108 lines
4.0 KiB
Swift
108 lines
4.0 KiB
Swift
/*
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Copyright 2019 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import Foundation
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/// A structure used to handle the application version
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@objcMembers
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final class AppVersion: NSObject {
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// MARK: - Constants
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private enum Constants {
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static let lastBundleShortVersion: String = "lastBundleShortVersion"
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static let lastBundleVersion: String = "lastBundleVersion"
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static let shortVersionComponentsSeparator: Character = "."
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}
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// Current app version from Info.plist
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static var current: AppVersion? {
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guard let bundleShortVersion = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String,
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let bundleVersion = Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as? String else {
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return nil
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}
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return AppVersion(bundleShortVersion: bundleShortVersion, bundleVersion: bundleVersion)
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}
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// Last app version used by user
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static var lastUsed: AppVersion? {
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guard let bundleShortVersion = UserDefaults.standard.string(forKey: Constants.lastBundleShortVersion),
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let bundleVersion = UserDefaults.standard.string(forKey: Constants.lastBundleVersion) else {
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return nil
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}
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return AppVersion(bundleShortVersion: bundleShortVersion, bundleVersion: bundleVersion)
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}
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// MARK: - Properties
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let bundleShortVersion: String
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let bundleVersion: String
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// MARK: - Setup
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init(bundleShortVersion: String, bundleVersion: String) {
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self.bundleShortVersion = bundleShortVersion
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self.bundleVersion = bundleVersion
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super.init()
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}
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// MARK: - Public
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func compare(_ appVersion: AppVersion) -> ComparisonResult {
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let appVersionComparisonResult: ComparisonResult
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let bundleShortVersionComparisonResult = AppVersion.compare(stringVersion: self.bundleShortVersion, with: appVersion.bundleShortVersion)
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// If short versions are equal compare build version
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if bundleShortVersionComparisonResult == ComparisonResult.orderedSame {
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appVersionComparisonResult = AppVersion.compare(stringVersion: self.bundleVersion, with: appVersion.bundleVersion)
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} else {
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appVersionComparisonResult = bundleShortVersionComparisonResult
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}
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return appVersionComparisonResult
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}
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/// Return true if the last stored version is lower than the provided one.
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/// Retrun true by default when there is no stored version.
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static func isLastUsedVersionLowerThan(_ appVersion: AppVersion) -> Bool {
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guard let lastAppVersion = AppVersion.lastUsed else {
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return true
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}
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return lastAppVersion.compare(appVersion) == .orderedAscending
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}
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/// Store the current application version.
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static func updateLastUsedVersion() {
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guard let currentVersion = AppVersion.current else {
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return
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}
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UserDefaults.standard.set(currentVersion.bundleShortVersion, forKey: Constants.lastBundleShortVersion)
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UserDefaults.standard.set(currentVersion.bundleVersion, forKey: Constants.lastBundleVersion)
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}
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override var description: String {
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return "\(bundleShortVersion)(\(bundleVersion))"
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}
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// MARK: - Private
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private static func compare(stringVersion: String, with otherStringVersion: String) -> ComparisonResult {
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return stringVersion.compare(otherStringVersion, options: NSString.CompareOptions.numeric, range: nil, locale: nil)
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}
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}
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