)).intValue());
	- gridRecyclerView.setLayoutManager(gridLayoutManager);
	- gridRecyclerView.setHasFixedSize(false);
	- circlingProgressBar = root.findViewById(R.id.circularProgressBar);
	- flatProgressBar = root.findViewById(R.id.horizontalProgressBar);
	- messageTextView = root.findViewById(R.id.messageTextView);
	- titleTextView = root.findViewById(R.id.titleTextView);
	- loadingTextView = root.findViewById(R.id.positionLoadingTextView);
	- switchButton = root.findViewById(R.id.switchButton);
	-
	- scrollListener = new CommonScrollListener(mListener,false);
	- switchButton.setOnClickListener(v -> switchFragmentType());
	- if(BuildConfig.DEBUG)
	- Log.d(DEBUG_TAG, "onCreateView");
	-
	- final Context appContext =requireContext().getApplicationContext();
	- DatabaseUpdate.watchUpdateWorkStatus(getContext(), this, new Observer<List<WorkInfo>>() {
	- @SuppressLint("MissingPermission")
	- @Override
	- public void onChanged(List<WorkInfo> workInfos) {
	- if(workInfos.isEmpty()) {
	- viewModel.setDBUpdateRunning(false);
	- return;
	- }
	-
	- WorkInfo wi = workInfos.get(0);
	- if (wi.getState() == WorkInfo.State.RUNNING && locationProvider.isRunning()) {
	- locationProvider.stopUpdates();
	- viewModel.setDBUpdateRunning(true);
	- } else{
	- //start the request
	- if(Permissions.bothLocationPermissionsGranted(requireContext())) {
	- if(!locationProvider.isRunning()){
	- startLocationUpdatesByType();
	- }
	- } else{
	- setShowingStatus(LocationShowingStatus.NO_PERMISSION);
	- }
	-
	- viewModel.setDBUpdateRunning(false);
	- //actually restart request
	- }
	- }
	- });
	-
	- //observe the livedata
	- viewModel.getStopsAtDistance().observe(getViewLifecycleOwner(), stops -> {
	- Log.d(DEBUG_TAG, "Received "+stops.size()+" stops nearby");
	- Integer distance = viewModel.getDistanceMtLiveData().getValue();
	- if(distance == null){
	- distance = 40;
	- }
	- if ((stops.size() < MIN_NUM_STOPS && distance <= MAX_DISTANCE)) {
	- viewModel.setDistance(distance + 40);
	- //viewModel.requestStopsAtDistance(distance, true);
	- //Log.d(DEBUG_TAG, "Doubling distance now!");
	- return; // THIS WORKS AS AN `else`
	- }
	- if(!stops.isEmpty()) {
	- currentNearbyStops =stops;
	- showStopsInViews(currentNearbyStops, lastPosition);
	- }
	- });
	- if(Permissions.anyLocationPermissionsGranted(appContext)){
	- setShowingStatus(LocationShowingStatus.SEARCHING);
	- } else {
	- setShowingStatus(LocationShowingStatus.NO_PERMISSION);
	-
	- }
	- //add location listener
	- locationProvider.addListener(locationUpdateListener);
	-
	- return root;
	- }
	-
	- //because linter is stupid and cannot look inside anyLocationPermissionGranted
	- @SuppressLint("MissingPermission")
	- private boolean requestLocationUpdates(){
	- if(Permissions.anyLocationPermissionsGranted(requireContext())) {
	- startLocationUpdatesByType();
	- return true;
	- } else return false;
	- }
	-
	- /**
	- * Internal bit used to start location updates
	- */
	- private void startLocationUpdatesByType(){
	- switch (fragment_type) {
	- case STOPS: locationProvider.startUpdates(locationOptionsStops); break;
	- case ARRIVALS: locationProvider.startUpdates(locationOptionsArrivals); break;
	- }
	- }
	-
	-
	-
	- /**
	- * Use this method to set the fragment type
	- * @param type the type, TYPE_ARRIVALS or TYPE_STOPS
	- */
	- private void setFragmentType(FragType type){
	- boolean isChanged = fragment_type != type;
	- this.fragment_type = type;
	- /*switch(type){
	- case ARRIVALS:
	- TIME_INTERVAL_REQUESTS = 5*1000;
	- break;
	- case STOPS:
	- TIME_INTERVAL_REQUESTS = 1000;
	-
	- }
	-
	- */
	- if(isChanged){
	- startLocationUpdatesByType();
	- setShowingStatus(LocationShowingStatus.SEARCHING);
	- }
	- }
	- /**
	- * Set the location in the view model if it is good
	- * @param location new location
	- */
	- private void updateLocationViewModel(@NonNull Location location, float accuracy){
	- if(viewModel==null) {
	- return;
	- }
	- if(location.getAccuracy()<accuracy) {
	- lastPosition = new GPSPoint(location.getLatitude(), location.getLongitude());
	- //viewModel.requestStopsAtDistance(location.getLatitude(), location.getLongitude(), distance, true);
	- viewModel.setLastLocation(location);
	- }
	- }
	- private void updateLocationViewModel(@NonNull Location location){
	- updateLocationViewModel(location, 150);
	- }
	-
	- private void setShowingStatus(@NonNull LocationShowingStatus newStatus){
	- if(BuildConfig.DEBUG)
	- Log.d(DEBUG_TAG, "Asked to set showing status : " + newStatus);
	- if(newStatus == showingStatus){
	- return;
	- }
	- if(!isLocationEnabled && newStatus!=LocationShowingStatus.NO_PERMISSION){
	- Log.d(DEBUG_TAG, "asked to show status: "+newStatus+" but the position is disabled");
	- newStatus = LocationShowingStatus.DISABLED;
	- }
	-
	- switch (newStatus){
	- case FIRST_FIX:
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- gridRecyclerView.setVisibility(View.VISIBLE);
	- messageTextView.setVisibility(View.GONE);
	- break;
	- case NO_PERMISSION:
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- messageTextView.setText(R.string.enable_position_message_nearby);
	- messageTextView.setVisibility(View.VISIBLE);
	- break;
	- case DISABLED:
	- //if (showingStatus== LocationShowingStatus.SEARCHING){
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- //}
	- messageTextView.setText(R.string.enable_location_message);
	- messageTextView.setVisibility(View.VISIBLE);
	- break;
	- case SEARCHING:
	- circlingProgressBar.setVisibility(View.VISIBLE);
	- loadingTextView.setVisibility(View.VISIBLE);
	- gridRecyclerView.setVisibility(View.GONE);
	- messageTextView.setVisibility(View.GONE);
	- }
	- showingStatus = newStatus;
	- }
	-
	-
	- @Override
	- public void onAttach(@NonNull Context context) {
	- super.onAttach(context);
	- if (context instanceof FragmentListenerMain) {
	- mListener = (FragmentListenerMain) context;
	- } else {
	- throw new RuntimeException(context
	- + " must implement OnFragmentInteractionListener");
	- }
	- Log.d(DEBUG_TAG, "OnAttach called");
	- viewModel = new ViewModelProvider(this).get(NearbyStopsViewModel.class);
	-
	-
	- }
	-
	- @Override
	- public void onPause() {
	- super.onPause();
	-
	- gridRecyclerView.setAdapter(null);
	- Log.d(DEBUG_TAG,"On paused called");
	-
	- locationProvider.stopUpdates();
	- }
	-
	- @Override
	- public void onResume() {
	- super.onResume();
	- //fix view if we were showing the stops or the arrivals
	- prepareForFragmentType();
	- switch(fragment_type){
	- case STOPS:
	- if(dataAdapter!=null){
	- //gridRecyclerView.setAdapter(dataAdapter);
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- }
	- break;
	- case ARRIVALS:
	- if(arrivalsStopAdapter!=null){
	- //gridRecyclerView.setAdapter(arrivalsStopAdapter);
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- }
	- }
	-
	- mListener.enableRefreshLayout(false);
	- Log.d(DEBUG_TAG,"OnResume called");
	- if(getContext()==null){
	- Log.e(DEBUG_TAG, "NULL CONTEXT, everything is going to crash now");
	- MIN_NUM_STOPS = 5;
	- MAX_DISTANCE = 600;
	- return;
	- }
	- //Re-read preferences
	- SharedPreferences shpr = PreferenceManager.getDefaultSharedPreferences(getContext().getApplicationContext());
	- //For some reason, they are all saved as strings
	- MAX_DISTANCE = shpr.getInt(getString(R.string.pref_key_radius_recents),600);
	- boolean isMinStopInt = true;
	- try{
	- MIN_NUM_STOPS = shpr.getInt(getString(R.string.pref_key_num_recents), 5);
	- } catch (ClassCastException ex){
	- isMinStopInt = false;
	- }
	- if(!isMinStopInt)
	- try {
	- MIN_NUM_STOPS = Integer.parseInt(shpr.getString(getString(R.string.pref_key_num_recents), "5"));
	- } catch (NumberFormatException ex){
	- MIN_NUM_STOPS = 5;
	- }
	- if(BuildConfig.DEBUG)
