const router = require('koa-router')()
const ArticleDao = require('../dao/ArticleDao')
const ArticleEntity = require('../entity/ArticleEntity')
const UserDao = require('../dao/UserDao')

router.prefix('/articles')

router.get('/:id', async (ctx) => {
    let id = ctx.params.id
    let result = await ArticleDao.selectByID(id)
    ctx.body = result
})

router.post('/', async (ctx) => {
    console.log(ctx.request.body);
    article = ctx.request.body
    article['authorID'] = 1
    result = await ArticleDao.insert(article)
    console.log(result);
    ctx.body = result
})

router.get('/', async (ctx) => {
    let result = await ArticleDao.selectLatest(0, 20)
    result = JSON.parse(JSON.stringify(result))
    let articles = []
    let pros = [] // 存放Promise对象

    result.map(item => {
        let authorID = item.author_id
        pros.push(UserDao.selectById(authorID))
    })

    let result2 = await Promise.all(pros) // Promise.all() 完成所有promise后返回结果集
    let count = 0
    result.map(item => {
        user = JSON.parse(JSON.stringify(result2[count]))[0]
        let stuff = {
            ...item,
            author: {
                name: user.user_name,
                avatar: user.avatar
            }
        }
        articles.push(stuff)
        count += 1
    })
    ctx.body = articles
})

module.exports = router