//checks whether an alert is within range
static int is_alert_in_range(const RoadMapGpsPosition *gps_position, const PluginLine *line){
int i;
int j;
unsigned int speed;
int distance; // will hold the distance of the alert
RoadMapPosition gps_pos;
int square;
int squares[9];
int count_squares;
const char * street_name; // the current street name.
char current_street_name[512];
RoadMapPosition context_save_pos;
zoom_t context_save_zoom;
int alert_index; // will hold the index in the provider of the alert
int priorities [] = {ALERTER_PRIORITY_HIGH,ALERTER_PRIORITY_MEDIUM,ALERTER_PRIORITY_LOW};
int num_priorities = sizeof(priorities)/sizeof(int);
int alert_providor_ind;
int square_ind = -1;
BOOL found_alert = FALSE;
gps_pos.latitude = gps_position->latitude;
gps_pos.longitude = gps_position->longitude;
roadmap_math_get_context(&context_save_pos, &context_save_zoom);
roadmap_math_set_context((RoadMapPosition *)&gps_pos, 20);
count_squares = roadmap_square_find_neighbours (&gps_pos, 0, squares);
// get the street infromation of the current position.
get_street_from_line(line->square,line->line_id, &street_name);
strncpy_safe (current_street_name, street_name, sizeof (current_street_name));
// go over priorities one by one from highest to lowest.
for (j=0; (j< num_priorities); j++){
if ( found_alert ) // Removed from the "for" condition due to some problem in android gcc AGA
break;
// loop all the providers for an alert
for (i = 0 ; ((i < RoadMapAlertProviders.count)&&(!found_alert)); i++){
// if provider doesn't have a high enough priority skip him, we'll get to him later.
if(RoadMapAlertProviders.provider[i]->get_priority()!=priorities[j])
continue;
/*
* If not enough distance has been passed from last check, provider can order to ignore
* if alert is active, always perform check, so distance will be updated
*/
if(!alert_should_be_visible){
if(!(* (RoadMapAlertProviders.provider[i]->distance_check))(gps_pos))
continue;
}
if ((* (RoadMapAlertProviders.provider[i]->is_square_dependent))()){
/*
* This provider has different alerts for each square, so we need to loop over all
* these squares and check. (Speed cams in tiles for example, as opposed to RealTimeAlerts).
*/
for (square = 0; ((square < count_squares)&&(!found_alert)); square++) {
roadmap_square_set_current(squares[square]);
if(is_alert_in_range_provider(RoadMapAlertProviders.provider[i],
gps_position, line, &alert_index,&distance, current_street_name))
{
square_ind = square;
alert_providor_ind = i;
found_alert = TRUE;
}
}
} else {
if(is_alert_in_range_provider(RoadMapAlertProviders.provider[i],
gps_position, line, &alert_index,&distance,current_street_name))
{
square_ind = -1;
alert_providor_ind = i;
found_alert = TRUE;
}
}
}
}
if(found_alert){
speed = (* (RoadMapAlertProviders.provider[alert_providor_ind]->get_speed))(alert_index);
// if driving speed is over the speed limit - it's an ALERT, otherwise it's a WARNING
if ((unsigned int)roadmap_math_to_speed_unit(gps_position->speed) < speed) {
the_active_alert.alert_type = WARN;
the_active_alert.distance_to_alert = distance;
the_active_alert.active_alert_id = (* (RoadMapAlertProviders.provider[alert_providor_ind]->get_id))(alert_index);
the_active_alert.alert_provider = alert_providor_ind;
if (square_ind != -1)
the_active_alert.square = squares[square_ind];
else
the_active_alert.square = line->square;
roadmap_math_set_context(&context_save_pos, context_save_zoom);
return TRUE;
}
else{
the_active_alert.alert_type = ALERT;
the_active_alert.distance_to_alert = distance;
the_active_alert.active_alert_id = (* (RoadMapAlertProviders.provider[alert_providor_ind]->get_id))(alert_index);
the_active_alert.alert_provider = alert_providor_ind;
if (square_ind != -1)
the_active_alert.square = squares[square_ind];
else
the_active_alert.square = line->square;
roadmap_math_set_context(&context_save_pos, context_save_zoom);
return TRUE;
}
}
roadmap_math_set_context(&context_save_pos, context_save_zoom);
return FALSE;
}
/**
* [IN] alert_position - the position of the alert
* [IN] alert_location_info - The old location_info of the alert. Will be updated if necessary
* [OUT] pNew_Info - the location_info of this alert, to be calculated.
