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flight.py
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flight.py
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import re
import datetime
import wx
import airport
def string_to_datetime(string, context=datetime.datetime.now(),
airport=None):
from pytz import utc
components = string.split(' ')
date = None
time_str = None
if len(components) == 1:
date = context.date()
time_str = components[0]
elif len(components) == 2:
time_str = components[1]
if components[0].count('/') == 1:
date = datetime.datetime.strptime(components[0], '%m/%d').\
replace(year=context.year).date()
elif components[0].count('/') == 2:
year_len = len(components[0]) - components[0].rfind('/') - 1
if year_len == 4:
date = datetime.datetime.strptime(components[0],
'%m/%d/%Y').date()
elif year_len == 2:
date = datetime.datetime.strptime(components[0],
'%m/%d/%y').date()
time = None
if ':' in time_str:
time = datetime.datetime.strptime(time_str, '%H:%M').time()
else:
time = datetime.datetime.strptime(time_str, '%H%M').time()
result = datetime.datetime.combine(date, time)
if airport:
return airport.timezone.localize(result)
else:
return utc.localize(result)
def datetime_to_wx(date):
return wx.DateTimeFromDMY(date.day, date.month - 1, date.year,
date.hour, date.minute, date.second,
date.microsecond / 1000)
def format_date(date):
return date.Format('%m/%d/%y')
def format_time(time):
return time.Format('%H%M')
def from_line(line, context=None):
if context is None:
context = datetime.datetime.now()
return Flight(**_build_objects(parse_line(line), context))
def _build_objects(components, context):
pairs = {'departs': 'dept_time', 'arrives': 'arr_time'}
for key in pairs:
components[key] = airport.get_airport(components[key])
components[pairs[key]] = string_to_datetime(components[pairs[key]],
context, components[key])
return components
def parse_line(line):
date = r'\d{1,2}/\d{1,2}(/\d{2}(\d{2})?)?'
time = r'\d{1,2}:?\d{2}'
airport_code = r'[A-Za-z]{3}'
flight_number = r'\d{2,5}'
departs = r'(?P<departs>' + airport_code + r')'
arrives = r'(?P<arrives>' + airport_code + r')'
dept_date = r'(?P<dept_date>' + date + r')'
dept_time = r'(?P<dept_time>' + time + r')'
arr_date = r'(?P<arr_date>' + date + r')'
arr_time = r'(?P<arr_time>' + time + r')'
date_formats = [
' '.join((dept_date, departs, dept_time, arrives, arr_time)),
' '.join((departs, dept_date, dept_time, arrives, arr_date,
arr_time)),
' '.join((departs, dept_date, dept_time, arrives, arr_time)),
' '.join((dept_date, flight_number, departs, dept_time, arrives,
arr_time)),
]
date_formats = [re.compile(f) for f in date_formats]
for date_format in date_formats:
match = date_format.match(line)
if match:
return _extract_from_match(match)
raise ValueError('"%s" doesn\'t match any of the accepted formats.' %
line)
def _extract_from_match(match):
departs = match.group('departs')
arrives = match.group('arrives')
dept_time = ' '.join((match.group('dept_date'),
match.group('dept_time')))
try:
arr_time = ' '.join((match.group('arr_date'),
match.group('arr_time')))
except IndexError:
arr_time = ' '.join((match.group('dept_date'),
match.group('arr_time')))
return {
'departs': departs,
'arrives': arrives,
'dept_time': dept_time,
'arr_time': arr_time
}
class Flight(object):
def __init__(self, departs, dept_time, arrives, arr_time):
self.departs = departs
self.arrives = arrives
self._dept_time = dept_time
self._arr_time = arr_time
self._listeners = []
def _get_dept_time(self):
return self._dept_time
def _set_dept_time(self, dept_time):
self._dept_time = dept_time
self.update()
dept_time = property(_get_dept_time, _set_dept_time)
def _get_arr_time(self):
return self._arr_time
def _set_arr_time(self, arr_time):
self._arr_time = arr_time
self.update()
arr_time = property(_get_arr_time, _set_arr_time)
def assign(self, other):
(self.arrives, self.departs,
self.arr_time, self.dept_time) = (other.arrives, other.departs,
other.arr_time, other.dept_time)
def report(self, schedule):
lines = [('%s–%s departs <b>%s</b> arrives <b>%s</b> ' +
'<i>[%s]</i>') % (
self.departs,
self.arrives,
self.dept_time.strftime('%x %H%M (%Z)'),
self.arr_time.strftime('%x %H%M (%Z)'),
self.length(),
)]
import legality
legal, status = legality.check(self, schedule)
for status_line in status:
lines.append(' <small>' + status_line +
'</small>')
font_color = 'green' if legal else 'red'
return '<font color="' + font_color + '">' + \
'<br />'.join(lines) + '</font>'
def length(self):
return self.arr_time - self.dept_time
def add_listener(self, listener):
self._listeners.append(listener)
def update(self):
for listener in self._listeners:
listener.update(self)
def __repr__(self):
return "Flight('%s')" % str(self)
def __str__(self):
return '%s %s %s %s' % (
self.departs,
self.dept_time.strftime('%x %H%M'),
self.arrives,
self.arr_time.strftime('%x %H%M'),
)
def __cmp__(self, other):
return cmp(self.dept_time, other.dept_time)
@classmethod
def copy_of(cls, other):
return Flight(other.departs, other.dept_time,
other.arrives, other.arr_time)