Add echo-message support for IRC (#4157)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

CHANGELOG.md

@@ -83,6 +83,7 @@
 - Minor: Add settings tooltips. (#3437)
 - Minor: Add setting to limit message input length. (#3418)
 - Minor: Make built-in commands work in IRC channels. (#4160)
+- Minor: Add support for `echo-message` capabilities for IRC. (#4157)
 - Minor: Improved look of tabs when using a layout other than top. (#3925, #4152)
 - Bugfix: Fixed channels with two leading `#`s not being usable on IRC (#4154)
 - Bugfix: Fixed `Add new account` dialog causing main chatterino window to be non movable. (#4121)

src/providers/irc/IrcChannel2.cpp

@@ -38,7 +38,10 @@ void IrcChannel::sendMessage(const QString &message)
         if (this->server() != nullptr)
         {
             this->server()->sendMessage(this->getName(), message);
-
+            if (this->server()->hasEcho())
+            {
+                return;
+            }
             MessageBuilder builder;
 
             builder

src/providers/irc/IrcServer.cpp

@@ -111,6 +111,15 @@ void IrcServer::initializeConnectionSignals(IrcConnection *connection,
                              }
                          }
                      });
+    QObject::connect(connection,
+                     &Communi::IrcConnection::capabilityMessageReceived, this,
+                     [this](Communi::IrcCapabilityMessage *message) {
+                         const QStringList caps = message->capabilities();
+                         if (caps.contains("echo-message"))
+                         {
+                             this->hasEcho_ = true;
+                         }
+                     });
 }
 
 void IrcServer::initializeConnection(IrcConnection *connection,
@@ -127,6 +136,7 @@ void IrcServer::initializeConnection(IrcConnection *connection,
                                                         : this->data_->nick);
     connection->setRealName(this->data_->real.isEmpty() ? this->data_->user
                                                         : this->data_->nick);
+    connection->network()->setRequestedCapabilities({"echo-message"});
 
     if (getSettings()->enableExperimentalIrc)
     {
@@ -289,4 +299,9 @@ void IrcServer::readConnectionMessageReceived(Communi::IrcMessage *message)
     }
 }
 
+bool IrcServer::hasEcho() const
+{
+    return this->hasEcho_;
+}
+
 }  // namespace chatterino

src/providers/irc/IrcServer.hpp

@@ -20,6 +20,8 @@ public:
     const QString &nick();
     const QString &userFriendlyIdentifier();
 
+    bool hasEcho() const;
+
     // AbstractIrcServer interface
 protected:
     void initializeConnectionSignals(IrcConnection *connection,
@@ -36,6 +38,8 @@ protected:
 private:
     // pointer so we don't have to circle include Irc2.hpp
     IrcServerData *data_;
+
+    bool hasEcho_{false};
 };
 
 }  // namespace chatterino