Added output format parser to the Route service.

It is possible now to choose between json and flatbuffers (not yet implemented) output format.
Only route service is supported atm.

include/engine/api/base_parameters.hpp

@@ -70,12 +70,19 @@ struct BaseParameters
         Any
     };
 
+    enum class OutputFormatType
+    {
+        JSON,
+        FLATBUFFERS
+    };
+
     std::vector<util::Coordinate> coordinates;
     std::vector<boost::optional<Hint>> hints;
     std::vector<boost::optional<double>> radiuses;
     std::vector<boost::optional<Bearing>> bearings;
     std::vector<boost::optional<Approach>> approaches;
     std::vector<std::string> exclude;
+    boost::optional<OutputFormatType> format = OutputFormatType::JSON;
 
     // Adds hints to response which can be included in subsequent requests, see `hints` above.
     bool generate_hints = true;

include/server/api/base_parameters_grammar.hpp

@@ -169,6 +169,11 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
             qi::lit("snapping=") >
             snapping_type[ph::bind(&engine::api::BaseParameters::snapping, qi::_r1) = qi::_1];
 
+        format_type.add(".json", engine::api::BaseParameters::OutputFormatType::JSON)
+        (".flatbuffers", engine::api::BaseParameters::OutputFormatType::FLATBUFFERS);
+
+        format_rule = -format_type[ph::bind(&engine::api::BaseParameters::format, qi::_r1) = qi::_1];
+
         exclude_rule = qi::lit("exclude=") >
                        (qi::as_string[+qi::char_("a-zA-Z0-9")] %
                         ',')[ph::bind(&engine::api::BaseParameters::exclude, qi::_r1) = qi::_1];
@@ -185,6 +190,9 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
   protected:
     qi::rule<Iterator, Signature> base_rule;
     qi::rule<Iterator, Signature> query_rule;
+    qi::rule<Iterator, Signature> format_rule;
+
+    qi::symbols<char, engine::api::BaseParameters::OutputFormatType> format_type;
 
     qi::real_parser<double, json_policy> double_;
 

include/server/api/route_parameters_grammar.hpp

@@ -42,7 +42,7 @@ struct RouteParametersGrammar : public BaseParametersGrammar<Iterator, Signature
               qi::bool_[ph::bind(&engine::api::RouteParameters::continue_straight, qi::_r1) =
                             qi::_1]));
 
-        root_rule = query_rule(qi::_r1) > -qi::lit(".json") >
+        root_rule = query_rule(qi::_r1) > BaseGrammar::format_rule(qi::_r1) >
                     -('?' > (route_rule(qi::_r1) | base_rule(qi::_r1)) % '&');
     }