* returns TRUE iff successful in finding relevant location info for this alert
* - D.F.
*/
BOOL get_alert_location_info(const RoadMapPosition *alert_position,roadmap_alerter_location_info *pNew_Info,
roadmap_alerter_location_info *alert_location_info){
int alert_square_time_stamp;
int layers_count;
int count;
int layers[128];
RoadMapNeighbour neighbours;
int square;
int context_save_zoom;
RoadMapPosition context_save_pos;
if (alert_location_info){
// check if this alert was tagged as invalid in the past - Could locate a street next to it, eventhough
// its tile already exists.
if (alert_location_info->square_id == ALERTER_SQUARE_ID_INVALID)
return FALSE;
// if alert info is already initialized and has an up to date timestamp, use its info.
if(alert_location_info->square_id!=ALERTER_SQUARE_ID_UNINITIALIZED){
alert_square_time_stamp = roadmap_square_version(alert_location_info->square_id);
if(alert_square_time_stamp==alert_location_info->time_stamp){
pNew_Info->line_id = alert_location_info->line_id;
pNew_Info->square_id = alert_location_info->square_id;
pNew_Info->time_stamp = alert_location_info->time_stamp;
return TRUE;
}
}
}
// did not return so far - so no cached valid location info was found, need to cacluate it.
layers_count = roadmap_layer_all_roads (layers, 128);
if (layers_count > 0) {
square = roadmap_tile_get_id_from_position(0,alert_position);
if(!roadmap_square_set_current(square)){
return FALSE; // do no have this alert's tile, return FALSE;
}
roadmap_math_get_context(&context_save_pos, &context_save_zoom);
roadmap_math_set_context((RoadMapPosition *)alert_position, 20);
count = roadmap_street_get_closest(alert_position, 0, layers, layers_count, 1, &neighbours, 1);
roadmap_math_set_context(&context_save_pos, context_save_zoom);
if(count>0&&neighbours.distance <= MAX_DISTANCE_FROM_ROAD){
// found valid information
pNew_Info->line_id = neighbours.line.line_id;
pNew_Info->square_id = neighbours.line.square;
pNew_Info->time_stamp = roadmap_square_version(pNew_Info->square_id);
}else{
// We have the alert's tile, yet still we could not locate it satisfactorily on
// a street. Tag this alert so it will not be checked in the future.
if(alert_location_info){
alert_location_info->square_id = ALERTER_SQUARE_ID_INVALID;
}
return FALSE;
}
}
if(alert_location_info){ // update the information of the alert, for future calls.
alert_location_info->line_id = pNew_Info->line_id;
alert_location_info->square_id = pNew_Info->square_id;
alert_location_info->time_stamp = pNew_Info->time_stamp;
}
return TRUE;
}
/**
* [IN] alert_position - the position of the alert
* [IN] alert_location_info - The old location_info of the alert. Will be updated if necessary
* [OUT] pNew_Info - the location_info of this alert, to be calculated.
* returns TRUE iff successful in finding relevant location info for this alert
* - D.F.
