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// Copyright © 2023 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import Combine
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import GRDB
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import SignalCoreKit
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import SessionUtilitiesKit
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import SessionSnodeKit
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public enum GroupLeavingJob: JobExecutor {
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public static var maxFailureCount: Int = 0
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public static var requiresThreadId: Bool = true
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public static var requiresInteractionId: Bool = true
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public static func run(
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_ job: Job,
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queue: DispatchQueue,
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success: @escaping (Job, Bool, Dependencies) -> (),
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failure: @escaping (Job, Error?, Bool, Dependencies) -> (),
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deferred: @escaping (Job, Dependencies) -> (),
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using dependencies: Dependencies = Dependencies()
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) {
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guard
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let detailsData: Data = job.details,
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let details: Details = try? JSONDecoder().decode(Details.self, from: detailsData),
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let threadId: String = job.threadId,
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let interactionId: Int64 = job.interactionId
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else {
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SNLog("[GroupLeavingJob] Failed due to missing details")
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return failure(job, JobRunnerError.missingRequiredDetails, true, dependencies)
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}
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let destination: Message.Destination = .closedGroup(groupPublicKey: threadId)
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dependencies.storage
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.writePublisher { db in
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guard (try? SessionThread.exists(db, id: threadId)) == true else {
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SNLog("[GroupLeavingJob] Failed due to non-existent group conversation")
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throw MessageSenderError.noThread
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}
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guard (try? ClosedGroup.exists(db, id: threadId)) == true else {
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SNLog("[GroupLeavingJob] Failed due to non-existent group")
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throw MessageSenderError.invalidClosedGroupUpdate
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}
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return try MessageSender.preparedSendData(
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db,
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message: ClosedGroupControlMessage(
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kind: .memberLeft
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),
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to: destination,
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namespace: destination.defaultNamespace,
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interactionId: job.interactionId,
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isSyncMessage: false,
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using: dependencies
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)
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}
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.flatMap { MessageSender.sendImmediate(data: $0, using: dependencies) }
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.subscribe(on: queue)
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.receive(on: queue)
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.sinkUntilComplete(
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receiveCompletion: { result in
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let failureChanges: [ConfigColumnAssignment] = [
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Interaction.Columns.variant
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.set(to: Interaction.Variant.infoClosedGroupCurrentUserErrorLeaving),
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Interaction.Columns.body.set(to: "group_unable_to_leave".localized())
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]
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let successfulChanges: [ConfigColumnAssignment] = [
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Interaction.Columns.variant
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.set(to: Interaction.Variant.infoClosedGroupCurrentUserLeft),
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Interaction.Columns.body.set(to: "GROUP_YOU_LEFT".localized())
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]
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// Handle the appropriate response
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dependencies.storage.writeAsync { db in
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// If it failed due to one of these errors then clear out any associated data (as somehow
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// the 'SessionThread' exists but not the data required to send the 'MEMBER_LEFT' message
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// which would leave the user in a state where they can't leave the group)
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let errorsToSucceed: [MessageSenderError] = [
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.invalidClosedGroupUpdate,
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.noKeyPair
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]
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let shouldSucceed: Bool = {
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switch result {
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case .failure(let error as MessageSenderError): return errorsToSucceed.contains(error)
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case .failure: return false
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default: return true
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}
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}()
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// Update the transaction
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try Interaction
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.filter(id: interactionId)
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.updateAll(
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db,
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(shouldSucceed ? successfulChanges : failureChanges)
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)
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// If we succeed in leaving then we should try to clear the group data
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guard shouldSucceed else { return }
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// Update the group (if the admin leaves the group is disbanded)
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let currentUserPublicKey: String = getUserHexEncodedPublicKey(db)
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let wasAdminUser: Bool = GroupMember
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.filter(GroupMember.Columns.groupId == threadId)
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.filter(GroupMember.Columns.profileId == currentUserPublicKey)
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.filter(GroupMember.Columns.role == GroupMember.Role.admin)
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.isNotEmpty(db)
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if wasAdminUser {
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try GroupMember
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.filter(GroupMember.Columns.groupId == threadId)
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.deleteAll(db)
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}
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else {
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try GroupMember
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.filter(GroupMember.Columns.groupId == threadId)
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.filter(GroupMember.Columns.profileId == currentUserPublicKey)
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.deleteAll(db)
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}
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// Clear out the group info as needed
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try ClosedGroup.removeKeysAndUnsubscribe(
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db,
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threadId: threadId,
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removeGroupData: details.deleteThread,
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calledFromConfigHandling: false
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)
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}
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success(job, false, dependencies)
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}
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)
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}
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}
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// MARK: - GroupLeavingJob.Details
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extension GroupLeavingJob {
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public struct Details: Codable {
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private enum CodingKeys: String, CodingKey {
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case deleteThread
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}
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public let deleteThread: Bool
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// MARK: - Initialization
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public init(deleteThread: Bool) {
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self.deleteThread = deleteThread
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}
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// MARK: - Codable
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public init(from decoder: Decoder) throws {
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let container: KeyedDecodingContainer<CodingKeys> = try decoder.container(keyedBy: CodingKeys.self)
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self = Details(
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deleteThread: try container.decode(Bool.self, forKey: .deleteThread)
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)
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}
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public func encode(to encoder: Encoder) throws {
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var container: KeyedEncodingContainer<CodingKeys> = encoder.container(keyedBy: CodingKeys.self)
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try container.encode(deleteThread, forKey: .deleteThread)
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}
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}
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}
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