课表 API

// This week's lessons of one group, checked against the bell schedule.
const API = process.env.VISH_API ?? 'https://d1.vish-app.ru/api/v1'
const GROUP = process.env.VISH_GROUP ?? 'ШАД-111'

const get = async (path, params = {}) => {
	const url = new URL(`${API}${path}`)
	for (const [name, value] of Object.entries(params)) url.searchParams.set(name, String(value))
	const response = await fetch(url)
	if (!response.ok) throw new Error(`${url}: HTTP ${response.status}`)
	return response.json()
}

// Monday to Sunday of the current week, on the Moscow calendar.
const moscowToday = new Date(Date.now() + 3 * 60 * 60 * 1000)
const monday = new Date(moscowToday)
monday.setUTCDate(moscowToday.getUTCDate() - ((moscowToday.getUTCDay() + 6) % 7))
const sunday = new Date(monday)
sunday.setUTCDate(monday.getUTCDate() + 6)
const day = (date) => date.toISOString().slice(0, 10)

const config = await get('/app-config')
const slots = new Map(config.schedule.lessonSlots.map((slot) => [slot.number, slot]))
const week = await get('/schedule', { group: GROUP, dateFrom: day(monday), dateTo: day(sunday), all: 1 })
if (week.group?.name !== GROUP) throw new Error(`group ${GROUP} not found`)

console.log(`${GROUP}, week ${config.currentWeek.number} (parity ${config.currentWeek.parity}): ${week.list.length} lessons`)
for (const lesson of week.list) {
	// Wall-clock Moscow time in a UTC field: read the digits as they are.
	const start = lesson.startAt.slice(11, 16)
	const slot = slots.get(lesson.number)
	if (slot && slot.startTime !== start) throw new Error(`lesson ${lesson.id} starts ${start}, pair ${lesson.number} at ${slot.startTime}`)
	const cancelled = lesson.status === 'cancelled' ? ' (cancelled)' : ''
	console.log(`${lesson.date.slice(0, 10)} ${start} ${lesson.subject.ru} — ${lesson.room ?? 'no room'}${cancelled}`)
}