curl_exception: implement exception class to throw libcurl errors

CMakeLists.txt

@@ -18,11 +18,12 @@
 
 cmake_minimum_required(VERSION 3.16)
 cmake_policy(VERSION 3.16...3.27)
-project(dtranslatebot VERSION 0.3.3 LANGUAGES CXX)
+project(dtranslatebot VERSION 0.4.0 LANGUAGES CXX)
 include(GNUInstallDirs)
 
 # dtranslatebot Source files
 set(DTRANSLATEBOT_HEADERS
+    src/core/curl_exception.h
     src/core/database.h
     src/core/http_headers.h
     src/core/http_request.h
@@ -43,6 +44,7 @@ set(DTRANSLATEBOT_HEADERS
     src/translator/stub/stub.h
 )
 set(DTRANSLATEBOT_SOURCES
+    src/core/curl_exception.cpp
     src/core/database.cpp
     src/core/http_headers.cpp
     src/core/http_request.cpp

src/core/curl_exception.cpp

@@ -0,0 +1,30 @@
+/*****************************************************************************
+* dtranslatebot Discord Translate Bot
+* Copyright (C) 2026 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+*****************************************************************************/
+
+#include "curl_exception.h"
+using namespace bot::exception;
+
+curl_exception::curl_exception(const std::string &message, CURLcode error_code) : m_message(message), m_error_code(error_code) {
+}
+
+curl_exception::~curl_exception() noexcept {
+}
+
+const char* curl_exception::what() const noexcept {
+    return m_message.c_str();
+}

src/core/curl_exception.h

@@ -0,0 +1,41 @@
+/*****************************************************************************
+* dtranslatebot Discord Translate Bot
+* Copyright (C) 2026 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+*****************************************************************************/
+
+#ifndef CURL_EXCEPTION_H
+#define CURL_EXCEPTION_H
+
+#include <curl/curl.h>
+#include <exception>
+#include <string>
+
+namespace bot {
+    namespace exception {
+        class curl_exception : public std::exception {
+        public:
+            explicit curl_exception(const std::string &message, CURLcode error_code);
+            virtual ~curl_exception() noexcept;
+            const char* what() const noexcept override;
+
+        private:
+            const std::string m_message;
+            const CURLcode m_error_code;
+        };
+    }
+};
+
+#endif // CURL_EXCEPTION_H