Feature: iq::Bind

.vscode/launch.json

@@ -12,6 +12,18 @@
             "args": [],
             "cwd": "${workspaceFolder}",
             "preLaunchTask": "GCC: Build"
+        },
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug: tests",
+            "program": "${workspaceFolder}/build/larra_xmpp_tests",
+            "args": [
+                // --gtest_filter=POSTIVE_PATTERNS[-NEGATIVE_PATTERNS]
+                // "--gtest_filter=Roster*"
+            ],
+            "cwd": "${workspaceFolder}",
+            "preLaunchTask": "GCC: Build"
         }
     ]
 }

.vscode/tasks.json

@@ -104,7 +104,7 @@
             "presentation": {
                 "clear": true
             },
-            "hide": true,
+            "hide": false,
             "group": {
                 "kind": "build"
             }

examples/src/connect.cpp

@@ -1,3 +1,4 @@
+#include <spdlog/common.h>
 #include <spdlog/spdlog.h>
 
 #include <boost/asio/co_spawn.hpp>
@@ -7,6 +8,8 @@
 #include <larra/printer_stream.hpp>
 #include <print>
 
+namespace iq = larra::xmpp::iq;
+
 auto Coroutine() -> boost::asio::awaitable<void> {
   SPDLOG_INFO("Connecting client...");
 
@@ -14,11 +17,26 @@ auto Coroutine() -> boost::asio::awaitable<void> {
     auto client = co_await larra::xmpp::client::CreateClient<larra::xmpp::PrintStream<boost::asio::ip::tcp::socket>>(
         larra::xmpp::PlainUserAccount{.jid = {.username = "test1", .server = "localhost"}, .password = "test1"},
         {.useTls = larra::xmpp::client::Options::kNever});
+
+    // rfc6120 7.1
+    // After a client authenticates with a server,
+    // it MUST bind a specific resource to the stream so that the server can properly address the client.
     co_await std::visit(
         [](auto& client) -> boost::asio::awaitable<void> {
+          co_await client.CreateResourceBind();
+        },
+        client);
+
+    // rfc6120 2.2
+    // Upon authenticating with a server and binding a resource (thus becoming a connected resource as defined in [XMPP‑CORE]),
+    // a client SHOULD request the roster before sending initial presence
+    co_await std::visit(
+        [](auto& client) -> boost::asio::awaitable<void> {
+          SPDLOG_INFO("Send presence: Available");
           co_await client.Send(larra::xmpp::presence::c2s::Available{});
         },
         client);
+
   } catch(const std::exception& err) {
     SPDLOG_ERROR("{}", err.what());
     co_return;

library/include/larra/bind.hpp

@@ -0,0 +1,24 @@
+#pragma once
+#include <libxml++/libxml++.h>
+#include <spdlog/spdlog.h>
+
+#include <larra/iq.hpp>
+#include <larra/jid.hpp>
+#include <optional>
+
+namespace larra::xmpp::iq {
+
+struct Bind {
+  static constexpr auto kDefaultName = "bind";
+  static constexpr auto kDefaultNamespace = "urn:ietf:params:xml:ns:xmpp-bind";
+
+  std::optional<FullJid> jid;
+
+  friend auto operator<<(xmlpp::Element* element, const Bind& bind) -> void;
+  [[nodiscard]] static auto Parse(xmlpp::Element* element) -> Bind;
+};
+
+using SetBind = Set<Bind>;
+using ResultBind = Result<Bind>;
+
+}  // namespace larra::xmpp::iq

library/include/larra/client/client.hpp

@@ -11,6 +11,7 @@
 #include <boost/asio/ssl.hpp>
 #include <boost/asio/use_awaitable.hpp>
 #include <charconv>
+#include <larra/bind.hpp>
 #include <larra/client/challenge_response.hpp>
 #include <larra/client/options.hpp>
 #include <larra/client/starttls_response.hpp>
@@ -21,6 +22,12 @@
 #include <larra/user_account.hpp>
 #include <larra/xml_stream.hpp>
 #include <ranges>
+#include <utility>
+
+namespace rng = std::ranges;
+namespace views = std::views;
+namespace iq = larra::xmpp::iq;
+
 namespace larra::xmpp {
 
 constexpr auto kDefaultXmppPort = 5222;
@@ -29,12 +36,10 @@ constexpr auto kDefaultXmppPort = 5222;
 
 namespace larra::xmpp::client {
 
-namespace rng = std::ranges;
-namespace views = std::views;
-
 template <typename Connection>
 struct Client {
-  constexpr Client(BareJid jid, XmlStream<Connection> connection) : jid(std::move(jid)), connection(std::move(connection)) {};
+  constexpr Client(BareJid jid, XmlStream<Connection> connection) : jid(std::move(jid)), connection(std::move(connection)) {
+  }
   template <boost::asio::completion_token_for<void()> Token = boost::asio::use_awaitable_t<>>
   constexpr auto Close(Token token = {}) {
     this->active = false;
@@ -68,14 +73,31 @@ struct Client {
   auto Send(const T& object) -> boost::asio::awaitable<void> {
     co_await this->connection.Send(object);
   }
-  [[nodiscard]] constexpr auto Jid() const -> const BareJid& {
+  [[nodiscard]] constexpr auto Jid() const -> const FullJid& {
     return this->jid;
   }
 
