Make a SettingsBag class that wraps the ini settings.

Easily allows to have default values for options
that are not specified in the loaded ini file.

src/CMakeLists.txt

@@ -27,6 +27,7 @@ add_executable(${PROJECT_NAME}
 	pathname/pathname.cpp
 	response_factory.cpp
 	list_highlight_langs.cpp
+	settings_bag.cpp
 )
 
 configure_file(

src/index_response.cpp

@@ -19,8 +19,8 @@
 #include <boost/algorithm/string/replace.hpp>
 
 namespace tawashi {
-	IndexResponse::IndexResponse (const IniFile& parIni) :
-		Response(Response::ContentType, "text/html", "index", parIni, false)
+	IndexResponse::IndexResponse (const SettingsBag& parSettings) :
+		Response(Response::ContentType, "text/html", "index", parSettings, false)
 	{
 	}
 } //namespace tawashi

src/index_response.hpp

@@ -23,7 +23,7 @@
 namespace tawashi {
 	class IndexResponse : public Response {
 	public:
-		explicit IndexResponse (const IniFile& parIni);
+		explicit IndexResponse (const SettingsBag& parSettings);
 
 	private:
 	};

src/main.cpp

@@ -25,7 +25,7 @@
 #include "safe_stack_object.hpp"
 #include "pathname/pathname.hpp"
 #include "duckhandy/compatibility.h"
-#include "duckhandy/lexical_cast.hpp"
+#include "settings_bag.hpp"
 #include <iostream>
 #include <string>
 #include <fstream>
@@ -52,8 +52,17 @@ namespace {
 	}
 
 	template <typename T>
-	std::unique_ptr<tawashi::Response> make_response (const tawashi::IniFile& parIni) {
-		return static_cast<std::unique_ptr<tawashi::Response>>(std::make_unique<T>(parIni));
+	std::unique_ptr<tawashi::Response> make_response (const tawashi::SettingsBag& parSettings) {
+		return static_cast<std::unique_ptr<tawashi::Response>>(std::make_unique<T>(parSettings));
+	}
+
+	void fill_defaults (tawashi::SettingsBag& parSettings) {
+		parSettings.add_default("redis_server", "127.0.0.1");
+		parSettings.add_default("redis_port", "6379");
+		parSettings.add_default("redis_mode", "sock");
+		parSettings.add_default("redis_sock", "/tmp/redis.sock");
+		parSettings.add_default("base_uri", "http://127.0.0.1");
+		parSettings.add_default("website_root", "html");
 	}
 } //unnamed namespace
 
@@ -72,8 +81,11 @@ int main() {
 	auto ini = SafeStackObject<tawashi::IniFile>(std::istream_iterator<char>(conf), std::istream_iterator<char>());
 	conf.close();
 
+	auto settings = SafeStackObject<tawashi::SettingsBag>(ini);
+	fill_defaults(*settings);
+
 	tawashi::cgi::Env cgi_env;
-	tawashi::ResponseFactory resp_factory(ini);
+	tawashi::ResponseFactory resp_factory(settings);
 	resp_factory.register_maker("index.cgi", &make_response<IndexResponse>);
 	resp_factory.register_maker("", &make_response<IndexResponse>);
 	resp_factory.register_maker("paste.cgi", &make_response<SubmitPasteResponse>);

src/pastie_response.cpp

@@ -23,8 +23,8 @@
 #include <sstream>
 
 namespace tawashi {
-	PastieResponse::PastieResponse (const IniFile& parIni) :
-		Response(Response::ContentType, "text/html", "", parIni, true),
+	PastieResponse::PastieResponse (const SettingsBag& parSettings) :
+		Response(Response::ContentType, "text/html", "", parSettings, true),
 		m_plain_text(false)
 	{
 	}

src/pastie_response.hpp

@@ -24,7 +24,7 @@
 namespace tawashi {
 	class PastieResponse : public Response {
 	public:
-		explicit PastieResponse (const IniFile& parIni);
+		explicit PastieResponse (const SettingsBag& parSettings);
 
 	private:
 		virtual void on_process() override;

src/response.cpp

@@ -17,7 +17,7 @@
 
 #include "response.hpp"
 #include "incredis/incredis.hpp"
-#include "ini_file.hpp"
+#include "settings_bag.hpp"
 #include "tawashiConfig.h"
 #include "duckhandy/stringize.h"
 #include "pathname/pathname.hpp"
@@ -43,28 +43,27 @@ namespace tawashi {
 		//	return path.substr(start_index, substr_len);
 		//}
 
