540 lines
20 KiB
JavaScript
540 lines
20 KiB
JavaScript
// University-wide directory: every catalog document parsed once and searched
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// by teacher, room and date. Answers come from the Word files only, so every
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// response carries its coverage and the caller must present it as such.
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import { catalogDiagnostics } from "./diagnostics.js";
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import { getCatalog, getCalendar } from "./source.js";
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import { scheduleFor } from "./schedules.js";
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import { PERSON, personName, roomKey, tokens, roomMoves } from "./rooms.js";
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import {
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semesterView,
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lessonDates,
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todayIso,
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weekday,
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weekIndexOf,
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} from "../shared/weeks.js";
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import { planFor as planForWeek } from "../shared/lessons.js";
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let index = null,
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building = null;
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const DATE = /\d{1,2}\.\d{1,2}(?:\.\d{2,4})?\.?/g;
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// Week lists inside a room note: "ауд.205;6,8н.-…", "1-9н.".
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const WEEKS = /\d{1,2}(?:\s*[-–,]\s*\d{1,2})+\s*н(?:ед)?\.?|\d{1,2}\s*н(?:ед)?\./giu;
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const MENTION = /(?:ауд\.?|(?<![А-Яа-яЁё])а\.)\s*([^\n(]{0,40})/giu;
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const HYPHEN_ROOM = /[А-ЯA-Z]\d-\d{2}/gu;
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export const normalize = (s) =>
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(s || "").toLowerCase().replace(/ё/g, "е").replace(/[\s.]/g, "");
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export { personName, roomKey };
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/** Ordinary numbered rooms only: "129", "207Г". Distance learning "200(ДО)" is not a free room. */
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export const isPhysicalRoom = (room) =>
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/^(\d{2,4}[А-ЯA-Z]{0,2}|\d{2,4}\/\d{2,4}|[А-ЯA-Z]\d-\d{2})$/.test(room) &&
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!/ДО$/.test(room);
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/**
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* Rooms in a cell or room field. Dates, week lists and dated moves are taken out
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* first so "ауд. 432 14.10. -ауд. 333" gives room 432 and a move to 333 on 14 October.
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* "200 (ДО)" is distance learning and occupies no room.
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*/
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export function parseRooms(text, year) {
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const moved = roomMoves((text || "").replace(/\u00a0/g, " "), year);
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const overrides = moved.moves;
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let rest = moved.rest;
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// "200 (ДО)" or "200ДО": distance learning.
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const distance = /\(\s*до\s*\)|\d\s*до(?![а-яё])/i.test(rest);
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rest = rest.replace(/\([^)]*\)?/g, " ").replace(DATE, " ").replace(WEEKS, " ");
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return {
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rooms: distance ? [] : [...new Set(tokens(rest).map(roomKey).filter((r) => !/ДО$/.test(r)))],
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overrides,
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distance,
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rest,
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};
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}
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/** Every teacher and room named in a cell, not only the first one the parser picked. */
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export function peopleAndRooms(lesson, year) {
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const teachers = new Set();
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if (lesson.teacher) teachers.add(personName(lesson.teacher));
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for (const m of (lesson.raw || "").matchAll(PERSON)) teachers.add(personName(m[0]));
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const cell = parseRooms(lesson.raw, year);
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const rooms = new Set();
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// Rooms written after "ауд." / "а." and the "А1-15" style anywhere in the cell.
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for (const m of cell.rest.matchAll(MENTION)) for (const t of tokens(m[1])) rooms.add(roomKey(t));
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for (const m of cell.rest.toUpperCase().matchAll(HYPHEN_ROOM)) rooms.add(roomKey(m[0]));
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// The parser's room field only counts when the cell really names that room
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// (it can pick "12" out of a date like "17.12" or "05" out of "В0-05").
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const field = parseRooms(lesson.room, year);
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const cleanCell = cell.rest.toUpperCase().replace(/\s+/g, "");
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for (const r of field.rooms)
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if (
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![...rooms].some((x) => x.endsWith(`-${r}`)) &&
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new RegExp(`(^|[^\\dА-ЯA-Z-])${r}(?![\\dА-Я])`, "u").test(cleanCell)
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)
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rooms.add(r);
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const overrides = [...cell.overrides, ...field.overrides].filter(
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(o, i, all) => all.findIndex((x) => x.date === o.date && x.room === o.room) === i,
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);
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// Rooms and teachers by week ("1-9н. 502н / с 10н. – 359"): all of them belong to the lesson.
