746 lines
31 KiB
Swift
746 lines
31 KiB
Swift
// Copyright © 2023 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import GRDB
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import Sodium
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import SessionUtil
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import SessionUtilitiesKit
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import SessionSnodeKit
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// TODO: Expose 'GROUP_NAME_MAX_LENGTH', 'COMMUNITY_URL_MAX_LENGTH' & 'COMMUNITY_ROOM_MAX_LENGTH'
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internal extension SessionUtil {
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static let columnsRelatedToUserGroups: [ColumnExpression] = [
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ClosedGroup.Columns.name
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]
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// MARK: - Incoming Changes
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static func handleGroupsUpdate(
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_ db: Database,
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in conf: UnsafeMutablePointer<config_object>?,
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mergeNeedsDump: Bool,
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latestConfigUpdateSentTimestamp: TimeInterval
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) throws {
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guard mergeNeedsDump else { return }
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guard conf != nil else { throw SessionUtilError.nilConfigObject }
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var communities: [PrioritisedData<OpenGroupUrlInfo>] = []
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var legacyGroups: [LegacyGroupInfo] = []
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var community: ugroups_community_info = ugroups_community_info()
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var legacyGroup: ugroups_legacy_group_info = ugroups_legacy_group_info()
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let groupsIterator: OpaquePointer = user_groups_iterator_new(conf)
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while !user_groups_iterator_done(groupsIterator) {
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if user_groups_it_is_community(groupsIterator, &community) {
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let server: String = String(libSessionVal: community.base_url)
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let roomToken: String = String(libSessionVal: community.room)
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communities.append(
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PrioritisedData(
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data: OpenGroupUrlInfo(
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threadId: OpenGroup.idFor(roomToken: roomToken, server: server),
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server: server,
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roomToken: roomToken,
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publicKey: Data(
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libSessionVal: community.pubkey,
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count: OpenGroup.pubkeyByteLength
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).toHexString()
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),
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priority: community.priority
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)
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)
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}
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else if user_groups_it_is_legacy_group(groupsIterator, &legacyGroup) {
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let groupId: String = String(libSessionVal: legacyGroup.session_id)
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let membersIt: OpaquePointer = ugroups_legacy_members_begin(&legacyGroup)
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var members: [String: Bool] = [:]
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var maybeMemberSessionId: UnsafePointer<CChar>? = nil
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var memberAdmin: Bool = false
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while ugroups_legacy_members_next(membersIt, &maybeMemberSessionId, &memberAdmin) {
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guard let memberSessionId: UnsafePointer<CChar> = maybeMemberSessionId else {
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continue
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}
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members[String(cString: memberSessionId)] = memberAdmin
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}
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legacyGroups.append(
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LegacyGroupInfo(
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id: groupId,
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name: String(libSessionVal: legacyGroup.name),
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lastKeyPair: ClosedGroupKeyPair(
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threadId: groupId,
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publicKey: Data(
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libSessionVal: legacyGroup.enc_pubkey,
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count: ClosedGroup.pubkeyByteLength
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),
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secretKey: Data(
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libSessionVal: legacyGroup.enc_seckey,
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count: ClosedGroup.secretKeyByteLength
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),
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receivedTimestamp: (TimeInterval(SnodeAPI.currentOffsetTimestampMs()) / 1000)
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),
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disappearingConfig: DisappearingMessagesConfiguration
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.defaultWith(groupId)
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.with(
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isEnabled: (legacyGroup.disappearing_timer > 0),
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durationSeconds: TimeInterval(legacyGroup.disappearing_timer)
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),
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groupMembers: members
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.filter { _, isAdmin in !isAdmin }
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.map { memberId, admin in
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GroupMember(
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groupId: groupId,
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profileId: memberId,
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role: .standard,
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isHidden: false
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)
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},
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groupAdmins: members
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.filter { _, isAdmin in isAdmin }
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.map { memberId, admin in
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GroupMember(
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groupId: groupId,
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profileId: memberId,
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role: .admin,
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isHidden: false
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)
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},
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hidden: legacyGroup.hidden,
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priority: legacyGroup.priority
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)
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)
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}
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else {
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SNLog("Ignoring unknown conversation type when iterating through volatile conversation info update")
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}
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user_groups_iterator_advance(groupsIterator)
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}
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user_groups_iterator_free(groupsIterator) // Need to free the iterator
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// If we don't have any conversations then no need to continue
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guard !communities.isEmpty || !legacyGroups.isEmpty else { return }
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// Extract all community/legacyGroup/group thread priorities
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let existingThreadInfo: [String: PriorityVisibilityInfo] = (try? SessionThread
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.select(.id, .variant, .pinnedPriority, .shouldBeVisible)
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.filter(
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[
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SessionThread.Variant.community,
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SessionThread.Variant.legacyGroup,
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SessionThread.Variant.group
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].contains(SessionThread.Columns.variant)
