1 /*
<lambda>null2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package com.android.systemui.kairos.internal
18
19 import com.android.systemui.kairos.internal.store.Single
20 import com.android.systemui.kairos.internal.store.SingletonMapK
21 import com.android.systemui.kairos.util.Maybe
22 import com.android.systemui.kairos.util.Maybe.Present
23
24 internal inline fun <A> filterPresentImpl(
25 crossinline getPulse: EvalScope.() -> EventsImpl<Maybe<A>>
26 ): EventsImpl<A> =
27 DemuxImpl(
28 mapImpl(getPulse) { maybeResult, _ ->
29 if (maybeResult is Present) {
30 Single(maybeResult.value)
31 } else {
32 Single<A>()
33 }
34 },
35 numKeys = 1,
36 storeFactory = SingletonMapK.Factory(),
37 )
38 .eventsForKey(Unit)
39
filterImplnull40 internal inline fun <A> filterImpl(
41 crossinline getPulse: EvalScope.() -> EventsImpl<A>,
42 crossinline f: EvalScope.(A) -> Boolean,
43 ): EventsImpl<A> {
44 val mapped =
45 mapImpl(getPulse) { it, _ -> if (f(it)) Maybe.present(it) else Maybe.absent }.cached()
46 return filterPresentImpl { mapped }
47 }
48