Add NodeJS API for Approaches param.

Signed-off-by: FILLAU Jean-Maxime <jean-maxime.fillau@mapotempo.com>

include/nodejs/node_osrm_support.hpp

@@ -4,6 +4,7 @@
 #include "nodejs/json_v8_renderer.hpp"
 
 #include "osrm/bearing.hpp"
+#include "osrm/approach.hpp"
 #include "osrm/coordinate.hpp"
 #include "osrm/engine_config.hpp"
 #include "osrm/json_container.hpp"
@@ -297,6 +298,63 @@ inline bool argumentsToParameter(const Nan::FunctionCallbackInfo<v8::Value> &arg
         return false;
     }
 
+    if (obj->Has(Nan::New("approaches").ToLocalChecked()))
+    {
+        v8::Local<v8::Value> approaches = obj->Get(Nan::New("approaches").ToLocalChecked());
+        if (approaches.IsEmpty())
+            return false;
+
+        if (!approaches->IsArray())
+        {
+            Nan::ThrowError("Approaches must be an array of arrays of numbers");
+            return false;
+        }
+
+        auto approaches_array = v8::Local<v8::Array>::Cast(approaches);
+
+        if (approaches_array->Length() != params->coordinates.size())
+        {
+            Nan::ThrowError("Approaches array must have the same length as coordinates array");
+            return false;
+        }
+
+        for (uint32_t i = 0; i < approaches_array->Length(); ++i)
+        {
+            v8::Local<v8::Value> approach_raw = approaches_array->Get(i);
+            if (approach_raw.IsEmpty())
+                return false;
+
+            if (approach_raw->IsNull())
+            {
+                params->bearings.emplace_back();
+            }
+            else if (approach_raw->IsString())
+            {
+                const Nan::Utf8String approach_utf8str(approach_raw);
+                std::string approach_str{*approach_utf8str,
+                  *approach_utf8str + approach_utf8str.length()};
+                if (approach_str == "curb")
+                {
+                    params->approaches.push_back(osrm::Approach::CURB);
+                }
+                else if (approach_str == "unrestricted")
+                {
+                    params->approaches.push_back(osrm::Approach::UNRESTRICTED);
+                }
+                else
+                {
+                    Nan::ThrowError("'approach' param must be one of [curb, unrestricted]");
+                    return false; 
+                }
+            }
+            else
+            {
+                Nan::ThrowError("Approach must be a string: [curb, unrestricted] or null");
+                return false;
+            }
+        }
+    }
+
     if (obj->Has(Nan::New("bearings").ToLocalChecked()))
     {
         v8::Local<v8::Value> bearings = obj->Get(Nan::New("bearings").ToLocalChecked());

include/osrm/approach.hpp

@@ -0,0 +1,38 @@
+/*
+
+Copyright (c) 2016, Project OSRM contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list
+of conditions and the following disclaimer.
+Redistributions in binary form must reproduce the above copyright notice, this
+list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+#ifndef OSRM_APPROACH_HPP
+#define OSRM_APPROACH_HPP
+
+#include "engine/approach.hpp"
+
+namespace osrm
+{
+using engine::Approach;
+}
+
+#endif