	- Log.d(DEBUG_TAG, "Max distance for stops: "+MAX_DISTANCE+ ", Min number of stops: "+MIN_NUM_STOPS);
	-
	- if(!locationProvider.isRunning()){
	- startLocationUpdatesByType();
	- }
	-
	- }
	-
	-
	- @Override
	- public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
	- super.onViewCreated(view, savedInstanceState);
	- gridRecyclerView.setVisibility(View.INVISIBLE);
	- gridRecyclerView.addOnScrollListener(scrollListener);
	- if(mListener!=null) mListener.readyGUIfor(FragmentKind.NEARBY_STOPS);
	- }
	-
	- @Override
	- public void onDetach() {
	- super.onDetach();
	- mListener = null;
	- if(arrivalsManager!=null) arrivalsManager.cancelAllRequests();
	- }
	-
	- /**
	- * Display the stops, or run new set of requests for arrivals
	- */
	- private void showStopsInViews(ArrayList<Stop> stops, GPSPoint location){
	- if (stops.isEmpty()) {
	- setNoStopsLayout();
	- return;
	- }
	- if (location == null){
	- // we could do something better, but it's better to do this for now
	- return;
	- }
	-
	- double minDistance = Double.POSITIVE_INFINITY;
	- for(Stop s: stops){
	- minDistance = Math.min(minDistance, s.getDistanceFromLocation(location.getLatitude(), location.getLongitude()));
	- }
	-
	-
	- //quick trial to hopefully always get the stops in the correct order
	- Collections.sort(stops,new StopSorterByDistance(location));
	- switch (fragment_type){
	- case STOPS:
	- showStopsInRecycler(stops);
	- break;
	- case ARRIVALS:
	- if(getContext()==null) break; //don't do anything if we're not attached
	- if(arrivalsManager==null)
	- arrivalsManager = new NearbyArrivalsDownloader(getContext().getApplicationContext(), arrivalsListener);
	- arrivalsManager.requestArrivalsForStops(stops);
	- /*flatProgressBar.setVisibility(View.VISIBLE);
	- flatProgressBar.setProgress(0);
	- flatProgressBar.setIndeterminate(false);
	- */
	- //for the moment, be satisfied with only one location
	- //AppLocationManager.getInstance(getContext()).removeLocationRequestFor(fragmentLocationListener);
	- break;
	- default:
	- }
	-
	- }
	-
	- /**
	- * To enable targeting from the Button
	- */
	- public void switchFragmentType(View v){
	- switchFragmentType();
	- }
	-
	- /**
	- * Call when you need to switch the type of fragment
	- */
	- private void switchFragmentType(){
	- switch (fragment_type){
	- case ARRIVALS:
	- setFragmentType(FragType.STOPS);
	- break;
	- case STOPS:
	- setFragmentType(FragType.ARRIVALS);
	- break;
	- default:
	- }
	- prepareForFragmentType();
	- //locManager.removeLocationRequestFor(fragmentLocationListener);
	- //locManager.addLocationRequestFor(fragmentLocationListener);
	- if(lastPosition!=null) {
	- // we have at least one fix on the position
	- showStopsInViews(currentNearbyStops, lastPosition);
	- }
	- }
	-
	- /**
	- * Prepare the views for the set fragment type
	- */
	- private void prepareForFragmentType(){
	- if(fragment_type==FragType.STOPS){
	- switchButton.setText(getString(R.string.show_arrivals));
	- titleTextView.setText(getString(R.string.nearby_stops_message));
	- if(arrivalsManager!=null)
	- arrivalsManager.cancelAllRequests();
	- if(dataAdapter!=null)
	- gridRecyclerView.setAdapter(dataAdapter);
	-
	- } else if (fragment_type==FragType.ARRIVALS){
	- titleTextView.setText(getString(R.string.nearby_arrivals_message));
	- switchButton.setText(getString(R.string.show_stops));
	- if(arrivalsStopAdapter!=null)
	- gridRecyclerView.setAdapter(arrivalsStopAdapter);
	- }
	- }
	-
	- //useful methods
	-
	- /////// GUI METHODS ////////
	- private void showStopsInRecycler(List<Stop> stops){
	-
	- if(firstLocForStops) {
	- dataAdapter = new SquareStopAdapter(stops, mListener, lastPosition);
	- gridRecyclerView.setAdapter(dataAdapter);
	- firstLocForStops = false;
	- }else {
	- dataAdapter.setStops(stops);
	- dataAdapter.setUserPosition(lastPosition);
	- }
	- dataAdapter.notifyDataSetChanged();
	-
	- //showRecyclerHidingLoadMessage();
	- if (gridRecyclerView.getVisibility() != View.VISIBLE) {
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- gridRecyclerView.setVisibility(View.VISIBLE);
	- }
	- messageTextView.setVisibility(View.GONE);
	-
	- if(mListener!=null) mListener.readyGUIfor(FragmentKind.NEARBY_STOPS);
	- }
	-
	- private void showArrivalsInRecycler(List<Palina> palinas){
	- Collections.sort(palinas,new StopSorterByDistance(lastPosition));
	-
	- final ArrayList<Pair<Stop,Route>> routesPairList = new ArrayList<>(10);
	- //int maxNum = Math.min(MAX_STOPS, stopList.size());
	- for(Palina p: palinas){
	- //if there are no routes available, skip stop
	- if(p.queryAllRoutes().isEmpty()) continue;
	- for(Route r: p.queryAllRoutes()){
	- //if there are no routes, should not do anything
	- if (r.passaggi != null && !r.passaggi.isEmpty())
	- routesPairList.add(new Pair<>(p,r));
	- }
	- }
	- if (getContext()==null){
	- Log.e(DEBUG_TAG, "Trying to show arrivals in Recycler but we're not attached");
	- return;
	- }
	- if(firstLocForArrivals){
	- arrivalsStopAdapter = new ArrivalsStopAdapter(routesPairList,mListener,getContext(),lastPosition);
	- gridRecyclerView.setAdapter(arrivalsStopAdapter);
	- firstLocForArrivals = false;
	- } else {
	- arrivalsStopAdapter.setRoutesPairListAndPosition(routesPairList,lastPosition);
	- }
	-
	- //arrivalsStopAdapter.notifyDataSetChanged();
	-
	- showRecyclerHidingLoadMessage();
	- if(mListener!=null) mListener.readyGUIfor(FragmentKind.NEARBY_ARRIVALS);
	-
	- }
	-
	- private void setNoStopsLayout(){
	- messageTextView.setVisibility(View.VISIBLE);
	- messageTextView.setText(R.string.no_stops_nearby);
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- }
	-
	- /**
	- * Does exactly what is says on the tin
	- */
	- private void showRecyclerHidingLoadMessage(){
	- if (gridRecyclerView.getVisibility() != View.VISIBLE) {
	- circlingProgressBar.setVisibility(View.GONE);
	- loadingTextView.setVisibility(View.GONE);
	- gridRecyclerView.setVisibility(View.VISIBLE);
	- }
	- messageTextView.setVisibility(View.GONE);
	- }
	-
	- /*
	- * Local locationListener, to use for the GPS
	- */
	- /*
	- class FragmentLocationListener implements LocationListenerCompat {
	-
	- private long lastUpdateTime = -1;
	- public boolean isRegistered = false;
	-
	- @Override
	- public void onLocationChanged(@NonNull Location location) {
	- if(viewModel==null){
	- return;
	- }
	- if(location.getAccuracy()<200) {
	-
	- lastPosition = new GPSPoint(location.getLatitude(), location.getLongitude());
	- //viewModel.requestStopsAtDistance(location.getLatitude(), location.getLongitude(), distance, true);
	- viewModel.setLastLocation(location);
	- }
	- lastUpdateTime = System.currentTimeMillis();
	- //Log.d("BusTO:NearPositListen","can start request for stops: "+ !dbUpdateRunning);
	- }
	-
	- @Override
	- public void onProviderEnabled(@NonNull String provider) {
	- Log.d(DEBUG_TAG, "Location provider "+provider+" enabled");
	- if(provider.equals(LocationManager.GPS_PROVIDER)){
	- setShowingStatus(LocationShowingStatus.SEARCHING);
	- }
	- }
	-
	- @Override
	- public void onProviderDisabled(@NonNull String provider) {
	- Log.d(DEBUG_TAG, "Location provider "+provider+" disabled");
	- if(provider.equals(LocationManager.GPS_PROVIDER)) {
	- setShowingStatus(LocationShowingStatus.DISABLED);
	- }
	- }
	-
	- @Override
	- public void onStatusChanged(@NonNull String provider, int status, @Nullable Bundle extras) {
	- LocationListenerCompat.super.onStatusChanged(provider, status, extras);
	- }
	- }
	-
	- */
	-
	-}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.kt b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.kt
	new file mode 100644
	--- /dev/null
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/NearbyStopsFragment.kt
	@@ -0,0 +1,682 @@
	+/*
