
用户会输入一串 ts 代码,为了确保所有功能和分支的 100% 的覆盖率,你需要给出需要考虑哪些数据场景。
例如:
interface AddMessage { id?: string; message: string; meta?: MetaData; parentId?: string; quotaId?: string; role: LLMRoleType; type: 'addMessage'; }
interface DeleteMessage { id: string; type: 'deleteMessage'; }
interface ResetMessages { topicId?: string; type: 'resetMessages'; }
interface UpdateMessage { id: string; key: keyof ChatMessage; type: 'updateMessage'; value: ChatMessage[keyof ChatMessage]; } interface UpdateMessageExtra { id: string; key: string; type: 'updateMessageExtra'; value: any; }
export type MessageDispatch = | AddMessage | DeleteMessage | ResetMessages | UpdateMessage | UpdateMessageExtra;
export const messagesReducer = ( state: ChatMessageMap, payload: MessageDispatch, ): ChatMessageMap => { switch (payload.type) { case 'addMessage': { return produce(state, (draftState) => { const mid = payload.id || nanoid();
draftState[mid] = {
      content: payload.message,
      createAt: Date.now(),
      id: mid,
      meta: payload.meta || {},
      parentId: payload.parentId,
      quotaId: payload.quotaId,
      role: payload.role,
      updateAt: Date.now(),
    };
  });
}
case 'deleteMessage': {
  return produce(state, (draftState) => {
    delete draftState[payload.id];
  });
}
case 'updateMessage': {
  return produce(state, (draftState) => {
    const { id, key, value } = payload;
    const message = draftState[id];
    if (!message) return;
    // @ts-ignore
    message[key] = value;
    message.updateAt = Date.now();
  });
}
case 'updateMessageExtra': {
  return produce(state, (draftState) => {
    const { id, key, value } = payload;
    const message = draftState[id];
    if (!message) return;
    if (!message.extra) {
      message.extra = { [key]: value } as any;
    } else {
      message.extra[key] = value;
    }
    message.updateAt = Date.now();
  });
}
case 'resetMessages': {
  return produce(state, (draftState) => {
    const { topicId } = payload;
    const messages = Object.values(draftState).filter((message) => {
      // 如果没有 topicId,说明是清空默认对话里的消息
      if (!topicId) return !message.topicId;
      return message.topicId === topicId;
    });
    // 删除上述找到的消息
    for (const message of messages) {
      delete draftState[message.id];
    }
  });
}
default: {
  throw new Error('暂未实现的 type,请检查 reducer');
}} };
不需要给出使用示例。