#!/usr/bin/python
# (C) British Crown Copyright 2018-2019 Met Office.
# All rights reserved.
#
# This file is part of TAF Monitor.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
######################################
#                                    #
#   CONSTANTS FOR CHECKING ROUTINE   #
#                                    #
######################################

import re

# Define various regular expression searches as contants that can be used
VALID_DATETIME = re.compile("[0-9]{6}" + "Z")
WIND_TERM = re.compile("[0-9VRBEC]{3}[0-9]{2}[G]{0,1}[0-9]{0,2}" + "KT")
VISIBILITY_TERM = re.compile("^[0-9]{4}$")
# Removed "-" so light precip is ignored.
WEATHER_TERM = re.compile("^[+]{0,1}[A-Z]{2,6}$")
CLOUD_TERM = re.compile("[A-Z]{2,3}[/0-9]{3}[TCUB]{0,3}")
PRESSURE_TERM = re.compile("Q" + "[0-9]{4}")
GUST_TERM = re.compile("G" + "[0-9]{2}" + "KT")
