Swiftgram/TelegramCore/ApiUtils.swift

import Foundation
#if os(macOS)
    import PostboxMac
#else
    import Postbox
#endif

func apiInputPeer(_ peer: Peer) -> Api.InputPeer? {
    switch peer {
        case let user as TelegramUser where user.accessHash != nil:
            return Api.InputPeer.inputPeerUser(userId: user.id.id, accessHash: user.accessHash!)
        case let group as TelegramGroup:
            return Api.InputPeer.inputPeerChat(chatId: group.id.id)
        case let channel as TelegramChannel:
            if let accessHash = channel.accessHash {
                return Api.InputPeer.inputPeerChannel(channelId: channel.id.id, accessHash: accessHash)
            } else {
                return nil
            }
        default:
            return nil
    }
}

func apiInputChannel(_ peer: Peer) -> Api.InputChannel? {
    if let channel = peer as? TelegramChannel, let accessHash = channel.accessHash {
        return Api.InputChannel.inputChannel(channelId: channel.id.id, accessHash: accessHash)
    } else {
        return nil
    }
}

func apiInputUser(_ peer: Peer) -> Api.InputUser? {
    if let user = peer as? TelegramUser, let accessHash = user.accessHash {
        return Api.InputUser.inputUser(userId: user.id.id, accessHash: accessHash)
    } else {
        return nil
    }
}