Add Config::write().

lib/include/config.hpp

@@ -72,12 +72,19 @@ public:
 
 public:
     /*!
-     *  @brief  Read and parse the configuration file.
+     *  @brief  Read and parse the configuration from file.
      *
      *  @since  0.1.0
      */
     void read();
 
+    /*!
+     *  @brief  Write configuration to file.
+     *
+     *  @since  0.1.0
+     */
+    void write() const;
+
     /*!
      *  @brief  Set a configuration setting.
      *

lib/include/fedipotato.hpp

@@ -46,6 +46,7 @@ public:
      *  * `std::runtime_error` (Directory not found)
      *  * `std::filesystem::filesystem_error` (Could not create directory)
      *  * `std::ifstream::failure` (Could not read from file)
+     *  * `std::ofstream::failure` (Could not write to file)
      *  * `nlohmann::detail::parse_error` (Could not parse file)
      *
      *  @param  application_name The name of your application. Influences the

lib/src/config.cpp

@@ -18,12 +18,14 @@
 #include "directories.hpp"
 
 #include <fstream>
+#include <iomanip>
 
 namespace FediPotato
 {
 
 using std::ifstream;
 using std::ofstream;
+using std::setw;
 
 Config::Config(const string_view application_name, const string_view filename)
     : _filename{filename}
@@ -36,10 +38,7 @@ void Config::read()
 {
     if (!fs::exists(_filepath))
     {
-        ofstream out{_filepath};
-        out.exceptions(ofstream::failbit | ofstream::badbit);
-        out << "{}";
-        out.close();
+        write();
     }
 
     ifstream file(_filepath);
@@ -53,4 +52,16 @@ void Config::read()
     file >> _configfile;
 }
 
+void Config::write() const
+{
+    ofstream file(_filepath);
+    if (file.fail() || file.bad())
+    {
+        throw std::ofstream::failure{
+            string("Could not read ") += _filepath, std::io_errc::stream};
+    }
+
+    file << setw(4) << _configfile << '\n';
+}
+
 } // namespace FediPotato