routes.js

/* routes.js */

import { Router } from 'https://deno.land/x/oak@v6.5.1/mod.ts'
import { Handlebars } from 'https://deno.land/x/handlebars/mod.ts'
// import { upload } from 'https://cdn.deno.land/oak_upload_middleware/versions/v2/raw/mod.ts'
// import { parse } from 'https://deno.land/std/flags/mod.ts'

import { login, register } from './modules/accounts.js'
import { createCommodity, getCommodities, getCommodityById, deleteCommodityById, offerToCommodity, getOffersByUserId, acceptOffer, confirmOffer } from './modules/commodities.js'
import { saveFile, parseQueryString, transformCommodity } from './util.js'

const handle = new Handlebars({ defaultLayout: '' })

const router = new Router()

// the routes defined here
router.get('/', async context => {
	const authorised = context.cookies.get('authorised')
	const username = context.cookies.get('username')
	// judge isSeller when username exist
	const isSeller = username && username.startsWith("artist")
	const commodities = await getCommodities(authorised, isSeller)
	console.log('@@@@@',commodities)
	const data = { authorised, username, isSeller, commodities }
	// const result = await getOffersByUserId(authorised, isSeller)
	const body = await handle.renderView('foo', data)
	context.response.body = body
})
//Login 
router.get('/login', async context => {
	const body = await handle.renderView('login')
	context.response.body = body
})
//register
router.get('/register', async context => {
	const body = await handle.renderView('register')
	context.response.body = body
})

// handle register request
router.post('/register', async context => {
	console.log('POST /register')
	const body = context.request.body({ type: 'form' })
	const value = await body.value
	const obj = Object.fromEntries(value)
	console.log(obj)
	await register(obj)
	context.response.redirect('/login')
})

// handle logout request
router.get('/logout', context => {
  // context.cookies.set('authorised', null) // this does the same
//   clear cookies
  context.cookies.delete('authorised')
  context.cookies.delete('username')
  context.response.redirect('/')
})

// handle login request
router.post('/login', async context => {
	const body = context.request.body({ type: 'form' })
	const value = await body.value
	const obj = Object.fromEntries(value)
	console.log(obj)
	try {
		const {id, user} = await login(obj)
        // save user id and username in cookie after login successfully
		context.cookies.set('authorised', id)
		context.cookies.set('username', user)
        // redirect to home page
		context.response.redirect('/')
	} catch(err) {
		console.log(err)
		context.response.redirect('/login')
	}
})
// render and return the create commodity page
router.get('/create', async context => {
	const authorised = context.cookies.get('authorised')
	if(authorised === undefined) context.response.redirect('/')
	const data = { authorised }
	const body = await handle.renderView('create', data)
	context.response.body = body
})
// handle create commodity request
router.post('/createCommodity', async context => {
	const authorised = context.cookies.get('authorised')
	if(authorised === undefined) context.response.redirect('/')
	try {
		const body  = await context.request.body()
		const data = await body.value
        const { picture, ...rest } = data
        const { base64 } = picture
		const userId = authorised
        // save picture to specific path
		const picturePath = saveFile(base64, userId)
        // create commodity, picture path is also stored in database
        const { affectedRows } = await createCommodity({
            ...rest,
            picturePath,
            userId
        })
		const message = affectedRows === 1 ? 'create commodities successfully...' : 'create commodities failed...'
		context.response.status = 201
		context.response.body = JSON.stringify(
			{
				data: {
					message
				}
			}
		)
	} catch(err) {
		context.response.status = 400
		context.response.body = JSON.stringify(
			{
				errors: [
					{
						title: 'a problem occurred',
						detail: err.message
					}
				]
			}
		)
	}
})
// get commodity list
router.get('/getCommodities', async context => {
	context.response.body = await getCommodities()
})
// get the detail of commodity
router.get('/commodity/detail', async context => {
	const authorised = context.cookies.get('authorised')
	const username = context.cookies.get('username')
	const isSeller = username.startsWith("artist")
	// context.request.url.search can get query string from such as '?id=1'，parseQueryString is a function to parse it into an object
	const {id, buyerId} = parseQueryString(context.request.url.search)
	const {commodity, offer} = await getCommodityById(id, buyerId)
	// transform commodity because the detail page only need to show the created date of the commodity but not the create time
	const result = transformCommodity(commodity)
	console.log(commodity)
	const body = await handle.renderView('detail', {
		authorised,
		username,
		commodity: result,
		offer,
		isSeller
	})
	context.response.body = body
})
//Delete commodity
router.get('/commodity/delete', async context => {
	// context.request.url.search can get query string from such as '?id=1'，parseQueryString is a function to parse it into an object
	const {id} = parseQueryString(context.request.url.search)
	const result = await deleteCommodityById(id)
	console.log(result)
	const commodities = await getCommodities()
	const body = await handle.renderView('foo', {commodities})
	context.response.body = body
})
//offer
router.post("/offer", async context => {
	const body  = await context.request.body()
	const {fields:{buyerId, bid, commodityId}} = await body.value.read()
	const affectedRows = await offerToCommodity({
		commodityId,
		buyerId,
		bid
	})
	context.response.redirect(`/commodity/detail?id=${commodityId}&buyerId=${buyerId}`)
})
//Accept offer
router.get('/acceptOffer', async context => {
	// context.request.url.search can get query string from such as '?id=1'，parseQueryString is a function to parse it into an object
	const {id, buyerId, offerId} = parseQueryString(context.request.url.search)
	const result = await acceptOffer(id, offerId)
	context.response.redirect(`/commodity/detail?id=${id}&buyerId=${buyerId}`)
})
//confirm offer
router.get('/confirmOffer', async context => {
	// context.request.url.search can get query string from such as '?id=1'，parseQueryString is a function to parse it into an object
	const {id, buyerId} = parseQueryString(context.request.url.search)
	const result = await confirmOffer(id)
	context.response.redirect(`/commodity/detail?id=${id}&buyerId=${buyerId}`)
})


export default router