69 lines
1.8 KiB
Swift
69 lines
1.8 KiB
Swift
// Author: fruit.com.cn
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import CoreTelephony
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import Flutter
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import Foundation
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/// 监听系统无线数据选择，并用 URLSession 唤起系统选择框。
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final class WirelessDataPrompt {
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static let channelName = "com.stormg.lumadrama/wireless-data"
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static let awaitDecisionMethod = "awaitDecision"
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/// 系统选择框由 URLSession 触发，Dart 的 Socket 请求不会弹出。
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private static let promptURL = URL(string: "https://captive.apple.com/hotspot-detect.html")
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private let cellularData = CTCellularData()
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private let lock = NSLock()
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private var pending: [FlutterResult] = []
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private var decided = false
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private var didRequestPrompt = false
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init() {
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cellularData.cellularDataRestrictionDidUpdateNotifier = { [weak self] state in
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DispatchQueue.main.async {
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self?.completeIfDecided(state)
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}
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}
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}
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/// 应用进入前台后请求一次，促使系统弹出无线数据选择。
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func requestSystemPrompt() {
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guard !didRequestPrompt, let promptURL = Self.promptURL else {
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return
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}
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didRequestPrompt = true
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_ = cellularData.restrictedState
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URLSession.shared.dataTask(with: promptURL) { _, _, _ in }.resume()
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}
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/// 未允许前先挂起；用户允许无线数据后再放行。
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func awaitDecision(_ result: @escaping FlutterResult) {
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lock.lock()
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if decided {
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lock.unlock()
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DispatchQueue.main.async {
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result(nil)
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}
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return
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}
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pending.append(result)
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lock.unlock()
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}
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private func completeIfDecided(_ state: CTCellularDataRestrictedState) {
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if state != .notRestricted {
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return
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}
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lock.lock()
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if decided {
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lock.unlock()
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return
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}
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decided = true
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let waiters = pending
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pending.removeAll()
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lock.unlock()
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waiters.forEach { $0(nil) }
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}
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}
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