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.cpp | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 connectionregistry.cpp

(limited to 'connectionregistry.cpp')

diff --git a/connectionregistry.cpp b/connectionregistry.cpp
new file mode 100644
index 0000000..1e48a96
--- /dev/null
+++ b/connectionregistry.cpp
@@ -0,0 +1,95 @@
+#include "connectionregistry.h"
+
+#include <iostream>
+#include <utility>
+
+void ConnectionRegistry::setId(ConnectionRegistry::connection c, const std::string& id)
+{
+ if (!m_connections.at(c).empty()) {
+  auto& connections_set{m_ids.at(id)};
+  connections_set.erase(c);
+  if (connections_set.empty())
+   m_ids.erase(id);
+ }
+ 
+ m_connections.at(c) = id;
+
+ if (!id.empty()) {
+  if (!m_ids.contains(id))
+   m_ids[id] = {};
+  m_ids.at(id).insert(c);
+ }
+
+}
+
+void ConnectionRegistry::addConnection(ConnectionRegistry::connection c)
+{
+ if (m_connections.contains(c))
+  throw std::runtime_error("ConnectionRegistry::addConnection: connection already exists");
+
+ m_connections.emplace(c, "");
+
+ std::cout << "Info: Added connection, now " << m_connections.size() << std::endl;
+}
+
+void ConnectionRegistry::delConnection(ConnectionRegistry::connection c)
+{
+ if (!m_connections.contains(c))
+  throw std::runtime_error("ConnectionRegistry::delConnection: connection doesn't exist");
+
+ std::string id {m_connections.at(c)};
+
+ m_connections.erase(c);
+
+ if (!id.empty()) {
+  auto& connections_set{m_ids.at(id)};
+  connections_set.erase(c);
+  if (connections_set.empty())
+   m_ids.erase(id);
+ }
+ 
+ std::cout << "Info: Deleted connection, now " << m_connections.size() << std::endl;
+}
+
+std::unordered_set<ConnectionRegistry::connection>::iterator ConnectionRegistry::begin(const std::string& id)
+{
+ return m_ids.at(id).begin();
+}
+
+std::unordered_set<ConnectionRegistry::connection>::iterator ConnectionRegistry::end(const std::string& id)
+{
+ return m_ids.at(id).end();
+}
+
+void ConnectionRegistry::dump()
+{
+ std::cout << "Connection Registry:" << std::endl;
+ 
+ std::cout << "Connections: " << std::endl;
+ for (auto& i: m_connections) {
+  std::cout << "    " << i.first << ": " << i.second << std::endl;
+ }
+ 
+ std::cout << "IDs: " << std::endl;
+ for (auto& i: m_ids) {
+  std::cout << "    " << i.first << ":";
+
+  for (auto& j: i.second) {
+   std::cout << " " << j;
+  }
+  std::cout << std::endl;
+ }
+}
+
+ConnectionRegistry::RegistryGuard::RegistryGuard(ConnectionRegistry& registry, ConnectionRegistry::connection c):
+ m_registry{registry},
+ m_connection{c}
+{
+ m_registry.addConnection(m_connection);
+}
+
+ConnectionRegistry::RegistryGuard::~RegistryGuard()
+{
+ m_registry.delConnection(m_connection);
+}
+
-- 
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