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
|
#!/usr/bin/perl -w
use strict;
use Test::More;
plan tests => 8;
use DateTime;
use DateTime::Duration;
use DateTime::SpanSet;
use DateTime::Span;
use DateTime::Set;
# use warnings;
#======================================================================
# add duration to recurrence
#======================================================================
use constant INFINITY => 100 ** 100 ** 100 ;
use constant NEG_INFINITY => -1 * (100 ** 100 ** 100);
my $res;
my $t1 = new DateTime( year => '1810', month => '08', day => '22' );
my $t2 = new DateTime( year => '1810', month => '11', day => '24' );
my $s1 = DateTime::Set->from_datetimes( dates => [ $t1, $t2 ] );
my $dur = new DateTime::Duration( hours => 1 );
my $month_callback = sub {
$_[0]->truncate( to => 'month' )
->add( months => 1 );
};
{
# "START"
my $months = DateTime::Set->from_recurrence(
recurrence => $month_callback,
start => $t1,
);
$res = $months->min;
$res = $res->ymd if ref($res);
ok( $res eq '1810-09-01',
"min() - got $res" );
$res = $months->clone->add_duration( $dur )->min;
$res = $res->datetime if ref($res);
ok( $res eq '1810-09-01T01:00:00',
"min() - got $res" );
# TODO:
{
# local $TODO = "backtracking add()";
# BACKTRACKING
my $span = new DateTime::Span(
start => new DateTime(
year => 1810, month => 9, day => 1, hour => 0, minute => 30 ),
end => new DateTime(
year => 1810, month => 9, day => 1, hour => 1, minute => 30 ),
);
my $set = $months->clone->add_duration( $dur )->intersection( $span );
my $res = $set->min;
$res = $res->datetime if ref($res);
$res = 'undef' unless $res;
ok( $res eq '1810-09-01T01:00:00',
"span intersection, add - got ".$res );
}
# TODO:
{
# local $TODO = "backtracking subtract()";
# BACKTRACKING
my $span = new DateTime::Span(
start => new DateTime(
year => 1810, month => 9, day => 30, hour => 22, minute => 30 ),
end => new DateTime(
year => 1810, month => 9, day => 30, hour => 23, minute => 30 ),
);
my $set = $months->subtract_duration( $dur )->intersection( $span );
my $res = $set->min;
$res = $res->datetime if ref($res);
$res = 'undef' unless $res;
ok( $res eq '1810-09-30T23:00:00',
"span intersection, subtract - got ".$res );
}
}
{
# INTERSECTION
my $months = DateTime::Set->from_recurrence(
recurrence => $month_callback,
);
$res = $months->intersection(
DateTime::Span->from_datetimes( after => $t1 )
)->min;
$res = $res->ymd if ref($res);
ok( $res eq '1810-09-01',
"min() - got $res" );
# diag( " after " . $t1->datetime );
$res = $months->clone->add_duration( $dur )
->intersection(
DateTime::Span->from_datetimes( after => $t1 )
);
$res = $res->min;
$res = $res->datetime if ref($res);
ok( $res eq '1810-09-01T01:00:00',
"min() - got $res" );
}
#======================================================================
# create spanset by adding duration to recurrence
#======================================================================
{
# SPANSET FROM RECURRENCE AND DURATION
my $months = DateTime::Set->from_recurrence(
recurrence => $month_callback,
);
my $spans = DateTime::SpanSet->from_set_and_duration(
set => $months,
duration => $dur
);
$res = $spans->intersection(
DateTime::Span->from_datetimes( after => $t1 )
);
# this was written step-by-step to help debugging
my $first_span = $res->{set}->first;
$res = $first_span->min;
$res = $res->datetime if ref($res);
ok( $res eq '1810-09-01T00:00:00',
"min() - got $res" );
$res = $first_span->max;
$res = $res->datetime if ref($res);
ok( $res eq '1810-09-01T01:00:00',
"max() - got $res" );
}
1;
|
