43 lines
1.1 KiB
Python
43 lines
1.1 KiB
Python
from config import V5Config
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from app.utils.unicode_names import normalize
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import re
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def valid_name(name, msg=False):
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"""
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Checks whether a string is a valid user name. The criteria are:
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1. At least 3 characters and no longer than 32 characters
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2. Only characters allowed in the [unicode_names] utility
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3. At least one letter character (avoid complete garbage)
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4. Not in forbidden user names
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Returns True if the name is valid, otherwise a list of error messages
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that can contain these errors:
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"too-short", "too-long", "cant-normalize", "no-letter", "forbidden"
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Otherwise, returns a bool.
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"""
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errors = []
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# Rule 1
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if len(name) < V5Config.USER_NAME_MINLEN:
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errors.append("too-short")
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if len(name) > V5Config.USER_NAME_MAXLEN:
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errors.append("too-long")
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# Rule 2
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try:
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normalize(name)
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except ValueError:
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errors.append("cant-normalize")
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# Rule 3
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if re.search(r'\w', name) is None:
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errors.append("no-letter")
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# Rule 4
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if name in V5Config.FORBIDDEN_USERNAMES:
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errors.append("forbidden")
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return True if errors == [] else errors
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