From 789e5555ab4c44a1ae779eccf6ccf8340602cf22 Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Thu, 26 Jan 2023 20:46:30 +0100
Subject: Websockets: Notify other clients of changes

---
 connectionregistry.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 connectionregistry.h

(limited to 'connectionregistry.h')

diff --git a/connectionregistry.h b/connectionregistry.h
new file mode 100644
index 0000000..2b14553
--- /dev/null
+++ b/connectionregistry.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include <algorithm>
+#include <memory>
+#include <unordered_map>
+#include <unordered_set>
+
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/beast/websocket.hpp>
+
+class ConnectionRegistry
+{
+public:
+ using connection = std::shared_ptr<boost::beast::websocket::stream<boost::asio::ip::tcp::socket>>;
+
+ ConnectionRegistry() = default;
+ ~ConnectionRegistry() = default;
+
+ void setId(connection c, const std::string& id);
+
+ // used via RegistryGuard
+ void addConnection(connection c);
+ void delConnection(connection c);
+
+ // map connection to id
+ std::unordered_map<connection, std::string> m_connections;
+ // map id to list of related connections, used for iteration over connections to notify about changes
+ std::unordered_map<std::string, std::unordered_set<connection>> m_ids;
+
+ std::unordered_set<connection>::iterator begin(const std::string& id);
+ std::unordered_set<connection>::iterator end(const std::string& id);
+
+ void dump();
+
+ class RegistryGuard
+ {
+ public:
+  RegistryGuard(ConnectionRegistry& registry, connection c);
+  ~RegistryGuard();
+ private:
+  ConnectionRegistry& m_registry;
+  connection m_connection;
+ };
+
+};
+
-- 
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