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const plan = lesson.plan || [];
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for (const p of plan) {
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for (const r of p.rooms) rooms.add(r);
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for (const t of p.teachers) teachers.add(personName(t));
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}
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return {
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teachers: [...teachers],
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rooms: cell.distance || field.distance ? [] : [...rooms],
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overrides,
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plan,
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distance: cell.distance || field.distance,
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};
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}
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/** The lesson's plan entries for a week `{n, color}`: by its number, its colour or both. */
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const planFor = (entry, week) => planForWeek(entry.plan, week);
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/**
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* Rooms a lesson uses on a date: a dated move wins, then the room for that week ("1-9н. 502н",
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* "бел.н.504н/зел.н.524н"), then the lesson's rooms.
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*/
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export function roomsOn(entry, date, week = null) {
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const moved = entry.overrides.filter((o) => o.date === date).map((o) => o.room);
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if (moved.length) return moved;
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const planned = [...new Set(planFor(entry, week).flatMap((p) => p.rooms))];
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if (planned.length) return planned;
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// A week the plan does not name: not the rooms it names only for other weeks.
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if (week && entry.plan?.length) {
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const only = new Set(entry.plan.flatMap((p) => p.rooms));
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return entry.rooms.filter((r) => !only.has(r));
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}
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return entry.rooms;
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}
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/** Whether the lesson moves to another room on that date. */
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export const movedOn = (entry, date) => entry.overrides.some((o) => o.date === date);
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/** Teachers of a lesson in a week: "2-9н.-Клос О.Ю., 10-14н.-Конторов В.Э." names one each. */
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export function teachersOn(entry, week = null) {
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const planned = [...new Set(planFor(entry, week).flatMap((p) => p.teachers))];
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if (planned.length) return planned;
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if (week && entry.plan?.length) {
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const only = new Set(entry.plan.flatMap((p) => p.teachers));
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const usual = entry.teachers.filter((t) => !only.has(t));
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if (usual.length) return usual;
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}
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return entry.teachers;
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}
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/** The week a date falls in for an entry's document, `{n, color}` or null. */
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export function weekFor(entry, date, calendar, views = new Map()) {
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const key = `${entry.doc.id}|${date}`;
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if (!views.has(key)) views.set(key, semesterView(calendar, entry.doc.schedule, date));
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const view = views.get(key);
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return view ? view.weeks[weekIndexOf(view, date)] || null : null;
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}
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export function buildIndex(docs) {
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const entries = [];
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for (const doc of docs)
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for (const lesson of doc.schedule.lessons)
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entries.push({
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doc,
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lesson,
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...peopleAndRooms(lesson, doc.schedule.academicYear),
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});
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const teachers = new Map(),
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rooms = new Map();
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for (const e of entries) {
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for (const t of e.teachers) {
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const key = normalize(t),
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item = teachers.get(key) || { name: t, count: 0, faculties: new Set() };
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item.count++;
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if (e.doc.schedule.source.faculty) item.faculties.add(e.doc.schedule.source.faculty);
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teachers.set(key, item);
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}
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for (const r of [...e.rooms, ...e.overrides.map((o) => o.room)])
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rooms.set(r, (rooms.get(r) || 0) + 1);
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}
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return { entries, teachers, rooms };
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}
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async function build(catalog) {
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const docs = [],
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failed = [],
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queue = [...catalog.files];
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await Promise.all(
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Array.from({ length: 4 }, async () => {
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while (queue.length) {
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const file = queue.shift();
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try {
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docs.push({ id: file.id, file, schedule: await scheduleFor(file) });
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} catch (error) {
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failed.push({ id: file.id, name: file.name, error: error.message });
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}
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}
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}),
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);
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index = {
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catalogVersion: versionOf(catalog),
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year: catalog.year,
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builtAt: new Date().toISOString(),
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total: catalog.files.length,
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docs,
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failed,
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...buildIndex(docs),
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};
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return index;
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}
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// A catalog's documents and their dates; older cached catalogs have only the time of the crawl.
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const versionOf = (catalog) => catalog.version || catalog.updatedAt;
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function rebuild(catalog) {
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if (!building)
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building = build(catalog).finally(() => {
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building = null;
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});
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return building;
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}
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/**
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* The current index; rebuilt in the background when a document of the catalog changes. A check
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* that finds the catalog as it was keeps the index, so its ETags, and the clients' caches, hold.
