package com.peachpasswords.sync

import kotlinx.coroutines.CompletableDeferred

/**
 * The user's SAS decision, handed to the UI and awaited by the live pairing
 * session.
 *
 * The handler blocks inside the connection while the two screens are compared,
 * so the decision has to reach it out of band rather than as a return value.
 *
 * Lived in the retired LAN `CodePairingServer` until relay-only pairing
 * (docs/sync-lan-retirement.md); it was never LAN-specific.
 */
class PairingSession internal constructor() {
    private val decision = CompletableDeferred<Boolean>()

    fun confirm(matches: Boolean) {
        decision.complete(matches)
    }

    internal suspend fun await(): Boolean = decision.await()
}