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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。
