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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| MARKETING_VERSION = 7.141.1 | ||
| MARKETING_VERSION = 7.142.0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,291 @@ | ||
| // | ||
| // PersistentPixel.swift | ||
| // DuckDuckGo | ||
| // | ||
| // Copyright © 2024 DuckDuckGo. All rights reserved. | ||
| // | ||
| // 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 | ||
| import os.log | ||
| import Networking | ||
| import Persistence | ||
|
|
||
| public protocol PersistentPixelFiring { | ||
| func fire(pixel: Pixel.Event, | ||
| error: Swift.Error?, | ||
| includedParameters: [Pixel.QueryParameters], | ||
| withAdditionalParameters params: [String: String], | ||
| onComplete: @escaping (Error?) -> Void) | ||
|
|
||
| func fireDailyAndCount(pixel: Pixel.Event, | ||
| pixelNameSuffixes: (dailySuffix: String, countSuffix: String), | ||
| error: Swift.Error?, | ||
| withAdditionalParameters params: [String: String], | ||
| includedParameters: [Pixel.QueryParameters], | ||
| completion: @escaping ((dailyPixelStorageError: Error?, countPixelStorageError: Error?)) -> Void) | ||
|
|
||
| func sendQueuedPixels(completion: @escaping (PersistentPixelStorageError?) -> Void) | ||
| } | ||
|
|
||
| public final class PersistentPixel: PersistentPixelFiring { | ||
|
|
||
| enum Constants { | ||
| static let lastProcessingDateKey = "com.duckduckgo.ios.persistent-pixel.last-processing-timestamp" | ||
|
|
||
| #if DEBUG | ||
| static let minimumProcessingInterval: TimeInterval = .minutes(1) | ||
| #else | ||
| static let minimumProcessingInterval: TimeInterval = .hours(1) | ||
| #endif | ||
| } | ||
|
|
||
| private let pixelFiring: PixelFiring.Type | ||
| private let dailyPixelFiring: DailyPixelFiring.Type | ||
| private let persistentPixelStorage: PersistentPixelStoring | ||
| private let lastProcessingDateStorage: KeyValueStoring | ||
| private let calendar: Calendar | ||
| private let dateGenerator: () -> Date | ||
| private let workQueue = DispatchQueue(label: "Persistent Pixel Retry Queue") | ||
|
|
||
| private let dateFormatter: ISO8601DateFormatter = { | ||
| let formatter = ISO8601DateFormatter() | ||
| formatter.formatOptions = [.withInternetDateTime] | ||
| return formatter | ||
| }() | ||
|
|
||
| public convenience init() { | ||
| self.init(pixelFiring: Pixel.self, | ||
| dailyPixelFiring: DailyPixel.self, | ||
| persistentPixelStorage: DefaultPersistentPixelStorage(), | ||
| lastProcessingDateStorage: UserDefaults.standard) | ||
| } | ||
|
|
||
| init(pixelFiring: PixelFiring.Type, | ||
| dailyPixelFiring: DailyPixelFiring.Type, | ||
| persistentPixelStorage: PersistentPixelStoring, | ||
| lastProcessingDateStorage: KeyValueStoring, | ||
| calendar: Calendar = .current, | ||
| dateGenerator: @escaping () -> Date = { Date() }) { | ||
| self.pixelFiring = pixelFiring | ||
| self.dailyPixelFiring = dailyPixelFiring | ||
| self.persistentPixelStorage = persistentPixelStorage | ||
| self.lastProcessingDateStorage = lastProcessingDateStorage | ||
| self.calendar = calendar | ||
| self.dateGenerator = dateGenerator | ||
| } | ||
|
|
||
| // MARK: - Pixel Firing | ||
|
|
||
| public func fire(pixel: Pixel.Event, | ||
| error: Swift.Error? = nil, | ||
| includedParameters: [Pixel.QueryParameters] = [.appVersion], | ||
| withAdditionalParameters additionalParameters: [String: String] = [:], | ||
| onComplete: @escaping (Error?) -> Void = { _ in }) { | ||
| let fireDate = dateGenerator() | ||
| let dateString = dateFormatter.string(from: fireDate) | ||
| var additionalParameters = additionalParameters | ||
