Return scenario buffer extents

using existing scenarioApplicationInfo field

Author: ansoncfit

src/main/java/com/conveyal/analysis/models/Bounds.java

@@ -35,4 +35,12 @@ public static Bounds fromWgsEnvelope (Envelope envelope) {
         return bounds;
     }
 
+    public String toJsonString (double factor) {
+        return String.format("\"north\": %f, \"south\": %f, \"east\": %f, \"west\": %f",
+                north / factor,
+                south / factor,
+                east / factor,
+                west / factor);
+    }
+
 }

src/main/java/com/conveyal/r5/analyst/scenario/Scenario.java

@@ -14,6 +14,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Comparator;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -153,6 +154,17 @@ public TransportNetwork applyToTransportNetwork (TransportNetwork originalNetwor
                 copiedNetwork.streetLayer.scenarioEdgesBoundingGeometry(TransitLayer.WALK_DISTANCE_LIMIT_METERS);
         copiedNetwork.transitLayer.buildDistanceTables(treeRebuildZone);
 
+        // Custom feature for Caltrans: applies mode-specific buffer distances around modifications (for now, only
+        // those that affect street layer)
+        if (this.affectsStreetLayer()) {
+            Map<String, Integer> buffersByMode = new HashMap<>();
+            buffersByMode.put("Walk", 7200);
+            buffersByMode.put("Bike", 24000);
+            buffersByMode.put("Transit", 50000);
+            buffersByMode.put("Car", 112000);
+            copiedNetwork.addScenarioBuffers(buffersByMode);
+        }
+
         // Find the transfers originating at or terminating at new stops.
         // TODO also rebuild transfers which are near street network changes but which do not connect to new stops.
         new TransferFinder(copiedNetwork).findTransfers();

src/main/java/com/conveyal/r5/transit/TransportNetwork.java

@@ -1,12 +1,15 @@
 package com.conveyal.r5.transit;
 
+import com.conveyal.analysis.models.Bounds;
 import com.conveyal.gtfs.GTFSFeed;
 import com.conveyal.osmlib.OSM;
 import com.conveyal.r5.analyst.LinkageCache;
 import com.conveyal.r5.analyst.WebMercatorGridPointSet;
 import com.conveyal.r5.analyst.cluster.TransportNetworkConfig;
 import com.conveyal.r5.analyst.error.TaskError;
 import com.conveyal.r5.analyst.fare.InRoutingFareCalculator;
+import com.conveyal.r5.analyst.scenario.Modification;
+import com.conveyal.r5.analyst.scenario.ModifyStreets;
 import com.conveyal.r5.analyst.scenario.Scenario;
 import com.conveyal.r5.common.JsonUtilities;
 import com.conveyal.r5.kryo.KryoNetworkSerializer;
@@ -32,6 +35,8 @@
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
+import static com.conveyal.r5.streets.VertexStore.FIXED_FACTOR;
+
 /**
  * This is a completely new replacement for Graph, Router etc.
  * It uses a lot less object pointers and can be built, read, and written orders of magnitude faster.
@@ -376,6 +381,16 @@ public TransportNetwork scenarioCopy(Scenario scenario) {
         return copy;
     }
 
+    public void addScenarioBuffers(Map<String, Integer> buffersByMode) {
+        List<String> bufferInfo = new ArrayList<>();
+        bufferInfo.add("Buffers for all modifications tied to street layer:");
+        buffersByMode.forEach((mode, distance) -> {
+            Envelope customExtents = streetLayer.scenarioEdgesBoundingGeometry(distance).getEnvelopeInternal();
+            bufferInfo.add(mode +"\n " + Bounds.fromWgsEnvelope(customExtents).toJsonString(FIXED_FACTOR));
+        });
+        this.scenarioApplicationInfo.add(new TaskError(new ModifyStreets(), bufferInfo));
+    }
+
     /**
      * FIXME why is this a long when crc32 returns an int?
      * @return a checksum of the graph, for use in verifying whether it changed or remained the same after