Ability to tether objects

This allows a user to get something, but if they leave an area, they
automatically put it back.

typeclasses/characters.py

@@ -15,6 +15,8 @@ from utils.word_list import Token, routput
 from .objects import Object
 from .tutorial import TutorBird, TutorialState
 
+from re import match
+
 INTRO = """
 As the surrounding mists dissipate, you find yourself in an ancient, halcyon forest dripping with moss. You see an envelope of parchment wedged under a scaly protrusion of bark...inside, a letter in familiar penmanship, personally addressed to you, which you pick up.
 
@@ -93,7 +95,7 @@ class Character(Object, DefaultCharacter):
                     thing.move_to(self, quiet=True, use_destination=True)
                     return
 
-                self.msg(f"{victim.key} doesn't have a {to_take}.")
+                self.msg(f"{victim.key} doesn't have a {to_take} you can take.")
             else:
                 self.msg(f"You don't see {from_whom}.")
 
@@ -107,6 +109,25 @@ class Character(Object, DefaultCharacter):
         if self.db.is_sitting:
             self.msg("You stand up first...")
             self.db.is_sitting = False;
+
+        # @lock thing = tethered:id(#19)
+        # @set thing/tethered_msg = "Let's put that back"
+        for thing in self.contents:
+            to = thing.locks.get('tethered')
+            if to:
+                m = match(r".*:id\(#?(.*)\)", to)
+                if m:
+                    id_num = m.group(1)
+                    dest = self.global_search(f"#{id_num}")
+                    msg = thing.db.tethered_msg
+                    if dest and msg:
+                        thing.location = dest
+                        self.msg(msg)
+                    else:
+                        print(f"Found tethered, {thing} to #{id_num}, but dest is {dest} and msg is '{msg}'. Set both.")
+                else:
+                    print(f"Found tethered, {thing} to #{to}, but that needs to be 'tethered:id(num) where num is the ID# of an object/place.")
+
         return super().at_pre_move(destination)
 
     def at_pre_say(self, message, **kwargs):

typeclasses/things.py

@@ -204,7 +204,7 @@ class Knocker(Object):
         # Let's see if a keyword gives a good response:
         for idx, [regex, responses] in enumerate(self.all_responses):
             full_regex = r".*" + regex + r".*"
-            if re.match(full_regex, message):
+            if re.match(full_regex, message, re.IGNORECASE):
                 # The first match is the password, so we set a tag on
                 # the character, so that they can go through the door:
                 if idx == 0: