// 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()

  const follow_check = await db.collection('follow')
    .where({
      user_id: OPENID,
      pub_id: event.pub_id || ''
    })
    .get()
  if (follow_check.data.length === 0) {
    return {
      errMsg: '社团组织不存在',
      status: 'ERR'
    }
  }

  const follow = await db.collection('follow')
    .where({
      user_id: OPENID,
      pub_id: event.pub_id
    })
    .remove()

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