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)
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.asRequest(of: PriorityVisibilityInfo.self)
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.fetchAll(db))
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.defaulting(to: [])
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.reduce(into: [:]) { result, next in result[next.id] = next }
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// MARK: -- Handle Community Changes
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// Add any new communities (via the OpenGroupManager)
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communities.forEach { community in
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OpenGroupManager.shared
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.add(
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db,
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roomToken: community.data.roomToken,
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server: community.data.server,
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publicKey: community.data.publicKey,
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calledFromConfigHandling: true
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)
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.sinkUntilComplete()
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// Set the priority if it's changed (new communities will have already been inserted at
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// this stage)
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if existingThreadInfo[community.data.threadId]?.pinnedPriority != community.priority {
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_ = try? SessionThread
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.filter(id: community.data.threadId)
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.updateAll( // Handling a config update so don't use `updateAllAndConfig`
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db,
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SessionThread.Columns.pinnedPriority.set(to: community.priority)
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)
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}
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}
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// Remove any communities which are no longer in the config
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let communityIdsToRemove: Set<String> = Set(existingThreadInfo
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.filter { $0.value.variant == .community }
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.keys)
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.subtracting(communities.map { $0.data.threadId })
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communityIdsToRemove.forEach { threadId in
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OpenGroupManager.shared.delete(
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db,
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openGroupId: threadId,
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calledFromConfigHandling: true
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)
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}
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// MARK: -- Handle Legacy Group Changes
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let existingLegacyGroupIds: Set<String> = Set(existingThreadInfo
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.filter { $0.value.variant == .legacyGroup }
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.keys)
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let existingLegacyGroups: [String: ClosedGroup] = (try? ClosedGroup
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.fetchAll(db, ids: existingLegacyGroupIds))
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.defaulting(to: [])
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.reduce(into: [:]) { result, next in result[next.id] = next }
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let existingLegacyGroupMembers: [String: [GroupMember]] = (try? GroupMember
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.filter(existingLegacyGroupIds.contains(GroupMember.Columns.groupId))
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.fetchAll(db))
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.defaulting(to: [])
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.grouped(by: \.groupId)
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try legacyGroups.forEach { group in
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guard
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let name: String = group.name,
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let lastKeyPair: ClosedGroupKeyPair = group.lastKeyPair,
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let members: [GroupMember] = group.groupMembers,
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let updatedAdmins: [GroupMember] = group.groupAdmins
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else { return }
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if !existingLegacyGroupIds.contains(group.id) {
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// Add a new group if it doesn't already exist
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try MessageReceiver.handleNewClosedGroup(
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db,
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groupPublicKey: group.id,
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name: name,
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encryptionKeyPair: Box.KeyPair(
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publicKey: lastKeyPair.publicKey.bytes,
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secretKey: lastKeyPair.secretKey.bytes
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),
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members: members
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.appending(contentsOf: updatedAdmins) // Admins should also have 'standard' member entries
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.map { $0.profileId },
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admins: updatedAdmins.map { $0.profileId },
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expirationTimer: UInt32(group.disappearingConfig?.durationSeconds ?? 0),
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messageSentTimestamp: UInt64(latestConfigUpdateSentTimestamp * 1000),
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calledFromConfigHandling: true
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)
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}
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else {
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// Otherwise update the existing group
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if existingLegacyGroups[group.id]?.name != name {
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_ = try? ClosedGroup
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.filter(id: group.id)
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.updateAll( // Handling a config update so don't use `updateAllAndConfig`
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db,
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ClosedGroup.Columns.name.set(to: name)
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)
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}
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// Add the lastKey if it doesn't already exist
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let keyPairExists: Bool = ClosedGroupKeyPair
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.filter(ClosedGroupKeyPair.Columns.threadKeyPairHash == lastKeyPair.threadKeyPairHash)
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.isNotEmpty(db)
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if !keyPairExists {
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try lastKeyPair.insert(db)
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}
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// Update the disappearing messages timer
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_ = try DisappearingMessagesConfiguration
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.fetchOne(db, id: group.id)
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.defaulting(to: DisappearingMessagesConfiguration.defaultWith(group.id))
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.with(
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isEnabled: (group.disappearingConfig?.isEnabled == true),
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durationSeconds: group.disappearingConfig?.durationSeconds
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)
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.saved(db)
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// Update the members
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let updatedMembers: [GroupMember] = members
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.appending(
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contentsOf: updatedAdmins.map { admin in
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GroupMember(
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groupId: admin.groupId,
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profileId: admin.profileId,
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role: .standard,
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isHidden: false
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)
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}
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)
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if
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let existingMembers: [GroupMember] = existingLegacyGroupMembers[group.id]?
