65 lines
2.3 KiB
Kotlin
65 lines
2.3 KiB
Kotlin
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// This is example code for the 'Simplified Example' section of
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// /docs/architecture-overview.md
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class HistoryStore(
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private val initialState: HistoryState,
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private val middleware: List<Middleware<HistoryState, HistoryAction>>
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) : Store<HistoryState, Reducer<HistoryState, HistoryAction>>(initialState, middleware, ::reducer) {
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init {
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// This will ensure that middlewares can take any actions they need to during initialization
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dispatch(HistoryAction.Init)
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}
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}
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sealed class HistoryAction {
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object Init : HistoryAction()
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data class ItemsChanged(val items: List<History>) : HistoryAction()
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data class DeleteItems(val items: List<History>) : HistoryAction()
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data class DeleteFinished() : HistoryAction()
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data class ToggleItemSelection(val item: History) : HistoryAction()
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data class OpenItem(val item: History) : HistoryAction()
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}
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data class HistoryState(
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val items: List<History>,
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val selectedItems: List<History>,
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val itemsBeingDeleted: List<History>,
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companion object {
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val initial = HistoryState(
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items = listOf(),
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selectedItems = listOf(),
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itemsBeingDeleted = listOf(),
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)
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}
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) {
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val displayItems = items.filter { item ->
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item !in itemsBeingDeleted
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}
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}
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fun reducer(oldState: HistoryState, action: HistoryAction): HistoryState = when (action) {
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is HistoryAction.ItemsChanged -> oldState.copy(items = action.items)
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is HistoryAction.DeleteItems -> oldState.copy(itemsBeingDeleted = action.items)
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is HistoryAction.DeleteFinished -> oldState.copy(
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items = oldState.items - oldState.itemsBeingDeleted,
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itemsBeingDeleted = listOf(),
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)
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is HistoryAction.ToggleItemSelection -> {
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if (oldState.selectedItems.contains(action.item)) {
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oldState.copy(selectedItems = oldState.selectedItems - action.item)
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} else {
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oldState.copy(selectedItems = oldState.selectedItems + action.item)
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}
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}
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else -> Unit
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}
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data class History(
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val id: Int,
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val title: String,
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val url: Uri,
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)
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