Refactor isThroughStreet/Intersection options (#4751)

* refactor isThroughStreet 
* refactor HaveIdenticalName
* fix a typo in the unit tests

include/extractor/guidance/have_identical_names.hpp

@@ -0,0 +1,27 @@
+#ifndef OSRM_EXTRACTOR_GUIDANCE_HAVE_IDENTICAL_NAMES_HPP_
+#define OSRM_EXTRACTOR_GUIDANCE_HAVE_IDENTICAL_NAMES_HPP_
+
+#include "extractor/guidance/constants.hpp"
+#include "extractor/suffix_table.hpp"
+#include "util/name_table.hpp"
+
+namespace osrm
+{
+namespace extractor
+{
+namespace guidance
+{
+
+// check if two name ids can be seen as identical (in presence of refs/others)
+// in our case this translates into no name announcement in either direction (lhs->rhs and
+// rhs->lhs)
+bool HaveIdenticalNames(const NameID lhs,
+                        const NameID rhs,
+                        const util::NameTable &name_table,
+                        const SuffixTable &street_name_suffix_table);
+
+} // namespace guidance
+} // namespace extractor
+} // namespace osrm
+
+#endif /*OSRM_EXTRACTOR_GUIDANCE_HAVE_IDENTICAL_NAMES_HPP_*/

include/extractor/guidance/intersection.hpp

@@ -293,10 +293,11 @@ struct IntersectionView final : std::vector<IntersectionViewData>,      //
 };
 
 // `Intersection` is a relative view of an intersection by an incoming edge.
-// `Intersection` are streets at an intersection ordered from from sharp right counter-clockwise to
+// `Intersection` are streets at an intersection stored as an ordered list of connected roads
+// ordered from sharp right counter-clockwise to
 // sharp left where `intersection[0]` is _always_ a u-turn
 
-// An intersection is an ordered list of connected roads ordered from from sharp right
+// An intersection is an ordered list of connected roads ordered from sharp right
 // counter-clockwise to sharp left where `intersection[0]` is always a u-turn
 //
 //                                           |

include/extractor/guidance/intersection_handler.hpp

@@ -96,9 +96,6 @@ class IntersectionHandler
                             const std::size_t begin,
                             const std::size_t end) const;
 
-    // Checks the intersection for a through street connected to `intersection[index]`
-    bool isThroughStreet(const std::size_t index, const Intersection &intersection) const;
-
     // See `getNextIntersection`
     struct IntersectionViewAndNode final
     {

include/extractor/guidance/is_through_street.hpp

@@ -0,0 +1,63 @@
+#ifndef OSRM_EXTRACTOR_GUIDANCE_IS_THROUGH_STREET_HPP_
+#define OSRM_EXTRACTOR_GUIDANCE_IS_THROUGH_STREET_HPP_
+
+#include "extractor/guidance/constants.hpp"
+#include "extractor/suffix_table.hpp"
+#include "util/guidance/name_announcements.hpp"
+
+using osrm::util::angularDeviation;
+
+namespace osrm
+{
+namespace extractor
+{
+namespace guidance
+{
+
+template <typename IntersectionType>
+inline bool isThroughStreet(const std::size_t index,
+                            const IntersectionType &intersection,
+                            const util::NodeBasedDynamicGraph &node_based_graph,
+                            const EdgeBasedNodeDataContainer &node_data_container,
+                            const util::NameTable &name_table,
+                            const SuffixTable &street_name_suffix_table)
+{
+
+    const auto &data_at_index = node_data_container.GetAnnotation(
+        node_based_graph.GetEdgeData(intersection[index].eid).annotation_data);
+
+    if (data_at_index.name_id == EMPTY_NAMEID)
+        return false;
+
+    // a through street cannot start at our own position -> index 1
+    for (std::size_t road_index = 1; road_index < intersection.size(); ++road_index)
+    {
+        if (road_index == index)
+            continue;
+
+        const auto &road = intersection[road_index];
+        const auto &road_data = node_data_container.GetAnnotation(
+            node_based_graph.GetEdgeData(road.eid).annotation_data);
+
+        // roads have a near straight angle (180 degree)
+        const bool is_nearly_straight = angularDeviation(road.angle, intersection[index].angle) >
+                                        (STRAIGHT_ANGLE - FUZZY_ANGLE_DIFFERENCE);
+
+        const bool have_same_name = HaveIdenticalNames(
+            data_at_index.name_id, road_data.name_id, name_table, street_name_suffix_table);
+
+        const bool have_same_category =
+            node_based_graph.GetEdgeData(intersection[index].eid).flags.road_classification ==
+            node_based_graph.GetEdgeData(road.eid).flags.road_classification;
+
+        if (is_nearly_straight && have_same_name && have_same_category)
+            return true;
+    }
+    return false;
+}
+
+} // namespace guidance
+} // namespace extractor
+} // namespace osrm
+
+#endif /*OSRM_EXTRACTOR_GUIDANCE_IS_THROUGH_STREET_HPP_*/

