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feat: Added caches to business logic
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api/core/src/commonMain/kotlin/cz/lastaapps/api/core/domain/FlowParametrizedCache.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /* | ||
| * Copyright 2025, Petr Laštovička as Lasta apps, All rights reserved | ||
| * | ||
| * This file is part of Menza. | ||
| * | ||
| * Menza is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Menza is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with Menza. If not, see <https://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package cz.lastaapps.api.core.domain | ||
|
|
||
| import arrow.core.None | ||
| import arrow.core.Option | ||
| import arrow.core.Some | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.cancel | ||
| import kotlinx.coroutines.flow.Flow | ||
| import kotlinx.coroutines.flow.SharingStarted | ||
| import kotlinx.coroutines.flow.shareIn | ||
| import kotlinx.coroutines.sync.Mutex | ||
| import kotlinx.coroutines.sync.withLock | ||
| import kotlin.coroutines.CoroutineContext | ||
|
|
||
| // Now I would really love to have traits | ||
| class FlowParametrizedCache<T, Param>( | ||
| private val coroutineContext: CoroutineContext = Dispatchers.Default, | ||
| ) { | ||
| private var cacheLastParam: Option<Triple<Param, Flow<T>, CoroutineScope>> = None | ||
| private val cacheMutex: Mutex = Mutex() | ||
|
|
||
| suspend operator fun invoke( | ||
| params: Param, | ||
| block: suspend (param: Param) -> Flow<T>, | ||
| ): Flow<T> = | ||
| cacheMutex.withLock { | ||
| when (val param = cacheLastParam) { | ||
| is Some if (param.value.first == params) -> param.value.second | ||
| else -> { | ||
| param.getOrNull()?.third?.cancel() | ||
| val scope = CoroutineScope(coroutineContext) | ||
| block(params) | ||
| .shareIn(scope, SharingStarted.Eagerly, replay = 1) | ||
| .also { data -> | ||
| cacheLastParam = Some(Triple(params, data, scope)) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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49 changes: 49 additions & 0 deletions
49
api/main/src/commonMain/kotlin/cz/lastaapps/api/main/domain/usecase/GetTodayRawDishListUC.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Copyright 2025, Petr Laštovička as Lasta apps, All rights reserved | ||
| * | ||
| * This file is part of Menza. | ||
| * | ||
| * Menza is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Menza is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with Menza. If not, see <https://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package cz.lastaapps.api.main.domain.usecase | ||
|
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| import cz.lastaapps.api.core.domain.FlowParametrizedCache | ||
| import cz.lastaapps.api.core.domain.model.MenzaType | ||
| import cz.lastaapps.api.core.domain.model.dish.DishCategory | ||
| import cz.lastaapps.api.core.domain.repo.TodayDishRepo | ||
| import cz.lastaapps.api.core.domain.sync.getData | ||
| import cz.lastaapps.core.domain.UCContext | ||
| import cz.lastaapps.core.domain.UseCase | ||
| import kotlinx.collections.immutable.ImmutableList | ||
| import kotlinx.coroutines.flow.Flow | ||
| import org.koin.core.component.KoinComponent | ||
| import org.koin.core.component.get | ||
| import org.koin.core.parameter.parametersOf | ||
|
|
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| internal class GetTodayRawDishListUC internal constructor( | ||
| context: UCContext, | ||
| private val getRequestParamsUC: GetRequestParamsUC, | ||
| ) : UseCase(context), | ||
| KoinComponent { | ||
| private val cache = FlowParametrizedCache<ImmutableList<DishCategory>, MenzaType>() | ||
|
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| suspend operator fun invoke(menza: MenzaType): Flow<ImmutableList<DishCategory>> = | ||
| launch { | ||
| cache(menza) { menza -> | ||
| get<TodayDishRepo> { parametersOf(menza) } | ||
| .getData(getRequestParamsUC()) | ||
| } | ||
| } | ||
| } |
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