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