feat: Add escape sequence decoding for greeting messages

- Implemented `_decode_escape_sequences` method in `GreeterCommand` to process escape sequences like `\\n`, `\\t`, and `\\r` in greeting messages.
- Updated `_load_config` to decode escape sequences in `greeting_message` and `mesh_info_format`, enhancing user flexibility in message formatting.
- Added decoding for per-channel greetings to ensure consistent message formatting across different channels.

modules/commands/greeter_command.py

@@ -119,16 +119,43 @@ class GreeterCommand(BaseCommand):
                 import traceback
                 self.logger.error(traceback.format_exc())
     
+    def _decode_escape_sequences(self, text: str) -> str:
+        """Decode escape sequences in config strings.
+        
+        Processes common escape sequences like \\n (newline), \\t (tab), \\\\ (backslash).
+        This allows users to add newlines in greeting messages using \\n.
+        
+        Args:
+            text: The text string to process.
+            
+        Returns:
+            str: The text with escape sequences decoded.
+        """
+        # Replace escape sequences
+        # Order matters: \\ must be processed first to avoid double-processing
+        text = text.replace('\\\\', '\x00')  # Temporary placeholder for backslash
+        text = text.replace('\\n', '\n')     # Newline
+        text = text.replace('\\t', '\t')     # Tab
+        text = text.replace('\\r', '\r')     # Carriage return
+        text = text.replace('\x00', '\\')    # Restore backslash
+        return text
+    
     def _load_config(self) -> None:
         """Load configuration for greeter command."""
         self.enabled = self.get_config_value('Greeter_Command', 'enabled', fallback=False, value_type='bool')
         self.greeting_message = self.get_config_value('Greeter_Command', 'greeting_message', 
                                                       fallback='Welcome to the mesh, {sender}!')
+        # Decode escape sequences (e.g., \\n for newlines)
+        self.greeting_message = self._decode_escape_sequences(self.greeting_message)
+        
         self.rollout_days = self.get_config_value('Greeter_Command', 'rollout_days', fallback=7, value_type='int')
         self.include_mesh_info = self.get_config_value('Greeter_Command', 'include_mesh_info', 
                                                        fallback=True, value_type='bool')
         self.mesh_info_format = self.get_config_value('Greeter_Command', 'mesh_info_format',
                                                       fallback='\n\nMesh Info: {total_contacts} contacts, {repeaters} repeaters')
+        # Decode escape sequences (e.g., \\n for newlines)
+        self.mesh_info_format = self._decode_escape_sequences(self.mesh_info_format)
+        
         self.per_channel_greetings = self.get_config_value('Greeter_Command', 'per_channel_greetings',
                                                            fallback=False, value_type='bool')
         self.auto_backfill = self.get_config_value('Greeter_Command', 'auto_backfill', 
@@ -163,6 +190,8 @@ class GreeterCommand(BaseCommand):
                     channel_name, greeting = entry.split(':', 1)
                     channel_name = channel_name.strip()
                     greeting = greeting.strip()
+                    # Decode escape sequences (e.g., \\n for newlines)
+                    greeting = self._decode_escape_sequences(greeting)
                     # Store both original and lowercase channel name for case-insensitive matching
                     self.channel_greetings[channel_name.lower()] = {
                         'channel': channel_name,