-
Notifications
You must be signed in to change notification settings - Fork 1
/
ObservableZ.kt
164 lines (140 loc) · 5.63 KB
/
ObservableZ.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
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
package com.lenguyenthanh.rxarrow
import arrow.core.*
import io.reactivex.Observable
import io.reactivex.Single
import io.reactivex.annotations.CheckReturnValue
import io.reactivex.annotations.SchedulerSupport
import io.reactivex.functions.BiFunction
typealias ObservableZ<E, A> = Observable<Either<E, A>>
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.mapZ(crossinline mapper: (T) -> R): ObservableZ<E, R> {
return mapEither { mapper(it).right() }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.mapEither(crossinline mapper: (T) -> Either<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return map { it.flatMap { t -> mapper(t) } }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, T> ObservableZ<E1, T>.mapLeft(crossinline mapper: (E1) -> E2): ObservableZ<E2, T> {
return map { either -> either.mapLeft { mapper(it) } }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T> ObservableZ<E, T>.filterZ(crossinline filter: (T) -> Boolean): ObservableZ<E, T> {
return filter { either ->
either.fold({ true }, { filter(it) })
}
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.flatMapZ(crossinline mapper: (T) -> Observable<R>): ObservableZ<E, R> {
return flatMap { it.flatMapObservable(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.flatMapEither(crossinline mapper: (T) -> ObservableZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return flatMap { it.flatMapObservableEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.concatMapZ(crossinline mapper: (T) -> Observable<R>): ObservableZ<E, R> {
return concatMap { it.flatMapObservable(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.concatMapEither(crossinline mapper: (T) -> ObservableZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return concatMap { it.flatMapObservableEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.switchMapZ(crossinline mapper: (T) -> Observable<R>): ObservableZ<E, R> {
return switchMap { it.flatMapObservable(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.switchMapEither(crossinline mapper: (T) -> ObservableZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return switchMap { it.flatMapObservableEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.flatMapSingleZ(crossinline mapper: (T) -> Single<R>): ObservableZ<E, R> {
return flatMapSingle { it.flatMapSingle(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.flatMapSingleEither(crossinline mapper: (T) -> SingleZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return flatMapSingle { it.flatMapSingleEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.switchMapSingleZ(crossinline mapper: (T) -> Single<R>): ObservableZ<E, R> {
return switchMapSingle { it.flatMapSingle(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.switchMapSingleEither(crossinline mapper: (T) -> SingleZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return switchMapSingle { it.flatMapSingleEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E, T, R> ObservableZ<E, T>.concatMapSingleZ(crossinline mapper: (T) -> Single<R>): ObservableZ<E, R> {
return concatMapSingle { it.flatMapSingle(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
inline fun <E1, E2, E, T, R> ObservableZ<E1, T>.concatMapSingleEither(crossinline mapper: (T) -> SingleZ<E2, R>): ObservableZ<E, R>
where E1 : E, E2 : E {
return concatMapSingle { it.flatMapSingleEither(mapper) }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <E, T, R> ObservableZ<E, T>.scanZ(
initialValue: R,
accumulator: BiFunction<R, T, R>
): ObservableZ<E, R> {
return scan(initialValue.right() as Either<E, R>, { t1, t2 ->
t2.map { v2 -> accumulator.apply(t1.getOrElse { initialValue }, v2) }
})
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <E, T, R> ObservableZ<E, T>.scanZ(
initialValue: R,
accumulator: (R, T) -> R
): ObservableZ<E, R> {
return scan(initialValue.right() as Either<E, R>, { t1, t2 ->
t2.map { v2 -> accumulator(t1.getOrElse { initialValue }, v2) }
})
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <E, T> ObservableZ<E, T>.fix(toThrowable: (E) -> Throwable): Observable<T> {
return flatMap {
it.fold({ Observable.error<T> { toThrowable(it) } }, { Observable.just(it) })
}
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <E, T> ObservableZ<E, T>.fix(): Observable<T> where E : Throwable {
return fix(::identity)
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <E, T> Observable<T>.z(toError: (Throwable) -> E): ObservableZ<E, T> {
return map { it.right() as Either<E, T> }
.onErrorReturn { toError(it).left() }
}
@CheckReturnValue
@SchedulerSupport(SchedulerSupport.NONE)
fun <T> Observable<T>.z(): ObservableZ<Throwable, T> {
return z(::identity)
}