'use strict';

const Service = require('egg').Service;

class CacheService extends Service {

  async setString(key, value, seconds) {

    let {redis} = this.app;
    if( !seconds ) return await redis.set(key,value);

    return await redis.set(key,value,'EX',seconds);
  }
  async getString( key ) {
    let {redis} = this.app;
    return await redis.get(key);
  }


  async setJSON(key,value,seconds) {
    let {redis} = this.app;
    value = JSON.stringify(value);
    if(!seconds) return  await redis.set(key,value);
    
    return  await redis.set(key,value,'EX',seconds);
  }

  async getJSON(key){

    let {redis} = this.app;
    let data = await redis.get(key);
    if( !data ) return;
    return JSON.parse(data);
  }

  async removeCache(key) {
    let {redis} = this.app;
    let ret = await redis.del( key );
    console.log("removeCache-> " + key, ret);
  }
}

module.exports = CacheService;