more robust check for parsed ways

profiles/foot.lua

@@ -102,32 +102,32 @@ function node_function (node)
 end
 
 function way_function (way)
- 	-- initial routability check, filters out buildings, boundaries, etc
+	-- initial routability check, filters out buildings, boundaries, etc
 	local highway = way.tags:Find("highway")
 	local route = way.tags:Find("route")
 	local man_made = way.tags:Find("man_made")
 	local railway = way.tags:Find("railway")
 	local amenity = way.tags:Find("amenity")
 	local public_transport = way.tags:Find("public_transport")
-    if (not highway or highway == '') and
+	if (not highway or highway == '') and
 		(not route or route == '') and
 		(not railway or railway=='') and
 		(not amenity or amenity=='') and
 		(not man_made or man_made=='') and
-    	(not public_transport or public_transport=='')
-    	then
-    	return 0
+		(not public_transport or public_transport=='')
+		then
+		return
     end
 
     -- don't route on ways that are still under construction
     if highway=='construction' then
-        return 0
+        return
     end
 
 	-- access
     local access = Access.find_access_tag(way, access_tags_hierachy)
     if access_tag_blacklist[access] then
-		return 0
+		return
     end
 
 	local name = way.tags:Find("name")
@@ -164,25 +164,31 @@ function way_function (way)
 		if durationIsValid(duration) then
 			way.duration = math.max( 1, parseDuration(duration) )
 		else
-		 	way.forward_speed = route_speeds[route]
+			way.forward_speed = route_speeds[route]
+			way.backward_speed = route_speeds[route]
 		end
 		way.forward_mode = mode_ferry
 		way.backward_mode = mode_ferry
 	elseif railway and platform_speeds[railway] then
 		-- railway platforms (old tagging scheme)
 		way.forward_speed = platform_speeds[railway]
+		way.backward_speed = platform_speeds[railway]
 	elseif platform_speeds[public_transport] then
 		-- public_transport platforms (new tagging platform)
 		way.forward_speed = platform_speeds[public_transport]
+		way.backward_speed = platform_speeds[public_transport]
 	elseif amenity and amenity_speeds[amenity] then
 		-- parking areas
 		way.forward_speed = amenity_speeds[amenity]
+		way.backward_speed = amenity_speeds[amenity]
 	elseif speeds[highway] then
 		-- regular ways
-      	way.forward_speed = speeds[highway]
+		way.forward_speed = speeds[highway]
+		way.backward_speed = speeds[highway]
 	elseif access and access_tag_whitelist[access] then
 	    -- unknown way, but valid access tag
 		way.forward_speed = walking_speed
+		way.backward_speed = walking_speed
     end
 
 	-- oneway
@@ -202,6 +208,4 @@ function way_function (way)
             way.backward_speed  = math.min(way.backward_speed, surface_speed)
         end
     end
-
-    return true
 end