mirror of
https://github.com/google/glazier.git
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83 lines
2.3 KiB
Python
83 lines
2.3 KiB
Python
# Copyright 2016 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Glazier user interaction."""
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from __future__ import absolute_import
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from __future__ import print_function
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import logging
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import re
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import time
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from six.moves import input
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def GetUsername():
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"""Prompt the user for their username.
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Returns:
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The username string entered by the user.
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"""
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username = False
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while not username:
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username = Prompt('Please enter your username: ',
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validator='^[a-zA-Z0-9]+$')
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return username
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def Keystroke(message, validator='.*', timeout=30):
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"""Prompts the user for a keystroke and waits the specified amount of time.
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Args:
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message: the prompt message displayed to the user
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validator: a regular expression to validate any responses
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timeout: the length of time in seconds to wait for a response
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Returns:
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String of the character input from the user that matched input_regex.
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"""
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import msvcrt # pylint: disable=g-import-not-at-top
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print(message)
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i = 0
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kbhit = False
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while i < timeout and not kbhit:
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kbhit = msvcrt.kbhit()
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i += 1
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time.sleep(1)
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if kbhit:
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response = msvcrt.getch()
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result = re.match(validator, response)
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if result:
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logging.debug('Matched user input, %s, as a valid input.', response)
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return response
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logging.debug('No input from user prior to timeout.')
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return None
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def Prompt(message, validator='.*'):
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"""Prompt the user for input.
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Args:
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message: the prompt message displayed to the user
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validator: a regular expression to validate any responses
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Returns:
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a response string if successful, else None
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"""
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response = input(message)
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if not re.match(validator, response):
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logging.error('Invalid response entered.')
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return None
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return response
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