LZH-YS1998
31 lines
1.4 KiB
TypeScript
31 lines
1.4 KiB
TypeScript
import type { ChatMessage } from '../types/chat'
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export function stableMessageTimelineKey(message: ChatMessage): string {
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const metadata = message.metadata ?? {}
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const checkpointId = String(metadata.checkpoint_id ?? '').trim()
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if (checkpointId) return `checkpoint:${checkpointId}`
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const uiMessageId = String(metadata.ui_message_id ?? '').trim()
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const transcriptKind = String(metadata.transcript_kind ?? metadata.kind ?? '').trim()
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const metadataRole = String((metadata as Record<string, unknown>).role ?? '').trim().toLowerCase()
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const isUserTurn = message.sender === 'user'
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|| metadataRole === 'user'
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|| transcriptKind === 'runtime_v2_user_turn'
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|| transcriptKind === 'top_level_user_turn'
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// The optimistic and persisted user surfaces share one client identity.
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if (isUserTurn && uiMessageId) return `ui:${uiMessageId}`
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// ChatStore attaches this only when one semantic result surface replaces
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// another. It preserves the already-mounted row without entering protocol
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// or persistence data.
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const retainedTimelineId = String(metadata.ui_timeline_id ?? '').trim()
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if (retainedTimelineId) return retainedTimelineId
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const turnId = String(metadata.canonical_turn_id ?? metadata.turn_id ?? '').trim()
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if (!isUserTurn && turnId && transcriptKind === 'runtime_v2_assistant') {
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return `turn:assistant:${turnId}`
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}
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return `message:${message.id}`
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}
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