	+ BusTO - Fragments components
	+ Copyright (C) 2018 Fabio Mazza
	+
	+ This program is free software: you can redistribute it and/or modify
	+ it under the terms of the GNU General Public License as published by
	+ the Free Software Foundation, either version 3 of the License, or
	+ (at your option) any later version.
	+
	+ This program is distributed in the hope that it will be useful,
	+ but WITHOUT ANY WARRANTY; without even the implied warranty of
	+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	+ GNU General Public License for more details.
	+
	+ You should have received a copy of the GNU General Public License
	+ along with this program. If not, see <http://www.gnu.org/licenses/>.
	+ */
	+package it.reyboz.bustorino.fragments
	+
	+import android.annotation.SuppressLint
	+import android.content.Context
	+import android.location.Location
	+import android.os.Bundle
	+import android.util.Log
	+import android.view.LayoutInflater
	+import android.view.View
	+import android.view.ViewGroup
	+import android.widget.ProgressBar
	+import android.widget.TextView
	+import androidx.appcompat.widget.AppCompatButton
	+import androidx.core.util.Pair
	+import androidx.fragment.app.viewModels
	+import androidx.preference.PreferenceManager
	+import androidx.recyclerview.widget.RecyclerView
	+import androidx.work.WorkInfo
	+import it.reyboz.bustorino.BuildConfig
	+import it.reyboz.bustorino.R
	+import it.reyboz.bustorino.adapters.ArrivalsStopAdapter
	+import it.reyboz.bustorino.adapters.SquareStopAdapter
	+import it.reyboz.bustorino.backend.*
	+import it.reyboz.bustorino.data.DatabaseUpdate
	+import it.reyboz.bustorino.middleware.AutoFitGridLayoutManager
	+import it.reyboz.bustorino.middleware.FusedNativeLocationProvider
	+import it.reyboz.bustorino.middleware.FusedNativeLocationProvider.LocationUpdateListener
	+import it.reyboz.bustorino.util.Permissions.Companion.anyLocationPermissionsGranted
	+import it.reyboz.bustorino.util.Permissions.Companion.bothLocationPermissionsGranted
	+import it.reyboz.bustorino.util.StopSorterByDistance
	+import it.reyboz.bustorino.viewmodels.NearbyStopsViewModel
	+import java.util.*
	+import kotlin.math.min
	+
	+class NearbyStopsFragment : ScreenBaseFragment() {
	+ override fun getBaseViewForSnackBar(): View? {
	+ return null
	+ }
	+
	+ enum class FragType(val num: Int) {
	+ STOPS(1), ARRIVALS(2);
	+
	+ companion object {
	+ @JvmStatic
	+ fun fromNum(i: Int): FragType {
	+ when (i) {
	+ 1 -> return STOPS
	+ 2 -> return ARRIVALS
	+ else -> throw IllegalArgumentException("type not recognized")
	+ }
	+ }
	+ }
	+ }
	+
	+ private enum class LocationShowingStatus {
	+ SEARCHING, FIRST_FIX, DISABLED, NO_PERMISSION
	+ }
	+
	+ private var mListener: FragmentListenerMain? = null
	+
	+ private var fragment_type = FragType.STOPS
	+
	+ private lateinit var gridRecyclerView: RecyclerView
	+
	+ private var dataAdapter: SquareStopAdapter? = null
	+ private var gridLayoutManager: AutoFitGridLayoutManager? = null
	+ private var lastPosition: GPSPoint? = null
	+ private var circlingProgressBar: ProgressBar? = null
	+ private lateinit var flatProgressBar: ProgressBar
	+
	+ //protected SharedPreferences globalSharedPref;
	+ //private SharedPreferences.OnSharedPreferenceChangeListener preferenceChangeListener;
	+ private var messageTextView: TextView? = null
	+ private var titleTextView: TextView? = null
	+ private var loadingTextView: TextView? = null
	+ private var scrollListener: CommonScrollListener? = null
	+ private var switchButton: AppCompatButton? = null
	+ private var firstLocForStops = true
	+ private var firstLocForArrivals = true
	+ private var stopsMaxDistance = -3
	+ private var stopsMinNumber = -1
	+
	+ //These are useful for the case of nearby arrivals
	+ private var arrivalsStopAdapter: ArrivalsStopAdapter? = null
	+
	+ private var currentNearbyStops = ArrayList<Stop>()
	+
	+ private var showingStatus = LocationShowingStatus.NO_PERMISSION
	+ private var isLocationEnabled = false
	+
	+ private val locationUpdateListener: LocationUpdateListener = object : LocationUpdateListener {
	+ override fun onLocationUpdate(location: Location) {
	+ updateLocationViewModel(location)
	+ }
	+
	+ override fun onFusedStatusChanged(isEnabled: Boolean) {
	+ Log.d(DEBUG_TAG, "Location provider is enabled: " + isEnabled)
	+ isLocationEnabled = isEnabled
	+ if (isEnabled) {
	+ setShowingStatus(LocationShowingStatus.SEARCHING)
	+ } else {
	+ setShowingStatus(LocationShowingStatus.DISABLED)
	+ }
	+ }
	+ }
	+ // Two different settings for the location provider
	+ private val locationOptionsArrivals = FusedNativeLocationProvider.Options(5 * 1000L, 25f)
	+ private val locationOptionsStops = FusedNativeLocationProvider.Options(1000L, 5f)
	+
	+ private var locationProvider: FusedNativeLocationProvider? = null
	+
	+
	+ /*private val arrivalsListener: ArrivalsListener = object : ArrivalsListener {
	+ override fun setProgress(completedRequests: Int, pendingRequests: Int) {
	+ if (pendingRequests == 0) {
	+ flatProgressBar.setIndeterminate(true)
	+ flatProgressBar.setVisibility(View.GONE)
	+ } else {
	+ flatProgressBar.setIndeterminate(false)
	+ flatProgressBar.progress = completedRequests
	+ }
	+ }
	+
	+ /*override fun onAllRequestsCancelled() {
	+ if (flatProgressBar != null) flatProgressBar!!.setVisibility(View.GONE)
	+ }
	+
	+ */
	+
	+ override fun showCompletedArrivals(completedPalinas: ArrayList<Palina>) {
	+ showArrivalsInRecycler(completedPalinas)
	+ }
	+ }
	+
	+ */
	+
	+ //ViewModel
	+ private val viewModel : NearbyStopsViewModel by viewModels()
	+
	+ override fun onCreate(savedInstanceState: Bundle?) {
	+ super.onCreate(savedInstanceState)
	+ arguments?.let{
	+
	+ setFragmentType(FragType.fromNum(it.getInt(FRAGMENT_TYPE_KEY)))
	+ }
	+ //locManager = (LocationManager) requireContext().getSystemService(Context.LOCATION_SERVICE);
	+ //fragmentLocationListener = new FragmentLocationListener();
	+ if (getContext() != null) {
	+ //globalSharedPref = getContext().getSharedPreferences(getString(R.string.mainSharedPreferences), Context.MODE_PRIVATE);
	+ //globalSharedPref.registerOnSharedPreferenceChangeListener(preferenceChangeListener);
	+ }
	+
	+ //NearbyArrivalsDownloader nearbyArrivalsDownloader = new NearbyArrivalsDownloader(getContext().getApplicationContext(), arrivalsListener);
	+ locationProvider = FusedNativeLocationProvider(requireContext())
	+ }
	+
	+ override fun onCreateView(
	+ inflater: LayoutInflater, container: ViewGroup?,
	+ savedInstanceState: Bundle?
	+ ): View {
	+ // Inflate the layout for this fragment
	+ if (getContext() == null) throw RuntimeException()
	+ val root = inflater.inflate(R.layout.fragment_nearby_stops, container, false)
	+ gridRecyclerView = root.findViewById<RecyclerView>(R.id.stopGridRecyclerView)
	+ gridLayoutManager = AutoFitGridLayoutManager(
	+ requireContext().getApplicationContext(),
	+ utils.convertDipToPixels(getContext(), COLUMN_WIDTH_DP.toFloat()).toInt()
	+ )
	+ gridRecyclerView.setLayoutManager(gridLayoutManager)
	+ gridRecyclerView.setHasFixedSize(false)
	+ circlingProgressBar = root.findViewById<ProgressBar>(R.id.circularProgressBar)
	+ flatProgressBar = root.findViewById(R.id.horizontalProgressBar)
	+ messageTextView = root.findViewById<TextView>(R.id.messageTextView)
	+ titleTextView = root.findViewById<TextView>(R.id.titleTextView)
	+ loadingTextView = root.findViewById<TextView>(R.id.positionLoadingTextView)
	+ switchButton = root.findViewById<AppCompatButton>(R.id.switchButton)
	+
	+ scrollListener = CommonScrollListener(mListener, false)
	+ switchButton!!.setOnClickListener(View.OnClickListener { v: View? -> switchFragmentType() })
	+ if (BuildConfig.DEBUG) Log.d(DEBUG_TAG, "onCreateView")
	+
