implement cap new and cap del (cap-notify)

src/irc/inputfilter.cpp

@@ -862,6 +862,14 @@ void InputFilter::parseServerCommand(const QString &prefix, const QString &comma
                     m_server->capInitiateNegotiation (trailing);
                 }
             }
+            else if (command == QLatin1String("new"))
+            {
+                m_server->capInitiateNegotiation(trailing);
+            }
+            else if (command == QLatin1String("del"))
+            {
+                m_server->capDel(trailing);
+            }
         }
         else if (command == QLatin1String("authenticate") && plHas(1))
         {

src/irc/server.cpp

@@ -836,6 +836,21 @@ void Server::capDenied(const QString& name)
         getStatusView()->appendServerMessage(i18n("Error"), i18n("SASL capability denied or not supported by server."));
 }
 
+void Server::capDel(const QString &unavailableCaps)
+{
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+    const QStringList capsList = unavailableCaps.split(QLatin1Char(' '), QString::SkipEmptyParts);
+#else
+    const QStringList capsList = unavailableCaps.split(QLatin1Char(' '), Qt::SkipEmptyParts);
+#endif
+
+    for (const QString &capString : qAsConst(capsList))
+    {
+        if (m_capabilityNames.contains(capString))
+            m_capabilities &= ~(m_capabilityNames.value(capString));
+    }
+}
+
 void Server::registerWithServices()
 {
     if (!getIdentity())
@@ -4451,6 +4466,7 @@ void Server::initCapablityNames()
         { QStringLiteral("account-notify"),         AccountNotify },
         { QStringLiteral("znc.in/self-message"),    SelfMessage },
         { QStringLiteral("chghost"),                ChgHost },
+        { QStringLiteral("cap-notify"),             CapNofify },
     };
 }
 

src/irc/server.h

@@ -102,6 +102,7 @@ class Server : public QObject
             AccountNotify = 0x80,
             SelfMessage = 0x100,
             ChgHost = 0x200,
+            CapNofify = 0x400,
         };
         Q_DECLARE_FLAGS(CapabilityFlags, CapabilityFlag)
 
@@ -560,6 +561,7 @@ class Server : public QObject
         void capAcknowledged(const QString& name, CapModifiers modifiers);
         void capDenied(const QString& name);
         void sendAuthenticate(const QString& message);
+        void capDel(const QString &unavailableCaps);
 
     private Q_SLOTS:
         void hostFound();