add via waypoints support to mapbox directions

services-directions/src/main/java/com/mapbox/api/directions/v5/DirectionsService.java

@@ -46,6 +46,7 @@ public interface DirectionsService {
    * @param voiceUnits         voice units
    * @param exclude            exclude tolls, motorways or more along your route
    * @param approaches         which side of the road to approach a waypoint
+   * @param waypoints          which input coordinates should be treated as waypoints
    * @param waypointNames      custom names for waypoints used for the arrival instruction
    * @param waypointTargets    list of coordinate pairs for drop-off locations
    * @return the {@link DirectionsResponse} in a Call wrapper
@@ -73,6 +74,7 @@ Call<DirectionsResponse> getCall(
     @Query("voice_units") String voiceUnits,
     @Query("exclude") String exclude,
     @Query("approaches") String approaches,
+    @Query("waypoints") String waypoints,
     @Query("waypoint_names") String waypointNames,
     @Query("waypoint_targets") String waypointTargets
   );

services-directions/src/main/java/com/mapbox/api/directions/v5/MapboxDirections.java

@@ -1,6 +1,7 @@
 package com.mapbox.api.directions.v5;
 
 import android.support.annotation.FloatRange;
+import android.support.annotation.IntRange;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
@@ -91,6 +92,7 @@ protected Call<DirectionsResponse> initializeCall() {
       voiceUnits(),
       exclude(),
       approaches(),
+      waypoints(),
       waypointNames(),
       waypointTargets());
   }
@@ -359,6 +361,9 @@ private static String formatWaypointTargets(Point[] waypointTargets) {
   @Nullable
   abstract String approaches();
 
+  @Nullable
+  abstract String waypoints();
+
   @Nullable
   abstract String waypointNames();
 
@@ -419,6 +424,7 @@ public abstract static class Builder {
     private Point destination;
     private Point origin;
     private String[] approaches;
+    private Integer[] waypoints;
     private String[] waypointNames;
     private Point[] waypointTargets;
 
@@ -787,6 +793,26 @@ public Builder addApproaches(String... approaches) {
 
     abstract Builder approaches(@Nullable String approaches);
 
+    /**
+     * Optionally, set which input coordinates should be treated as waypoints.
+     * <p>
+     * Most useful in combination with  steps=true and requests based on traces
+     * with high sample rates. Can be an index corresponding to any of the input coordinates,
+     * but must contain the first ( 0 ) and last coordinates' index separated by  ; .
+     * {@link #steps()}
+     * </p>
+     *
+     * @param waypoints integer array of coordinate indices to be used as waypoints
+     * @return this builder for chaining options together
+     * @since 4.4.0
+     */
+    public Builder addWaypoints(@Nullable @IntRange(from = 0) Integer... waypoints) {
+      this.waypoints = waypoints;
+      return this;
+    }
+
+    abstract Builder waypoints(@Nullable String waypoints);
+
     /**
      * Custom names for waypoints used for the arrival instruction,
      * each separated by  ; . Values can be any string and total number of all characters cannot
@@ -845,6 +871,24 @@ public MapboxDirections build() {
           + " directions API request.");
       }
 
+      if (waypoints != null) {
+        if (waypoints.length < 2) {
+          throw new ServicesException(
+                  "Waypoints must be a list of at least two indexes separated by ';'");
+        }
+        if (waypoints[0] != 0 || waypoints[waypoints.length - 1] != coordinates.size() - 1) {
+          throw new ServicesException(
+                  "Waypoints must contain indices of the first and last coordinates"
+          );
+        }
+        for (int i = 1; i < waypoints.length - 1; i++) {
+          if (waypoints[i] < 0 || waypoints[i] >= coordinates.size()) {
+            throw new ServicesException(
+                    "Waypoints index too large (no corresponding coordinate)");
+          }
+        }
+      }
+
       if (waypointNames != null) {
         if (waypointNames.length != coordinates.size()) {
           throw new ServicesException("Number of waypoint names must match "
@@ -879,6 +923,7 @@ public MapboxDirections build() {
       bearing(TextUtils.formatBearing(bearings));
       annotation(TextUtils.join(",", annotations));
       radius(TextUtils.formatRadiuses(radiuses));
+      waypoints(TextUtils.join(";", waypoints));
 
       MapboxDirections directions = autoBuild();
 

services-directions/src/main/java/com/mapbox/api/directions/v5/models/RouteOptions.java

@@ -267,6 +267,9 @@ public static Builder builder() {
   @Nullable
   public abstract String approaches();
 
+  @Nullable
+  public abstract String waypoints();
+
   /**
    * Custom names for waypoints used for the arrival instruction in banners and voice instructions,
    * each separated by  ; . Values can be any string and total number of all characters cannot
@@ -541,6 +544,9 @@ public abstract Builder overview(
     @Nullable
     public abstract Builder approaches(String approaches);
 
+    @Nullable
+    public abstract Builder waypoints(@Nullable String indices);
+
     /**
      * The same waypoint names the user originally made when the request was made.
      *

services-directions/src/test/java/com/mapbox/api/directions/v5/MapboxDirectionsTest.java

@@ -655,6 +655,53 @@ public void testRouteOptionsApproaches() throws Exception {
     assertEquals("unrestricted;curb", approaches);
   }
 
+  @Test(expected = ServicesException.class)
+  public void build_exceptionThrownWhenLessThanTwoWaypointsProvided() {
+    MapboxDirections.builder()
+            .origin(Point.fromLngLat(2.0, 2.0))
+            .destination(Point.fromLngLat(4.0, 4.0))
+            .addWaypoints(0)
+            .baseUrl("https://foobar.com")
+            .accessToken(ACCESS_TOKEN)
+            .build();
+  }
+
+  @Test(expected = ServicesException.class)
+  public void build_exceptionThrownWhenWaypointsDoNotStartWith0() {
+    MapboxDirections.builder()
+            .origin(Point.fromLngLat(2.0, 2.0))
+            .addWaypoint(Point.fromLngLat(3.0, 3.0))
+            .destination(Point.fromLngLat(4.0, 4.0))
+            .addWaypoints(1, 2)
+            .baseUrl("https://foobar.com")
+            .accessToken(ACCESS_TOKEN)
+            .build();
+  }
+
+  @Test(expected = ServicesException.class)
+  public void build_exceptionThrownWhenWaypointDoNotEndWithLast() {
+    MapboxDirections.builder()
+            .origin(Point.fromLngLat(2.0, 2.0))
+            .addWaypoint(Point.fromLngLat(3.0, 3.0))
+            .destination(Point.fromLngLat(4.0, 4.0))
+            .addWaypoints(0, 1)
+            .baseUrl("https://foobar.com")
+            .accessToken(ACCESS_TOKEN)
+            .build();
+  }
+
+  @Test(expected = ServicesException.class)
+  public void build_exceptionThrownWhenMiddleWaypointsAreWrong() {
+    MapboxDirections.builder()
+            .origin(Point.fromLngLat(2.0, 2.0))
+            .addWaypoint(Point.fromLngLat(3.0, 3.0))
+            .destination(Point.fromLngLat(4.0, 4.0))
+            .addWaypoints(0, 3, 2)
+            .baseUrl("https://foobar.com")
+            .accessToken(ACCESS_TOKEN)
+            .build();
+  }
+
   @Test
   public void sanityWaypointNamesInstructions() throws Exception {
     MapboxDirections mapboxDirections = MapboxDirections.builder()