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*/
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export async function getIndex() {
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const catalog = await getCatalog();
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if (!index || index.catalogVersion !== versionOf(catalog)) rebuild(catalog);
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if (!index) await building;
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return index;
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}
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/** The index of the catalog as it is now, waiting for the rebuild a change needs (the watcher). */
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export async function syncIndex(catalog) {
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if (!index || index.catalogVersion !== versionOf(catalog)) {
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if (building) await building;
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if (!index || index.catalogVersion !== versionOf(catalog)) await rebuild(catalog);
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}
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return index;
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}
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export const indexStatus = () =>
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index
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? {
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documents: index.docs.length,
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total: index.total,
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failed: index.failed.length,
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builtAt: index.builtAt,
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rebuilding: Boolean(building),
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// Cells that look misread, listed by /api/diagnostics.
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problems: catalogDiagnostics(index).problems,
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}
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: { documents: 0, rebuilding: Boolean(building) };
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const minutes = (t) => {
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const [h, m] = t.split(":").map(Number);
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return h * 60 + m;
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};
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/**
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* Whether a lesson takes place on a date: "yes", "no", "maybe" (the week mark
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* is unreadable) or "unknown" (the document's semester is not in the week table).
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*/
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export function occurrence(entry, date, calendar, views = new Map()) {
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const { lesson, doc } = entry;
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if (lesson.date) return lesson.date === date ? "yes" : "no";
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if (lesson.dates?.length) return lesson.dates.includes(date) ? "yes" : "no";
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if (lesson.day !== weekday(date)) return "no";
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const key = `${doc.id}|${date}`;
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if (!views.has(key)) views.set(key, semesterView(calendar, doc.schedule, date));
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const view = views.get(key);
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if (!view) return "unknown";
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const dates = lessonDates(lesson, view);
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if (dates) return dates.includes(date) ? "yes" : "no";
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const week = view.weeks[weekIndexOf(view, date)];
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if (week && lesson.variant !== "all" && (week.color === "white") !== (lesson.variant === "upper"))
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return "no";
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return week ? "maybe" : "no";
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}
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function coverage(idx, unknownDocs) {
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return {
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documents: idx.docs.length - unknownDocs.size,
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total: idx.total,
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failed: idx.failed.map((f) => f.name),
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withoutSemester: [...unknownDocs].map((id) => idx.docs.find((d) => d.id === id)?.file.name).filter(Boolean),
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year: idx.year,
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};
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}
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export function search(idx, query) {
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const q = normalize(query);
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if (q.length < 2) return { teachers: [], rooms: [] };
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const teachers = [...idx.teachers.entries()]
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.filter(([key]) => key.includes(q))
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.map(([, t]) => ({ name: t.name, count: t.count, faculties: [...t.faculties] }))
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.sort((a, b) => Number(!normalize(a.name).startsWith(q)) - Number(!normalize(b.name).startsWith(q)) || b.count - a.count)
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.slice(0, 20);
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const roomQuery = roomKey(query);
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const rooms = [...idx.rooms.entries()]
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.filter(([room]) => room.startsWith(roomQuery))
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.map(([room, count]) => ({ room, count }))
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.sort((a, b) => a.room.localeCompare(b.room, "ru", { numeric: true }))
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.slice(0, 20);
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return { teachers, rooms };
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}
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/** One teacher's or room's lessons on a date, merged across groups and documents. */
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export function dayOf(idx, calendar, { teacher, room }, date) {
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const views = new Map(),
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unknownDocs = new Set();
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const want = teacher ? normalize(teacher) : null,
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wantRoom = room ? roomKey(room) : null;
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const merged = new Map();
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for (const entry of idx.entries) {
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if (want && !entry.teachers.some((t) => normalize(t) === want)) continue;
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if (
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wantRoom &&
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!entry.rooms.includes(wantRoom) &&
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!entry.overrides.some((o) => o.room === wantRoom)
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)
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continue;
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const status = occurrence(entry, date, calendar, views);
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if (status === "unknown") unknownDocs.add(entry.doc.id);
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if (status !== "yes" && status !== "maybe") continue;
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const week = weekFor(entry, date, calendar, views);
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const rooms = roomsOn(entry, date, week);
