125 lines
3.8 KiB
Swift
125 lines
3.8 KiB
Swift
//
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// Copyright 2022-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
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// Please see LICENSE files in the repository root for full details.
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//
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import AVKit
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import Foundation
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enum CallScreenViewModelAction {
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case pictureInPictureIsAvailable(AVPictureInPictureController)
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case pictureInPictureStarted
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case pictureInPictureStopped
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case dismiss
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}
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struct CallScreenViewState: BindableState {
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let script: String?
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var url: URL?
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let certificateValidator: CertificateValidatorHookProtocol
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var bindings = Bindings()
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}
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struct Bindings {
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var javaScriptEvaluator: ((String) async throws -> Any)?
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var requestPictureInPictureHandler: (() async -> Result<Void, CallScreenError>)?
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var alertInfo: AlertInfo<UUID>?
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}
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enum CallScreenViewAction {
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case urlChanged(URL?)
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case pictureInPictureIsAvailable(AVPictureInPictureController)
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case navigateBack
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case pictureInPictureWillStop
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case endCall
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case mediaCapturePermissionGranted
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case outputDeviceSelected(deviceID: String)
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case widgetAction(message: String)
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}
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enum CallScreenError: Error {
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case pictureInPictureNotAvailable
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}
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/// Identifies each event handler used by the CallScreen webview
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///
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/// The names of the enum need to always match the name of the handlers on the webview.
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enum CallScreenJavaScriptMessageName: String, CaseIterable {
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/// Widget actions's handler.
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case widgetAction
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/// Used to show the native AVRoutePickerView.
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case showNativeOutputDevicePicker
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/// Used to determine if the webview has selected the earpiece or not.
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case onOutputDeviceSelect
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/// Used to handle the webview back button
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case onBackButtonPressed
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private var postMessageScript: String {
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switch self {
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case .widgetAction:
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"""
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window.addEventListener(
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"message",
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(event) => {
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let message = {data: event.data, origin: event.origin};
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if (message.data.response && message.data.api == "toWidget"
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|| !message.data.response && message.data.api == "fromWidget") {
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window.webkit.messageHandlers.\(rawValue).postMessage(JSON.stringify(message.data));
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} else {
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console.log("-- skipped event handling by the client because it is send from the client itself.");
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}
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},
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false,
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);
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"""
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case .showNativeOutputDevicePicker:
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"""
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window.controls.\(rawValue) = () => {
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window.webkit.messageHandlers.\(rawValue).postMessage("");
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};
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"""
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case .onOutputDeviceSelect:
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"""
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window.controls.\(rawValue) = (id) => {
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window.webkit.messageHandlers.\(rawValue).postMessage(id);
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};
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"""
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case .onBackButtonPressed:
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"""
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window.controls.\(rawValue) = () => {
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window.webkit.messageHandlers.\(rawValue).postMessage("");
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}
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"""
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}
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}
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static var allCasesInjectionScript: String {
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allCases.map(\.postMessageScript).joined(separator: "\n")
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}
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}
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struct DecodedWidgetMessage: Decodable {
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private static let decoder = JSONDecoder()
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private static let joinAction = "io.element.join"
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private static let fromWidget = "fromWidget"
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let action: String?
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let api: String?
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static func decode(message: String) throws -> DecodedWidgetMessage? {
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guard let data = message.data(using: .utf8) else {
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return nil
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}
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return try decoder.decode(DecodedWidgetMessage.self, from: data)
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}
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var hasJoined: Bool {
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action == Self.joinAction && api == Self.fromWidget
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}
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}
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