const Service = require("egg").Service

class DbService extends Service {
  async addOrUpdate(table, form) {
    let result
    if (!form.id) {//创建
      result = await this.app.mysql.insert(table, form)
    } else {//更新
      result = await this.app.mysql.update(table, form)
    }
    return result === 1
  }

  async delete(table, id) {
    await this.app.mysql.delete(table, {id})
  }

  async detail(table, id) {
    return await this.app.mysql.get(table, {id})
  }

  async list(table, params = {}) {
    return await this.app.mysql.select(table, {
      where: params,
      limit: params?.size || 10, // 返回数据量
      offset: Math.max(params?.current - 1, 0), // 数据偏移量
    })
  }
}

module.exports = DbService