	+ val appContext = requireContext().applicationContext
	+ DatabaseUpdate.watchUpdateWorkStatus(context, this){ workInfos ->
	+ if (workInfos.isEmpty()) {
	+ viewModel.setDBUpdateRunning(false)
	+ return@watchUpdateWorkStatus
	+ }
	+
	+ val wi = workInfos.get(0)
	+ if (wi.state == WorkInfo.State.RUNNING && locationProvider!!.isRunning()) {
	+ locationProvider!!.stopUpdates()
	+ viewModel.setDBUpdateRunning(true)
	+ } else {
	+ //start the request
	+ if (bothLocationPermissionsGranted(requireContext())) {
	+ if (!locationProvider!!.isRunning()) {
	+ startLocationUpdatesByType()
	+ }
	+ } else {
	+ setShowingStatus(LocationShowingStatus.NO_PERMISSION)
	+ }
	+
	+ viewModel.setDBUpdateRunning(false)
	+ //actually restart request
	+ }
	+ }
	+
	+
	+ if (anyLocationPermissionsGranted(appContext)) {
	+ setShowingStatus(LocationShowingStatus.SEARCHING)
	+ } else {
	+ setShowingStatus(LocationShowingStatus.NO_PERMISSION)
	+ }
	+ //add location listener
	+ locationProvider!!.addListener(locationUpdateListener)
	+
	+ return root
	+ }
	+
	+
	+ override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
	+ super.onViewCreated(view, savedInstanceState)
	+ gridRecyclerView.setVisibility(View.INVISIBLE)
	+ gridRecyclerView.addOnScrollListener(scrollListener!!)
	+ //mListener?.readyGUIfor(FragmentKind.NEARBY_STOPS)
	+
	+ //observe the livedata
	+ viewModel.stopsAtDistance.observe(getViewLifecycleOwner()) {stops ->
	+ Log.d(DEBUG_TAG, "Received " + stops.size + " stops nearby")
	+ var distance = viewModel.distanceMtLiveData.getValue()
	+ if (distance == null) {
	+ distance = 40
	+ }
	+ if ((stops.size < stopsMinNumber && distance <= stopsMaxDistance)) {
	+ viewModel.setDistance(distance + 40)
	+ //viewModel.requestStopsAtDistance(distance, true);
	+ //Log.d(DEBUG_TAG, "Doubling distance now!");
	+ return@observe // THIS WORKS AS AN `else`
	+ }
	+ if (!stops.isEmpty()) {
	+ currentNearbyStops = stops
	+ showStopsInViews(currentNearbyStops, lastPosition)
	+ }
	+ }
	+
	+ viewModel.downloadingArrivals.observe(viewLifecycleOwner){ running ->
	+ if(!running) flatProgressBar.visibility = View.GONE
	+ else flatProgressBar.visibility = View.VISIBLE
	+ }
	+ viewModel.progressPerc.observe(viewLifecycleOwner){ progress ->
	+ flatProgressBar.isIndeterminate = false
	+ flatProgressBar.progress = progress
	+ flatProgressBar.max = 100
	+
	+ if (progress<100){
	+ flatProgressBar.visibility = View.VISIBLE
	+ }
	+
	+ }
	+
	+ viewModel.arrivalsDecoupled.observe(viewLifecycleOwner){ stoprouteList ->
	+ if (getContext() == null) {
	+ Log.e(DEBUG_TAG, "Trying to show arrivals in Recycler but we're not attached")
	+ return@observe
	+ }
	+ if (firstLocForArrivals) {
	+ arrivalsStopAdapter = ArrivalsStopAdapter(stoprouteList, mListener, context, lastPosition!!)
	+ gridRecyclerView.setAdapter(arrivalsStopAdapter)
	+ firstLocForArrivals = false
	+ } else {
	+ arrivalsStopAdapter!!.setRoutesPairListAndPosition(stoprouteList, lastPosition)
	+ }
	+
	+ //arrivalsStopAdapter.notifyDataSetChanged();
	+ showRecyclerHidingLoadMessage()
	+ //if (mListener != null) mListener!!.readyGUIfor(FragmentKind.NEARBY_ARRIVALS)
	+ }
	+ }
	+
	+
	+ /**
	+ * Internal bit used to start location updates
	+ */
	+ private fun startLocationUpdatesByType() {
	+ when (fragment_type) {
	+ FragType.STOPS -> locationProvider!!.startUpdates(locationOptionsStops)
	+ FragType.ARRIVALS -> locationProvider!!.startUpdates(locationOptionsArrivals)
	+ }
	+ }
	+
	+
	+ /**
	+ * Use this method to set the fragment type
	+ * @param type the type, TYPE_ARRIVALS or TYPE_STOPS
	+ */
	+ private fun setFragmentType(type: FragType) {
	+ val isChanged = fragment_type != type
	+ this.fragment_type = type
	+ /*switch(type){
	+ case ARRIVALS:
	+ TIME_INTERVAL_REQUESTS = 5*1000;
	+ break;
	+ case STOPS:
	+ TIME_INTERVAL_REQUESTS = 1000;
	+
	+ }
	+
	+ */
	+ if (isChanged) {
	+ startLocationUpdatesByType()
	+ setShowingStatus(LocationShowingStatus.SEARCHING)
	+ }
	+ }
	+
	+ /**
	+ * Set the location in the view model if it is good
	+ * @param location new location
	+ */
	+ private fun updateLocationViewModel(location: Location, accuracy: Float = 150f) {
	+ if (location.getAccuracy() < accuracy) {
	+ lastPosition = GPSPoint(location.getLatitude(), location.getLongitude())
	+ //viewModel.requestStopsAtDistance(location.getLatitude(), location.getLongitude(), distance, true);
	+ viewModel.setLastLocation(location)
	+ }
	+ }
	+
	+ private fun setShowingStatus(newStatus: LocationShowingStatus) {
	+ var newStatus = newStatus
	+ if (BuildConfig.DEBUG) Log.d(DEBUG_TAG, "Asked to set showing status : $newStatus")
	+ if (newStatus == showingStatus) {
	+ return
	+ }
	+ if (!isLocationEnabled && newStatus != LocationShowingStatus.NO_PERMISSION) {
	+ Log.d(DEBUG_TAG, "asked to show status: $newStatus but the position is disabled")
	+ newStatus = LocationShowingStatus.DISABLED
	+ }
	+
	+ when (newStatus) {
	+ LocationShowingStatus.FIRST_FIX -> {
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ gridRecyclerView.setVisibility(View.VISIBLE)
	+ messageTextView!!.setVisibility(View.GONE)
	+ }
	+
	+ LocationShowingStatus.NO_PERMISSION -> {
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ messageTextView!!.setText(R.string.enable_position_message_nearby)
	+ messageTextView!!.setVisibility(View.VISIBLE)
	+ }
	+
	+ LocationShowingStatus.DISABLED -> {
	+ //if (showingStatus== LocationShowingStatus.SEARCHING){
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ //}
	+ messageTextView!!.setText(R.string.enable_location_message)
	+ messageTextView!!.setVisibility(View.VISIBLE)
	+ }
	+
	+ LocationShowingStatus.SEARCHING -> {
	+ circlingProgressBar!!.setVisibility(View.VISIBLE)
	+ loadingTextView!!.setVisibility(View.VISIBLE)
	+ gridRecyclerView.setVisibility(View.GONE)
	+ messageTextView!!.setVisibility(View.GONE)
	+ }
	+ }
	+ showingStatus = newStatus
	+ }
	+
	+
	+ override fun onAttach(context: Context) {
	+ super.onAttach(context)
	+ if (context is FragmentListenerMain) {
	+ mListener = context as FragmentListenerMain
	+ } else {
	+ throw RuntimeException(
	+ context
	+ .toString() + " must implement OnFragmentInteractionListener"
	+ )
	+ }
	+ Log.d(DEBUG_TAG, "OnAttach called")
	+ //viewModel = ViewModelProvider(this).get<NearbyStopsViewModel?>(NearbyStopsViewModel::class.java)
	+ }
	+
	+ override fun onPause() {
	+ super.onPause()
	+
	+ //gridRecyclerView.setAdapter(null)
	+ Log.d(DEBUG_TAG, "On paused called")
	+
	+ locationProvider!!.stopUpdates()
	+ }
	+
	+ override fun onResume() {
	+ super.onResume()
	+ //fix view if we were showing the stops or the arrivals
	+ prepareForFragmentType()
	+ when (fragment_type) {
	+ FragType.STOPS -> if (dataAdapter != null) {
	+ //gridRecyclerView.setAdapter(dataAdapter);
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ }
	+
	+ FragType.ARRIVALS -> if (arrivalsStopAdapter != null) {
	+ //gridRecyclerView.setAdapter(arrivalsStopAdapter);
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ }
	+ }
	+
	+ mListener!!.enableRefreshLayout(false)
	+ Log.d(DEBUG_TAG, "OnResume called")
	+ if (getContext() == null) {
	+ Log.e(DEBUG_TAG, "NULL CONTEXT, everything is going to crash now")
	+ stopsMinNumber = 5
	+ stopsMaxDistance = 600
	+ return
	+ }
	+ //Re-read preferences
	+ val shpr = PreferenceManager.getDefaultSharedPreferences(requireContext().getApplicationContext())
	+ //For some reason, they are all saved as strings
	+ stopsMaxDistance = shpr.getInt(getString(R.string.pref_key_radius_recents), 600)
	+ var isMinStopInt = true
	+ try {
	+ stopsMinNumber = shpr.getInt(getString(R.string.pref_key_num_recents), 5)
	+ } catch (ex: ClassCastException) {
	+ isMinStopInt = false
	+ }
	+ if (!isMinStopInt) try {