include/extractor/guidance/mergable_road_detector.hpp

@@ -3,6 +3,7 @@
 
 #include "extractor/compressed_edge_container.hpp"
 #include "extractor/guidance/coordinate_extractor.hpp"
+#include "extractor/guidance/have_identical_names.hpp"
 #include "extractor/guidance/intersection.hpp"
 #include "extractor/guidance/turn_lane_types.hpp"
 #include "extractor/restriction_index.hpp"
@@ -78,11 +79,6 @@ class MergableRoadDetector
     bool IsDistinctFrom(const MergableRoadData &lhs, const MergableRoadData &rhs) const;
 
   private:
-    // check if two name ids can be seen as identical (in presence of refs/others)
-    // in our case this translates into no name announcement in either direction (lhs->rhs and
-    // rhs->lhs)
-    bool HaveIdenticalNames(const NameID lhs, const NameID rhs) const;
-
     // When it comes to merging roads, we need to find out if two ways actually represent the
     // same road. This check tries to identify roads which are the same road in opposite directions
     bool EdgeDataSupportsMerge(const NodeBasedEdgeClassification &lhs_flags,

include/extractor/guidance/motorway_handler.hpp

@@ -3,6 +3,7 @@
 
 #include "extractor/guidance/intersection.hpp"
 #include "extractor/guidance/intersection_handler.hpp"
+#include "extractor/guidance/is_through_street.hpp"
 #include "extractor/query_node.hpp"
 
 #include "util/attributes.hpp"

include/extractor/guidance/roundabout_handler.hpp

@@ -5,6 +5,7 @@
 #include "extractor/guidance/coordinate_extractor.hpp"
 #include "extractor/guidance/intersection.hpp"
 #include "extractor/guidance/intersection_handler.hpp"
+#include "extractor/guidance/is_through_street.hpp"
 #include "extractor/guidance/roundabout_type.hpp"
 #include "extractor/query_node.hpp"
 

include/extractor/guidance/sliproad_handler.hpp

@@ -3,6 +3,7 @@
 
 #include "extractor/guidance/intersection.hpp"
 #include "extractor/guidance/intersection_handler.hpp"
+#include "extractor/guidance/is_through_street.hpp"
 #include "extractor/query_node.hpp"
 
 #include "util/name_table.hpp"
@@ -53,9 +54,6 @@ class SliproadHandler final : public IntersectionHandler
     // Next intersection from `start` onto `onto` is too far away for a Siproad scenario
     bool nextIntersectionIsTooFarAway(const NodeID start, const EdgeID onto) const;
 
-    // Through street: does a road continue with from's name at the intersection
-    bool isThroughStreet(const EdgeID from, const IntersectionView &intersection) const;
-
     // Does the road from `current` to `next` continue
     bool roadContinues(const EdgeID current, const EdgeID next) const;
 

include/extractor/guidance/turn_handler.hpp

@@ -3,6 +3,7 @@
 
 #include "extractor/guidance/intersection.hpp"
 #include "extractor/guidance/intersection_handler.hpp"
+#include "extractor/guidance/is_through_street.hpp"
 #include "extractor/query_node.hpp"
 
 #include "util/attributes.hpp"