{
  "properties" : { },
  "id" : "6f7a8490b1c2d3e4f5a678904ab",
  "script" : null,
  "groupId" : "f8e3d2c1b0a94e5f8a7b6c5d4e3f2a1",
  "name" : "交易中心实时服务信息",
  "createTime" : 1780877300000,
  "updateTime" : null,
  "lock" : null,
  "createBy" : "admin",
  "updateBy" : "admin",
  "path" : "/exchange-service-info",
  "method" : "GET",
  "parameters" : [ ],
  "options" : [ ],
  "requestBody" : "",
  "headers" : [ ],
  "paths" : [ ],
  "responseBody" : null,
  "description" : "交易中心实时服务信息：牦牛供应/待售/已售、剩余车位、进场车辆、供应商数量（只读）。牦牛=yak_trade_ear_tag_inventory；车位=yak_car_parking_zone；车辆=yak_car_record+yak_trade_entry_record；供应商=yak_sn_customer(SELLER)。",
  "requestBodyDefinition" : null,
  "responseBodyDefinition" : null
}
================================
// 只读查询，不修改任何数据

var sql = """
SELECT
  (SELECT COUNT(*)
   FROM yak_trade_ear_tag_inventory) AS total_supply,
  (SELECT COUNT(*)
   FROM yak_trade_ear_tag_inventory
   WHERE status IN ('AVAILABLE', 'LOCKED')) AS for_sale_yaks,
  (SELECT COUNT(*)
   FROM yak_trade_ear_tag_inventory
   WHERE status = 'SOLD') AS sold_yaks,
  (SELECT COALESCE(SUM(total_capacity - current_count), 0)
   FROM yak_car_parking_zone
   WHERE status = 'NORMAL') AS remaining_parking,
  (SELECT COUNT(*)
   FROM (
     SELECT plate_no AS vehicle_no
     FROM yak_car_record
     WHERE del_flag = '0'
       AND entry_time >= CURRENT_DATE
     UNION
     SELECT vehicle_no
     FROM yak_trade_entry_record
     WHERE entered_at >= CURRENT_DATE
   ) v) AS entering_vehicles,
  (SELECT COUNT(*)
   FROM yak_sn_customer
   WHERE del_flag = '0'
     AND customer_type = 'SELLER') AS supplier_count
"""

var rows = db.select(sql)
var row = rows && rows.length > 0 ? rows[0] : null

if (!row) {
  return {
    totalSupply: 0,
    forSaleYaks: 0,
    soldYaks: 0,
    remainingParking: 0,
    enteringVehicles: 0,
    supplierCount: 0
  }
}

return {
  totalSupply: row.totalSupply ? row.totalSupply : 0,
  forSaleYaks: row.forSaleYaks ? row.forSaleYaks : 0,
  soldYaks: row.soldYaks ? row.soldYaks : 0,
  remainingParking: row.remainingParking ? row.remainingParking : 0,
  enteringVehicles: row.enteringVehicles ? row.enteringVehicles : 0,
  supplierCount: row.supplierCount ? row.supplierCount : 0
}