Add presence types

library/include/larra/client/client.hpp

@@ -64,7 +64,10 @@ struct Client {
       this->Close([] {});
     }
   }
-
+  template <typename T>
+  auto Send(const T& object) -> boost::asio::awaitable<void> {
+    co_await this->connection.Send(object);
+  }
   [[nodiscard]] constexpr auto Jid() const -> const BareJid& {
     return this->jid;
   }

library/include/larra/presence.hpp

@@ -0,0 +1,121 @@
+#pragma once
+#include <libxml++/libxml++.h>
+
+#include <larra/jid.hpp>
+#include <optional>
+#include <variant>
+
+namespace larra::xmpp::presence {
+
+namespace c2s {
+
+struct Unavailable {
+  static constexpr auto kDefaultName = "presence";
+  friend constexpr auto operator<<(xmlpp::Element* element, const Unavailable&) {
+    element->set_attribute("type", "unavailable");
+  }
+  [[nodiscard]] static constexpr auto TryParse(xmlpp::Element* element) -> std::optional<Unavailable> {
+    if(auto type = element->get_attribute("type")) {
+      if(type->get_value() == "unavailable") {
+        return Unavailable{};
+      };
+    }
+    return std::nullopt;
+  }
+  [[nodiscard]] static constexpr auto Parse(xmlpp::Element* element) -> Unavailable {
+    return Unavailable::TryParse(element).value();
+  }
+};
+
+struct Available {
+  static constexpr auto kDefaultName = "presence";
+  friend constexpr auto operator<<(xmlpp::Element*, const Available&) {
+  }
+  [[nodiscard]] static constexpr auto TryParse(xmlpp::Element* element) -> std::optional<Available> {
+    return Unavailable::TryParse(element).has_value() ? std::nullopt : std::optional{Available{}};
+  }
+  [[nodiscard]] static constexpr auto Parse(xmlpp::Element* element) -> Available {
+    return Available::TryParse(element).value();
+  }
+};
+
+}  // namespace c2s
+
+using ClientToServer = std::variant<c2s::Unavailable, c2s::Available>;
+
+struct Initial {
+  static constexpr auto kDefaultName = "presence";
+  FullJid from;
+  BareJid to;
+  template <typename Self>
+  [[nodiscard]] constexpr auto From(this Self&& self, BareJid value) -> Initial {
+    return utils::FieldSetHelper::With<"from", Initial>(std::forward<Self>(self), std::move(value));
+  }
+  template <typename Self>
+  [[nodiscard]] constexpr auto To(this Self&& self, BareJid value) -> Initial {
+    return utils::FieldSetHelper::With<"to", Initial>(std::forward<Self>(self), std::move(value));
+  }
+  friend constexpr auto operator<<(xmlpp::Element* element, const Initial& presence) {
+    element->set_attribute("from", ToString(presence.from));
+    element->set_attribute("to", ToString(presence.to));
+  }
+  [[nodiscard]] static constexpr auto Parse(xmlpp::Element* element) -> Initial {
+    auto from = element->get_attribute("from");
+    if(!from) {
+      throw std::runtime_error("Not found attribute from for Parse presence::Initial");
+    }
+    auto to = element->get_attribute("to");
+    if(!to) {
+      throw std::runtime_error("Not found attribute to for Parse presence::Initial");
+    }
+    return {.from = FullJid::Parse(from->get_value()), .to = BareJid::Parse(to->get_value())};
+  }
+};
+
+struct Probe {
+  static constexpr auto kDefaultName = "presence";
+  BareJid from;
+  BareJid to;
+  std::string id;
+  template <typename Self>
+  [[nodiscard]] constexpr auto From(this Self&& self, BareJid value) -> Probe {
+    return utils::FieldSetHelper::With<"from", Probe>(std::forward<Self>(self), std::move(value));
+  }
+  template <typename Self>
+  [[nodiscard]] constexpr auto To(this Self&& self, BareJid value) -> Probe {
+    return utils::FieldSetHelper::With<"to", Probe>(std::forward<Self>(self), std::move(value));
+  }
+  template <typename Self>
+  [[nodiscard]] constexpr auto Id(this Self&& self, std::string value) -> Probe {
+    return utils::FieldSetHelper::With<"id", Probe>(std::forward<Self>(self), std::move(value));
+  }
+  friend constexpr auto operator<<(xmlpp::Element* element, const Probe& presence) {
+    element->set_attribute("from", ToString(presence.from));
+    element->set_attribute("to", ToString(presence.to));
+  }
+  [[nodiscard]] static constexpr auto Parse(xmlpp::Element* element) -> Probe {
+    auto type = element->get_attribute("type");
+    if(!type) {
+      throw std::runtime_error("Not found attribute type for Parse presence::Probe");
+    }
+    if(type->get_value() != "probe") {
+      throw std::runtime_error("Invalid attribute type value for Parse presence::Probe");
+    }
+    auto from = element->get_attribute("from");
+    if(!from) {
+      throw std::runtime_error("Not found attribute from for Parse presence::Probe");
+    }
+    auto to = element->get_attribute("to");
+    if(!to) {
+      throw std::runtime_error("Not found attribute to for Parse presence::Probe");
+    }
+    auto id = element->get_attribute("id");
+    if(!id) {
+      throw std::runtime_error("Not found attribute id for Parse presence::Probe");
+    }
+
+    return {.from = BareJid::Parse(from->get_value()), .to = BareJid::Parse(to->get_value()), .id = id->get_value()};
+  }
+};
+
+}  // namespace larra::xmpp::presence