From f3a4607d6a722a862af0eb9747a15dcdf624b6fb Mon Sep 17 00:00:00 2001
From: Aqua-sama <aqua@iserlohn-fortress.net>
Date: Sun, 3 Nov 2019 00:18:10 +0200
Subject: Drop boost dependency

- wrote not-invented-here config file parser and conf class
- spent obscene amount of time plugging in said conf class
---
 lib/configuration/configuration.h | 136 +++++++++++++-------------------------
 1 file changed, 46 insertions(+), 90 deletions(-)

(limited to 'lib/configuration/configuration.h')

diff --git a/lib/configuration/configuration.h b/lib/configuration/configuration.h
index 40da50e..bc8f52e 100644
--- a/lib/configuration/configuration.h
+++ b/lib/configuration/configuration.h
@@ -9,121 +9,77 @@
 #ifndef SMOLBOTE_CONFIGURATION_H
 #define SMOLBOTE_CONFIGURATION_H
 
-#include <QAction>
-#include <QString>
-#include <QStringList>
-#include <QVariant>
-#include <boost/program_options.hpp>
 #include <optional>
 #include <string>
 #include <vector>
+#include <unordered_map>
+#include <variant>
+#include <initializer_list>
+#include <memory>
+#include <QAction>
+#include <QString>
 
-class Configuration : public QObject
+typedef std::variant<std::string, int, bool> conf_value_t;
+
+class [[clang::consumable(unconsumed)]] Configuration : private std::unordered_map<std::string, conf_value_t>
 {
-    Q_OBJECT
 
 public:
-    explicit Configuration(int argc, char** argv, const std::string &path, QObject *parent = nullptr);
+    [[clang::return_typestate(unconsumed)]]
+    explicit Configuration();
+
+    [[clang::return_typestate(unconsumed)]]
+    explicit Configuration(std::initializer_list<std::pair<std::string, conf_value_t>> l) noexcept;
+
+    explicit Configuration(Configuration &&other [[clang::param_typestate(unconsumed)]]) = default;
+
     ~Configuration() = default;
 
-    bool exists(const char *path)
-    {
-        return vm.count(path) ? true : false;
-    }
+    [[clang::callable_when(unconsumed)]]
+    void read(std::basic_istream<char> &input);
 
     template <typename T>
-    std::optional<T> value(const char *path) const
+    [[clang::callable_when(unconsumed)]] std::optional<T> value(const char *path) const
     {
-        // if setting doesn't exist, we crash
-        // in debug builds, check if setting exists
-
-        if(vm.count(path) == 0) {
+        if(use_global)
+            return instance()->value<T>(path);
+        
+        if(this->count(path) == 0) {
             return std::nullopt;
         }
 
-        // path is guaranteed to exist, so using vm[path] is safe
-
-        if constexpr(std::is_same_v<T, QStringList>) {
-            QStringList r;
-            for(const std::string &item : vm[path].as<std::vector<std::string>>()) {
-                r.append(QString::fromStdString(item));
-            }
-            return std::optional<QStringList>(r);
-
-        } else if constexpr(std::is_same_v<T, std::string> || std::is_same_v<T, QString>) {
-
-            if(vm[path].value().type() == typeid(int)) {
-                if constexpr(std::is_same_v<T, std::string>)
-                    return std::optional<std::string>(std::to_string(vm[path].as<int>()));
-                else if constexpr(std::is_same_v<T, QString>)
-                    return std::optional<QString>(QString::number(vm[path].as<int>()));
-            }
-
-            if(vm[path].value().type() == typeid(bool)) {
-                return std::optional<T>(vm[path].as<bool>() ? "true" : "false");
-            }
-
-            std::string r = vm[path].as<std::string>();
+        // path is guaranteed to exist
+        const auto value = at(path);
 
-            // check if it's a path
-            if(r.front() == '~') {
+        if constexpr(std::is_same_v<T, QString> || std::is_same_v<T, std::string>) {
+            auto r = std::get<std::string>(value);
+            if(r.front() == '~')
                 r.replace(0, 1, m_homePath);
-            }
 
-            if constexpr(std::is_same_v<T, std::string>)
-                    return std::optional<std::string>(r);
-            else if constexpr(std::is_same_v<T, QString>)
-                    return std::optional<QString>(QString::fromStdString(r));
+            if constexpr(std::is_same_v<T, QString>)
+                return std::make_optional(QString::fromStdString(r));
+            else
+                return std::make_optional(r);
 
-        } else
-            return std::optional<T>(vm[path].as<T>());
-    }
-
-    template <typename T>
-    void setValue(const char *path, const T &value)
-    {
-        if(vm.count(path) == 0) {
-            qWarning("value(%s) does not exist", path);
-        }
-
-        vm.at(path).value() = value;
-
-        emit settingChanged(path, value);
-    }
+        } else if constexpr(std::is_same_v<T, QStringList>) {
+            return std::make_optional(QString::fromStdString(std::get<std::string>(value)).split(';'));
 
-    void setShortcut(QAction *action, const char *name) const
-    {
-        Q_CHECK_PTR(action);
-
-        const auto shortcutText = this->value<QString>(name);
-        if(shortcutText) {
-            const QString tooltip = action->toolTip();
-            action->setShortcut(QKeySequence::fromString(shortcutText.value()));
-            action->setToolTip(QString("%1 (%2)").arg(tooltip, shortcutText.value()));
-
-            connect(this, &Configuration::settingChanged, action, [=](const std::string &path, const QString &value) {
-                if(path == name) {
-                    action->setShortcut(QKeySequence::fromString(value));
-                    action->setToolTip(QString("%1 (%2)").arg(tooltip, value));
-                }
-            });
-        }
-    }
-
-    QHash<QString, QString> section(const std::string &prefix) const;
-    const boost::program_options::options_description& description() const
-    {
-        return configuration_desc;
-    }
+        } else if (std::holds_alternative<T>(value)) {
+            return std::optional<T>(std::get<T>(value));
+        } else
+            return std::nullopt;
+        
+    } // std::optional<T> value(path) const
 
-signals:
-    void settingChanged(const std::string &path, const QString &value);
+    static void move_global(std::unique_ptr<Configuration> &&conf);
 
 private:
-    boost::program_options::options_description configuration_desc;
-    boost::program_options::variables_map vm;
+    static Configuration *instance();
 
     const std::string m_homePath;
+    const bool use_global = false;
 };
 
+void setShortcut(QAction *action, const char *name);
+
 #endif // SMOLBOTE_CONFIGURATION_H
-- 
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