initial

modules/chat_service/chat_client/include/ChatClient.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "MessageSession.hpp"
+#include "SendChatMessage.hpp"
+#include "ChatClientError.hpp"
+#include "models/ChatMessage.hpp"
+#include <functional>
+#include <string>
+
+namespace tw::chat {
+
+class ChatClient {
+    tw::MessageSession m_session;
+
+    std::function<void(ChatMessage)>                                      m_on_message;
+    std::function<void(tl::expected<void, ChatClientError>)>              m_on_send_response;
+    std::function<void(uint32_t, tl::expected<void, ChatClientError>)>    m_on_join_response;
+    std::function<void(uint32_t, tl::expected<void, ChatClientError>)>    m_on_leave_response;
+
+public:
+    ChatClient(const std::string& server_address, int16_t port);
+
+    void update();
+
+    tl::expected<void, ChatClientError> send_mesg(SendChatMessage message);
+
+    // Called for every broadcast message received on a subscribed channel.
+    void set_on_message(std::function<void(ChatMessage)> handler);
+
+    // Called when the server responds to send/join/leave requests.
+    // tl::expected holds void on success, ChatClientError on failure.
+    void set_on_send_response(std::function<void(tl::expected<void, ChatClientError>)> handler);
+    void set_on_join_response(std::function<void(uint32_t channel_id, tl::expected<void, ChatClientError>)> handler);
+    void set_on_leave_response(std::function<void(uint32_t channel_id, tl::expected<void, ChatClientError>)> handler);
+};
+
+}

modules/chat_service/chat_client/include/SendChatMessage.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+
+namespace tw::chat {
+
+struct SendChatMessage {
+    uint64_t channel_id;
+    std::string message;
+};
+
+}