feat: Integrate new webserver (#1722)

For #919.
The new web server is not using dosguard yet. It will be fixed by a
separate PR.

src/web/SubscriptionContext.cpp

@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2024, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include "web/SubscriptionContext.hpp"
+
+#include "util/Taggable.hpp"
+#include "web/SubscriptionContextInterface.hpp"
+#include "web/interface/ConnectionBase.hpp"
+
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <utility>
+
+namespace web {
+
+SubscriptionContext::SubscriptionContext(
+    util::TagDecoratorFactory const& factory,
+    std::shared_ptr<ConnectionBase> connection
+)
+    : SubscriptionContextInterface{factory}, connection_{connection}
+{
+}
+
+SubscriptionContext::~SubscriptionContext()
+{
+    onDisconnect_(this);
+}
+
+void
+SubscriptionContext::send(std::shared_ptr<std::string> message)
+{
+    if (auto connection = connection_.lock(); connection != nullptr)
+        connection->send(std::move(message));
+}
+
+void
+SubscriptionContext::onDisconnect(OnDisconnectSlot const& slot)
+{
+    onDisconnect_.connect(slot);
+}
+
+void
+SubscriptionContext::setApiSubversion(uint32_t value)
+{
+    apiSubVersion_ = value;
+}
+
+uint32_t
+SubscriptionContext::apiSubversion() const
+{
+    return apiSubVersion_;
+}
+
+}  // namespace web