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const teachers = teachersOn(entry, week);
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if (wantRoom && !rooms.includes(wantRoom)) continue;
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if (want && !teachers.some((t) => normalize(t) === want)) continue;
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const l = entry.lesson;
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const key = [l.start, normalize(l.subject), rooms.join(","), teachers.join(",")].join("|");
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const item = merged.get(key) || {
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start: l.start,
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end: l.end,
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subject: l.subject,
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type: l.type,
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teachers,
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rooms,
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moved: movedOn(entry, date),
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place: l.place || null,
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distance: entry.distance,
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groups: [],
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documents: [],
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condition: l.condition,
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uncertain: false,
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};
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for (const g of l.groups) if (!item.groups.includes(g)) item.groups.push(g);
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if (!item.documents.some((d) => d.id === entry.doc.id))
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item.documents.push({ id: entry.doc.id, name: entry.doc.file.name });
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if (status === "maybe") item.uncertain = true;
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merged.set(key, item);
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}
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return {
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date,
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lessons: [...merged.values()].sort((a, b) => a.start.localeCompare(b.start)),
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coverage: coverage(idx, unknownDocs),
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};
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}
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/** Rooms with no lesson overlapping a bell pair on a date, by the published schedules. */
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export function freeRooms(idx, calendar, date, pair) {
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const bell = calendar?.bells.find((b) => b.pair === pair);
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if (!bell) return null;
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const from = minutes(bell.start),
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to = minutes(bell.end);
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const views = new Map(),
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unknownDocs = new Set(),
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busy = new Map(),
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maybe = new Map();
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const endOf = (l) =>
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l.end ? minutes(l.end) : minutes(calendar.bells.find((b) => b.start === l.start)?.end || l.start) || minutes(l.start) + 80;
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for (const entry of idx.entries) {
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const rooms = roomsOn(entry, date, weekFor(entry, date, calendar, views)).filter(isPhysicalRoom);
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if (!rooms.length) continue;
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const l = entry.lesson,
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start = minutes(l.start),
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end = Math.max(endOf(l), start + 45);
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if (end <= from || start >= to) continue;
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const status = occurrence(entry, date, calendar, views);
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if (status === "unknown") unknownDocs.add(entry.doc.id);
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const target = status === "yes" ? busy : status === "maybe" ? maybe : null;
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if (!target) continue;
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for (const r of rooms)
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target.set(r, [...(target.get(r) || []), { subject: l.subject, groups: l.groups, condition: l.condition }]);
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}
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const all = [...idx.rooms.keys()].filter(isPhysicalRoom);
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const free = all.filter((r) => !busy.has(r) && !maybe.has(r)).sort((a, b) => a.localeCompare(b, "ru", { numeric: true }));
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const groups = new Map();
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for (const r of free) {
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const letter = r.match(/[А-ЯA-Z]+$/)?.[0] || r.match(/^[А-ЯA-Z]/)?.[0] || "";
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groups.set(letter, [...(groups.get(letter) || []), r]);
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}
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return {
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date,
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pair,
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bell,
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free: [...groups.entries()]
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.sort(([a], [b]) => (a === "" ? -1 : b === "" ? 1 : a.localeCompare(b, "ru")))
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.map(([letter, list]) => ({ letter, rooms: list })),
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freeCount: free.length,
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busyCount: busy.size,
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maybe: [...maybe.entries()].filter(([r]) => !busy.has(r)).map(([room, lessons]) => ({ room, lessons })),
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knownRooms: all.length,
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coverage: coverage(idx, unknownDocs),
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};
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}
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export async function directoryCalendar() {
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try {
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return await getCalendar();
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} catch {
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return null;
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}
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}
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export { todayIso };
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export const EXAM_TYPES = ["Экзамен", "Зачёт", "Консультация", "Защита курсовой работы"];
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/** The index as it is now, without waiting for a first build (which this starts). */
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export function readyIndex() {
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getIndex().catch(() => {});
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return index;
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}
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/**
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* Dated session events of a group (exams, credits, consultations, coursework defences) from
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* every catalog document except `exceptDocId`, as index entries, so a timetable can show the
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* group's credits even when the university publishes them in a separate "Расписание зачетов".