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.filter({ $0.role == .standard || $0.role == .zombie }),
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existingMembers != updatedMembers
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{
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// Add in any new members and remove any removed members
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try updatedMembers.forEach { try $0.save(db) }
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try existingMembers
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.filter { !updatedMembers.contains($0) }
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.forEach { member in
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try GroupMember
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.filter(
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GroupMember.Columns.groupId == group.id &&
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GroupMember.Columns.profileId == member.profileId && (
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GroupMember.Columns.role == GroupMember.Role.standard ||
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GroupMember.Columns.role == GroupMember.Role.zombie
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)
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)
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.deleteAll(db)
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}
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}
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if
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let existingAdmins: [GroupMember] = existingLegacyGroupMembers[group.id]?
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.filter({ $0.role == .admin }),
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existingAdmins != updatedAdmins
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{
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// Add in any new admins and remove any removed admins
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try updatedAdmins.forEach { try $0.save(db) }
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try existingAdmins
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.filter { !updatedAdmins.contains($0) }
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.forEach { member in
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try GroupMember
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.filter(
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GroupMember.Columns.groupId == group.id &&
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GroupMember.Columns.profileId == member.profileId &&
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GroupMember.Columns.role == GroupMember.Role.admin
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)
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.deleteAll(db)
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}
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}
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}
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// Make any thread-specific changes if needed
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let threadChanges: [ConfigColumnAssignment] = [
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(existingThreadInfo[group.id]?.shouldBeVisible == (group.hidden == false) ? nil :
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SessionThread.Columns.shouldBeVisible.set(to: (group.hidden == false))
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),
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(existingThreadInfo[group.id]?.pinnedPriority == group.priority ? nil :
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SessionThread.Columns.pinnedPriority.set(to: group.priority)
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)
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].compactMap { $0 }
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if !threadChanges.isEmpty {
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_ = try? SessionThread
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.filter(id: group.id)
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.updateAll( // Handling a config update so don't use `updateAllAndConfig`
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db,
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threadChanges
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)
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}
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}
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// Remove any legacy groups which are no longer in the config
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let legacyGroupIdsToRemove: Set<String> = existingLegacyGroupIds
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.subtracting(legacyGroups.map { $0.id })
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if !legacyGroupIdsToRemove.isEmpty {
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try ClosedGroup.removeKeysAndUnsubscribe(
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db,
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threadIds: Array(legacyGroupIdsToRemove),
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removeGroupData: true,
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calledFromConfigHandling: true
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)
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}
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// MARK: -- Handle Group Changes
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// TODO: Add this
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}
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// MARK: - Outgoing Changes
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static func upsert(
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legacyGroups: [LegacyGroupInfo],
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in conf: UnsafeMutablePointer<config_object>?