	+ stopsMinNumber = shpr.getString(getString(R.string.pref_key_num_recents), "5")!!.toInt()
	+ } catch (ex: NumberFormatException) {
	+ stopsMinNumber = 5
	+ }
	+ if (BuildConfig.DEBUG) Log.d(
	+ DEBUG_TAG,
	+ "Max distance for stops: $stopsMaxDistance, Min number of stops: $stopsMinNumber"
	+ )
	+
	+ if (!locationProvider!!.isRunning()) {
	+ startLocationUpdatesByType()
	+ }
	+ }
	+
	+
	+
	+
	+ override fun onDetach() {
	+ super.onDetach()
	+ mListener = null
	+ //if (arrivalsManager != null) arrivalsManager!!.cancelAllRequests()
	+ }
	+
	+ /**
	+ * Display the stops, or run new set of requests for arrivals
	+ */
	+ private fun showStopsInViews(stops: ArrayList<Stop>, location: GPSPoint?) {
	+ if (stops.isEmpty()) {
	+ setNoStopsLayout()
	+ return
	+ }
	+ if (location == null) {
	+ // we could do something better, but it's better to do this for now
	+ return
	+ }
	+
	+ /*var minDistance = Double.POSITIVE_INFINITY
	+ for (s in stops) {
	+ minDistance = min(minDistance, s.getDistanceFromLocation(location.getLatitude(), location.getLongitude()))
	+ }
	+
	+ */
	+
	+
	+ //quick trial to hopefully always get the stops in the correct order
	+ Collections.sort<Stop?>(stops, StopSorterByDistance(location))
	+ when (fragment_type) {
	+ FragType.STOPS -> showStopsInRecycler(stops)
	+ FragType.ARRIVALS -> {
	+ //don't do anything if we're not attached
	+ /*context?.let{
	+ if (arrivalsManager == null) arrivalsManager =
	+ NearbyArrivalsDownloader(it.applicationContext, arrivalsListener)
	+ arrivalsManager!!.requestArrivalsForStops(stops)
	+ }
	+
	+ */
	+ viewModel.requestArrivalsForStops(stops)
	+ }
	+ }
	+ }
	+
	+ /**
	+ * To enable targeting from the Button
	+ */
	+ fun switchFragmentType(v: View?) {
	+ switchFragmentType()
	+ }
	+
	+ /**
	+ * Call when you need to switch the type of fragment
	+ */
	+ private fun switchFragmentType() {
	+ when (fragment_type) {
	+ FragType.ARRIVALS -> setFragmentType(FragType.STOPS)
	+ FragType.STOPS -> setFragmentType(FragType.ARRIVALS)
	+ else -> {}
	+ }
	+ prepareForFragmentType()
	+ //locManager.removeLocationRequestFor(fragmentLocationListener);
	+ //locManager.addLocationRequestFor(fragmentLocationListener);
	+ if (lastPosition != null) {
	+ // we have at least one fix on the position
	+ showStopsInViews(currentNearbyStops, lastPosition)
	+ }
	+ }
	+
	+ /**
	+ * Prepare the views for the set fragment type
	+ */
	+ private fun prepareForFragmentType() {
	+ if (fragment_type == FragType.STOPS) {
	+ switchButton!!.text = getString(R.string.show_arrivals)
	+ titleTextView!!.text = getString(R.string.nearby_stops_message)
	+
	+ dataAdapter?.let{ gridRecyclerView.adapter = it}
	+
	+ mListener?.readyGUIfor(FragmentKind.NEARBY_STOPS)
	+
	+ } else if (fragment_type == FragType.ARRIVALS) {
	+ titleTextView!!.text = getString(R.string.nearby_arrivals_message)
	+ switchButton!!.text = getString(R.string.show_stops)
	+ val arrivalsSorted = viewModel.arrivalsDecoupled.value
	+ arrivalsSorted?.let{
	+ lastPosition?.let{pos ->
	+ arrivalsStopAdapter = ArrivalsStopAdapter(it,mListener,requireContext(), pos )
	+ }
	+ }
	+ arrivalsStopAdapter?.let{
	+ gridRecyclerView.setAdapter(it)
	+ }
	+
	+ mListener?.readyGUIfor(FragmentKind.NEARBY_ARRIVALS)
	+ }
	+ }
	+
	+ //useful methods
	+ /*//// GUI METHODS //////// /
	+ private fun showStopsInRecycler(stops: MutableList<Stop>?) {
	+ if (dataAdapter == null) {
	+ dataAdapter = SquareStopAdapter(stops, mListener, lastPosition)
	+ gridRecyclerView!!.setAdapter(dataAdapter)
	+ firstLocForStops = false
	+ } else {
	+ dataAdapter!!.setUserPosition(lastPosition)
	+ dataAdapter!!.setStops(stops)
	+ }
	+
	+ //showRecyclerHidingLoadMessage();
	+ if (gridRecyclerView!!.getVisibility() != View.VISIBLE) {
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ gridRecyclerView!!.setVisibility(View.VISIBLE)
	+ }
	+ messageTextView!!.setVisibility(View.GONE)
	+
	+ }
	+
	+ private fun showArrivalsInRecycler(routesPairList: List<Pair<Stop, Route>>) {
	+
	+
	+ }
	+
	+ private fun setNoStopsLayout() {
	+ messageTextView!!.setVisibility(View.VISIBLE)
	+ messageTextView!!.setText(R.string.no_stops_nearby)
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ }
	+
	+ /**
	+ * Does exactly what is says on the tin
	+ */
	+ private fun showRecyclerHidingLoadMessage() {
	+ if (gridRecyclerView.getVisibility() != View.VISIBLE) {
	+ circlingProgressBar!!.setVisibility(View.GONE)
	+ loadingTextView!!.setVisibility(View.GONE)
	+ gridRecyclerView.setVisibility(View.VISIBLE)
	+ }
	+ messageTextView!!.setVisibility(View.GONE)
	+ } /*
	+ * Local locationListener, to use for the GPS
	+ */
	+ /*
	+ class FragmentLocationListener implements LocationListenerCompat {
	+
	+ private long lastUpdateTime = -1;
	+ public boolean isRegistered = false;
	+
	+ @Override
	+ public void onLocationChanged(@NonNull Location location) {
	+ if(viewModel==null){
	+ return;
	+ }
	+ if(location.getAccuracy()<200) {
	+
	+ lastPosition = new GPSPoint(location.getLatitude(), location.getLongitude());
	+ //viewModel.requestStopsAtDistance(location.getLatitude(), location.getLongitude(), distance, true);
	+ viewModel.setLastLocation(location);
	+ }
	+ lastUpdateTime = System.currentTimeMillis();
	+ //Log.d("BusTO:NearPositListen","can start request for stops: "+ !dbUpdateRunning);
	+ }
	+
	+ @Override
	+ public void onProviderEnabled(@NonNull String provider) {
	+ Log.d(DEBUG_TAG, "Location provider "+provider+" enabled");
	+ if(provider.equals(LocationManager.GPS_PROVIDER)){
	+ setShowingStatus(LocationShowingStatus.SEARCHING);
	+ }
	+ }
	+
	+ @Override
	+ public void onProviderDisabled(@NonNull String provider) {
	+ Log.d(DEBUG_TAG, "Location provider "+provider+" disabled");
	+ if(provider.equals(LocationManager.GPS_PROVIDER)) {
	+ setShowingStatus(LocationShowingStatus.DISABLED);
	+ }
	+ }
	+
	+ @Override
	+ public void onStatusChanged(@NonNull String provider, int status, @Nullable Bundle extras) {
	+ LocationListenerCompat.super.onStatusChanged(provider, status, extras);
	+ }
	+ }
	+
	+ */
	+
	+ companion object {
	+ private const val DEBUG_TAG = "NearbyStopsFragment"
	+ private const val FRAGMENT_TYPE_KEY = "FragmentType"
	+ const val FRAGMENT_TAG: String = "NearbyStopsFrag"
	+
	+ const val COLUMN_WIDTH_DP: Int = 250
	+
	+
	+ /**
	+ * Use this factory method to create a new instance of
	+ * this fragment using the provided parameters.
	+ * @return A new instance of fragment NearbyStopsFragment.
	+ */
	+ @JvmStatic
	+ fun newInstance(type: FragType): NearbyStopsFragment {
	+ //if(fragmentType != TYPE_STOPS && fragmentType != TYPE_ARRIVALS )
	+ // throw new IllegalArgumentException("WRONG KIND OF FRAGMENT USED");
	+ val fragment = NearbyStopsFragment()
	+ val args = Bundle(1)
	+ args.putInt(FRAGMENT_TYPE_KEY, type.num)
	+ fragment.setArguments(args)
	+ return fragment
	+ }
	+ }
	+}
	diff --git a/app/src/main/java/it/reyboz/bustorino/fragments/ParentFragmentManagerFromChild.kt b/app/src/main/java/it/reyboz/bustorino/fragments/ParentFragmentManagerFromChild.kt
	new file mode 100644
	--- /dev/null
	+++ b/app/src/main/java/it/reyboz/bustorino/fragments/ParentFragmentManagerFromChild.kt
	@@ -0,0 +1,9 @@
	+package it.reyboz.bustorino.fragments
	+
	+
	+interface ParentFragmentManagerFromChild {
	+
	+ fun needToPopMainStackOnBack() : Boolean
	+
	+ fun setMainFragmentManagerTransition(yes: Boolean)
	+}
	\ No newline at end of file
	diff --git a/app/src/main/java/it/reyboz/bustorino/util/RoutePositionSorter.java b/app/src/main/java/it/reyboz/bustorino/util/RoutePositionSorter.java
	--- a/app/src/main/java/it/reyboz/bustorino/util/RoutePositionSorter.java
	+++ b/app/src/main/java/it/reyboz/bustorino/util/RoutePositionSorter.java
	@@ -17,21 +17,19 @@
	*/
	package it.reyboz.bustorino.util;

