mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
87 lines
3.1 KiB
Swift
87 lines
3.1 KiB
Swift
// Copyright 2021 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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import Foundation
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#if SWIFT_PACKAGE
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internal import GoogleUtilities_UserDefaults
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#else
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internal import GoogleUtilities
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#endif // SWIFT_PACKAGE
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/// Model info object with details about downloaded and locally available model.
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class LocalModelInfo {
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/// Model name.
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let name: String
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/// Hash of the model, as returned by server.
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let modelHash: String
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/// Size of the model, as returned by server.
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let size: Int
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init(name: String, modelHash: String, size: Int) {
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self.name = name
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self.modelHash = modelHash
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self.size = size
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}
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/// Convenience init to create local model info from remotely downloaded model info.
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convenience init(from remoteModelInfo: RemoteModelInfo) {
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self.init(
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name: remoteModelInfo.name,
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modelHash: remoteModelInfo.modelHash,
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size: remoteModelInfo.size
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)
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}
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/// Convenience init to create local model info from stored info in user defaults.
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convenience init?(fromDefaults defaults: GULUserDefaults, name: String, appName: String) {
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let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
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guard let modelHash = defaults.string(forKey: "\(defaultsPrefix).model-hash") else {
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return nil
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}
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let size = defaults.integer(forKey: "\(defaultsPrefix).model-size")
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self.init(name: name, modelHash: modelHash, size: size)
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}
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}
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/// Extension to write local model info to user defaults.
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extension LocalModelInfo: DownloaderUserDefaultsWriteable {
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// Get user defaults key prefix.
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private static func getUserDefaultsKeyPrefix(appName: String, modelName: String) -> String {
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let bundleID = Bundle.main.bundleIdentifier ?? ""
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return "\(bundleID).\(appName).\(modelName)"
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}
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/// Write local model info to user defaults.
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func writeToDefaults(_ defaults: GULUserDefaults, appName: String) {
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let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
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defaults.setObject(modelHash, forKey: "\(defaultsPrefix).model-hash")
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defaults.setObject(size, forKey: "\(defaultsPrefix).model-size")
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}
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func removeFromDefaults(_ defaults: GULUserDefaults, appName: String) {
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let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
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defaults.removeObject(forKey: "\(defaultsPrefix).model-hash")
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defaults.removeObject(forKey: "\(defaultsPrefix).model-size")
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}
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}
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/// Named user defaults for FirebaseML.
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extension GULUserDefaults {
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static var firebaseMLDefaults: GULUserDefaults {
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return GULUserDefaults(suiteName: "com.google.firebase.ml")
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}
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}
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