-		std::string make_root_path (const IniFile::KeyValueMapType& parSettings) {
-			const auto it_found = parSettings.find("website_root");
-			if (parSettings.end() == it_found) {
+		std::string make_root_path (const SettingsBag& parSettings) {
+			auto retval = parSettings["website_root"];
+			if (retval.empty()) {
 				return "";
 			}
 			else {
-				mchlib::PathName retval(it_found->second);
-				return retval.path() + '/';
+				return mchlib::PathName(retval).path() + '/';
 			}
 		}
 
-		redis::IncRedis make_incredis (const tawashi::IniFile::KeyValueMapType& parSettings) {
+		redis::IncRedis make_incredis (const tawashi::SettingsBag& parSettings) {
 			using redis::IncRedis;
 
-			if (parSettings.at("redis_mode") == "inet") {
+			if (parSettings["redis_mode"] == "inet") {
 				return IncRedis(
-					std::string(parSettings.at("redis_server")),
-					dhandy::lexical_cast<uint16_t>(parSettings.at("redis_port"))
+					std::string(parSettings["redis_server"]),
+					dhandy::lexical_cast<uint16_t>(parSettings["redis_port"])
 				);
 			}
-			else if (parSettings.at("redis_mode") == "sock") {
-				return IncRedis(std::string(parSettings.at("redis_sock")));
+			else if (parSettings["redis_mode"] == "sock") {
+				return IncRedis(std::string(parSettings["redis_sock"]));
 			}
 			else {
 				throw std::runtime_error("Unknown setting for \"redis_mode\", valid settings are \"inet\" or \"sock\"");
@@ -99,17 +98,17 @@ namespace tawashi {
 		}
 	} //unnamed namespace
 
-	Response::Response (Types parRespType, std::string&& parValue, std::string&& parPageBaseName, const IniFile& parIni, bool parWantRedis) :
+	Response::Response (Types parRespType, std::string&& parValue, std::string&& parPageBaseName, const SettingsBag& parSettings, bool parWantRedis) :
 		m_resp_value(std::move(parValue)),
-		m_base_uri(parIni.parsed().at("tawashi").at("base_uri")),
+		m_base_uri(parSettings["base_uri"]),
 		//m_page_basename(fetch_page_basename(m_cgi_env)),
-		m_website_root(make_root_path(parIni.parsed().at("tawashi"))),
+		m_website_root(make_root_path(parSettings)),
 		m_page_basename(std::move(parPageBaseName)),
 		m_resp_type(parRespType),
 		m_header_sent(false)
 	{
 		if (parWantRedis) {
-			m_redis = std::make_unique<redis::IncRedis>(make_incredis(parIni.parsed().at("tawashi")));
+			m_redis = std::make_unique<redis::IncRedis>(make_incredis(parSettings));
 			m_redis->connect();
 		}
 	}

src/response.hpp

@@ -29,7 +29,7 @@ namespace redis {
 } //namespace redis
 
 namespace tawashi {
-	class IniFile;
+	class SettingsBag;
 
 	class Response {
 	public:
@@ -43,7 +43,7 @@ namespace tawashi {
 			Location
 		};
 
-		Response (Types parRespType, std::string&& parValue, std::string&& parPageBaseName, const IniFile& parIni, bool parWantRedis);
+		Response (Types parRespType, std::string&& parValue, std::string&& parPageBaseName, const SettingsBag& parSettings, bool parWantRedis);
 		const cgi::Env& cgi_env() const;
 		void change_type (Types parRespType, std::string&& parValue);
 		const boost::string_ref& base_uri() const;

src/response_factory.cpp

@@ -16,7 +16,7 @@
  */
 
 #include "response_factory.hpp"
-#include "ini_file.hpp"
+#include "settings_bag.hpp"
 #include <functional>
 #include <boost/container/flat_map.hpp>
 
@@ -25,12 +25,12 @@ namespace tawashi {
 	} //unnamed namespace
 
 	struct ResponseFactory::LocalData {
-		Kakoune::SafePtr<IniFile> settings;
+		Kakoune::SafePtr<SettingsBag> settings;
 		boost::container::flat_map<std::string, ResponseMakerFunc> makers;
 		ResponseMakerFunc jolly_maker;
 	};
 
