73 lines
3.1 KiB
Swift
73 lines
3.1 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import GRDB
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import DifferenceKit
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import SessionUIKit
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import SessionMessagingKit
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import SessionUtilitiesKit
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class NotificationContentViewModel: SettingsTableViewModel<NotificationSettingsViewModel.Section, Preferences.NotificationPreviewType> {
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// MARK: - Section
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public enum Section: SettingSection {
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case content
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var title: String { return "" } // No title
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}
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// MARK: - Content
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override var title: String { "NOTIFICATIONS_STYLE_CONTENT_TITLE".localized() }
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private var _settingsData: [SectionModel] = []
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public override var settingsData: [SectionModel] { _settingsData }
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public override var observableSettingsData: ObservableData { _observableSettingsData }
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/// This is all the data the screen needs to populate itself, please see the following link for tips to help optimise
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/// performance https://github.com/groue/GRDB.swift#valueobservation-performance
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///
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/// **Note:** This observation will be triggered twice immediately (and be de-duped by the `removeDuplicates`)
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/// this is due to the behaviour of `ValueConcurrentObserver.asyncStartObservation` which triggers it's own
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/// fetch (after the ones in `ValueConcurrentObserver.asyncStart`/`ValueConcurrentObserver.syncStart`)
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/// just in case the database has changed between the two reads - unfortunately it doesn't look like there is a way to prevent this
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private lazy var _observableSettingsData: ObservableData = ValueObservation
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.trackingConstantRegion { [weak self] db -> [SectionModel] in
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let currentSelection: Preferences.NotificationPreviewType? = db[.preferencesNotificationPreviewType]
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.defaulting(to: .defaultPreviewType)
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return [
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SectionModel(
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model: .content,
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elements: Preferences.NotificationPreviewType.allCases
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.map { previewType in
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SettingInfo(
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id: previewType,
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title: previewType.name,
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action: .listSelection(
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isSelected: { (currentSelection == previewType) },
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storedSelection: (currentSelection == previewType),
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shouldAutoSave: true,
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selectValue: {
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Storage.shared.write { db in
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db[.preferencesNotificationPreviewType] = previewType
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}
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}
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)
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)
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}
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)
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]
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}
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.removeDuplicates()
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// MARK: - Functions
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public override func updateSettings(_ updatedSettings: [SectionModel]) {
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self._settingsData = updatedSettings
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}
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public override func saveChanges() {}
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}
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