| additionalParameters[PixelParameters.originalPixelTimestamp] = dateString | ||
|
|
||
| Logger.general.debug("Firing persistent pixel named \(pixel.name)") | ||
|
|
||
| pixelFiring.fire(pixel: pixel, | ||
| error: error, | ||
| includedParameters: includedParameters, | ||
| withAdditionalParameters: additionalParameters) { pixelFireError in | ||
| if pixelFireError != nil { | ||
| do { | ||
| if let error { | ||
| additionalParameters.appendErrorPixelParams(error: error) | ||
| } | ||
|
|
||
| try self.persistentPixelStorage.append(pixels: [ | ||
| PersistentPixelMetadata(eventName: pixel.name, | ||
| additionalParameters: additionalParameters, | ||
| includedParameters: includedParameters) | ||
| ]) | ||
|
|
||
| onComplete(nil) | ||
| } catch { | ||
| onComplete(error) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public func fireDailyAndCount(pixel: Pixel.Event, | ||
| pixelNameSuffixes: (dailySuffix: String, countSuffix: String) = DailyPixel.Constant.dailyPixelSuffixes, | ||
| error: Swift.Error? = nil, | ||
| withAdditionalParameters additionalParameters: [String: String], | ||
| includedParameters: [Pixel.QueryParameters] = [.appVersion], | ||
| completion: @escaping ((dailyPixelStorageError: Error?, countPixelStorageError: Error?)) -> Void = { _ in }) { | ||
| let dispatchGroup = DispatchGroup() | ||
|
|
||
| dispatchGroup.enter() // onDailyComplete | ||
| dispatchGroup.enter() // onCountComplete | ||
|
|
||
| var dailyPixelStorageError: Error? | ||
| var countPixelStorageError: Error? | ||
|
|
||
| let fireDate = dateGenerator() | ||
| let dateString = dateFormatter.string(from: fireDate) | ||
| var additionalParameters = additionalParameters | ||
| additionalParameters[PixelParameters.originalPixelTimestamp] = dateString | ||
|
|
||
| Logger.general.debug("Firing persistent daily/count pixel named \(pixel.name)") | ||
|
|
||
| dailyPixelFiring.fireDailyAndCount( | ||
| pixel: pixel, | ||
| pixelNameSuffixes: pixelNameSuffixes, | ||
| error: error, | ||
| withAdditionalParameters: additionalParameters, | ||
| includedParameters: includedParameters, | ||
| pixelFiring: Pixel.self, | ||
| dailyPixelStore: DailyPixel.storage, | ||
| onDailyComplete: { dailyError in | ||
| if let dailyError, (dailyError as? DailyPixel.Error) != .alreadyFired { | ||
| do { | ||
| if let error { additionalParameters.appendErrorPixelParams(error: error) } | ||
| Logger.general.debug("Saving persistent daily pixel named \(pixel.name)") | ||
| try self.persistentPixelStorage.append(pixels: [ | ||
| PersistentPixelMetadata(eventName: pixel.name + pixelNameSuffixes.dailySuffix, | ||
| additionalParameters: additionalParameters, | ||
| includedParameters: includedParameters) | ||
| ]) | ||
| } catch { | ||
| dailyPixelStorageError = error | ||
| } | ||
| } | ||
|
|
||
| dispatchGroup.leave() | ||
| }, onCountComplete: { countError in | ||
| if countError != nil { | ||
| do { | ||
| if let error { additionalParameters.appendErrorPixelParams(error: error) } | ||
| Logger.general.debug("Saving persistent count pixel named \(pixel.name)") | ||
| try self.persistentPixelStorage.append(pixels: [ | ||
| PersistentPixelMetadata(eventName: pixel.name + pixelNameSuffixes.countSuffix, | ||
| additionalParameters: additionalParameters, | ||
| includedParameters: includedParameters) | ||
| ]) | ||
| } catch { | ||
| countPixelStorageError = error | ||
| } | ||
| } | ||
|
|
||
| dispatchGroup.leave() | ||
| } | ||
| ) | ||
|
|
||
| dispatchGroup.notify(queue: .global()) { | ||
| completion((dailyPixelStorageError: dailyPixelStorageError, countPixelStorageError: countPixelStorageError)) | ||
