1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
"""
This module contains the expressions applicable for CronTrigger's fields.
"""
from calendar import monthrange
import re
from apscheduler.util import asint
__all__ = ('AllExpression', 'RangeExpression', 'WeekdayRangeExpression',
'WeekdayPositionExpression')
WEEKDAYS = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
class AllExpression(object):
value_re = re.compile(r'\*(?:/(?P<step>\d+))?$')
def __init__(self, step=None):
self.step = asint(step)
if self.step == 0:
raise ValueError('Increment must be higher than 0')
def get_next_value(self, date, field):
start = field.get_value(date)
minval = field.get_min(date)
maxval = field.get_max(date)
start = max(start, minval)
if not self.step:
next = start
else:
distance_to_next = (self.step - (start - minval)) % self.step
next = start + distance_to_next
if next <= maxval:
return next
def __str__(self):
if self.step:
return '*/%d' % self.step
return '*'
def __repr__(self):
return "%s(%s)" % (self.__class__.__name__, self.step)
class RangeExpression(AllExpression):
value_re = re.compile(
r'(?P<first>\d+)(?:-(?P<last>\d+))?(?:/(?P<step>\d+))?$')
def __init__(self, first, last=None, step=None):
AllExpression.__init__(self, step)
first = asint(first)
last = asint(last)
if last is None and step is None:
last = first
if last is not None and first > last:
raise ValueError('The minimum value in a range must not be '
'higher than the maximum')
self.first = first
self.last = last
def get_next_value(self, date, field):
start = field.get_value(date)
minval = field.get_min(date)
maxval = field.get_max(date)
# Apply range limits
minval = max(minval, self.first)
if self.last is not None:
maxval = min(maxval, self.last)
start = max(start, minval)
if not self.step:
next = start
else:
distance_to_next = (self.step - (start - minval)) % self.step
next = start + distance_to_next
if next <= maxval:
return next
def __str__(self):
if self.last != self.first and self.last is not None:
range = '%d-%d' % (self.first, self.last)
else:
range = str(self.first)
if self.step:
return '%s/%d' % (range, self.step)
return range
def __repr__(self):
args = [str(self.first)]
if self.last != self.first and self.last is not None or self.step:
args.append(str(self.last))
if self.step:
args.append(str(self.step))
return "%s(%s)" % (self.__class__.__name__, ', '.join(args))
class WeekdayRangeExpression(RangeExpression):
value_re = re.compile(r'(?P<first>[a-z]+)(?:-(?P<last>[a-z]+))?',
re.IGNORECASE)
def __init__(self, first, last=None):
try:
first_num = WEEKDAYS.index(first.lower())
except ValueError:
raise ValueError('Invalid weekday name "%s"' % first)
if last:
try:
last_num = WEEKDAYS.index(last.lower())
except ValueError:
raise ValueError('Invalid weekday name "%s"' % last)
else:
last_num = None
RangeExpression.__init__(self, first_num, last_num)
def __str__(self):
if self.last != self.first and self.last is not None:
return '%s-%s' % (WEEKDAYS[self.first], WEEKDAYS[self.last])
return WEEKDAYS[self.first]
def __repr__(self):
args = ["'%s'" % WEEKDAYS[self.first]]
if self.last != self.first and self.last is not None:
args.append("'%s'" % WEEKDAYS[self.last])
return "%s(%s)" % (self.__class__.__name__, ', '.join(args))
class WeekdayPositionExpression(AllExpression):
options = ['1st', '2nd', '3rd', '4th', '5th', 'last']
value_re = re.compile(r'(?P<option_name>%s) +(?P<weekday_name>(?:\d+|\w+))'
% '|'.join(options), re.IGNORECASE)
def __init__(self, option_name, weekday_name):
try:
self.option_num = self.options.index(option_name.lower())
except ValueError:
raise ValueError('Invalid weekday position "%s"' % option_name)
try:
self.weekday = WEEKDAYS.index(weekday_name.lower())
except ValueError:
raise ValueError('Invalid weekday name "%s"' % weekday_name)
def get_next_value(self, date, field):
# Figure out the weekday of the month's first day and the number
# of days in that month
first_day_wday, last_day = monthrange(date.year, date.month)
# Calculate which day of the month is the first of the target weekdays
first_hit_day = self.weekday - first_day_wday + 1
if first_hit_day <= 0:
first_hit_day += 7
# Calculate what day of the month the target weekday would be
if self.option_num < 5:
target_day = first_hit_day + self.option_num * 7
else:
target_day = first_hit_day + ((last_day - first_hit_day) / 7) * 7
if target_day <= last_day and target_day >= date.day:
return target_day
def __str__(self):
return '%s %s' % (self.options[self.option_num],
WEEKDAYS[self.weekday])
def __repr__(self):
return "%s('%s', '%s')" % (self.__class__.__name__,
self.options[self.option_num],
WEEKDAYS[self.weekday])
|
