session-ios/SignalUtilitiesKit/Messaging/ConfigurationMessage+Convenience.swift

extension ConfigurationMessage {

    public static func getCurrent() -> ConfigurationMessage? {
        let storage = Storage.shared
        guard let user = storage.getUser() else { return nil }
        let displayName = user.name
        let profilePictureURL = user.profilePictureURL
        let profileKey = user.profileEncryptionKey?.keyData
        var closedGroups: Set<ClosedGroup> = []
        var openGroups: Set<String> = []
        var contacts: Set<Contact> = []
        var contactCount = 0
        Storage.read { transaction in
            TSGroupThread.enumerateCollectionObjects(with: transaction) { object, _ in
                guard let thread = object as? TSGroupThread else { return }
                switch thread.groupModel.groupType {
                case .closedGroup:
                    guard thread.isCurrentUserMemberInGroup() else { return }
                    let groupID = thread.groupModel.groupId
                    let groupPublicKey = LKGroupUtilities.getDecodedGroupID(groupID)
                    guard storage.isClosedGroup(groupPublicKey),
                        let encryptionKeyPair = storage.getLatestClosedGroupEncryptionKeyPair(for: groupPublicKey) else { return }
                    let closedGroup = ClosedGroup(publicKey: groupPublicKey, name: thread.groupModel.groupName!, encryptionKeyPair: encryptionKeyPair,
                        members: Set(thread.groupModel.groupMemberIds), admins: Set(thread.groupModel.groupAdminIds), expirationTimer: thread.disappearingMessagesDuration(with: transaction))
                    closedGroups.insert(closedGroup)
                case .openGroup:
                    if let v2OpenGroup = storage.getV2OpenGroup(for: thread.uniqueId!) {
                        openGroups.insert("\(v2OpenGroup.server)/\(v2OpenGroup.room)?public_key=\(v2OpenGroup.publicKey)")
                    }
                default: break
                }
            }
            var truncatedContacts = storage.getAllContacts()
            if truncatedContacts.count > 200 { truncatedContacts = Set(Array(truncatedContacts)[0..<200]) }
            truncatedContacts.forEach { contact in
                let publicKey = contact.sessionID
                let threadID = TSContactThread.threadID(fromContactSessionID: publicKey)
                guard let thread = TSContactThread.fetch(uniqueId: threadID, transaction: transaction), thread.shouldBeVisible
                    && !SSKEnvironment.shared.blockingManager.isRecipientIdBlocked(publicKey) else { return }
                let profilePictureURL = contact.profilePictureURL
                let profileKey = contact.profileEncryptionKey?.keyData
                let contact = ConfigurationMessage.Contact(publicKey: publicKey, displayName: contact.name ?? publicKey,
                    profilePictureURL: profilePictureURL, profileKey: profileKey)
                contacts.insert(contact)
                contactCount += 1
            }
        }
        return ConfigurationMessage(displayName: displayName, profilePictureURL: profilePictureURL, profileKey: profileKey,
            closedGroups: closedGroups, openGroups: openGroups, contacts: contacts)
    }
}