1 files changed, 127 insertions, 0 deletions
diff --git a/src/config/config.cpp b/src/config/config.cpp
new file mode 100644
index 0000000..0f3d639
--- /dev/null
+++ b/src/config/config.cpp
@@ -0,0 +1,127 @@
+#include <config/config.hpp>
+#include <utils/tolower.hpp>
+
+#include <iostream>
+#include <cstring>
+
+#include <cstdlib>
+
+using namespace std::string_literals;
+
+extern char** environ;
+
+std::string Config::filename{};
+std::map<std::string, std::string> Config::values{};
+std::vector<t_config_changed_callback> Config::callbacks{};
+
+std::string Config::get(const std::string& option, const std::string& def)
+{
+  auto it = Config::values.find(option);
+
+  if (it == Config::values.end())
+    return def;
+  return it->second;
+}
+
+int Config::get_int(const std::string& option, const int& def)
+{
+  std::string res = Config::get(option, "");
+  if (!res.empty())
+    return std::atoi(res.c_str());
+  else
+    return def;
+}
+
+void Config::set(const std::string& option, const std::string& value, bool save)
+{
+  Config::values[option] = value;
+  if (save)
+    {
+      Config::save_to_file();
+      Config::trigger_configuration_change();
+    }
+}
+
+void Config::connect(const t_config_changed_callback& callback)
+{
+    Config::callbacks.push_back(callback);
+}
+
+void Config::clear()
+{
+  Config::values.clear();
+}
+
+/**
+ * Private methods
+ */
+void Config::trigger_configuration_change()
+{
+  std::vector<t_config_changed_callback>::iterator it;
+  for (it = Config::callbacks.begin(); it < Config::callbacks.end(); ++it)
+      (*it)();
+}
+
+bool Config::read_conf(const std::string& name)
+{
+  if (!name.empty())
+    Config::filename = name;
+
+  std::ifstream file(Config::filename.data());
+  if (!file.is_open())
+    {
+      std::cerr << "Error while opening file " << filename << " for reading: " << strerror(errno) << std::endl;
+      return false;
+    }
+
+  Config::clear();
+
+  auto parse_line = [](const std::string& line, const bool env)
+  {
+    static const auto env_option_prefix = "BIBOUMI_"s;
+
+    if (line == "" || line[0] == '#')
+      return;
+    size_t pos = line.find('=');
+    if (pos == std::string::npos)
+      return;
+    std::string option = line.substr(0, pos);
+    std::string value = line.substr(pos+1);
+    if (env)
+      {
+        auto a = option.substr(0, env_option_prefix.size());
+        if (a == env_option_prefix)
+          option = utils::tolower(option.substr(env_option_prefix.size()));
+        else
+          return;
+      }
+    Config::values[option] = value;
+  };
+
+  std::string line;
+  while (file.good())
+    {
+      std::getline(file, line);
+      parse_line(line, false);
+    }
+
+  char** env_line = environ;
+  while (*env_line)
+    {
+      parse_line(*env_line, true);
+      env_line++;
+    }
+  return true;
+}
+
+void Config::save_to_file()
+{
+  std::ofstream file(Config::filename.data());
+  if (file.fail())
+    {
+      std::cerr << "Could not save config file." << std::endl;
+      return ;
+    }
+  for (const auto& it: Config::values)
+    file << it.first << "=" << it.second << '\n';
+}