	-import android.location.Location;
	import androidx.core.util.Pair;
	import android.util.Log;

	import it.reyboz.bustorino.backend.*;

	-import java.time.ZonedDateTime;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.List;

	-public class RoutePositionSorter implements Comparator<Pair<Stop, Route>> {
	+public class RoutePositionSorter implements Comparator<RouteWithStop> {
	private final double latPos, longPos;
	- private final double minutialmetro = 6.0/100; //v = 5km/h
	- private final double distancemultiplier = 2./3;
	+ public final double MINUTI_PER_METRO = 6.0/100; //v = 5km/h
	+ public final double DISTANCE_MULTIPLIER = 2./3;
	public RoutePositionSorter(double latitude, double longitude){
	latPos = latitude;
	longPos = longitude;
	@@ -41,16 +39,16 @@
	}

	@Override
	- public int compare(Pair<Stop, Route> pair1, Pair<Stop, Route> pair2) throws NullPointerException{
	+ public int compare(RouteWithStop pair1, RouteWithStop pair2) throws NullPointerException{
	int delta = 0;
	- final Stop stop1 = pair1.first, stop2 = pair2.first;
	+ final Stop stop1 = pair1.getStop(), stop2 = pair2.getStop();
	double dist1 = utils.measuredistanceBetween(latPos,longPos,
	stop1.getLatitude(),stop1.getLongitude());
	double dist2 = utils.measuredistanceBetween(latPos,longPos,
	stop2.getLatitude(),stop2.getLongitude());
	- final List<Passaggio> passaggi1 = pair1.second.passaggi,
	- passaggi2 = pair2.second.passaggi;
	- if(passaggi1.size()<=0 \|\| passaggi2.size()<=0){
	+ final List<Passaggio> passaggi1 = pair1.getRoute().passaggi,
	+ passaggi2 = pair2.getRoute().passaggi;
	+ if(passaggi1.isEmpty() \|\| passaggi2.isEmpty()){
	Log.e("ArrivalsStopAdapter","Cannot compare: No arrivals in one of the stops");
	} else {
	Collections.sort(passaggi1);
	@@ -66,7 +64,7 @@

	delta = (int) passaggi1.get(0).getDifferenceMinutes(passaggi2.get(0));
	}
	- delta += (int)((dist1 -dist2)minutialmetrodistancemultiplier);
	+ delta += (int)((dist1 -dist2)* MINUTI_PER_METRO * DISTANCE_MULTIPLIER);
	return delta;
	}

