Files
firebase-ios-sdk/FirebaseMLModelDownloader/Sources/LocalModelInfo.swift
T
manjanac 9597ffe51b Removes saved path on device (#7439)
* Restores ML Pods after M77.

* Fix Package.swift

* Re-add catalyst to GHA workflow.

* Add tests for list models.

* Failable emptying of model directory in tests.

* Remove path from local model info and user defaults.

* Clean up user defaults on delete + add interpreter to test app.

* Replace .absoluteString with .path. This makes model.path work directly with TFLite interpreter.

* Fix paths in tests.

* Unit test for successful get model.

* Rename modelPath to modelURL.

* Use defaults.integer instead of casting to Int.

* Remove force casting.

* Mostly minor fixes that came out of the bugbash (#7462)

* Use appropriate errors for network offline and api disabled.

* Error + test for resourceExhausted.

* Surface backend error message in logs whenever available.

* Add disclaimer to empty directories for testing only.

* Add Firelog events for model info retrieval.

* Add documentation + other minor fixes. (#7465)

* Add docs + clean up ModelDownloader.swift.

* Add docs + clean up ModelDownloadTask.swift.

* Add docs + clean up FileDownloader.swift.

* Add docs + clean up LocalModelInfo.swift. Handle TODO for userdefaults init failure.

* Add docs + clean up RemoteModelInfo.swift, DownloaderUserDefaults.swift.

* Add docs + clean up ModelInfoRetriever.swift.

* Add docs + clean up ModelDownloadConditions.swift.

* Add docs + clean up DeviceLogger.swift.

* Add docs + clean up TelemetryLogger.swift.

* Add docs + clean up ModelFileManager.swift.

* Remove resolved TODOs + other minor fixes.

* Update model download conditions init.

* Fix comment formatting.

* Minor newline formatting.

* Minor comment formatting.

* Add docs for ModelDownloadConditions.

* Basic fix for user defaults race condition.

* Minor updates to tests.

* Minor updates to tests.

* Final fixes (#7471)

* Refactor error parsing in model info response.

* Add Firelog for delete event + minor fixes.

* Temporary - test to check telemetry for delete event.

* Disable backup of model files; handle inability to locate model storage dir.

* Minor fixes.

* Add tflite path extension to model file.
2021-02-10 09:47:07 -08:00

86 lines
3.1 KiB
Swift

// Copyright 2021 Google LLC
//
// 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.
import Foundation
/// Model info object with details about downloaded and locally available model.
class LocalModelInfo {
/// Model name.
let name: String
/// Hash of the model, as returned by server.
let modelHash: String
/// Size of the model, as returned by server.
let size: Int
init(name: String, modelHash: String, size: Int) {
self.name = name
self.modelHash = modelHash
self.size = size
}
/// Convenience init to create local model info from remotely downloaded model info.
convenience init(from remoteModelInfo: RemoteModelInfo) {
self.init(
name: remoteModelInfo.name,
modelHash: remoteModelInfo.modelHash,
size: remoteModelInfo.size
)
}
/// Convenience init to create local model info from stored info in user defaults.
convenience init?(fromDefaults defaults: UserDefaults, name: String, appName: String) {
let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
guard let modelHash = defaults.string(forKey: "\(defaultsPrefix).model-hash") else {
return nil
}
let size = defaults.integer(forKey: "\(defaultsPrefix).model-size")
self.init(name: name, modelHash: modelHash, size: size)
}
}
/// Extension to write local model info to user defaults.
extension LocalModelInfo: DownloaderUserDefaultsWriteable {
// Get user defaults key prefix.
private static func getUserDefaultsKeyPrefix(appName: String, modelName: String) -> String {
let bundleID = Bundle.main.bundleIdentifier ?? ""
return "\(bundleID).\(appName).\(modelName)"
}
/// Write local model info to user defaults.
func writeToDefaults(_ defaults: UserDefaults, appName: String) {
let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
defaults.setValue(modelHash, forKey: "\(defaultsPrefix).model-hash")
defaults.setValue(size, forKey: "\(defaultsPrefix).model-size")
}
func removeFromDefaults(_ defaults: UserDefaults, appName: String) {
let defaultsPrefix = LocalModelInfo.getUserDefaultsKeyPrefix(appName: appName, modelName: name)
defaults.removeObject(forKey: "\(defaultsPrefix).model-hash")
defaults.removeObject(forKey: "\(defaultsPrefix).model-size")
}
}
/// Named user defaults for FirebaseML.
extension UserDefaults {
static var firebaseMLDefaults: UserDefaults {
let suiteName = "com.google.firebase.ml"
guard let defaults = UserDefaults(suiteName: suiteName) else {
return UserDefaults.standard
}
return defaults
}
}