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UserDefaults+Extensions.swift
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UserDefaults+Extensions.swift
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import Foundation
enum WFDefaults {
static let isLoggedIn = "isLoggedIn"
static let showAllPostsFlag = "showAllPostsFlag"
static let selectedCollectionURL = "selectedCollectionURL"
static let lastDraftURL = "lastDraftURL"
#if os(macOS)
static let automaticallyChecksForUpdates = "automaticallyChecksForUpdates"
static let subscribeToBetaUpdates = "subscribeToBetaUpdates"
#endif
}
extension UserDefaults {
private enum DefaultsError: Error {
case couldNotMigrateStandardDefaults
var description: String {
switch self {
case .couldNotMigrateStandardDefaults:
return "Could not migrate user defaults to group container."
}
}
}
private static let appGroupName: String = "group.com.abunchtell.writefreely"
private static let didMigrateDefaultsToAppGroup: String = "didMigrateDefaultsToAppGroup"
private static let didRemoveStandardDefaults: String = "didRemoveStandardDefaults"
static var shared: UserDefaults {
if let groupDefaults = UserDefaults(suiteName: UserDefaults.appGroupName),
groupDefaults.bool(forKey: UserDefaults.didMigrateDefaultsToAppGroup) {
return groupDefaults
} else {
do {
let groupDefaults = try UserDefaults.standard.migrateDefaultsToAppGroup()
return groupDefaults
} catch {
return UserDefaults.standard
}
}
}
private func migrateDefaultsToAppGroup() throws -> UserDefaults {
let userDefaults = UserDefaults.standard
let groupDefaults = UserDefaults(suiteName: UserDefaults.appGroupName)
if let groupDefaults = groupDefaults {
if groupDefaults.bool(forKey: UserDefaults.didMigrateDefaultsToAppGroup) {
return groupDefaults
}
for (key, value) in userDefaults.dictionaryRepresentation() {
groupDefaults.set(value, forKey: key)
}
groupDefaults.set(true, forKey: UserDefaults.didMigrateDefaultsToAppGroup)
return groupDefaults
} else {
throw DefaultsError.couldNotMigrateStandardDefaults
}
}
}

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