ADD: added a redmine api exception

include/Redmine/Exception/Api.hpp

@@ -0,0 +1,94 @@
+#pragma once
+/* 
+* Copyright (C) 2024 Dominik Meyer
+*  
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*  
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*  
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @brief The main namespace of this library for Redmine related datatypes, classes, and functions
+ * 
+ */
+#include <stdexcept>
+#include <vector>
+namespace Redmine 
+{
+    /**
+     * @brief namespace for all exceptions
+     * 
+     */
+    namespace Exception 
+    {
+        
+        /**
+         * @brief exception returning all errors generated by an redmine api request
+         * 
+         */
+        class Api : public std::exception
+        {
+            private:
+
+                /// the overall exception msg
+                std::string msg_;
+
+                /// vector for storing all api errors of a request
+                std::vector<std::string> errors_;
+
+            public:
+
+            /**
+             * @brief constructor for just creating an exception
+             * 
+             * @param message 
+             */
+            explicit Api(const char* message) : msg_(message) {}
+            
+            /**
+             * @brief Constructor for creating an exception and add error messages
+             * 
+             * @param message 
+             * @param errors 
+             */
+            Api(const char* message, const std::vector<std::string> &errors) : 
+                msg_(message), errors_(errors) {}
+            
+            /**
+             * @brief add error to an existing exception
+             * 
+             * @param error 
+             */
+            void addError(const std::string &error) {errors_.push_back(error);}
+
+            /**
+             * @brief Return all errors of an exception
+             * 
+             * @return std::vector<std::string> 
+             */
+            std::vector<std::string> getErrors() const {return errors_;}
+
+            /**
+             * @brief return the what of an exception
+             * 
+             * @return const char* 
+             */
+            virtual const char* what() const noexcept {
+                    return msg_.c_str();
+            }
+
+            virtual ~Api() noexcept {}
+        }; // class Api
+
+    }; // namespace Exception
+
+}; // namespace Redmine