add third route

main.cpp

@@ -68,7 +68,50 @@ StringResponse HandleRequest(StringRequest&& req)
                  route.begin(),
                  route.begin() + k_MapsPattern.size()))
   {
+    ifstream stream("./config.json"s);
+    string config;
+    string buf;
 
+    while (std::getline(stream, buf))
+    {
+      config += buf;
+    }
+
+    string_view config_ref {config.begin(), config.end()};
+    auto parsed_config = json::parse(config_ref);
+    string_view map_id {route.begin() + k_MapsPattern.size() + 1, route.end()};
+    StringResponse res(http::status::ok, 1);
+    res.set(http::field::content_type, content_type::k_JSON);
+
+    const auto& maps = parsed_config.as_object().at("maps"sv).as_array();
+
+    const auto finded = find_if(maps.begin(), maps.end(), [&map_id](auto& elem) -> bool
+    {
+      const auto& value = elem.as_object().at("id"sv).as_string();
+
+      return value == map_id;
+    });
+
+    if (finded == maps.end())
+    {
+      StringResponse res(http::status::bad_request, 1);
+      res.set(http::field::content_type, content_type::k_JSON);
+      string body = "{\n"
+                    "  \"code\": \"mapNotFound\",\n"
+                    "  \"message\": \"Map not found\"\n"
+                    "}"s;
+      res.body() = body;
+      res.content_length(body.size());
+      res.keep_alive(true);
+
+      return res;
+    }
+
+    res.body() = json::serialize(*finded);
+    res.content_length(res.body().size());
+    res.keep_alive(true);
+
+    return res;
   }
   else
   {