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| import type { Conversation } from "$lib/types/Conversation"; | |
| import type { Message } from "$lib/types/Message"; | |
| import { v4 } from "uuid"; | |
| export function addSibling( | |
| conv: Pick<Conversation, "messages" | "rootMessageId">, | |
| message: Omit<Message, "id">, | |
| siblingId: Message["id"] | |
| ): Message["id"] { | |
| if (conv.messages.length === 0) { | |
| throw new Error("Cannot add a sibling to an empty conversation"); | |
| } | |
| if (!conv.rootMessageId) { | |
| throw new Error("Cannot add a sibling to a legacy conversation"); | |
| } | |
| const sibling = conv.messages.find((m) => m.id === siblingId); | |
| if (!sibling) { | |
| throw new Error("The sibling message doesn't exist"); | |
| } | |
| if (!sibling.ancestors || sibling.ancestors?.length === 0) { | |
| throw new Error("The sibling message is the root message, therefore we can't add a sibling"); | |
| } | |
| const messageId = v4(); | |
| conv.messages.push({ | |
| ...message, | |
| id: messageId, | |
| ancestors: sibling.ancestors, | |
| children: [], | |
| }); | |
| const nearestAncestorId = sibling.ancestors[sibling.ancestors.length - 1]; | |
| const nearestAncestor = conv.messages.find((m) => m.id === nearestAncestorId); | |
| if (nearestAncestor) { | |
| if (nearestAncestor.children) { | |
| nearestAncestor.children.push(messageId); | |
| } else nearestAncestor.children = [messageId]; | |
| } | |
| return messageId; | |
| } | |