Add @everyone example

examples/mention_everyone.py

@@ -0,0 +1,36 @@
+"""
+This script allows you to do @everyone,
+just like on Discord, but on messenger!
+You can use it on your personal or separate account
+(but this account needs to be added to group, obviously).
+"""
+
+import fbchat
+
+session = fbchat.Session.login("<email", "<password>")
+
+listener = fbchat.Listener.connect(session, chat_on=False, foreground=False)
+
+
+def on_message(event):
+    print(f"{event.message.text} from {event.author.id} in {event.thread.id}")
+    thread = event.thread
+    if not isinstance(thread, fbchat.Group):
+        # Skip if it's not group
+        return
+    if event.message.text.lower() == "@everyone":
+        mentions = []
+        message = ""
+        # TODO: Get group's participants and add their mentions
+        for user in participants:
+            username = ""  # TODO
+            message += username + " "
+            mentions.append(
+                fbchat.Mention(thread.id, offset=len(message), lenght=len(username))
+            )
+        thread.send_text(message, mentions=mentions)
+
+
+for event in listener.listen():
+    if isinstance(event, fbchat.MessageEvent):
+        on_message(event)