From ac0c5c27e7af62b530a3eb18ebbd2be82706253a Mon Sep 17 00:00:00 2001
From: Patrick Niklaus <patrick.niklaus@student.kit.edu>
Date: Fri, 17 Mar 2017 15:19:56 +0000
Subject: [PATCH] First steps towards integrating MLD in node bindings

---
 include/nodejs/node_osrm_support.hpp | 28 ++++++++++++++++++++++++++++
 test/nodejs/index.js                 | 12 ++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/include/nodejs/node_osrm_support.hpp b/include/nodejs/node_osrm_support.hpp
index 2ddde9a36..6d905d93e 100644
--- a/include/nodejs/node_osrm_support.hpp
+++ b/include/nodejs/node_osrm_support.hpp
@@ -138,6 +138,34 @@ inline engine_config_ptr argumentsToEngineConfig(const Nan::FunctionCallbackInfo
         return engine_config_ptr();
     }
 
+    auto algorithm = params->Get(Nan::New("algorithm").ToLocalChecked());
+    if (algorithm->IsString())
+    {
+        auto algorithm_str = *v8::String::Utf8Value(Nan::To<v8::String>(algorithm).ToLocalChecked());
+        if (name == "CH")
+        {
+            engine_config->algorithm = EngineConfig::Algorithm::CH;
+        }
+        else if (name == "CoreCH")
+        {
+            engine_config->algorithm = EngineConfig::Algorithm::CoreCH;
+        }
+        else if (name == "MLD")
+        {
+            engine_config->algorithm = EngineConfig::Algorithm::MLD;
+        }
+        else
+        {
+            Nan::ThrowError("algorithm option must be one of 'CH', 'CoreCH', or 'MLD'.");
+            return engine_config_ptr();
+        }
+    }
+    else if (!algorithm->IsUndefined())
+    {
+        Nan::ThrowError("algorithm option must be a string and one of 'CH', 'CoreCH', or 'MLD'.");
+        return engine_config_ptr();
+    }
+
     return engine_config;
 }
 
diff --git a/test/nodejs/index.js b/test/nodejs/index.js
index 7cca6f93c..1b01d02c4 100644
--- a/test/nodejs/index.js
+++ b/test/nodejs/index.js
@@ -50,6 +50,18 @@ test('constructor: throws if given a non-string/obj argument', function(assert)
         /Parameter must be a path or options object/);
 });
 
+test('constructor: throws if given an unkown algorithm', function(assert) {
+    assert.plan(1);
+    assert.throws(function() { var osrm = new OSRM({algorithm: "Foo", shared_memory: true}); },
+        /algorithm option needs to be one of 'CH', 'CoreCH', or 'MLD'/);
+});
+
+test('constructor: throws if given an invalid algorithm', function(assert) {
+    assert.plan(1);
+    assert.throws(function() { var osrm = new OSRM({algorithm: 3, shared_memory: true}); },
+        /algorithm option needs to be a string and one of 'CH', 'CoreCH', or 'MLD'/);
+});
+
 require('./route.js');
 require('./trip.js');
 require('./match.js');