1ba45411ae
The successor to 389515b0fa.
This enables the "WebRTC-Network-UseNWPathMonitor" RingRTC field trial
for all users.
The hard part: adding a remote config kill switch. I added a bunch of
comments (and tests) to try to make the intention clear.
41 lines
1.5 KiB
Swift
41 lines
1.5 KiB
Swift
//
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// Copyright 2023 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import Foundation
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/// Utilities for saving and loading RingRTC field trials from ``UserDefaults``.
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///
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/// We want to run various WebRTC "field trials", which we set up via RingRTC's ``CallManager``.
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/// We want to gate these field trials on remote config values. Unfortunately, the iOS app
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/// initializes ``CallManager`` early during app startup, before the remote config values are ready.
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/// To work around this without a larger refactor, we cache these remote config values in
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/// ``UserDefaults``.
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public enum RingrtcFieldTrials {
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private static var disableNwPathMonitorTrialKey: String { "ringrtcDisableNwPathMonitorFieldTrial" }
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public static func trials(with userDefaults: UserDefaults) -> [String: String] {
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var result = [String: String]()
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if isNwPathMonitorTrialEnabled(with: userDefaults) {
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result["WebRTC-Network-UseNWPathMonitor"] = "Enabled"
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}
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return result
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}
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private static func isNwPathMonitorTrialEnabled(with userDefaults: UserDefaults) -> Bool {
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!userDefaults.bool(forKey: disableNwPathMonitorTrialKey)
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}
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static func saveNwPathMonitorTrialState(isEnabled: Bool, in userDefaults: UserDefaults) {
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Logger.info("Saving RingRTC nwPathMonitor field trial state as \(isEnabled)")
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if isEnabled {
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userDefaults.removeObject(forKey: disableNwPathMonitorTrialKey)
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} else {
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userDefaults.set(true, forKey: disableNwPathMonitorTrialKey)
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}
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}
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}
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