*/
BOOL get_alert_location_info(const RoadMapPosition *alert_position, int alert_streering, roadmap_alerter_location_info *pNew_Info,
roadmap_alerter_location_info *alert_location_info){
int alert_square_time_stamp;
int layers_count;
int count;
int layers[128];
RoadMapNeighbour neighbours[2];
int square;
zoom_t context_save_zoom;
RoadMapPosition context_save_pos;
if (alert_location_info){
// check if this alert was tagged as invalid in the past - Could locate a street next to it, eventhough
// its tile already exists.
if (alert_location_info->square_id == ALERTER_SQUARE_ID_INVALID)
return FALSE;
// if alert info is already initialized and has an up to date timestamp, use its info.
if(alert_location_info->square_id!=ALERTER_SQUARE_ID_UNINITIALIZED){
alert_square_time_stamp = roadmap_square_version(alert_location_info->square_id);
if(alert_square_time_stamp==alert_location_info->time_stamp){
pNew_Info->line_id = alert_location_info->line_id;
pNew_Info->square_id = alert_location_info->square_id;
pNew_Info->time_stamp = alert_location_info->time_stamp;
return TRUE;
}
}
}
// did not return so far - so no cached valid location info was found, need to cacluate it.
layers_count = roadmap_layer_all_roads (layers, 128);
if (layers_count > 0) {
square = roadmap_tile_get_id_from_position(0,alert_position);
if(!roadmap_square_set_current(square)){
return FALSE; // do no have this alert's tile, return FALSE;
}
roadmap_math_get_context(&context_save_pos, &context_save_zoom);
roadmap_math_set_context((RoadMapPosition *)alert_position, 2);
count = roadmap_street_get_closest(alert_position, 0, layers, layers_count, 1, &neighbours[0], 2);
roadmap_math_set_context(&context_save_pos, context_save_zoom);
if(count>0&&neighbours[0].distance <= MAX_DISTANCE_FROM_ROAD){
if (count > 1){
int direction;
roadmap_square_set_current(neighbours[0].line.line_id);
direction = roadmap_line_route_get_direction (neighbours[0].line.line_id, ROUTE_CAR_ALLOWED);
if (direction == ROUTE_DIRECTION_WITH_LINE || direction == ROUTE_DIRECTION_AGAINST_LINE){
int line_azymuth;
int delta;
if (direction == ROUTE_DIRECTION_WITH_LINE)
line_azymuth = roadmap_math_azymuth (&neighbours[0].from, &neighbours[0].to);
else
line_azymuth = roadmap_math_azymuth (&neighbours[0].to, &neighbours[0].from);
delta = azymuth_delta(line_azymuth, alert_streering);
if (delta > AZYMUTH_DELTA || delta < (0-AZYMUTH_DELTA)) {
pNew_Info->line_id = neighbours[1].line.line_id;
pNew_Info->square_id = neighbours[1].line.square;
pNew_Info->time_stamp = roadmap_square_version(pNew_Info->square_id);
}
else{
pNew_Info->line_id = neighbours[0].line.line_id;
pNew_Info->square_id = neighbours[0].line.square;
pNew_Info->time_stamp = roadmap_square_version(pNew_Info->square_id);
}
}
else{
pNew_Info->line_id = neighbours[0].line.line_id;
pNew_Info->square_id = neighbours[0].line.square;
pNew_Info->time_stamp = roadmap_square_version(pNew_Info->square_id);
}
}
else{
// found valid information
pNew_Info->line_id = neighbours[0].line.line_id;
pNew_Info->square_id = neighbours[0].line.square;
pNew_Info->time_stamp = roadmap_square_version(pNew_Info->square_id);
}
}else{
// We have the alert's tile, yet still we could not locate it satisfactorily on
// a street. Tag this alert so it will not be checked in the future.
if(alert_location_info){
alert_location_info->square_id = ALERTER_SQUARE_ID_INVALID;
}
return FALSE;
}
}
if(alert_location_info){ // update the information of the alert, for future calls.
alert_location_info->line_id = pNew_Info->line_id;
alert_location_info->square_id = pNew_Info->square_id;
alert_location_info->time_stamp = pNew_Info->time_stamp;
}
return TRUE;
}