48 lines
1.5 KiB
Kotlin
48 lines
1.5 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 ContactsStore(
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private val initialState: ContactsState
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) : Store<ContactsState, Reducer<ContactState, ContactsAction>>(initialState, ::reducer)
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sealed class ContactsAction {
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data class ContactRenamed(val contactId: Int, val newName: String) : ContactsAction
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data class ThemeChanged(val newTheme: Theme) : ContactsAction
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}
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data class ContactsState(
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val contacts: List<Contact>,
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val theme: Theme
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)
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data class Contact(
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val name: String,
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val id: Int,
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val imageUrl: Uri
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)
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enum class Theme {
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ORANGE, DARK
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}
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fun reducer(oldState: ContactsState, action: ContactsAction): ContactsState = when (action) {
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is ContactsAction.ThemeChanged -> oldState.copy(theme = action.newTheme)
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is ContactsAction.ContactRenamed -> {
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val newContacts = oldState.contacts.map { contact ->
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// If this is the contact we want to change...
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if (contact.id == action.contactId) {
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// Update its name, but keep other values the same
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contact.copy(name = newName)
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} else {
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// Otherwise return the original contact
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return@map contact
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}
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}
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return oldState.copy(contacts = newContacts)
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}
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}
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