Undertale name prompt

undertale.py

#!/usr/bin/env python3
"""
Undertale name prompt
Copyright (C) 2025 ÐarkbloøM
All rights reserved.
"""

import re

FORBIDDEN = {
  "Alphys": "D-don't do that.",
  "Asgore": "You cannot.",
  "Asriel": "...",
  "Flowey": "I already CHOSE that name.",
  "Sans":   "nope.",
  "Toriel": "I think you should think of your own name, my child.",
  "Undyne": "Get your OWN name!"
}
ALLOWED = {
  "Frisk":          "WARNING: This name will make your life hell. Proceed anyway?",
  "Murder|Mercy":   "That's a little on-the-nose, isn't it...?",
  "a+":             "Not very creative...?",
  "Aaron":          "Is this name correct? ;)",
  "Alphy":          "Uh.... OK?",
  "Catty":          "Bratty! Bratty! That's MY name!",
  "Bratty":         "Like, OK I guess.",
  "Bpants":         "You are really scraping the bottom of the barrel.",
  "Chara":          "The true name.",
  "DarkblooM":      "Ayup.",
  "Gerson":         "Wah ha ha! Why not?",
  "Jerry":          "Jerry.",
  "Metta|Mett|Mtt": "OOOOH!!! ARE YOU PROMOTING MY BRAND?",
  "Napsta|Blooky":  "............ (They are powerless to stop you.)",
  "Papyru":         "I'LL ALLOW IT!!!!",
  "Shyren":         "...?",
  "Temmie":         "hOI!",
  "Woshua":         "Clean name."
}

def validateName(name: str) -> bool:
  for e in FORBIDDEN:
    if re.match(f"^(?:{e})$", name, re.IGNORECASE):
      print(FORBIDDEN[e])
      return False
  return True

def main() -> None:
  while True:
    try:
      name = input("Name the fallen human: ").strip()

      if name == "":
        print("You must choose a name.")
        continue

      if not validateName(name):
        continue

      msg = "Is this name correct?"

      for e in ALLOWED:
        if re.match(f"^(?:{e})$", name, re.IGNORECASE):
          msg = ALLOWED[e]

      if input(f"{msg} [Y/n] ").strip().lower() not in ["yes","y",""]:
        continue

      print(f"Your name is {name}.")
      return

    except (EOFError, KeyboardInterrupt):
      print("")
      return

if __name__ == "__main__":
  main()