	diff --git a/app/src/main/java/it/reyboz/bustorino/viewmodels/LinesGridShowingViewModel.kt b/app/src/main/java/it/reyboz/bustorino/viewmodels/LinesGridShowingViewModel.kt
	--- a/app/src/main/java/it/reyboz/bustorino/viewmodels/LinesGridShowingViewModel.kt
	+++ b/app/src/main/java/it/reyboz/bustorino/viewmodels/LinesGridShowingViewModel.kt
	@@ -77,7 +77,12 @@
	}

	fun setFavoritesLinesIDs(linesIds: HashSet<String>){
	- favoritesLinesIDs.value = linesIds
	+ val sameSet = favoritesLinesIDs.value?.let{
	+ linesIds.containsAll(it) && it.containsAll(linesIds)
	+ } ?: false
	+ if(!sameSet)// trigger LiveData
	+ favoritesLinesIDs.value = linesIds
	+
	}


	diff --git a/app/src/main/java/it/reyboz/bustorino/viewmodels/NearbyStopsViewModel.kt b/app/src/main/java/it/reyboz/bustorino/viewmodels/NearbyStopsViewModel.kt
	--- a/app/src/main/java/it/reyboz/bustorino/viewmodels/NearbyStopsViewModel.kt
	+++ b/app/src/main/java/it/reyboz/bustorino/viewmodels/NearbyStopsViewModel.kt
	@@ -23,19 +23,145 @@
	import androidx.lifecycle.AndroidViewModel
	import androidx.lifecycle.MediatorLiveData
	import androidx.lifecycle.MutableLiveData
	+import androidx.lifecycle.map
	+import androidx.lifecycle.viewModelScope
	+import com.android.volley.Response
	import it.reyboz.bustorino.BuildConfig
	-import it.reyboz.bustorino.backend.GPSPoint
	-import it.reyboz.bustorino.backend.Stop
	+import it.reyboz.bustorino.backend.*
	+import it.reyboz.bustorino.backend.mato.MapiArrivalRequest
	import it.reyboz.bustorino.data.OldDataRepository
	-import java.util.ArrayList
	+import it.reyboz.bustorino.util.StopSorterByDistance
	+import kotlinx.coroutines.Dispatchers
	+import kotlinx.coroutines.Job
	+import kotlinx.coroutines.delay
	+import kotlinx.coroutines.launch
	+import java.util.*
	+import java.util.concurrent.ConcurrentHashMap
	import java.util.concurrent.Executors
	+import java.util.concurrent.atomic.AtomicInteger
	+import java.util.concurrent.atomic.AtomicLong
	+import kotlin.time.Duration.Companion.seconds

	class NearbyStopsViewModel(application: Application): AndroidViewModel(application) {

	private val executor = Executors.newFixedThreadPool(2)
	private val oldRepo = OldDataRepository(executor, application)

	+ val arrivalsNearby = MutableLiveData<List<Palina>>()

	+ // map of arrivals by stopID
	+ private val arrivalsMapStopID = ConcurrentHashMap<String, Palina>()
	+
	+ val progressPerc = MutableLiveData<Int>()
	+
	+ val downloadingArrivals = MutableLiveData<Boolean>()
	+ val lastTimeFinished = AtomicLong(0)
	+ private var job : Job? = null
	+
	+ /*private val arrivalsListener = object : NearbyArrivalsDownloader.ArrivalsListener {
	+ override fun setProgress(completedRequests: Int, pendingRequests: Int) {
	+ val totalReq = completedRequests + pendingRequests
	+ progressPerc.postValue( (completedRequests * 100) / totalReq )
	+
	+ if(pendingRequests == 0)
	+ downloadingArrivals.postValue(false)
	+ }
	+
	+ override fun onAllRequestsCancelled() {
	+ downloadingArrivals.postValue(false)
	+ }
	+
	+ override fun showCompletedArrivals(completedPalinas: ArrayList<Palina>) {
	+ arrivalsNearby.postValue(completedPalinas)
	+ }
	+
	+ }
	+
	+ */
	+
	+ //private val nearbyArrivalsDownloader = NearbyArrivalsDownloader(application,arrivalsListener )
	+
	+ private val volleyManager = NetworkVolleyManager.getInstance(application)
	+
	+ /**
	+ * Response listener for the requests
	+ */
	+ private val responseListener = Response.Listener<Palina> { p ->
	+ val key = p.ID
	+ arrivalsMapStopID[key] = p
	+
	+ arrivalsNearby.postValue(arrivalsMapStopID.values.toList())
	+
	+ val c = completedRequests.incrementAndGet()
	+ val r = runningRequests.decrementAndGet()
	+ updateProgressPost(c,errorRequests.get(), totalReqs.get())
	+ if(r==0){
	+ setFinishedPost()
	+ }
	+ }
	+
	+ /**
	+ * Error listener for the requests
	+ */
	+ private val errorListener = Response.ErrorListener { error ->
	+ val e = errorRequests.incrementAndGet()
	+ val r = runningRequests.decrementAndGet()
	+ updateProgressPost(completedRequests.get(), e, totalReqs.get())
	+ if(r==0){
	+ setFinishedPost()
	+ }
	+ if(BuildConfig.DEBUG) Log.d(DEBUG_TAG,"query to palina, error "+ error.toString())
	+ }
	+
	+ private fun setFinishedPost(){
	+ downloadingArrivals.postValue(false)
	+ //val time = System.currentTimeMillis()
	+ //lastTimeFinished.set(time)
	+ job?.cancel()
	+ job = viewModelScope.launch {
	+ delay(30.seconds)
	+ launch(Dispatchers.Main) {
	+ Log.d(DEBUG_TAG, "Updating arrivals from job")
	+ stopsAtDistance.value?.let {
	+ requestArrivalsForStops(it)
	+ }
	+ }
	+ }
	+ }
	+
	+ private val totalReqs = AtomicInteger(0)
	+ private val completedRequests = AtomicInteger(0)
	+ private val errorRequests = AtomicInteger(0)
	+ private val runningRequests = AtomicInteger(0)
	+
	+ /**
	+ * Run new batch of requests
	+ */
	+ fun requestArrivalsForStops(stops: List<Stop>) {
	+ //nearbyArrivalsDownloader.requestArrivalsForStops(stops)
	+ if(runningRequests.get() > 0) {
	+ volleyManager.requestQueue.cancelAll(REQUEST_TAG)
	+ }
	+ val currentDate = Date()
	+ val timeRange = 3600
	+ val departures = 10
	+ totalReqs.set(stops.size)
	+ runningRequests.set(stops.size)
	+ completedRequests.set(0)
	+ errorRequests.set(0)
	+ arrivalsMapStopID.clear()
	+ for (s in stops) {
	+ val req = MapiArrivalRequest(s.ID, currentDate, timeRange, departures, responseListener, errorListener)
	+ req.setTag(REQUEST_TAG)
	+ volleyManager.addToRequestQueue(req)
	+ }
	+ downloadingArrivals.value = (true)
	+ }
	+ private fun updateProgressPost(completed: Int, error: Int, total: Int) {
	+ val done = completed + error
	+ progressPerc.postValue( (done * 100) / total )
	+ }
	+ //// ------- LOCATION STUFF ---------
	val locationLiveData = MutableLiveData<GPSPoint>()
	val distanceMtLiveData = MutableLiveData<Int>(40)

