Check message sequence

This is an example of outputting the flow from a specific message.

public void GetSendMessages(ICommandContext c, ICommandParams p) 
{ 
ISequenceDiagram sequenceDiagram = c.App.Workspace.CurrentEditor as ISequenceDiagram; 
if (sequenceDiagram == null) return; 

//Get the starting message 
var message = sequenceDiagram.GetSelectedShapes().FirstOrDefault() as IMessageShape; 
//End processing if the starting message is a reply message 
if (message.GetMessageKind() == "reply") return; 

//Output message information 
OutputMessageInfo(message, c); 
} 

//Output message information starting from the target message 
private void OutputMessageInfo(IMessageShape message, ICommandContext c) 
{ 
OutputLog(message, c); 

var receivePort = message.ReceivePort; 

//If the message receiver is an execution specification, follow the next message. 
if (receivePort is IExecutionSpecificationShape executionSpecification) 
{ 
foreach (IMessageShape sendMessage in executionSpecification.SendMessages) 
{ 
if (sendMessage.GetMessageKind() == "reply") continue; 
OutputMessageInfo(sendMessage, c); 
} 
} 
} 

//Output message information 
private void OutputLog(IMessageShape message, ICommandContext c) 
{ 
//Output message information (including sender and receiver) 
c.App.Output.WriteLine("sample", $"{message.GetSendPortText()} -> {message.GetReceivePortText()} : {message.Text}"); 
} 

public static class IMessageShapeExtension 
{ 
//Get the message type 
public static string GetMessageKind(this IMessageShape self) 
{ 
return ((IMessage) self.Model).Kind; 
} 

//Get the text of the sender port 
public static string GetSendPortText(this IMessageShape self) 
{ 
return GetMessagePortText(self.SendPort); 
} 

//Get the text of the receiver port 
public static string GetReceivePortText(this IMessageShape self) 
{ 
return GetMessagePortText(self.ReceivePort); 
} 

//Get the text of the message end 
private static string GetMessagePortText(IMessagePortShape messagePort) 
{ 
//Get the text to output depending on the type of message end 
switch (messagePort) 
{ 
case IFrameShape frame: 
return frame.Text; 
case IExecutionSpecificationShape executionSpecification: 
return executionSpecification.Lifeline.Text; 
case IMessageEndShape messageEnd: 
return "Message end"; 
} 
return string.Empty; 
} 
}