Access to location dependent data in Lua via way:get_location_tags()

features/options/extract/lua.feature

@@ -37,7 +37,8 @@ Feature: osrm-extract lua ways:get_nodes()
         """
         functions = require('testbot')
 
-        function way_function(profile, way, result, relations, location_data)
+        function way_function(profile, way, result, relations)
+           location_data = way:get_location_tags()
            assert(location_data)
            for k, v in pairs(location_data) do print (k .. ' ' .. tostring(v)) end
            result.forward_mode = mode.driving
@@ -67,7 +68,8 @@ Feature: osrm-extract lua ways:get_nodes()
         """
         functions = require('testbot')
 
-        function way_function(profile, way, result, relations, location_data)
+        function way_function(profile, way, result, relations)
+           location_data = way:get_location_tags()
            assert(location_data)
            print('ISO3166-1 ' .. (location_data['ISO3166-1'] or 'none'))
            result.forward_mode = mode.driving
@@ -101,7 +103,8 @@ Feature: osrm-extract lua ways:get_nodes()
         """
         functions = require('testbot')
 
-        function way_function(profile, way, result, relations, location_data)
+        function way_function(profile, way, result, relations)
+           location_data = way:get_location_tags()
            assert(location_data)
            for k, v in pairs(location_data) do print (k .. ' ' .. tostring(v)) end
            result.forward_mode = mode.driving

include/extractor/location_dependent_data.hpp

@@ -40,8 +40,6 @@ struct LocationDependentData
 
     properties_t operator()(const point_t &point) const;
 
-    properties_t operator()(const osmium::Way &way) const;
-
   private:
     void loadLocationDependentData(const boost::filesystem::path &file_path);
 

profiles/bicycle.lua

@@ -550,7 +550,7 @@ function process_way(profile, way, result)
     WayHandlers.weights
   }
 
-  WayHandlers.run(profile,way,result,data,handlers)
+  WayHandlers.run(profile, way, result, data, handlers)
 end
 
 function process_turn(profile, turn)

profiles/car.lua

@@ -303,7 +303,7 @@ function process_node(profile, node, result)
   end
 end
 
-function process_way(profile, way, result, relations, location_data)
+function process_way(profile, way, result, relations)
   -- the intial filtering of ways based on presence of tags
   -- affects processing times significantly, because all ways
   -- have to be checked.
@@ -387,8 +387,7 @@ function process_way(profile, way, result, relations, location_data)
     WayHandlers.weights
   }
 
-  print (profile, way, result, data, handlers, relations, location_data)
-  WayHandlers.run(profile, way, result, data, handlers, relations, location_data)
+  WayHandlers.run(profile, way, result, data, handlers, relations)
 end
 
 function process_turn(profile, turn)

profiles/foot.lua

@@ -243,7 +243,7 @@ function process_way(profile, way, result)
     WayHandlers.weights
   }
 
-  WayHandlers.run(profile,way,result,data,handlers)
+  WayHandlers.run(profile, way, result, data, handlers)
 end
 
 function process_turn (profile, turn)

profiles/lib/way_handlers.lua

@@ -552,16 +552,19 @@ function WayHandlers.blocked_ways(profile,way,result,data)
   end
 end
 
-function WayHandlers.driving_side(profile, way, result, data, relations, location_data)
+function WayHandlers.driving_side(profile, way, result, data)
    local driving_side = way:get_value_by_key("driving_side")
    if driving_side == 'left' then
       result.is_left_hand_driving = true
    elseif driving_side == 'right' then
       result.is_left_hand_driving = false
-   elseif location_data then
-      result.is_left_hand_driving = location_data['driving_side'] == 'left'
-   elseif profile.left_hand_driving then
-      result.is_left_hand_driving = true
+   else
+      location_data = way:get_location_tags()
+      if location_data and location_data['driving_side'] then
+         result.is_left_hand_driving = location_data['driving_side'] == 'left'
+      else
+         result.is_left_hand_driving = profile.left_hand_driving
+      end
    end
 end
 
@@ -580,13 +583,13 @@ end
 -- WayHandlers.run(handlers,way,result,data,profile)
 --
 -- Each method in the list will be called on the WayHandlers object.
--- All handlers must accept the parameteres (profile, way, result, data[, location_data]) and return false
+-- All handlers must accept the parameteres (profile, way, result, data, relations) and return false
 -- if the handler chain should be aborted.
 -- To ensure the correct order of method calls, use a Sequence of handler names.
 
