Function upsertItem

src/utils/threadItems.listOps.ts:28–127

(list: ConversationItem[], item: ConversationItem)

}

export function upsertItem(list: ConversationItem[], item: ConversationItem) {
  const index = list.findIndex((entry) => entry.id === item.id);
  if (index === -1) {
    return [...list, item];
  }
  const existing = list[index];
  const next = [...list];

  if (existing.kind !== item.kind) {
    next[index] = item;
    return next;
  }

  if (existing.kind === "message" && item.kind === "message") {
    const existingText = existing.text ?? "";
    const incomingText = item.text ?? "";
    next[index] = {
      ...existing,
      ...item,
      text: incomingText.length >= existingText.length ? incomingText : existingText,
      images: item.images?.length ? item.images : existing.images,
    };
    return next;
  }

  if (existing.kind === "userInput" && item.kind === "userInput") {
    next[index] = {
      ...existing,
      ...item,
      questions: mergeUserInputQuestions(existing.questions, item.questions),
    };
    return next;
  }

  if (existing.kind === "reasoning" && item.kind === "reasoning") {
    const existingSummary = existing.summary ?? "";
    const incomingSummary = item.summary ?? "";
    const existingContent = existing.content ?? "";
    const incomingContent = item.content ?? "";
    next[index] = {
      ...existing,
      ...item,
      summary:
        incomingSummary.length >= existingSummary.length
          ? incomingSummary
          : existingSummary,
      content:
        incomingContent.length >= existingContent.length
          ? incomingContent
          : existingContent,
    };
    return next;
  }

  if (existing.kind === "tool" && item.kind === "tool") {
    const existingOutput = existing.output ?? "";
    const incomingOutput = item.output ?? "";
    const hasIncomingOutput = incomingOutput.trim().length > 0;