From e12263b8d2cc5c87aeaf2de857f814971cb9fddd Mon Sep 17 00:00:00 2001
From: Sander Speetjens <sander.speetjens@gmail.com>
Date: Thu, 22 Aug 2024 13:57:04 +0200
Subject: [PATCH] message parser

Add magic enum
Add function to parse commands
Add function to parse events
Add function to feed json input to there corresponding parse functions and return there result
---
 tools/CMakeLists.txt     |   8 +++
 tools/message_parser.cpp | 102 +++++++++++++++++++++++++++++++++++++++
 tools/message_parser.hpp |  29 +++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 tools/message_parser.cpp
 create mode 100644 tools/message_parser.hpp

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index a66182f..5a26030 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -1,6 +1,13 @@
 add_executable(server)
+
+include(FetchContent)
+
+FetchContent_Declare(magic_enum URL https://github.com/Neargye/magic_enum/releases/download/v0.9.5/magic_enum-v0.9.5.tar.gz)
+FetchContent_MakeAvailable(magic_enum)
+
 target_sources(server PRIVATE
     ${CMAKE_CURRENT_LIST_DIR}/main.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/message_parser.cpp
     ${CMAKE_CURRENT_LIST_DIR}/simulator_base.cpp
     ${CMAKE_CURRENT_LIST_DIR}/simulators.cpp
     ${CMAKE_CURRENT_LIST_DIR}/websocket.cpp
@@ -20,4 +27,5 @@ target_include_directories(server
 target_link_libraries(server PRIVATE
     UI
     Timer
+    magic_enum::magic_enum
 )
\ No newline at end of file
diff --git a/tools/message_parser.cpp b/tools/message_parser.cpp
new file mode 100644
index 0000000..f49ac8c
--- /dev/null
+++ b/tools/message_parser.cpp
@@ -0,0 +1,102 @@
+#include "message_parser.hpp"
+#include <magic_enum.hpp>
+
+extern Simulators g_simulators;
+
+std::string message_parser(std::string message)
+{
+    json j = message;
+    if (j.contains("command"))
+    {
+        return command_parser(j["command"]).dump();
+    }
+    else if (j.contains("event"))
+    {
+        event_handler(j["event"]);
+        return "";
+    }
+    else
+    {
+        return "";
+    }
+}
+
+json command_parser(json command)
+{
+    Command cmd = magic_enum::enum_cast<Command>(command["type"]).value_or(Command::end);
+
+    switch (cmd)
+    {
+        case Command::get_UI_element:
+        {
+            std::string id = command["id"];
+            return g_simulators.invoke_active_simulator()->get_UI_item(id)->to_json();
+        }
+        case Command::get_UI_elements:
+        {
+            return g_simulators.invoke_active_simulator()->get_UI_items();
+        }
+        case Command::switch_simulator:
+        {
+            std::string name = command["name"];
+            g_simulators.switch_simulator(name);
+            return "";
+        }
+        case Command::get_active_simulator_name:
+        {
+            json j;
+            j["name"] = g_simulators.active_simulator_name();
+            return j;
+        }
+        case Command::get_simulators:
+        {
+            json j;
+            j["simulators"] = g_simulators.list_simulators();
+            return j;
+        }
+        default:
+        {
+            return "";
+        }
+    }
+}
+
+void event_handler(json event)
+{
+    Event e = magic_enum::enum_cast<Event>(event["type"]).value_or(Event::end);
+
+    switch(e)
+    {
+        case Event::clicked:
+        {
+            std::string id = event["id"];
+            g_simulators.invoke_active_simulator()->get_UI_item(id)->click();
+            break;
+        }
+        case Event::value_changed:
+        {
+            std::string id = event["id"];
+            int value = event["value"];
+            g_simulators.invoke_active_simulator()->get_UI_item(id)->set_value(value);
+            break;
+        }
+        case Event::text_changed:
+        {
+            std::string id = event["id"];
+            std::string text = event["text"];
+            g_simulators.invoke_active_simulator()->get_UI_item(id)->set_text(text);
+            break;
+        }
+        case Event::selected:
+        {
+            std::string id = event["id"];
+            std::string selected = event["selected"];
+            g_simulators.invoke_active_simulator()->get_UI_item(id)->set_selected(selected);
+            break;
+        }
+        default:
+        {
+            break;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tools/message_parser.hpp b/tools/message_parser.hpp
new file mode 100644
index 0000000..de42f88
--- /dev/null
+++ b/tools/message_parser.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "simulators.hpp"
+
+enum class Command
+{
+    get_UI_element,
+    get_UI_elements,
+    switch_simulator,
+    get_active_simulator_name,
+    get_simulators,
+    end,
+    begin = 0
+};
+
+enum class Event
+{
+    clicked,
+    value_changed,
+    text_changed,
+    selected,
+    ui_changed,
+    end,
+    begin = 0
+};
+
+std::string message_parser(std::string message);
+json command_parser(json command);
+void event_handler(json event);
\ No newline at end of file