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| import type { Conversation } from "$lib/types/Conversation"; | |
| import type { Message } from "$lib/types/Message"; | |
| export function buildSubtree( | |
| conv: Pick<Conversation, "messages" | "rootMessageId">, | |
| id: Message["id"] | |
| ): Message[] { | |
| if (!conv.rootMessageId) { | |
| if (conv.messages.length === 0) return []; | |
| // legacy conversation slice up to id | |
| const index = conv.messages.findIndex((m) => m.id === id); | |
| if (index === -1) throw new Error("Message not found"); | |
| return conv.messages.slice(0, index + 1); | |
| } else { | |
| // find the message with the right id then create the ancestor tree | |
| const message = conv.messages.find((m) => m.id === id); | |
| if (!message) throw new Error("Message not found"); | |
| return [ | |
| ...(message.ancestors?.map((ancestorId) => { | |
| const ancestor = conv.messages.find((m) => m.id === ancestorId); | |
| if (!ancestor) throw new Error("Ancestor not found"); | |
| return ancestor; | |
| }) ?? []), | |
| message, | |
| ]; | |
| } | |
| } | |