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) throws {
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guard conf != nil else { throw SessionUtilError.nilConfigObject }
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guard !legacyGroups.isEmpty else { return }
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// Since we are doing direct memory manipulation we are using an `Atomic` type which has
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// blocking access in it's `mutate` closure
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legacyGroups
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.forEach { legacyGroup in
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var cGroupId: [CChar] = legacyGroup.id.cArray
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let userGroup: UnsafeMutablePointer<ugroups_legacy_group_info> = user_groups_get_or_construct_legacy_group(conf, &cGroupId)
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// Assign all properties to match the updated group (if there is one)
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if let updatedName: String = legacyGroup.name {
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userGroup.pointee.name = updatedName.toLibSession()
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// Store the updated group (needs to happen before variables go out of scope)
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user_groups_set_legacy_group(conf, userGroup)
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}
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if let lastKeyPair: ClosedGroupKeyPair = legacyGroup.lastKeyPair {
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userGroup.pointee.enc_pubkey = lastKeyPair.publicKey.toLibSession()
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userGroup.pointee.enc_seckey = lastKeyPair.secretKey.toLibSession()
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userGroup.pointee.have_enc_keys = true
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// Store the updated group (needs to happen before variables go out of scope)
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user_groups_set_legacy_group(conf, userGroup)
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}
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// Assign all properties to match the updated disappearing messages config (if there is one)
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if let updatedConfig: DisappearingMessagesConfiguration = legacyGroup.disappearingConfig {
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userGroup.pointee.disappearing_timer = (!updatedConfig.isEnabled ? 0 :
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Int64(floor(updatedConfig.durationSeconds))
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)
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user_groups_set_legacy_group(conf, userGroup)
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}
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// Add the group members and admins
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legacyGroup.groupMembers?.forEach { member in
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var cProfileId: [CChar] = member.profileId.cArray
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ugroups_legacy_member_add(userGroup, &cProfileId, false)
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}
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legacyGroup.groupAdmins?.forEach { member in
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var cProfileId: [CChar] = member.profileId.cArray
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ugroups_legacy_member_add(userGroup, &cProfileId, true)
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}
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// Store the updated group (can't be sure if we made any changes above)
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userGroup.pointee.hidden = (legacyGroup.hidden ?? userGroup.pointee.hidden)
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userGroup.pointee.priority = (legacyGroup.priority ?? userGroup.pointee.priority)
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// Note: Need to free the legacy group pointer
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user_groups_set_free_legacy_group(conf, userGroup)
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}
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}
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static func upsert(
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communities: [CommunityInfo],
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in conf: UnsafeMutablePointer<config_object>?
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) throws {
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guard conf != nil else { throw SessionUtilError.nilConfigObject }
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guard !communities.isEmpty else { return }
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communities
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.forEach { community in
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var cBaseUrl: [CChar] = community.urlInfo.server.cArray
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var cRoom: [CChar] = community.urlInfo.roomToken.cArray
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var cPubkey: [UInt8] = Data(hex: community.urlInfo.publicKey).cArray
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var userCommunity: ugroups_community_info = ugroups_community_info()
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guard user_groups_get_or_construct_community(conf, &userCommunity, &cBaseUrl, &cRoom, &cPubkey) else {
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SNLog("Unable to upsert community conversation to Config Message")
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return
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}
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userCommunity.priority = (community.priority ?? userCommunity.priority)
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user_groups_set_community(conf, &userCommunity)
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}
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}
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}
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// MARK: - External Outgoing Changes
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public extension SessionUtil {
|
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|
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// MARK: -- Communities
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static func add(
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_ db: Database,
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server: String,
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rootToken: String,
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publicKey: String
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) throws {
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// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
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guard Features.useSharedUtilForUserConfig else { return }
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|
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try SessionUtil.performAndPushChange(
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db,
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for: .userGroups,
