return readString(value.chat_id) ?? null;

}

function firstString(...values: unknown[]): string | undefined {

for (const value of values) {

const stringValue = readString(value);

const trimmed = stringValue?.trim();

if (trimmed) {

return trimmed;

}

}

return undefined;

}

function parseFeishuCardActionEventPayload(value: unknown): FeishuCardActionEvent | null {

if (!isRecord(value)) {

return null;

}

const operator = value.operator;

const operator = isRecord(value.operator) ? value.operator : {};

const action = value.action;

const context = value.context;

if (!isRecord(operator) || !isRecord(action) || !isRecord(context)) {

const context = isRecord(value.context) ? value.context : {};

if (!isRecord(action)) {

return null;

}

const token = readString(value.token);

const openId = readString(operator.open_id);

const userId = readString(operator.user_id);

const unionId = readString(operator.union_id);

const openId = firstString(operator.open_id, value.open_id, context.open_id);

const userId = firstString(operator.user_id, value.user_id, context.user_id);

const unionId = firstString(operator.union_id);

const tag = readString(action.tag);

const actionValue = action.value;

const contextOpenId = readString(context.open_id);

const contextUserId = readString(context.user_id);

const chatId = readString(context.chat_id);

if (

!token ||

!openId ||

!userId ||

!unionId ||

!tag ||

!isRecord(actionValue) ||

!contextOpenId ||

!contextUserId ||

!chatId

) {

const contextOpenId = firstString(context.open_id, openId);

const contextUserId = firstString(context.user_id, userId);

const chatId = firstString(context.chat_id, context.open_chat_id);

if (!token || !openId || !tag || !isRecord(actionValue)) {

return null;

}

return {

operator: {

open_id: openId,

user_id: userId,

union_id: unionId,

...(userId ? { user_id: userId } : {}),

...(unionId ? { union_id: unionId } : {}),

},

token,

action: {

value: actionValue,

tag,

},

context: {

open_id: contextOpenId,

user_id: contextUserId,

chat_id: chatId,

...(contextOpenId ? { open_id: contextOpenId } : {}),

...(contextUserId ? { user_id: contextUserId } : {}),

...(chatId ? { chat_id: chatId } : {}),

},

};

}