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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Time #:nodoc:
# Enables the use of time calculations within Time itself
module Calculations
def self.included(base) #:nodoc:
base.extend ClassMethods
base.class_eval do
alias_method :plus_without_duration, :+
alias_method :+, :plus_with_duration
alias_method :minus_without_duration, :-
alias_method :-, :minus_with_duration
alias_method :compare_without_coercion, :<=>
alias_method :<=>, :compare_with_coercion
end
end
COMMON_YEAR_DAYS_IN_MONTH = [nil, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
module ClassMethods
# Return the number of days in the given month.
# If no year is specified, it will use the current year.
def days_in_month(month, year = now.year)
return 29 if month == 2 && ::Date.gregorian_leap?(year)
COMMON_YEAR_DAYS_IN_MONTH[month]
end
# Returns a new Time if requested year can be accommodated by Ruby's Time class
# (i.e., if year is within either 1970..2038 or 1902..2038, depending on system architecture);
# otherwise returns a DateTime
def time_with_datetime_fallback(utc_or_local, year, month=1, day=1, hour=0, min=0, sec=0, usec=0)
::Time.send(utc_or_local, year, month, day, hour, min, sec, usec)
rescue
offset = utc_or_local.to_sym == :local ? ::DateTime.local_offset : 0
::DateTime.civil(year, month, day, hour, min, sec, offset)
end
# wraps class method time_with_datetime_fallback with utc_or_local == :utc
def utc_time(*args)
time_with_datetime_fallback(:utc, *args)
end
# wraps class method time_with_datetime_fallback with utc_or_local == :local
def local_time(*args)
time_with_datetime_fallback(:local, *args)
end
end
# Seconds since midnight: Time.now.seconds_since_midnight
def seconds_since_midnight
self.to_i - self.change(:hour => 0).to_i + (self.usec/1.0e+6)
end
# Returns a new Time where one or more of the elements have been changed according to the +options+ parameter. The time options
# (hour, minute, sec, usec) reset cascadingly, so if only the hour is passed, then minute, sec, and usec is set to 0. If the hour and
# minute is passed, then sec and usec is set to 0.
def change(options)
::Time.send(
self.utc? ? :utc_time : :local_time,
options[:year] || self.year,
options[:month] || self.month,
options[:day] || self.day,
options[:hour] || self.hour,
options[:min] || (options[:hour] ? 0 : self.min),
options[:sec] || ((options[:hour] || options[:min]) ? 0 : self.sec),
options[:usec] || ((options[:hour] || options[:min] || options[:sec]) ? 0 : self.usec)
)
end
# Uses Date to provide precise Time calculations for years, months, and days. The +options+ parameter takes a hash with
# any of these keys: :years, :months, :weeks, :days, :hours, :minutes, :seconds.
def advance(options)
d = to_date.advance(options)
time_advanced_by_date = change(:year => d.year, :month => d.month, :day => d.day)
seconds_to_advance = (options[:seconds] || 0) + (options[:minutes] || 0) * 60 + (options[:hours] || 0) * 3600
seconds_to_advance == 0 ? time_advanced_by_date : time_advanced_by_date.since(seconds_to_advance)
end
# Returns a new Time representing the time a number of seconds ago, this is basically a wrapper around the Numeric extension
# Do not use this method in combination with x.months, use months_ago instead!
def ago(seconds)
self.since(-seconds)
end
# Returns a new Time representing the time a number of seconds since the instance time, this is basically a wrapper around
