Вынести вычисление UID виртуальной клавиатуры в статический метод

src/VirtualKeyboard.cpp

@@ -52,17 +52,21 @@ bool VirtualKeyboard::init() {
     return false;
 }
 
-std::string VirtualKeyboard::get_uid() const {
-    std::size_t hash = std::hash<std::string>{}(name);
+std::string VirtualKeyboard::make_uid(const char *dev_name, int bus, int vid, int pid, int ver) {
+    std::size_t hash = std::hash<std::string>{}(dev_name ? dev_name : "");
 
     char buf[64];
     std::snprintf(buf, sizeof(buf),
                   "%04x:%04x:%04x:%04x:%016zx",
-                  bustype, vendor, product, version, hash);
+                  bus, vid, pid, ver, hash);
 
     return buf;
 }
 
+std::string VirtualKeyboard::get_uid() const {
+    return make_uid(name, bustype, vendor, product, version);
+}
+
 void VirtualKeyboard::emit_key(int code, int value) {
     if (!uidev_) return;
 

src/VirtualKeyboard.h

@@ -22,6 +22,8 @@ class VirtualKeyboard {
 
     bool init();
 
+    static std::string make_uid(const char *dev_name, int bus, int vid, int pid, int ver);
+
     std::string get_uid() const;
 
     void emit_key(int code, int value);

src/main.cpp

@@ -281,7 +281,7 @@ bool configure() {
         return false;
     }
 
-    std::string uid = vk.get_uid();
+    std::string uid = VirtualKeyboard::make_uid(vk.name, vk.bustype, vk.vendor, vk.product, vk.version);
     reader.add_to_blacklist(uid);
 
     bool connected;