-	ResponseFactory::ResponseFactory (const Kakoune::SafePtr<IniFile>& parSettings) :
+	ResponseFactory::ResponseFactory (const Kakoune::SafePtr<SettingsBag>& parSettings) :
 		m_local_data(std::make_unique<LocalData>())
 	{
 		m_local_data->settings = parSettings;

src/response_factory.hpp

@@ -22,13 +22,13 @@
 #include <memory>
 
 namespace tawashi {
-	class IniFile;
+	class SettingsBag;
 
 	class ResponseFactory {
 	public:
-		typedef std::function<std::unique_ptr<Response>(const IniFile&)> ResponseMakerFunc;
+		typedef std::function<std::unique_ptr<Response>(const SettingsBag&)> ResponseMakerFunc;
 
-		explicit ResponseFactory (const Kakoune::SafePtr<IniFile>& parSettings);
+		explicit ResponseFactory (const Kakoune::SafePtr<SettingsBag>& parSettings);
 		~ResponseFactory() noexcept;
 
 		std::unique_ptr<Response> make_response(const boost::string_ref& parName);

src/settings_bag.cpp

@@ -0,0 +1,44 @@
+/* Copyright 2017, Michele Santullo
+ * This file is part of "tawashi".
+ *
+ * "tawashi" 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.
+ *
+ * "tawashi" 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 "tawashi".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "settings_bag.hpp"
+#include <cassert>
+
+namespace tawashi {
+	SettingsBag::SettingsBag (const Kakoune::SafePtr<IniFile>& parIni) :
+		m_ini(parIni),
+		m_values(&parIni->parsed().at("tawashi"))
+	{
+		assert(m_values);
+	}
+
+	SettingsBag::~SettingsBag() noexcept = default;
+
+	const boost::string_ref& SettingsBag::operator[] (boost::string_ref parIndex) const {
+		auto it_found = m_values->find(parIndex);
+		if (m_values->end() != it_found)
+			return it_found->second;
+		else
+			return m_defaults.at(parIndex);
+	}
+
+	void SettingsBag::add_default (boost::string_ref parKey, boost::string_ref parValue) {
+		assert(m_defaults.find(parKey) == m_defaults.end());
+		m_defaults[parKey] = parValue;
+	}
+} //namespace tawashi
+

src/settings_bag.hpp

@@ -0,0 +1,41 @@
+/* Copyright 2017, Michele Santullo
+ * This file is part of "tawashi".
+ *
+ * "tawashi" 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.
+ *
+ * "tawashi" 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 "tawashi".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "ini_file.hpp"
+#include "kakoune/safe_ptr.hh"
+#include <map>
+#include <boost/utility/string_ref.hpp>
+#include <functional>
+
+namespace tawashi {
+	class SettingsBag : public Kakoune::SafeCountable {
+		typedef std::map<boost::string_ref, boost::string_ref> MapType;
+	public:
+		explicit SettingsBag (const Kakoune::SafePtr<IniFile>& parIni);
+		~SettingsBag() noexcept;
+
+		const boost::string_ref& operator[] (boost::string_ref parIndex) const;
+		void add_default (boost::string_ref parKey, boost::string_ref parValue);
+
+	private:
+		MapType m_defaults;
+		Kakoune::SafePtr<IniFile> m_ini;
+		const IniFile::KeyValueMapType* m_values;
+	};
+} //namespace tawashi

src/submit_paste_response.cpp

@@ -27,8 +27,8 @@ namespace tawashi {
 		const char g_post_key[] = "pastie";
 	} //unnamed namespace
 
-	SubmitPasteResponse::SubmitPasteResponse (const IniFile& parIni) :
-		Response(Response::ContentType, "text/plain", "paste", parIni, true)
+	SubmitPasteResponse::SubmitPasteResponse (const SettingsBag& parSettings) :
+		Response(Response::ContentType, "text/plain", "paste", parSettings, true)
 	{
 	}
 

src/submit_paste_response.hpp

@@ -24,7 +24,7 @@
 namespace tawashi {
 	class SubmitPasteResponse : public Response {
 	public:
-		explicit SubmitPasteResponse (const IniFile& parIni);
+		explicit SubmitPasteResponse (const SettingsBag& parSettings);
 
 	private:
 		virtual void on_process() override;