# the Numeric extension. Do not use this method in combination with x.months, use months_since instead!
def since(seconds)
initial_dst = self.dst? ? 1 : 0
f = seconds.since(self)
final_dst = f.dst? ? 1 : 0
(seconds.abs >= 86400 && initial_dst != final_dst) ? f + (initial_dst - final_dst).hours : f
rescue
self.to_datetime.since(seconds)
end
alias :in :since
# Returns a new Time representing the time a number of specified months ago
def months_ago(months)
advance(:months => -months)
end
# Returns a new Time representing the time a number of specified months in the future
def months_since(months)
advance(:months => months)
end
# Returns a new Time representing the time a number of specified years ago
def years_ago(years)
advance(:years => -years)
end
# Returns a new Time representing the time a number of specified years in the future
def years_since(years)
advance(:years => years)
end
# Short-hand for years_ago(1)
def last_year
years_ago(1)
end
# Short-hand for years_since(1)
def next_year
years_since(1)
end
# Short-hand for months_ago(1)
def last_month
months_ago(1)
end
# Short-hand for months_since(1)
def next_month
months_since(1)
end
# Returns a new Time representing the "start" of this week (Monday, 0:00)
def beginning_of_week
days_to_monday = self.wday!=0 ? self.wday-1 : 6
(self - days_to_monday.days).midnight
end
alias :monday :beginning_of_week
alias :at_beginning_of_week :beginning_of_week
# Returns a new Time representing the start of the given day in next week (default is Monday).
def next_week(day = :monday)
days_into_week = { :monday => 0, :tuesday => 1, :wednesday => 2, :thursday => 3, :friday => 4, :saturday => 5, :sunday => 6}
since(1.week).beginning_of_week.since(days_into_week[day].day).change(:hour => 0)
end
# Returns a new Time representing the start of the day (0:00)
def beginning_of_day
(self - self.seconds_since_midnight).change(:usec => 0)
end
alias :midnight :beginning_of_day
alias :at_midnight :beginning_of_day
alias :at_beginning_of_day :beginning_of_day
# Returns a new Time representing the end of the day (23:59:59)
def end_of_day
change(:hour => 23, :min => 59, :sec => 59)
end
# Returns a new Time representing the start of the month (1st of the month, 0:00)
def beginning_of_month
#self - ((self.mday-1).days + self.seconds_since_midnight)
change(:day => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
end
alias :at_beginning_of_month :beginning_of_month
# Returns a new Time representing the end of the month (last day of the month, 0:00)
def end_of_month
#self - ((self.mday-1).days + self.seconds_since_midnight)
last_day = ::Time.days_in_month( self.month, self.year )
change(:day => last_day, :hour => 23, :min => 59, :sec => 59, :usec => 0)
end
alias :at_end_of_month :end_of_month
# Returns a new Time representing the start of the quarter (1st of january, april, july, october, 0:00)
def beginning_of_quarter
beginning_of_month.change(:month => [10, 7, 4, 1].detect { |m| m <= self.month })
end
alias :at_beginning_of_quarter :beginning_of_quarter
# Returns a new Time representing the start of the year (1st of january, 0:00)
def beginning_of_year
change(:month => 1,:day => 1,:hour => 0, :min => 0, :sec => 0, :usec => 0)
end
alias :at_beginning_of_year :beginning_of_year
# Convenience method which returns a new Time representing the time 1 day ago
def yesterday
self.ago(1.day)
end
# Convenience method which returns a new Time representing the time 1 day since the instance time
def tomorrow
self.since(1.day)
end
def plus_with_duration(other) #:nodoc:
if ActiveSupport::Duration === other
other.since(self)
else
plus_without_duration(other)
end
end
def minus_with_duration(other) #:nodoc:
if ActiveSupport::Duration === other
other.until(self)
else
minus_without_duration(other)
end
end
# Layers additional behavior on Time#<=> so that DateTime and ActiveSupport::TimeWithZone instances
# can be chronologically compared with a Time
def compare_with_coercion(other)
# if other is an ActiveSupport::TimeWithZone, coerce a Time instance from it so we can do <=> comparision
other = other.comparable_time if other.respond_to?(:comparable_time)
if other.acts_like?(:date)
# other is a Date/DateTime, so coerce self #to_datetime and hand off to DateTime#<=>
to_datetime.compare_without_coercion(other)
else
compare_without_coercion(other)
end
end
end
end
end
end
|
