Add functions to get positions of buses.

modules/libdata.php

@@ -112,4 +112,25 @@ function getLines(){
     return $lines;
 }
 
+function getPositionOfRoute($rt){
+    global $busposition;
+    $locations = array();
+    foreach ($busposition as $bus){
+        if($bus["routeid"] == $rt){
+            array_push($locations,array($bus["lat"],$bus["lon"]));
+        }
+    }
+    return $locations;
+}
+
+function getPositionOfLine($line){
+    $locations = array();
+    foreach(getRoutesOfLine($line) as $route){
+        foreach(getPositionOfRoute($route["id"]) as $pos){
+            array_push($locations,$pos);
+        }
+    }
+    return $locations;
+}
+
 ?>