-function WayHandlers.run(profile, way, result, data, handlers, relatons, location_data)
+function WayHandlers.run(profile, way, result, data, handlers, relations)
   for i,handler in ipairs(handlers) do
-    if handler(profile, way, result, data, relatons, location_data) == false then
+    if handler(profile, way, result, data, relations) == false then
       return false
     end
   end

src/extractor/location_dependent_data.cpp

@@ -265,20 +265,5 @@ LocationDependentData::properties_t LocationDependentData::operator()(const poin
 
     return result;
 }
-
-LocationDependentData::properties_t LocationDependentData::operator()(const osmium::Way &way) const
-{
-    // HEURISTIC: use a single node (last) of the way to localize the way
-    // For more complicated scenarios a proper merging of multiple tags
-    // at one or many locations must be provided
-    const auto &nodes = way.nodes();
-
-    // TODO: the next call requires an OSM file preprocessed with a command
-    //   osmium add-locations-to-ways --keep-untagged-nodes
-    const auto &location = nodes.back().location();
-    const point_t point(location.lon(), location.lat());
-
-    return operator()(point);
-}
 }
 }

src/extractor/scripting_environment_lua.cpp

@@ -42,6 +42,8 @@ namespace osrm
 namespace extractor
 {
 
+namespace
+{
 template <class T>
 auto get_value_by_key(T const &object, const char *key) -> decltype(object.get_value_by_key(key))
 {
@@ -80,6 +82,28 @@ template <class T> double lonToDouble(T const &object)
     return static_cast<double>(util::toFloating(object.lon));
 }
 
+// boost::variant visitor that inserts a key-value pair in a Lua table
+struct table_setter : public boost::static_visitor<>
+{
+    table_setter(sol::table &table, const std::string &key) : table(table), key(key) {}
+    template <typename T> void operator()(const T &value) const { table.set(key, value); }
+    void operator()(const boost::blank &) const { /* ignore */}
+
+    sol::table &table;
+    const std::string &key;
+};
+
+// Converts a properties map into a Lua table
+sol::table toLua(sol::state &state, const LocationDependentData::properties_t &properties)
+{
+    auto table = sol::table(state, sol::create);
+    std::for_each(properties.begin(), properties.end(), [&table](const auto &property) {
+        boost::apply_visitor(table_setter(table, property.first), property.second);
+    });
+    return table;
+}
+}
+
 Sol2ScriptingEnvironment::Sol2ScriptingEnvironment(
     const std::string &file_name,
     const std::vector<boost::filesystem::path> &location_dependent_data_paths)
@@ -285,10 +309,20 @@ void Sol2ScriptingEnvironment::InitContext(LuaScriptingContext &context)
         &get_value_by_key<osmium::Way>,
         "id",
         &osmium::Way::id,
+        "version",
+        &osmium::Way::version,
         "get_nodes",
         [](const osmium::Way &way) { return sol::as_table(way.nodes()); },
-        "version",
-        &osmium::Way::version);
+        "get_location_tags",
+        [&context](const osmium::Way &way) {
+            // HEURISTIC: use a single node (last) of the way to localize the way
+            // For more complicated scenarios a proper merging of multiple tags
+            // at one or many locations must be provided
+            const auto &nodes = way.nodes();
+            const auto &location = nodes.back().location();
+            return toLua(context.state,
+                         context.location_dependent_data({location.lon(), location.lat()}));
+        });
 
     context.state.new_usertype<osmium::RelationMember>(
         "RelationMember",
@@ -978,30 +1012,6 @@ void LuaScriptingContext::ProcessNode(const osmium::Node &node,
     }
 }
 
-namespace
-{
-// boost::variant visitor that inserts a key-value pair in a Lua table
-struct table_setter : public boost::static_visitor<>
-{
-    table_setter(sol::table &table, const std::string &key) : table(table), key(key) {}
-    template <typename T> void operator()(const T &value) const { table.set(key, value); }
-    void operator()(const boost::blank &) const { /* ignore */}
-
-    sol::table &table;
-    const std::string &key;
-};
-
-// Converts a properties map into a Lua table
-sol::table toLua(sol::state &state, const LocationDependentData::properties_t properties)
-{
-    auto table = sol::table(state, sol::create);
-    std::for_each(properties.begin(), properties.end(), [&table](const auto &property) {
-        boost::apply_visitor(table_setter(table, property.first), property.second);
-    });
-    return table;
-}
-}
-
 void LuaScriptingContext::ProcessWay(const osmium::Way &way,
                                      ExtractionWay &result,
                                      const ExtractionRelationContainer::RelationList &relations)
@@ -1011,15 +1021,7 @@ void LuaScriptingContext::ProcessWay(const osmium::Way &way,
     switch (api_version)
     {
     case 3:
-        if (location_dependent_data.empty())
-        {
-            way_function(profile_table, way, result, relations);
-        }
-        else
-        {
-            way_function(
-                profile_table, way, result, relations, toLua(state, location_dependent_data(way)));
-        }
+        way_function(profile_table, way, result, relations);
         break;
     case 2:
         way_function(profile_table, way, result);