108 lines
4.7 KiB
Swift
108 lines
4.7 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import GRDB
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import SessionUtilitiesKit
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public enum DisappearingMessagesJob: JobExecutor {
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public static let maxFailureCount: Int = -1
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public static let requiresThreadId: Bool = false
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public static let requiresInteractionId: Bool = false
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public static func run(
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_ job: Job,
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success: @escaping (Job, Bool) -> (),
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failure: @escaping (Job, Error?, Bool) -> (),
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deferred: @escaping (Job) -> ()
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) {
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// The 'backgroundTask' gets captured and cleared within the 'completion' block
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let timestampNowMs: TimeInterval = (Date().timeIntervalSince1970 * 1000)
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var backgroundTask: OWSBackgroundTask? = OWSBackgroundTask(label: #function)
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let updatedJob: Job? = GRDBStorage.shared.write { db in
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_ = try Interaction
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.filter(Interaction.Columns.expiresStartedAtMs != nil)
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.filter((Interaction.Columns.expiresStartedAtMs + (Interaction.Columns.expiresInSeconds * 1000)) <= timestampNowMs)
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.deleteAll(db)
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// Update the next run timestamp for the DisappearingMessagesJob (if the call
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// to 'updateNextRunIfNeeded' returns 'nil' then it doesn't need to re-run so
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// should have it's 'nextRunTimestamp' cleared)
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return updateNextRunIfNeeded(db)
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.defaulting(
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to: try job
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.with(nextRunTimestamp: 0)
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.saved(db)
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)
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}
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success(updatedJob ?? job, false)
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// The 'if' is only there to prevent the "variable never read" warning from showing
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if backgroundTask != nil { backgroundTask = nil }
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}
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}
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// MARK: - Convenience
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public extension DisappearingMessagesJob {
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@discardableResult static func updateNextRunIfNeeded(_ db: Database) -> Job? {
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// Don't run when inactive or not in main app
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guard (UserDefaults.sharedLokiProject?[.isMainAppActive]).defaulting(to: false) else { return nil }
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// If there is another expiring message then update the job to run 1 second after it's meant to expire
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let nextExpirationTimestampMs: Double? = try? Interaction
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.filter(Interaction.Columns.expiresStartedAtMs != nil)
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.filter(Interaction.Columns.expiresInSeconds != nil)
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.select(Interaction.Columns.expiresStartedAtMs + (Interaction.Columns.expiresInSeconds * 1000))
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.order((Interaction.Columns.expiresStartedAtMs + (Interaction.Columns.expiresInSeconds * 1000)).asc)
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.asRequest(of: Double.self)
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.fetchOne(db)
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guard let nextExpirationTimestampMs: Double = nextExpirationTimestampMs else { return nil }
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return try? Job
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.filter(Job.Columns.variant == Job.Variant.disappearingMessages)
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.fetchOne(db)?
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.with(nextRunTimestamp: ((nextExpirationTimestampMs / 1000) + 1))
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.saved(db)
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}
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@discardableResult static func updateNextRunIfNeeded(_ db: Database, interactionIds: [Int64], startedAtMs: Double) -> Job? {
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// Update the expiring messages expiresStartedAtMs value
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let changeCount: Int? = try? Interaction
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.filter(interactionIds.contains(Interaction.Columns.id))
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.filter(
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Interaction.Columns.expiresInSeconds != nil &&
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Interaction.Columns.expiresStartedAtMs == nil
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)
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.updateAll(db, Interaction.Columns.expiresStartedAtMs.set(to: startedAtMs))
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// If there were no changes then none of the provided `interactionIds` are expiring messages
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guard (changeCount ?? 0) > 0 else { return nil }
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return updateNextRunIfNeeded(db)
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}
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@discardableResult static func updateNextRunIfNeeded(_ db: Database, interaction: Interaction, startedAtMs: Double) -> Job? {
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guard interaction.isExpiringMessage else { return nil }
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// Don't clobber if multiple actions simultaneously triggered expiration
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guard interaction.expiresStartedAtMs == nil || (interaction.expiresStartedAtMs ?? 0) > startedAtMs else {
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return nil
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}
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do {
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guard let interactionId: Int64 = try? (interaction.id ?? interaction.inserted(db).id) else {
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throw StorageError.objectNotFound
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}
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return updateNextRunIfNeeded(db, interactionIds: [interactionId], startedAtMs: startedAtMs)
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}
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catch {
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SNLog("Failed to update the expiring messages timer on an interaction")
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return nil
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}
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}
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}
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