Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Cannot retrieve contributors at this time

165 lines (138 sloc) 5.014 kb
"""Copyright 2008 Orbitz WorldWide
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License."""
from datetime import datetime,timedelta
from time import daylight
from django.conf import settings
try: # See if there is a system installation of pytz first
import pytz
except ImportError: # Otherwise we fall back to Graphite's bundled version
from graphite.thirdparty import pytz
months = ['jan','feb','mar','apr','may','jun','jul','aug','sep','oct','nov','dec']
weekdays = ['sun','mon','tue','wed','thu','fri','sat']
tzinfo = pytz.timezone(settings.TIME_ZONE)
def parseATTime(s):
s = s.strip().lower().replace('_','').replace(',','').replace(' ','')
if s.isdigit():
if len(s) == 8 and int(s[:4]) > 1900 and int(s[4:6]) < 13 and int(s[6:]) < 32:
pass #Fall back because its not a timestamp, its YYYYMMDD form
else:
return datetime.fromtimestamp(int(s),tzinfo)
if '+' in s:
ref,offset = s.split('+',1)
offset = '+' + offset
elif '-' in s:
ref,offset = s.split('-',1)
offset = '-' + offset
else:
ref,offset = s,''
return tzinfo.localize(parseTimeReference(ref), daylight) + parseTimeOffset(offset)
def parseTimeReference(ref):
if not ref or ref == 'now': return datetime.now()
#Time-of-day reference
i = ref.find(':')
hour,min = 0,0
if i != -1:
hour = int( ref[:i] )
min = int( ref[i+1:i+3] )
ref = ref[i+3:]
if ref[:2] == 'am': ref = ref[2:]
elif ref[:2] == 'pm':
hour = (hour + 12) % 24
ref = ref[2:]
if ref.startswith('noon'):
hour,min = 12,0
ref = ref[4:]
elif ref.startswith('midnight'):
hour,min = 0,0
ref = ref[8:]
elif ref.startswith('teatime'):
hour,min = 16,0
ref = ref[7:]
refDate = datetime.now().replace(hour=hour,minute=min,second=0)
#Day reference
if ref in ('yesterday','today','tomorrow'): #yesterday, today, tomorrow
if ref == 'yesterday':
refDate = refDate - timedelta(days=1)
if ref == 'tomorrow':
refDate = refDate + timedelta(days=1)
elif ref.count('/') == 2: #MM/DD/YY[YY]
m,d,y = map(int,ref.split('/'))
if y < 1900: y += 1900
if y < 1970: y += 100
refDate = refDate.replace(year=y)
try: # Fix for Bug #551771
refDate = refDate.replace(month=m)
refDate = refDate.replace(day=d)
except:
refDate = refDate.replace(day=d)
refDate = refDate.replace(month=m)
elif len(ref) == 8 and ref.isdigit(): #YYYYMMDD
refDate = refDate.replace(year= int(ref[:4]))
try: # Fix for Bug #551771
refDate = refDate.replace(month= int(ref[4:6]))
refDate = refDate.replace(day= int(ref[6:8]))
except:
refDate = refDate.replace(day= int(ref[6:8]))
refDate = refDate.replace(month= int(ref[4:6]))
elif ref[:3] in months: #MonthName DayOfMonth
refDate = refDate.replace(month= months.index(ref[:3]) + 1)
if ref[-2:].isdigit():
refDate = refDate.replace(day= int(ref[-2:]))
elif ref[-1:].isdigit():
refDate = refDate.replace(day= int(ref[-1:]))
else:
raise Exception, "Day of month required after month name"
elif ref[:3] in weekdays: #DayOfWeek (Monday, etc)
todayDayName = refDate.strftime("%a").lower()[:3]
today = weekdays.index( todayDayName )
twoWeeks = weekdays * 2
dayOffset = today - twoWeeks.index(ref[:3])
if dayOffset < 0: dayOffset += 7
refDate -= timedelta(days=dayOffset)
elif ref:
raise Exception, "Unknown day reference"
return refDate
def parseTimeOffset(offset):
if not offset:
return timedelta()
t = timedelta()
if offset[0].isdigit():
sign = 1
else:
sign = { '+' : 1, '-' : -1 }[offset[0]]
offset = offset[1:]
while offset:
i = 1
while offset[:i].isdigit() and i <= len(offset): i += 1
num = int(offset[:i-1])
offset = offset[i-1:]
i = 1
while offset[:i].isalpha() and i <= len(offset): i += 1
unit = offset[:i-1]
offset = offset[i-1:]
unitString = getUnitString(unit)
if unitString == 'months':
unitString = 'days'
num = num * 30
if unitString == 'years':
unitString = 'days'
num = num * 365
t += timedelta(**{ unitString : sign * num})
return t
def getUnitString(s):
if s.startswith('s'): return 'seconds'
if s.startswith('min'): return 'minutes'
if s.startswith('h'): return 'hours'
if s.startswith('d'): return 'days'
if s.startswith('w'): return 'weeks'
if s.startswith('mon'): return 'months'
if s.startswith('y'): return 'years'
raise Exception, "Invalid offset unit '%s'" % s
Jump to Line
Something went wrong with that request. Please try again.