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Expose sliding sync proxy URL on the server selection screen; make ap…
…p more resilient to slidinc sync configuration errors, remove fatal errors
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69
ElementX/Sources/Other/UserDefaultsBackedPropertyWrapper.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| // | ||
| // Copyright 2021 New Vector Ltd | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
|
|
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| // Taken from https://www.swiftbysundell.com/articles/property-wrappers-in-swift/ | ||
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| import Foundation | ||
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| @propertyWrapper | ||
| struct UserDefault<Value> { | ||
| private let key: String | ||
| private let defaultValue: Value | ||
| private let storage: UserDefaults | ||
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| init(key: String, defaultValue: Value, storage: UserDefaults = .standard) { | ||
| self.defaultValue = defaultValue | ||
| self.key = key | ||
| self.storage = storage | ||
| } | ||
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| var wrappedValue: Value { | ||
| get { | ||
| let value = storage.value(forKey: key) as? Value | ||
| return value ?? defaultValue | ||
| } | ||
| set { | ||
| if let optional = newValue as? AnyOptional, optional.isNil { | ||
| storage.removeObject(forKey: key) | ||
| } else { | ||
| storage.setValue(newValue, forKey: key) | ||
| } | ||
| let tmpKey = key | ||
| DispatchQueue.main.async { | ||
| NotificationCenter.default.post(name: .userDefaultValueUpdated, | ||
| object: tmpKey) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| extension UserDefault where Value: ExpressibleByNilLiteral { | ||
| init(key: String, storage: UserDefaults = .standard) { | ||
| self.init(key: key, defaultValue: nil, storage: storage) | ||
| } | ||
| } | ||
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| private protocol AnyOptional { | ||
| var isNil: Bool { get } | ||
| } | ||
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| extension Optional: AnyOptional { | ||
| var isNil: Bool { self == nil } | ||
| } | ||
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| extension Notification.Name { | ||
| static let userDefaultValueUpdated = Notification.Name("userDefaultValueUpdated") | ||
| } |
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