From 5a40f51085e2132bf91eccdd37e1a8dabe588efd Mon Sep 17 00:00:00 2001
From: Eddy Pedroni <epedroni@pm.me>
Date: Thu, 24 Jul 2025 10:34:13 +0200
Subject: Rough implementation of autoconnect

---
 daemon/src/connection_manager.cpp | 52 +++++++++++++++++++++++++++++++++------
 1 file changed, 45 insertions(+), 7 deletions(-)

(limited to 'daemon/src/connection_manager.cpp')

diff --git a/daemon/src/connection_manager.cpp b/daemon/src/connection_manager.cpp
index ac4c6cb..faad061 100644
--- a/daemon/src/connection_manager.cpp
+++ b/daemon/src/connection_manager.cpp
@@ -3,9 +3,10 @@
 #include "device_connection.h"
 
 #include "udevw/include/udevw.hpp"
+#include <rtmidi/RtMidi.h>
 
 #include <iostream>
-#include <chrono>
+#include <map>
 
 namespace midi_router
 {
@@ -36,8 +37,8 @@ Connection_Manager::Connection_Manager(Device_Map const & device_map, Submitter
         for (auto const & [name, id] : device_map)
         {
             m_connections[id] = std::make_unique<Device_Connection>(id, name, submitter, callback);
-            m_connections[id]->open();
         }
+        refresh_devices(true, false);
     }
 
 Connection_Manager::~Connection_Manager() = default;
@@ -51,13 +52,50 @@ Connection_Manager::get_sender(Device_Id const & device) const
 void
 Connection_Manager::detect_devices()
 {
-    while (true)
+    auto udev = udevw::Udev::create();
+    auto monitor = udevw::Monitor::create_from_netlink(udev, "udev");
+    monitor.filter_add_match_subsystem("sound"); // devtype = nullptr implied
+    monitor.enable_receiving();
+
+    int fd = monitor.get_fd();
+    for (;;) {
+        fd_set fds;
+        FD_ZERO(&fds);
+        FD_SET(fd, &fds);
+
+        if (select(fd +1, &fds, nullptr, nullptr, nullptr) > 0 && FD_ISSET(fd, &fds)) {
+            auto device = monitor.receive_device();
+
+            auto action = device.get_action();
+            if (!action) continue;
+
+            bool add = *action == "add";
+            bool remove = *action == "remove";
+            refresh_devices(add, remove);
+        }
+    }
+}
+
+void
+Connection_Manager::refresh_devices([[maybe_unused]] bool add, [[maybe_unused]] bool remove)
+{
+    // collect currently connected devices
+    RtMidiIn enumerator {};
+    std::map<std::size_t, std::string> port_map {};
+    for (std::size_t i = 0; i < enumerator.getPortCount(); ++i)
+    {
+        std::string name = enumerator.getPortName(i);
+        port_map[i] = name;
+    }
+
+    for (auto & [id, device] : m_connections)
     {
-        std::cout << "Polling for devices\n";
-        std::this_thread::sleep_for(std::chrono::seconds(1));
-        for (auto && [id, connection] : m_connections)
+        for (auto const & [port, name] : port_map)
         {
-            connection->open();
+            if (name.contains(device->device_name))
+            {
+                device->reconnect(port);
+            }
         }
     }
 }
-- 
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