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
|
package gronx
import (
"fmt"
"strconv"
"strings"
"time"
)
// Checker is interface for cron segment due check.
type Checker interface {
GetRef() time.Time
SetRef(ref time.Time)
CheckDue(segment string, pos int) (bool, error)
}
// SegmentChecker is factory implementation of Checker.
type SegmentChecker struct {
ref time.Time
}
// GetRef returns the current reference time
func (c *SegmentChecker) GetRef() time.Time {
return c.ref
}
// SetRef sets the reference time for which to check if a cron expression is due.
func (c *SegmentChecker) SetRef(ref time.Time) {
c.ref = ref
}
// CheckDue checks if the cron segment at given position is due.
// It returns bool or error if any.
func (c *SegmentChecker) CheckDue(segment string, pos int) (due bool, err error) {
ref, last := c.GetRef(), -1
val, loc := valueByPos(ref, pos), ref.Location()
isMonthDay, isWeekDay := pos == 3, pos == 5
for _, offset := range strings.Split(segment, ",") {
mod := (isMonthDay || isWeekDay) && strings.ContainsAny(offset, "LW#")
if due, err = c.isOffsetDue(offset, val, pos); due || (!mod && err != nil) {
return
}
if !mod {
continue
}
if last == -1 {
last = time.Date(ref.Year(), ref.Month(), 1, 0, 0, 0, 0, loc).AddDate(0, 1, 0).Add(-time.Second).Day()
}
if isMonthDay {
due, err = isValidMonthDay(offset, last, ref)
} else if isWeekDay {
due, err = isValidWeekDay(offset, last, ref)
}
if due || err != nil {
return due, err
}
}
return false, nil
}
func (c *SegmentChecker) isOffsetDue(offset string, val, pos int) (bool, error) {
if offset == "*" || offset == "?" {
return true, nil
}
bounds, isWeekDay := boundsByPos(pos), pos == 5
if strings.Contains(offset, "/") {
return inStep(val, offset, bounds)
}
if strings.Contains(offset, "-") {
if isWeekDay {
offset = strings.Replace(offset, "7-", "0-", 1)
}
return inRange(val, offset, bounds)
}
nval, err := strconv.Atoi(offset)
if err != nil {
return false, err
}
if nval < bounds[0] || nval > bounds[1] {
return false, fmt.Errorf("segment#%d: '%s' out of bounds(%d, %d)", pos, offset, bounds[0], bounds[1])
}
if !isWeekDay && (val == 0 || nval == 0) {
return nval == 0 && val == 0, nil
}
return nval == val || (isWeekDay && nval == 7 && val == 0), nil
}
func valueByPos(ref time.Time, pos int) (val int) {
switch pos {
case 0:
val = ref.Second()
case 1:
val = ref.Minute()
case 2:
val = ref.Hour()
case 3:
val = ref.Day()
case 4:
val = int(ref.Month())
case 5:
val = int(ref.Weekday())
case 6:
val = ref.Year()
}
return
}
func boundsByPos(pos int) (bounds []int) {
bounds = []int{0, 0}
switch pos {
case 0, 1:
bounds = []int{0, 59}
case 2:
bounds = []int{0, 23}
case 3:
bounds = []int{1, 31}
case 4:
bounds = []int{1, 12}
case 5:
bounds = []int{0, 7}
case 6:
bounds = []int{0, 9999}
}
return
}
|
