welcome.py fixed to greet only new users. timezone plugin added.

plugins/welcome.py

@@ -2,7 +2,7 @@
 Plugin for welcoming new users to the room.
 
 Features:
-  * Automatically greets users when they join the target room.
+  * Automatically greets users when they first join the target room.
   * !welcome command – manually trigger the welcome message for yourself.
   * Per-user cooldown to prevent welcome spam on repeated part/join cycles.
 
@@ -52,17 +52,7 @@ def _record_welcome(user_id: str) -> None:
 
 def _build_welcome_message(display_name: str) -> str:
     """Return the Markdown welcome message for a given display name."""
-    return (
-        f"Welcome to the room, **{display_name}**! 🎉\n\n"
-        "We're glad to have you here in "
-        "**Self‑hosting | Security | Sysadmin | Homelab | Programming**!\n\n"
-        "To help us get to know you better:\n"
-        "• 🔧 **What do you self‑host?** Got any cool services running?\n"
-        "• 🔐 **Are you into cybersecurity?** What areas interest you most?\n"
-        "• 💻 **What programming languages do you use?**\n"
-        "• 🏠 **Tell us about your homelab setup!**\n\n"
-        "Feel free to introduce yourself and jump into the conversation! 🍄"
-    )
+    return f"Hey **{display_name}**, welcome in — so glad to have you here! 🎉 Feel free to tell us a bit about what you're into (self‑hosting, security, homelabs, programming… or just lurk and say hi whenever 🍄)"
 
 
 # ---------------------------------------------------------------------------
@@ -97,6 +87,28 @@ def setup(bot):
             logging.debug("Ignoring bot's own join event")
             return
 
+        # Check if this is a genuine first join by looking for previous membership
+        is_first_join = True
+
+        # Check prev_content directly on the event
+        if hasattr(event, 'prev_content') and event.prev_content:
+            prev_membership = event.prev_content.get('membership')
+            if prev_membership is not None:
+                is_first_join = False
+                logging.debug(f"User {event.sender} had previous membership '{prev_membership}' in prev_content")
+
+        # Check unsigned field (some events store prev_content there)
+        if is_first_join and hasattr(event, 'unsigned') and event.unsigned:
+            prev_content = event.unsigned.get('prev_content', {})
+            prev_membership = prev_content.get('membership')
+            if prev_membership is not None:
+                is_first_join = False
+                logging.debug(f"User {event.sender} had previous membership '{prev_membership}' in unsigned")
+
+        if not is_first_join:
+            logging.info(f"Skipping welcome for {event.sender} - not a first join (name change or rejoin)")
+            return
+
         # --- Cooldown check ---
         if _is_on_cooldown(event.sender):
             remaining = WELCOME_COOLDOWN_SECONDS - (