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publicKey: getUserHexEncodedPublicKey(db)
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) { conf in
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try SessionUtil.upsert(
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communities: [
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CommunityInfo(
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urlInfo: OpenGroupUrlInfo(
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threadId: OpenGroup.idFor(roomToken: rootToken, server: server),
|
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server: server,
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roomToken: rootToken,
|
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publicKey: publicKey
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)
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)
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],
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in: conf
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)
|
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}
|
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}
|
|
|
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static func remove(_ db: Database, server: String, roomToken: String) throws {
|
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// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
|
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guard Features.useSharedUtilForUserConfig else { return }
|
|
|
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try SessionUtil.performAndPushChange(
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db,
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for: .userGroups,
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publicKey: getUserHexEncodedPublicKey(db)
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) { conf in
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var cBaseUrl: [CChar] = server.cArray
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var cRoom: [CChar] = roomToken.cArray
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// Don't care if the community doesn't exist
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user_groups_erase_community(conf, &cBaseUrl, &cRoom)
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}
|
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}
|
|
|
|
// MARK: -- Legacy Group Changes
|
|
|
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static func add(
|
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_ db: Database,
|
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groupPublicKey: String,
|
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name: String,
|
|
latestKeyPairPublicKey: Data,
|
|
latestKeyPairSecretKey: Data,
|
|
latestKeyPairReceivedTimestamp: TimeInterval,
|
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disappearingConfig: DisappearingMessagesConfiguration,
|
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members: Set<String>,
|
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admins: Set<String>
|
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) throws {
|
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// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
|
|
guard Features.useSharedUtilForUserConfig else { return }
|
|
|
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try SessionUtil.performAndPushChange(
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db,
|
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for: .userGroups,
|
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publicKey: getUserHexEncodedPublicKey(db)
|
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) { conf in
|
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try SessionUtil.upsert(
|
|
legacyGroups: [
|
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LegacyGroupInfo(
|
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id: groupPublicKey,
|
|
name: name,
|
|
lastKeyPair: ClosedGroupKeyPair(
|
|
threadId: groupPublicKey,
|
|
publicKey: latestKeyPairPublicKey,
|
|
secretKey: latestKeyPairSecretKey,
|
|
receivedTimestamp: latestKeyPairReceivedTimestamp
|
|
),
|
|
disappearingConfig: disappearingConfig,
|
|
groupMembers: members
|
|
.map { memberId in
|
|
GroupMember(
|
|
groupId: groupPublicKey,
|
|
profileId: memberId,
|
|
role: .standard,
|
|
isHidden: false
|
|
)
|
|
},
|
|
groupAdmins: admins
|
|
.map { memberId in
|
|
GroupMember(
|
|
groupId: groupPublicKey,
|
|
profileId: memberId,
|
|
role: .admin,
|
|
isHidden: false
|
|
)
|
|
}
|
|
)
|
|
],
|
|
in: conf
|
|
)
|
|
}
|
|
}
|
|
|
|
static func update(
|
|
_ db: Database,
|
|
groupPublicKey: String,
|
|
name: String? = nil,
|
|
latestKeyPair: ClosedGroupKeyPair? = nil,
|
|
disappearingConfig: DisappearingMessagesConfiguration? = nil,
|
|
members: Set<String>? = nil,
|
|
admins: Set<String>? = nil
|
|
) throws {
|
|
// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
|
|
guard Features.useSharedUtilForUserConfig else { return }
|
|
|
|
try SessionUtil.performAndPushChange(
|
|
db,
|
|
for: .userGroups,
|
|
publicKey: getUserHexEncodedPublicKey(db)
|
|
) { conf in
|
|
try SessionUtil.upsert(
|
|
legacyGroups: [
|
|
LegacyGroupInfo(
|
|
id: groupPublicKey,
|
|
name: name,
|
|
lastKeyPair: latestKeyPair,
|
|
disappearingConfig: disappearingConfig,
|
|
groupMembers: members?
|
|
.map { memberId in
|
|
GroupMember(
|
|
groupId: groupPublicKey,
|
|
profileId: memberId,
|
|
role: .standard,
|
|
isHidden: false
|
|
)
|
|
},
|
|
groupAdmins: admins?
|
|
.map { memberId in
|
|
GroupMember(
|
|
groupId: groupPublicKey,
|
|
profileId: memberId,
|
|
role: .admin,
|
|
isHidden: false
|
|
)
|
|
}
|
|
)
|
|
],
|
|
in: conf
|
|
)
|
|
}
|
|
}
|
|
|
|
static func hide(_ db: Database, legacyGroupIds: [String]) throws {
|
|
guard !legacyGroupIds.isEmpty else { return }
|
|
|
|
try SessionUtil.performAndPushChange(
|
|
db,
|
|
for: .userGroups,
|
|
publicKey: getUserHexEncodedPublicKey(db)
|
|
) { conf in
|
|
try SessionUtil.upsert(
|
|
legacyGroups: legacyGroupIds.map { groupId in
|
|
LegacyGroupInfo(
|
|
id: groupId,
|
|
hidden: true
|
|
)
|
|
},
|
|
in: conf
|
|
)
|
|
}
|
|
}
|
|
|
|
static func remove(_ db: Database, legacyGroupIds: [String]) throws {
|
|
// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
|
|
guard Features.useSharedUtilForUserConfig else { return }
|
|
guard !legacyGroupIds.isEmpty else { return }
|
|
|
|
try SessionUtil.performAndPushChange(
|
|
db,
|
|
for: .userGroups,
|
|
publicKey: getUserHexEncodedPublicKey(db)
|
|
) { conf in
|
|
legacyGroupIds.forEach { threadId in
|
|
var cGroupId: [CChar] = threadId.cArray
|
|
|
|
// Don't care if the group doesn't exist
|
|
user_groups_erase_legacy_group(conf, &cGroupId)
|
|
}
|
|
}
|
|
}
|
|
|
|
// MARK: -- Group Changes
|
|
|
|
static func hide(_ db: Database, groupIds: [String]) throws {
|
|
guard !groupIds.isEmpty else { return }
|
|
}
|
|
|
|
static func remove(_ db: Database, groupIds: [String]) throws {
|
|
// FIXME: Remove this once `useSharedUtilForUserConfig` is permanent
|
|
guard Features.useSharedUtilForUserConfig else { return }
|
|
guard !groupIds.isEmpty else { return }
|
|
}
|
|
}
|
|
|
|
// MARK: - LegacyGroupInfo
|
|
|
|
extension SessionUtil {
|
|
struct LegacyGroupInfo: Decodable, FetchableRecord, ColumnExpressible {
|
|
typealias Columns = CodingKeys
|
|
enum CodingKeys: String, CodingKey, ColumnExpression, CaseIterable {
|
|
case threadId
|
|
case name
|
|
case lastKeyPair
|
|
case disappearingConfig
|
|
case groupMembers
|
|
case groupAdmins
|
|
case hidden
|
|
case priority
|
|
}
|
|
|
|
var id: String { threadId }
|
|
|
|
let threadId: String
|
|
let name: String?
