2015-10-03 01:23:14 -04:00
|
|
|
from datetime import date, datetime, timedelta
|
|
|
|
from dateutil.parser import parse
|
2015-09-26 18:53:37 -04:00
|
|
|
import hashlib
|
2015-09-11 18:32:42 -04:00
|
|
|
from sqlalchemy.types import TypeDecorator, TEXT
|
|
|
|
import json
|
2015-07-16 20:55:36 -04:00
|
|
|
import parsedatetime
|
2015-09-17 21:06:03 -04:00
|
|
|
import functools
|
|
|
|
|
|
|
|
|
|
|
|
class memoized(object):
|
|
|
|
"""Decorator that caches a function's return value each time it is called.
|
|
|
|
If called later with the same arguments, the cached value is returned, and
|
|
|
|
not re-evaluated.
|
|
|
|
"""
|
|
|
|
def __init__(self, func):
|
|
|
|
self.func = func
|
|
|
|
self.cache = {}
|
|
|
|
def __call__(self, *args):
|
|
|
|
try:
|
|
|
|
return self.cache[args]
|
|
|
|
except KeyError:
|
|
|
|
value = self.func(*args)
|
|
|
|
self.cache[args] = value
|
|
|
|
return value
|
|
|
|
except TypeError:
|
|
|
|
# uncachable -- for instance, passing a list as an argument.
|
|
|
|
# Better to not cache than to blow up entirely.
|
|
|
|
return self.func(*args)
|
|
|
|
def __repr__(self):
|
|
|
|
"""Return the function's docstring."""
|
|
|
|
return self.func.__doc__
|
|
|
|
def __get__(self, obj, objtype):
|
|
|
|
"""Support instance methods."""
|
|
|
|
return functools.partial(self.__call__, obj)
|
2015-07-15 13:12:32 -04:00
|
|
|
|
|
|
|
|
2015-07-16 20:55:36 -04:00
|
|
|
def parse_human_datetime(s):
|
|
|
|
"""
|
|
|
|
Use the parsedatetime lib to return ``datetime.datetime`` from human
|
|
|
|
generated strings
|
|
|
|
|
2015-10-03 01:23:14 -04:00
|
|
|
>>> parse_human_datetime('2015-04-03')
|
|
|
|
datetime.datetime(2015, 4, 3, 0, 0)
|
|
|
|
>>> parse_human_datetime('2/3/1969')
|
|
|
|
datetime.datetime(1969, 2, 3, 0, 0)
|
2015-07-16 20:55:36 -04:00
|
|
|
>>> parse_human_datetime("now") <= datetime.now()
|
|
|
|
True
|
2015-10-03 01:23:14 -04:00
|
|
|
>>> parse_human_datetime("yesterday") <= datetime.now()
|
|
|
|
>>> date.today() - timedelta(1) == parse_human_datetime('yesterday').date()
|
|
|
|
True
|
2015-07-16 20:55:36 -04:00
|
|
|
"""
|
2015-10-03 01:23:14 -04:00
|
|
|
try:
|
|
|
|
dttm = parse(s)
|
|
|
|
except:
|
|
|
|
cal = parsedatetime.Calendar()
|
|
|
|
dttm = dttm_from_timtuple(cal.parse(s)[0])
|
|
|
|
return dttm
|
2015-07-17 02:46:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
def dttm_from_timtuple(d):
|
2015-07-16 20:55:36 -04:00
|
|
|
return datetime(
|
|
|
|
d.tm_year, d.tm_mon, d.tm_mday, d.tm_hour, d.tm_min, d.tm_sec)
|
2015-07-17 02:46:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
def parse_human_timedelta(s):
|
|
|
|
"""
|
|
|
|
Use the parsedatetime lib to return ``datetime.datetime`` from human
|
|
|
|
generated strings
|
|
|
|
|
|
|
|
>>> parse_human_datetime("now") <= datetime.now()
|
|
|
|
True
|
|
|
|
"""
|
|
|
|
cal = parsedatetime.Calendar()
|
|
|
|
dttm = dttm_from_timtuple(datetime.now().timetuple())
|
|
|
|
d = cal.parse(s, dttm)[0]
|
|
|
|
d = datetime(
|
|
|
|
d.tm_year, d.tm_mon, d.tm_mday, d.tm_hour, d.tm_min, d.tm_sec)
|
|
|
|
return d - dttm
|
2015-09-11 18:32:42 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class JSONEncodedDict(TypeDecorator):
|
|
|
|
"""Represents an immutable structure as a json-encoded string."""
|
|
|
|
impl = TEXT
|
|
|
|
def process_bind_param(self, value, dialect):
|
|
|
|
if value is not None:
|
|
|
|
value = json.dumps(value)
|
|
|
|
|
|
|
|
return value
|
|
|
|
|
|
|
|
def process_result_value(self, value, dialect):
|
|
|
|
if value is not None:
|
|
|
|
value = json.loads(value)
|
|
|
|
return value
|
2015-09-26 18:53:37 -04:00
|
|
|
|
|
|
|
def color(s):
|
|
|
|
"""
|
|
|
|
Get a consistent color from the same string using a hash function
|
|
|
|
|
|
|
|
>>> color("foo")
|
|
|
|
'#FF5A5F'
|
|
|
|
"""
|
|
|
|
colors = [
|
2015-09-28 03:51:39 -04:00
|
|
|
"#FF5A5F", "#007A87", "#7B0051", "#00D1C1", "#8CE071", "#FFB400",
|
|
|
|
"#FFAA91", "#B4A76C", "#9CA299", "#565A5C",
|
|
|
|
"#A14D83", "#4FA3AB", "#4EDED2", "#4EDED2", "#FFCA4F", "#FFC4B3",
|
|
|
|
"#C9BF97", "#C9BF97", "#898C8C",
|
2015-09-26 18:53:37 -04:00
|
|
|
]
|
|
|
|
h = hashlib.md5(s)
|
|
|
|
i = int(h.hexdigest(), 16)
|
|
|
|
return colors[i % len(colors)]
|