+  auto CreateResourceBind() -> boost::asio::awaitable<void> {
+    SPDLOG_INFO("Send IQ: Set::Bind");
+    co_await this->Send(::iq::SetBind{.id = "1", .payload = {}});
+
+    auto set_bind_response = co_await connection.template Read<Iq<::iq::Bind>>();
+    std::visit(utempl::Overloaded(
+                   [](auto error) {
+                     throw "Error response on IQ: Set::Bind: ''";  // TODO(unknown): Add exact error parsing
+                   },
+                   [&](::iq::ResultBind r) {
+                     jid.resource = std::move(r.payload.jid->resource);
+                     SPDLOG_INFO("Allocated resource: {}", jid.resource);
+                   }),
+               set_bind_response);
+    co_return;
+  }
+
  private:
   bool active = true;
   XmlStream<Connection> connection{};
-  BareJid jid;
+  FullJid jid;
 };
 
 struct StartTlsNegotiationError : std::runtime_error {

library/include/larra/jid.hpp

@@ -7,24 +7,6 @@
 
 namespace larra::xmpp {
 
-struct BareJid {
-  std::string username;
-  std::string server;
-  [[nodiscard]] static auto Parse(std::string_view jid) -> BareJid;
-  friend auto ToString(const BareJid& jid) -> std::string;
-
-  constexpr auto operator==(const BareJid&) const -> bool = default;
-  template <typename Self>
-  [[nodiscard]] constexpr auto Username(this Self&& self, std::string username) -> std::decay_t<Self> {
-    return utils::FieldSetHelper::With<"username", BareJid>(std::forward<Self>(self), std::move(username));
-  }
-
-  template <typename Self>
-  [[nodiscard]] constexpr auto Server(this Self&& self, std::string server) -> std::decay_t<Self> {
-    return utils::FieldSetHelper::With<"server", BareJid>(std::forward<Self>(self), std::move(server));
-  }
-};
-
 struct BareResourceJid {
   std::string server;
   std::string resource;
@@ -69,6 +51,28 @@ struct FullJid {
   }
 };
 
+struct BareJid {
+  std::string username;
+  std::string server;
+  constexpr operator FullJid(this auto&& self) {
+    return {.username = std::forward_like<decltype(self)>(self.username), .server = std::forward_like<decltype(self)>(self.server)};
+  }
+
+  [[nodiscard]] static auto Parse(std::string_view jid) -> BareJid;
+  friend auto ToString(const BareJid& jid) -> std::string;
+
+  constexpr auto operator==(const BareJid&) const -> bool = default;
+  template <typename Self>
+  [[nodiscard]] constexpr auto Username(this Self&& self, std::string username) -> std::decay_t<Self> {
+    return utils::FieldSetHelper::With<"username", BareJid>(std::forward<Self>(self), std::move(username));
+  }
+
+  template <typename Self>
+  [[nodiscard]] constexpr auto Server(this Self&& self, std::string server) -> std::decay_t<Self> {
+    return utils::FieldSetHelper::With<"server", BareJid>(std::forward<Self>(self), std::move(server));
+  }
+};
+
 using JidVariant = std::variant<BareJid, BareResourceJid, FullJid>;
 
 struct Jid : JidVariant {

library/src/bind.cpp

@@ -0,0 +1,31 @@
+#include <larra/bind.hpp>
+
+namespace larra::xmpp::iq {
+auto operator<<(xmlpp::Element* element, const Bind& bind) -> void {
+  element->set_attribute("xmlns", Bind::kDefaultNamespace);
+
+  if(bind.jid) {
+    auto* jid_el = element->add_child_element("jid");
+    jid_el->add_child_text(ToString(*bind.jid));
+  }
+}
+[[nodiscard]] auto Bind::Parse(xmlpp::Element* element) -> Bind {
+  const auto* jid_node = element->get_first_child("jid");
+  if(!jid_node) {
+    SPDLOG_DEBUG("No Jid Node at Iq::Bind");
+    return {};
+  }
+
+  auto* jid_el = dynamic_cast<const xmlpp::Element*>(jid_node);
+  if(!jid_el) {
+    throw std::runtime_error("dynamic_cast to const xmlpp::Element* failed");
+  }
+
+  const auto* text = jid_el->get_first_child_text();
+  if(!jid_el) {
+    throw std::runtime_error("No text at Iq::Bind jid child");
+  }
+
+  return {.jid = (jid_node ? std::optional{FullJid::Parse(text->get_content())} : std::nullopt)};
+}
+}  // namespace larra::xmpp::iq