	@@ -150,7 +276,79 @@
	}


	+ val arrivalsDecoupled = arrivalsNearby.map { palinas ->
	+ locationLiveData.value?.let { loc ->
	+ Collections.sort(palinas, StopSorterByDistance(loc))
	+ }
	+
	+ var routesPairList = ArrayList<RouteWithStop>(10)
	+ //int maxNum = Math.min(MAX_STOPS, stopList.size());
	+ for (p in palinas) {
	+ //if there are no routes available, skip stop
	+ if (p.queryAllRoutes().isEmpty()) continue
	+ for (r in p.queryAllRoutes()) {
	+ //if there are no routes, should not do anything
	+ if (r.passaggi != null && !r.passaggi.isEmpty()) routesPairList.add(RouteWithStop(p, r))
	+ }
	+ }
	+
	+ val pos = locationLiveData.value
	+ if(pos != null) {
	+ routesPairList.sortWith { p1, p2 ->
	+ comparePairsRoutesArrivals(p1,p2,pos)
	+ }
	+ }
	+ routesPairList
	+ }
	+
	+ fun comparePairsRoutesArrivals(pair1: RouteWithStop, pair2: RouteWithStop, pos: GPSPoint) : Int{
	+ var delta = 0
	+ val stop1: Stop = pair1.stop
	+ val stop2: Stop = pair2.stop
	+
	+ val dist1 = utils.measuredistanceBetween(
	+ pos.latitude, pos.longitude,
	+ stop1.getLatitude()!!, stop1.getLongitude()!!
	+ )
	+ val dist2 = utils.measuredistanceBetween(
	+ pos.latitude, pos.longitude,
	+ stop2.getLatitude()!!, stop2.getLongitude()!!
	+ )
	+ val passaggi1 = pair1.route.passaggi
	+ val passaggi2 = pair2.route.passaggi
	+ if (passaggi1.size <= 0 \|\| passaggi2.size <= 0) {
	+ Log.e("ArrivalsStopAdapter", "Cannot compare: No arrivals in one of the stops")
	+ } else {
	+ Collections.sort(passaggi1)
	+ Collections.sort(passaggi2)
	+
	+ /*int deltaOre = passaggi1.get(0).hh-passaggi2.get(0).hh;
	+ if(deltaOre>12)
	+ deltaOre -= 24;
	+ else if (deltaOre<-12)
	+ deltaOre += 24;
	+ delta+=deltaOre*60 + passaggi1.get(0).mm-passaggi2.get(0).mm;
	+
	+ */
	+ delta = passaggi1[0]!!.getDifferenceMinutes(passaggi2[0]!!).toInt()
	+ }
	+ delta += ((dist1 - dist2) * MINUTI_PER_METRO * DISTANCE_MULTIPLIER).toInt()
	+
	+ return delta
	+
	+ }
	+
	+ override fun onCleared() {
	+ volleyManager.requestQueue.cancelAll(REQUEST_TAG)
	+ super.onCleared()
	+ }
	+
	companion object{
	private const val DEBUG_TAG = "BusTO-NearbyStopVwModel"
	+
	+ const val REQUEST_TAG: String = "NearbyArrivals"
	+
	+ const val MINUTI_PER_METRO: Double = 6.0 / 100 //v = 5km/h
	+ const val DISTANCE_MULTIPLIER: Double = 2.0 / 3
	}
	}
	\ No newline at end of file
	diff --git a/app/src/main/res/layout/fragment_main_screen.xml b/app/src/main/res/layout/fragment_main_screen.xml
	--- a/app/src/main/res/layout/fragment_main_screen.xml
	+++ b/app/src/main/res/layout/fragment_main_screen.xml
	@@ -41,7 +41,7 @@
	android:singleLine="true"
	app:layout_constraintTop_toTopOf="parent"
	app:layout_constraintStart_toStartOf="@id/leftGuide"
	- app:layout_constraintEnd_toEndOf="@id/rightGuide"
	+ app:layout_constraintEnd_toStartOf="@id/searchButton"
	>
	</EditText>

	@@ -59,17 +59,12 @@
	android:imeOptions="actionSearch"
	app:layout_constraintTop_toTopOf="parent"
	app:layout_constraintStart_toStartOf="@id/leftGuide"
	- app:layout_constraintEnd_toEndOf="@id/rightGuide"
	+ app:layout_constraintEnd_toStartOf="@id/searchButton"
	android:singleLine="true"
	android:visibility="gone">
	</EditText>
	- <androidx.constraintlayout.widget.Guideline
	- android:id="@+id/rightGuide"
	- android:layout_width="wrap_content"
	- android:layout_height="wrap_content"
	- android:orientation="vertical"
	- app:layout_constraintEnd_toStartOf="@id/searchButton"
	- />
	+
	+
	<ImageButton
	android:id="@+id/searchButton"
	style="?android:attr/borderlessButtonStyle"
	@@ -89,7 +84,7 @@
	android:layout_width="match_parent"
	android:layout_height="8dp"
	android:layout_below="@+id/QRButton"
	- android:layout_marginTop="3dp"
	+ android:layout_marginTop="5dp"
	android:layout_marginEnd="10dp"
	android:layout_marginStart="10dp"
	android:indeterminateOnly="true"
	@@ -99,16 +94,20 @@
	app:layout_constraintStart_toStartOf="parent"
	app:layout_constraintEnd_toEndOf="parent"
	/>
	-
	-
	+ <androidx.constraintlayout.widget.Barrier
	+ android:layout_width="wrap_content"
	+ android:layout_height="wrap_content"
	+ android:id="@+id/barrierSearch"
	+ app:barrierDirection="bottom"
	+ app:constraint_referenced_ids="searchButton,QRButton,busStopSearchByIDEditText,busStopSearchByNameEditText"
	+ />
	<androidx.coordinatorlayout.widget.CoordinatorLayout
	android:layout_width="match_parent"
	android:layout_height="0dp"
	android:id="@+id/coord_layout"
	android:layout_gravity="bottom\|end"
	- android:layout_below="@+id/searchButton"
	- android:layout_marginTop="8dp"
	- app:layout_constraintTop_toBottomOf="@id/searchButton"
	+ android:layout_marginTop="4dp"
	+ app:layout_constraintTop_toBottomOf="@id/barrierSearch"
	app:layout_constraintStart_toStartOf="parent"
	app:layout_constraintEnd_toEndOf="parent"
	app:layout_constraintBottom_toBottomOf="parent"
	@@ -116,21 +115,22 @@
	app:layout_constraintVertical_bias="0.0"
	>
	<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
	- android:id="@+id/listRefreshLayout"
	- android:layout_width="match_parent"
	- android:layout_height="match_parent"
	- android:layout_alignParentEnd="true"
	- android:layout_alignParentRight="true"
	- android:animateLayoutChanges="true"
	- android:visibility="gone">
	-
	- <FrameLayout
	+ android:id="@+id/listRefreshLayout"
	android:layout_width="match_parent"
	- android:id="@+id/resultFrame"
	- android:layout_height="fill_parent"
	- android:layout_marginTop="5dp"
	- android:layout_alignParentStart="true"/>
	+ android:layout_height="match_parent"
	+ android:layout_alignParentEnd="true"
	+ android:layout_alignParentRight="true"
	+ android:animateLayoutChanges="true"
	+ android:visibility="gone">
	+
	+ <FrameLayout
	+ android:layout_width="match_parent"
	+ android:id="@+id/resultFrame"
	+ android:layout_height="fill_parent"
	+ android:layout_marginTop="5dp"
	+ android:layout_alignParentStart="true"/>
	</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
	+
	<com.google.android.material.floatingactionbutton.FloatingActionButton
	android:id="@+id/floatingActionButton"
	android:layout_width="wrap_content"
	diff --git a/app/src/main/res/layout/fragment_nearby_stops.xml b/app/src/main/res/layout/fragment_nearby_stops.xml
	--- a/app/src/main/res/layout/fragment_nearby_stops.xml
	+++ b/app/src/main/res/layout/fragment_nearby_stops.xml
	@@ -39,8 +39,8 @@
	android:layout_below="@id/titleTextView"
	android:indeterminate="true"
	android:visibility="gone"
	- android:layout_marginStart="5dp"
	- android:layout_marginEnd="5dp"
	+ android:layout_marginStart="15dp"
	+ android:layout_marginEnd="15dp"
	/>


	@@ -71,7 +71,8 @@
	android:progressDrawable="@color/blue_620"
	android:indeterminate="true"
	android:indeterminateTint="@color/blue_620"
	- android:layout_below="@+id/titleTextView" android:layout_centerHorizontal="true"/>
	+ android:layout_below="@+id/titleTextView"
	+ android:layout_centerHorizontal="true"/>
	<TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
	android:id="@+id/positionLoadingTextView"
	android:layout_below="@id/circularProgressBar"

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