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ichmagmaus111andClaude Opus 5.5
0622057a4f
Ghostgram for iOS, rebuilt from scratch on Telegram iOS 13.0. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
33 lines
2.0 KiB
Swift
33 lines
2.0 KiB
Swift
import Foundation
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import Postbox
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/// Whether an outgoing reply must carry an explicit `reply_to_peer_id`.
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///
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/// It obviously must when the replied message lives in another peer. It must *also* when the
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/// destination is a forum and the replied message sits in a different topic of that same forum:
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/// the server routes a forum reply into the replied message's topic unless the reply is marked
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/// external (`reply_to_peer_id` present), regardless of `top_msg_id`. Telegram Desktop marks the
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/// reply external in exactly this case; without it, "Reply in Another Chat" into a sibling topic
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/// lands the message back in the source topic (bugs.telegram.org/c/37773).
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///
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/// The topic comparison is gated on the destination being a forum on purpose. Outside forums the
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/// stored `threadId` conflates comment-thread roots with the `1` default that every channel message
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/// without a reply header receives, so an un-gated comparison flags an ordinary reply to a comment
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/// thread's root message as external. That is what the 2026-04 attempt did before it was rolled back.
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///
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/// `replyThreadId` should be the replied message's *live* stored `threadId` where a transaction is at
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/// hand, falling back to the enqueue-time snapshot on `ReplyMessageAttribute.threadMessageId` — the
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/// snapshot is nil when the replied message was not in the store at enqueue time, and a nil here
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/// disables the topic comparison. Known gap: bot forums (a `TelegramUser` with `hasForum`) store no
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/// default thread id for messages outside a topic (`StoreMessage_Telegram` only defaults channels to
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/// `1`), so such a reply is not marked external; that feature is still gated `TODO:release`.
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func outgoingReplyRequiresExplicitPeer(destinationPeer: Peer, destinationThreadId: Int64?, replyMessageId: MessageId, replyThreadId: Int64?) -> Bool {
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if replyMessageId.peerId != destinationPeer.id {
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return true
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}
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guard destinationPeer.isForum, let destinationThreadId, let replyThreadId else {
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return false
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}
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return destinationThreadId != replyThreadId
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}
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