/
ObservableLoadingCounter.kt
56 lines (49 loc) · 1.76 KB
/
ObservableLoadingCounter.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
/*
* Copyright 2019 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package app.tivi.util
import app.tivi.base.InvokeError
import app.tivi.base.InvokeStarted
import app.tivi.base.InvokeStatus
import app.tivi.base.InvokeSuccess
import app.tivi.base.InvokeTimeout
import java.util.concurrent.atomic.AtomicInteger
import kotlinx.coroutines.channels.ConflatedBroadcastChannel
import kotlinx.coroutines.channels.sendBlocking
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.asFlow
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.flow.map
class ObservableLoadingCounter {
private val count = AtomicInteger()
private val loadingState = ConflatedBroadcastChannel(count.get())
val observable: Flow<Boolean>
get() = loadingState.asFlow().map { it > 0 }
fun addLoader() {
loadingState.sendBlocking(count.incrementAndGet())
}
fun removeLoader() {
loadingState.sendBlocking(count.decrementAndGet())
}
}
suspend fun ObservableLoadingCounter.collectFrom(statuses: Flow<InvokeStatus>) {
statuses.collect {
if (it == InvokeStarted) {
addLoader()
} else if (it == InvokeSuccess || it == InvokeTimeout || it is InvokeError) {
removeLoader()
}
}
}