|
|
let lastKeyPair: ClosedGroupKeyPair?
|
|
let disappearingConfig: DisappearingMessagesConfiguration?
|
|
let groupMembers: [GroupMember]?
|
|
let groupAdmins: [GroupMember]?
|
|
let hidden: Bool?
|
|
let priority: Int32?
|
|
|
|
init(
|
|
id: String,
|
|
name: String? = nil,
|
|
lastKeyPair: ClosedGroupKeyPair? = nil,
|
|
disappearingConfig: DisappearingMessagesConfiguration? = nil,
|
|
groupMembers: [GroupMember]? = nil,
|
|
groupAdmins: [GroupMember]? = nil,
|
|
hidden: Bool? = nil,
|
|
priority: Int32? = nil
|
|
) {
|
|
self.threadId = id
|
|
self.name = name
|
|
self.lastKeyPair = lastKeyPair
|
|
self.disappearingConfig = disappearingConfig
|
|
self.groupMembers = groupMembers
|
|
self.groupAdmins = groupAdmins
|
|
self.hidden = hidden
|
|
self.priority = priority
|
|
}
|
|
|
|
static func fetchAll(_ db: Database) throws -> [LegacyGroupInfo] {
|
|
return try ClosedGroup
|
|
.filter(ClosedGroup.Columns.threadId.like("\(SessionId.Prefix.standard.rawValue)%"))
|
|
.including(
|
|
required: ClosedGroup.keyPairs
|
|
.order(ClosedGroupKeyPair.Columns.receivedTimestamp.desc)
|
|
.forKey(Columns.lastKeyPair.name)
|
|
)
|
|
.including(
|
|
all: ClosedGroup.members
|
|
.filter([GroupMember.Role.standard, GroupMember.Role.zombie]
|
|
.contains(GroupMember.Columns.role))
|
|
.forKey(Columns.groupMembers.name)
|
|
)
|
|
.including(
|
|
all: ClosedGroup.members
|
|
.filter(GroupMember.Columns.role == GroupMember.Role.admin)
|
|
.forKey(Columns.groupAdmins.name)
|
|
)
|
|
.joining(
|
|
optional: ClosedGroup.thread
|
|
.including(
|
|
optional: SessionThread.disappearingMessagesConfiguration
|
|
.forKey(Columns.disappearingConfig.name)
|
|
)
|
|
)
|
|
.asRequest(of: LegacyGroupInfo.self)
|
|
.fetchAll(db)
|
|
}
|
|
}
|
|
|
|
struct CommunityInfo {
|
|
let urlInfo: OpenGroupUrlInfo
|
|
let priority: Int32?
|
|
|
|
init(
|
|
urlInfo: OpenGroupUrlInfo,
|
|
priority: Int32? = nil
|
|
) {
|
|
self.urlInfo = urlInfo
|
|
self.priority = priority
|
|
}
|
|
}
|
|
|
|
fileprivate struct GroupThreadData {
|
|
let communities: [PrioritisedData<SessionUtil.OpenGroupUrlInfo>]
|
|
let legacyGroups: [PrioritisedData<LegacyGroupInfo>]
|
|
let groups: [PrioritisedData<String>]
|
|
}
|
|
|
|
fileprivate struct PrioritisedData<T> {
|
|
let data: T
|
|
let priority: Int32
|
|
}
|
|
}
|