InsanusMokrassar/TelegramBotApiLibraries
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fixes in architecture and adding playable main

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This commit is contained in:
InsanusMokrassar 2021-06-19 02:20:47 +06:00
parent 6f17a53146
commit c4e18ad25f
7 changed files with 167 additions and 113 deletions
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4
fsm/core/src/commonMain/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/StateHandlerHolder.kt
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@ -4,8 +4,8 @@ import kotlin.reflect.KClass
class StateHandlerHolder<I : State, O : State>(
private val inputKlass: KClass<I>,
private val delegateTo: StatesHandler<I, O>,
private val strict: Boolean = false
private val strict: Boolean = false,
private val delegateTo: StatesHandler<I, O>
) : StatesHandler<State, O> {
fun checkHandleable(state: State) = state::class == inputKlass || (!strict && inputKlass.isInstance(state))

48
fsm/core/src/commonMain/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/StatesHolder.kt
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@ -1,48 +0,0 @@
package dev.inmo.tgbotapi.libraries.fsm.core
import kotlinx.coroutines.channels.BufferOverflow
import kotlinx.coroutines.flow.*
interface StatesHolder<T : State> {
val onNewState: Flow<T>
val onStateRemoved: Flow<T>
/**
* Must always save [state] inside of [this] [StatesHolder] AND send event in [onNewState]
*/
suspend fun saveState(state: T)
/**
* Must always remove [state] in case it is stored AND send event in [onStateRemoved] if it was removed
*/
suspend fun removeState(state: T)
/**
* Must returns currently stored states
*/
suspend fun loadStates(): List<T>
}
class ListBasedStatesHolder<T : State>(
base: List<T> = emptyList()
) : StatesHolder<T> {
private val data: MutableList<T> = base.toMutableList()
private val _onNewState = MutableSharedFlow<T>(0, onBufferOverflow = BufferOverflow.SUSPEND)
override val onNewState: Flow<T> = _onNewState.asSharedFlow()
private val _onStateRemoved = MutableSharedFlow<T>(0, onBufferOverflow = BufferOverflow.SUSPEND)
override val onStateRemoved: Flow<T> = _onStateRemoved.asSharedFlow()
override suspend fun saveState(state: T) {
data.add(state)
_onNewState.emit(state)
}
override suspend fun removeState(state: T) {
if (data.remove(state)) {
_onStateRemoved.emit(state)
}
}
override suspend fun loadStates(): List<T> = data.toList()
}

29
fsm/core/src/commonMain/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/StatesMachine.kt
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@ -14,22 +14,31 @@ private suspend fun <I : State, O : State> launchStateHandling(
}
class StatesMachine<T : State, I : T, O : T>(
private val statesHolder: StatesHolder<T>,
private val statesQuotaManager: StatesQuotaManager,
private val statesManager: StatesManager<T>,
private val handlers: List<StateHandlerHolder<out I, out O>>
) : StatesHandler<T, O> {
override suspend fun handleState(state: T): O? {
return statesQuotaManager.doOnQuota(state) {
launchStateHandling(state, handlers)
}
return launchStateHandling(state, handlers)
}
fun start(scope: CoroutineScope): Job = scope.launchSafelyWithoutExceptions {
val statesFlow = statesHolder.loadStates().asFlow() + statesHolder.onNewState
statesFlow.subscribeSafelyWithoutExceptions(this) {
val newState = handleState(it)
newState ?.also { statesHolder.saveState(newState) }
statesHolder.removeState(it)
val statePerformer: suspend (T) -> Unit = { state: T ->
val newState = handleState(state)
if (newState != null) {
statesManager.update(state, newState)
} else {
statesManager.endChain(state)
}
}
statesManager.onStartChain.subscribeSafelyWithoutExceptions(this) {
launch { statePerformer(it) }
}
statesManager.onChainStateUpdated.subscribeSafelyWithoutExceptions(this) {
launch { statePerformer(it.second) }
}
statesManager.getActiveStates().forEach {
launch { statePerformer(it) }
}
}
}

