/
StoryDataStepBase.kt
78 lines (67 loc) · 2.2 KB
/
StoryDataStepBase.kt
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/*
* Copyright (C) 2017/2021 e-voyageurs technologies
*
* 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 ai.tock.bot.definition
import ai.tock.bot.definition.StoryHandlerBase.Companion.isEndCalled
/**
* Base class for [StoryDataStep] implementations.
*
* @param T the [StoryDef]
* @param TD the StoryDef data
* @param D the step data
*/
abstract class StoryDataStepBase<T : StoryHandlerDefinition, TD, D>(
private val select: TD.(T) -> Boolean = { false },
private val setup: T.(TD) -> D = {
@Suppress("UNCHECKED_CAST")
EmptyData as D
},
private val reply: T.(D) -> Any?
) : StoryDataStep<T, TD, D> {
fun select(): TD.(T) -> Boolean = select
fun setup(): T.(TD) -> D = setup
fun reply(): T.(D) -> Any? = reply
fun execute(storyDef: T, configuration: TD): Any? {
storyDef.step = this
val d = setup()(storyDef, configuration)
return reply()(storyDef, d)
}
final override fun selectFromBusAndData(): T.(TD?) -> Boolean = {
if (it == null) {
error("story data has to be not null")
}
select()(it, this)
}
final override fun checkPreconditions(): T.(TD?) -> D? = {
if (it == null) {
error("story data has to be not null")
}
setup()(this, it)
}
final override fun handler(): T.(D?) -> Any? = {
val c = this
if (it == null) {
error("data step has to be not null")
}
val reply = reply()(c, it)
// in order to manage switch inside the reply
if (!isEndCalled(c)) {
end {
reply
}
}
}
override val name: String get() = this::class.simpleName!!
}