/
RRule.kt
113 lines (99 loc) · 3.75 KB
/
RRule.kt
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
package com.uchan.rrule
data class RRule(
val freq: Frequency = Frequency.DAILY,
val interval: Int = 1,
val byDay: Set<Week> = emptySet(),
val byMonth: Set<Int> = emptySet(),
val byMonthDay: Set<Int> = emptySet(),
val bySetPos: Set<Int> = emptySet(),
) {
val isIntervalValid
get() = interval >= 0
val isByMonthValid
get() = byMonth.all((1..12)::contains)
val isByMonthDayValid
get() = byMonthDay.all { (-31..31).contains(it) && it != 0 }
val isBySetPosValid
get() = bySetPos.all { (-366..366).contains(it) && it != 0 }
val isValid: Boolean
get() = listOf(isIntervalValid, isByMonthValid, isByMonthDayValid, isBySetPosValid).all { it }
/**
* Converted to string for iCalendar(RFC 2445)
*/
fun toRFC5545String(): String = buildString {
append(NAME, ":")
append(FREQ, "=")
append(freq)
if (interval > 1) {
append(";", INTERVAL, "=")
append(interval)
}
if (byDay.isNotEmpty()) {
append(";", BYDAY, "=")
append(byDay.joinToString(separator = ",") { it.initial })
}
if (byMonth.isNotEmpty()) {
append(";", BYMONTH, "=")
append(byMonth.joinToString(separator = ","))
}
if (byMonthDay.isNotEmpty()) {
append(";", BYMONTHDAY, "=")
append(byMonthDay.joinToString(separator = ","))
}
if (bySetPos.isNotEmpty()) {
append(";", BYSETPOS, "=")
append(bySetPos.joinToString(separator = ","))
}
}
companion object {
private const val NAME = "RRULE"
const val FREQ = "FREQ"
const val INTERVAL = "INTERVAL"
const val BYDAY = "BYDAY"
const val BYMONTH = "BYMONTH"
const val BYMONTHDAY = "BYMONTHDAY"
const val BYSETPOS = "BYSETPOS"
/**
* Functions like secondary constructor
*/
operator fun invoke(rfc5545String: String): RRule {
var freq: Frequency = Frequency.DAILY
var interval = 1
var byDay: Set<Week> = emptySet()
var byMonth: Set<Int> = emptySet()
var byMonthDay: Set<Int> = emptySet()
var bySetPos: Set<Int> = emptySet()
val components = rfc5545String
.replace(oldValue = "$NAME:", newValue = "")
.split(";")
components.forEach { component ->
val componentPair = runCatching {
component.split("=").let { it[0] to it[1] }
}.getOrNull()
when (componentPair?.first) {
FREQ -> freq = runCatching {
enumValueOf<Frequency>(name = componentPair.second)
}.getOrDefault(defaultValue = Frequency.DAILY)
INTERVAL -> interval = componentPair.second.toInt()
BYDAY -> byDay = runCatching {
componentPair.second.mapToSet(Week::initialValueOf)
}.getOrDefault(defaultValue = emptySet())
BYMONTH -> byMonth = componentPair.second.mapToSet(String::toInt)
BYMONTHDAY -> byMonthDay = componentPair.second.mapToSet(String::toInt)
BYSETPOS -> bySetPos = componentPair.second.mapToSet(String::toInt)
}
}
return RRule(
freq = freq,
interval = interval,
byDay = byDay,
byMonth = byMonth,
byMonthDay = byMonthDay,
bySetPos = bySetPos,
)
}
private fun <R> String.mapToSet(transform: (String) -> R): Set<R> {
return split(",").map(transform).toSet()
}
}
}