92
fsm/core/src/commonMain/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/StatesManager.kt Normal file
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@ -0,0 +1,92 @@
package dev.inmo.tgbotapi.libraries.fsm.core
import kotlinx.coroutines.flow.*
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
interface StatesManager<T : State> {
val onChainStateUpdated: Flow<Pair<T, T>>
val onStartChain: Flow<T>
val onEndChain: Flow<T>
/**
* Must set current set using [State.context]
*/
suspend fun update(old: T, new: T)
/**
* Starts chain with [state] as first [State]. May returns false in case of [State.context] of [state] is already
* busy by the other [State]
*/
suspend fun startChain(state: T)
/**
* Ends chain with context from [state]. In case when [State.context] of [state] is absent, [state] should be just
* ignored
*/
suspend fun endChain(state: T)
suspend fun getActiveStates(): List<T>
}
/**
* @param onContextsConflictResolver Receive old [State], new one and the state currently placed on new [State.context]
* key. In case when this callback will returns true, the state placed on [State.context] of new will be replaced by
* new state by using [endChain] with that state
*/
class InMemoryStatesManager<T : State>(
private val onContextsConflictResolver: suspend (old: T, new: T, currentNew: T) -> Boolean = { _, _, _ -> true }
) : StatesManager<T> {
private val _onChainStateUpdated = MutableSharedFlow<Pair<T, T>>(0)
override val onChainStateUpdated: Flow<Pair<T, T>> = _onChainStateUpdated.asSharedFlow()
private val _onStartChain = MutableSharedFlow<T>(0)
override val onStartChain: Flow<T> = _onStartChain.asSharedFlow()
private val _onEndChain = MutableSharedFlow<T>(0)
override val onEndChain: Flow<T> = _onEndChain.asSharedFlow()
private val contextsToStates = mutableMapOf<Any, T>()
private val mapMutex = Mutex()
override suspend fun update(old: T, new: T) = mapMutex.withLock {
when {
contextsToStates[old.context] != old -> return@withLock
old.context == new.context || !contextsToStates.containsKey(new.context) -> {
contextsToStates[old.context] = new
_onChainStateUpdated.emit(old to new)
}
else -> {
val stateOnNewOneContext = contextsToStates.getValue(new.context)
if (onContextsConflictResolver(old, new, stateOnNewOneContext)) {
endChainWithoutLock(stateOnNewOneContext)
contextsToStates.remove(old.context)
contextsToStates[new.context] = new
_onChainStateUpdated.emit(old to new)
}
}
}
}
override suspend fun startChain(state: T) = mapMutex.withLock {
if (!contextsToStates.containsKey(state.context)) {
contextsToStates[state.context] = state
_onStartChain.emit(state)
}
}
private suspend fun endChainWithoutLock(state: T) {
if (contextsToStates[state.context] == state) {
contextsToStates.remove(state.context)
_onEndChain.emit(state)
}
}
override suspend fun endChain(state: T) {
mapMutex.withLock {
endChainWithoutLock(state)
}
}
override suspend fun getActiveStates(): List<T> = contextsToStates.values.toList()
}

23
fsm/core/src/commonMain/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/StatesQuotaManager.kt
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@ -1,23 +0,0 @@
package dev.inmo.tgbotapi.libraries.fsm.core
import kotlinx.coroutines.sync.Mutex
interface StatesQuotaManager {
suspend fun <T : State, O : State> doOnQuota(state: T, block: suspend (T) -> O?): O?
suspend fun transitQuota(from: State, to: State?)
}
class InMemoryStatesQuotaManager : StatesQuotaManager {
private val currentContextsAndStates = mutableMapOf<Any, State>()
private val mutex = Mutex()
override suspend fun <T : State, O : State> doOnQuota(state: T, block: suspend (T) -> O?): O? {
}
override suspend fun transitQuota(state: State) {
TODO("Not yet implemented")
}
}

30
fsm/core/src/commonTest/kotlin/dev/inmo/tgbotapi/libraries/fsm/core/PlayableMain.kt
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@ -1,30 +0,0 @@
package dev.inmo.tgbotapi.libraries.fsm.core
import kotlin.random.Random
sealed interface TrafficLightState : ImmediateOrNeverState {
val trafficLightNumber: Int
override val context: Int
get() = trafficLightNumber
}
data class GreenCommon(override val trafficLightNumber: Int) : TrafficLightState
data class YellowCommon(override val trafficLightNumber: Int) : TrafficLightState
data class RedCommon(override val trafficLightNumber: Int) : TrafficLightState
suspend fun main() {
val countOfTrafficLights = 10
val initialStates = (0 until countOfTrafficLights).map {
when (Random.nextInt(3)) {
0 -> GreenCommon(it)
1 -> YellowCommon(it)
else -> RedCommon(it)
}
}
val statesHolder = ListBasedStatesHolder(initialStates)
val machine = StatesMachine(
statesHolder,
)
}

54
fsm/core/src/jvmTest/kotlin/PlayableMain.kt Normal file
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@ -0,0 +1,54 @@
import dev.inmo.tgbotapi.libraries.fsm.core.*
import kotlinx.coroutines.*
import kotlin.random.Random
import kotlin.test.Test
sealed interface TrafficLightState : ImmediateOrNeverState {
val trafficLightNumber: Int
override val context: Int
get() = trafficLightNumber
}
data class GreenCommon(override val trafficLightNumber: Int) : TrafficLightState
data class YellowCommon(override val trafficLightNumber: Int) : TrafficLightState
data class RedCommon(override val trafficLightNumber: Int) : TrafficLightState
class PlayableMain {
fun test() {
runBlocking {
val countOfTrafficLights = 10
val initialStates = (0 until countOfTrafficLights).map {
when (0/*Random.nextInt(3)*/) {
0 -> GreenCommon(it)
1 -> YellowCommon(it)
else -> RedCommon(it)
}
}
val statesManager = InMemoryStatesManager<TrafficLightState>()
val machine = StatesMachine(
statesManager,
listOf(
StateHandlerHolder(GreenCommon::class) {
delay(1000L)
YellowCommon(it.context).also(::println)
},
StateHandlerHolder(YellowCommon::class) {
delay(1000L)
RedCommon(it.context).also(::println)
},
StateHandlerHolder(RedCommon::class) {
delay(1000L)
GreenCommon(it.context).also(::println)
}
)
)
initialStates.forEach { statesManager.startChain(it) }
val scope = CoroutineScope(Dispatchers.Default)
machine.start(scope).join()
}
}
}