From 851882f9552b5a697fc1ed141f89f9f7caa7349a Mon Sep 17 00:00:00 2001
From: Niklas Halle <niklas@niklashalle.net>
Date: Sun, 23 Aug 2020 14:55:31 +0200
Subject: prototype, not returning json yet

---
 src/main.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 55 insertions(+), 8 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 57e4686..58d5791 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,25 +1,72 @@
 #include <iostream>
+#include <functional>
+#include <unordered_map>
 
 #include "crow.h"
 
+#define NULL_STRING std::string("null")
+#define EMPTY_STRING std::string("")
+#define NO_SUCH_COMMAND std::string("no_such_command")
+
+typedef std::function<std::string(std::string const &arguments, std::string const &session,
+                                  void *payload)> handler_func;
+
+struct CommandHandler {
+    [[nodiscard]] std::string exec(std::string const &arguments, std::string const &session) const {
+        return func(arguments, session, payload);
+    }
+
+    handler_func func;
+    void *payload{nullptr};
+};
+
+std::string stopHandler(std::string const &arguments, std::string const &session, void *payload);
+std::string klingerHandler(std::string const &arguments, std::string const &session, void *payload);
+
+[[maybe_unused]] void decl_me_daddy(int not_an_int) { (void) not_an_int; }
+
 int main() {
     crow::SimpleApp app;
 
-    CROW_ROUTE(app, "/add_json")
+    // command --> handler
+    static std::unordered_map<std::string, CommandHandler> const commands{
+            {"stop", {stopHandler, &app}},
+            {"klinger", {klingerHandler}}
+    };
+
+    CROW_ROUTE(app, "/")
             .methods("POST"_method)
-                    ([](crow::request const &request) {
+                    ([&app](crow::request const &request) {
                         auto data = crow::json::load(request.body);
+
                         if (!data)
                             return crow::response(400);
-                        auto sum = data["a"].i() + data["b"].i();
-                        std::ostringstream os;
-                        os << sum;
-                        return crow::response{os.str()};
+
+                        std::string command = (data.count("command") ? data["command"].s() : NO_SUCH_COMMAND);
+                        std::string arguments = (data.count("arguments") ? data["arguments"].s() : EMPTY_STRING);
+                        std::string session = (data.count("session") ? data["session"].s() : NULL_STRING);
+
+                        if (auto itor = commands.find(command); itor != commands.end()) {
+                            auto handler = itor->second;
+                            return crow::response{handler.exec(arguments, session)};
+                        }
+
+                        return crow::response{"no such command!\n"};
                     });
 
     app.port(18080).multithreaded().run();
 
-    std::cout << "Hello, World\n" << std::endl;
+    std::cout << "Stopped successfully" << std::endl;
+}
+
+std::string klingerHandler(std::string const &arguments, std::string const &session, void *payload) {
+    return "Bonjour!";
+}
+
+std::string stopHandler(std::string const &arguments, std::string const &session, void *payload) {
+    auto app = (crow::SimpleApp*) payload;
+    app->stop();
+    return "stopped";
 }
 
-// curl -d '{"a":"5", "b":"12"}' -H "Content-Type: application/json" -X POST http://localhost:18080/add_json
+// curl -d '{"command":"klinger", "b":"12"}' -H "Content-Type: application/json" -X POST http://localhost:18080/
-- 
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