| } | ||
| } | ||
|
|
||
| // MARK: - Queue Processing | ||
|
|
||
| public func sendQueuedPixels(completion: @escaping (PersistentPixelStorageError?) -> Void) { | ||
| workQueue.async { | ||
| if let lastProcessingDate = self.lastProcessingDateStorage.object(forKey: Constants.lastProcessingDateKey) as? Date { | ||
| let threshold = self.dateGenerator().addingTimeInterval(-Constants.minimumProcessingInterval) | ||
| if threshold <= lastProcessingDate { | ||
| completion(nil) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| self.lastProcessingDateStorage.set(self.dateGenerator(), forKey: Constants.lastProcessingDateKey) | ||
|
|
||
| do { | ||
| let queuedPixels = try self.persistentPixelStorage.storedPixels() | ||
|
|
||
| if queuedPixels.isEmpty { | ||
| completion(nil) | ||
| return | ||
| } | ||
|
|
||
| Logger.general.debug("Persistent pixel retrying \(queuedPixels.count, privacy: .public) pixels") | ||
|
|
||
| self.fire(queuedPixels: queuedPixels) { pixelIDsToRemove in | ||
| Logger.general.debug("Persistent pixel retrying done, \(pixelIDsToRemove.count, privacy: .public) pixels successfully sent") | ||
|
|
||
| do { | ||
| try self.persistentPixelStorage.remove(pixelsWithIDs: pixelIDsToRemove) | ||
| completion(nil) | ||
| } catch { | ||
| completion(PersistentPixelStorageError.writeError(error)) | ||
| } | ||
| } | ||
| } catch { | ||
| completion(PersistentPixelStorageError.readError(error)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // MARK: - Private | ||
|
|
||
| /// Sends queued pixels and calls the completion handler with those that should be removed. | ||
| private func fire(queuedPixels: [PersistentPixelMetadata], completion: @escaping (Set<UUID>) -> Void) { | ||
| let dispatchGroup = DispatchGroup() | ||
|
|
||
| let pixelIDsAccessQueue = DispatchQueue(label: "Failed Pixel Retry Attempt Metadata Queue") | ||
| var pixelIDsToRemove: Set<UUID> = [] | ||
| let currentDate = dateGenerator() | ||
| let date28DaysAgo = calendar.date(byAdding: .day, value: -28, to: currentDate) | ||
|
|
||
| for pixelMetadata in queuedPixels { | ||
| if let sendDateString = pixelMetadata.timestamp, let sendDate = dateFormatter.date(from: sendDateString), let date28DaysAgo { | ||
| if sendDate < date28DaysAgo { | ||
| pixelIDsAccessQueue.sync { | ||
| _ = pixelIDsToRemove.insert(pixelMetadata.id) | ||
| } | ||
| continue | ||
| } | ||
| } else { | ||
| // If we don't have a timestamp for some reason, ignore the retry - retries are only useful if they have a timestamp attached. | ||
| // It's not expected that this will ever happen, so an assertion failure is used to report it when debugging. | ||
| assertionFailure("Did not find a timestamp for pixel \(pixelMetadata.eventName)") | ||
| pixelIDsAccessQueue.sync { | ||
| _ = pixelIDsToRemove.insert(pixelMetadata.id) | ||
| } | ||
| continue | ||
| } | ||
|
|
||
| var pixelParameters = pixelMetadata.additionalParameters | ||
| pixelParameters[PixelParameters.retriedPixel] = "1" | ||
|
|
||
| dispatchGroup.enter() | ||
|
|
||
| pixelFiring.fire( | ||
| pixelNamed: pixelMetadata.eventName, | ||
| withAdditionalParameters: pixelParameters, | ||
| includedParameters: pixelMetadata.includedParameters, | ||
| onComplete: { error in | ||
| if error == nil { | ||
| pixelIDsAccessQueue.sync { | ||
| _ = pixelIDsToRemove.insert(pixelMetadata.id) | ||
| } | ||
| } | ||
|
|
||
| dispatchGroup.leave() | ||
| } | ||
| ) | ||
| } | ||
|
|
||
| dispatchGroup.notify(queue: .global()) { | ||
| completion(pixelIDsToRemove) | ||
| } | ||
| } | ||
|
|
||
| } |
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