// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()
const db = cloud.database()

// 云函数入口函数
exports.main = async (event, context) => {
  const {
    OPENID
  } = cloud.getWXContext()

  try {
    await db.collection('publisher')
      .doc(event.pub_id)
      .get()
  } catch (err) {
    return {
      errMsg: '社团组织不存在',
      status: 'ERR'
    }
  }

  const follow = await db.collection('follow')
    .add({
      data: {
        user_id: OPENID,
        pub_id: event.pub_id || '',
        follow_time: new Date()
      }
    })

  return {
    _id: follow._id,
    status: 'OK'
  }
}