tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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HistoryStoreExample.kt (2313B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 // This is example code for the 'Simplified Example' section of
      6 // /docs/architecture-overview.md
      7 class HistoryStore(
      8    private val initialState: HistoryState,
      9    private val middleware: List<Middleware<HistoryState, HistoryAction>>
     10 ) : Store<HistoryState, Reducer<HistoryState, HistoryAction>>(initialState, middleware, ::reducer) {
     11    init {
     12        // This will ensure that middlewares can take any actions they need to during initialization
     13        dispatch(HistoryAction.Init)
     14    }
     15 }
     16 
     17 sealed class HistoryAction {
     18    object Init : HistoryAction()
     19    data class ItemsChanged(val items: List<History>) : HistoryAction()
     20    data class DeleteItems(val items: List<History>) : HistoryAction()
     21    data class DeleteFinished() : HistoryAction()
     22    data class ToggleItemSelection(val item: History) : HistoryAction()
     23    data class OpenItem(val item: History) : HistoryAction()
     24 }
     25 
     26 data class HistoryState(
     27    val items: List<History>,
     28    val selectedItems: List<History>,
     29    val itemsBeingDeleted: List<History>,
     30    companion object {
     31        val initial = HistoryState(
     32            items = listOf(),
     33            selectedItems = listOf(),
     34            itemsBeingDeleted = listOf(),
     35        )
     36    }
     37 ) {
     38    val displayItems = items.filter { item ->
     39        item !in itemsBeingDeleted
     40    }
     41 }
     42 
     43 fun reducer(oldState: HistoryState, action: HistoryAction): HistoryState = when (action) {
     44    is HistoryAction.ItemsChanged -> oldState.copy(items = action.items)
     45    is HistoryAction.DeleteItems -> oldState.copy(itemsBeingDeleted = action.items)
     46    is HistoryAction.DeleteFinished -> oldState.copy(
     47        items = oldState.items - oldState.itemsBeingDeleted,
     48        itemsBeingDeleted = listOf(),
     49    )
     50    is HistoryAction.ToggleItemSelection -> {
     51        if (oldState.selectedItems.contains(action.item)) {
     52            oldState.copy(selectedItems = oldState.selectedItems - action.item)
     53        } else {
     54            oldState.copy(selectedItems = oldState.selectedItems + action.item)
     55        }
     56    }
     57    else -> Unit
     58 }
     59 
     60 data class History(
     61    val id: Int,
     62    val title: String,
     63    val url: Uri,
     64 )