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*/
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export function sessionEntriesOf(idx, group, faculty, exceptDocId) {
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const seen = new Map();
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for (const entry of idx?.entries || []) {
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const { doc, lesson } = entry;
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if (doc.id === exceptDocId || !EXAM_TYPES.includes(lesson.type) || !lesson.groups.includes(group)) continue;
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if (!lesson.date && !lesson.dates?.length) continue;
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if (faculty && doc.schedule.source.faculty && doc.schedule.source.faculty !== faculty) continue;
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const subgroup = lesson.subgroups?.find((s) => s.group === group)?.label || "";
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const key = [lesson.date || lesson.dates.join(","), lesson.start, normalize(lesson.subject), lesson.type, subgroup].join("|");
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if (!seen.has(key)) seen.set(key, entry);
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}
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return [...seen.values()];
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}
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/** Dated exams, credits and consultations of a group across every document. */
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export function examsOf(idx, group, faculty) {
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const seen = new Map();
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for (const { doc, lesson, teachers, rooms } of idx.entries) {
|
||
if (!EXAM_TYPES.includes(lesson.type) || !lesson.groups.includes(group)) continue;
|
||
if (faculty && doc.schedule.source.faculty && doc.schedule.source.faculty !== faculty) continue;
|
||
const dates = lesson.date ? [lesson.date] : lesson.dates || [];
|
||
for (const date of dates) {
|
||
const key = [date, lesson.start, normalize(lesson.subject), lesson.type].join("|");
|
||
if (seen.has(key)) continue;
|
||
seen.set(key, {
|
||
date,
|
||
start: lesson.start,
|
||
end: lesson.end,
|
||
type: lesson.type,
|
||
subject: lesson.subject,
|
||
teachers,
|
||
rooms,
|
||
document: { id: doc.id, name: doc.file.name, period: doc.schedule.period },
|
||
});
|
||
}
|
||
}
|
||
return [...seen.values()].sort(
|
||
(a, b) => a.date.localeCompare(b.date) || a.start.localeCompare(b.start),
|
||
);
|
||
}
|
||
|
||
/** "23-БА", "23 ба" and "23ба" are the same group for searching. */
|
||
export const groupKey = (s) =>
|
||
(s || "").toLowerCase().replace(/ё/g, "е").replace(/[\s\-–_.]/g, "");
|
||
|
||
/**
|
||
* Documents that only add to a group's timetable: their credits, exams and consultations reach
|
||
* the student through the session countdown (/api/exams), so the group picker offers them only
|
||
* when the group has nothing else.
|
||
*/
|
||
const SUPPLEMENTS = new Set(["Зачёты", "Экзаменационная сессия"]);
|
||
|
||
/** The last date of a document whose every lesson is dated ("Введение в высшее образование"), else null. */
|
||
function lastDate(schedule) {
|
||
const dates = schedule.lessons.flatMap((l) => (l.date ? [l.date] : l.dates || []));
|
||
return dates.length && schedule.lessons.every((l) => l.date || l.dates?.length)
|
||
? dates.sort().at(-1)
|
||
: null;
|
||
}
|
||
|
||
/**
|
||
* Every group of every document, with the catalog place it came from. A group with a main
|
||
* timetable is not offered its supplements, nor dated documents that are already over.
|
||
*/
|
||
export function groupEntries(idx, today = todayIso()) {
|
||
const list = [];
|
||
for (const { file, schedule } of idx.docs)
|
||
for (const group of schedule.groups)
|
||
list.push({
|
||
group,
|
||
key: groupKey(group),
|
||
fileId: file.id,
|
||
file: file.name,
|
||
faculty: file.faculty || schedule.source.faculty || "",
|
||
course: file.course || schedule.source.course || "",
|
||
form: file.form || "",
|
||
period: schedule.period || "",
|
||
modified: file.modified || null,
|
||
over: (lastDate(schedule) ?? "9999") < today,
|
||
});
|
||
const secondary = (e) => SUPPLEMENTS.has(e.period) || e.over;
|
||
const main = new Set(list.filter((e) => !secondary(e)).map((e) => e.key));
|
||
return list.filter((e) => !secondary(e) || !main.has(e.key)).map(({ over, ...e }) => e);
|
||
}
|
||
|
||
const count = (items, pick) => {
|
||
const map = new Map();
|
||
for (const item of items) {
|
||
const value = pick(item);
|
||
if (value) map.set(value, (map.get(value) || 0) + 1);
|
||
}
|
||
return [...map.entries()]
|
||
.map(([name, n]) => ({ name, count: n }))
|
||
.sort((a, b) => a.name.localeCompare(b.name, "ru", { numeric: true }));
|
||
};
|
||
|
||
/**
|
||
* Groups matching a query and/or catalog filters. The query ignores filters on
|
||
* purpose: a student typing their group must find it in any faculty.
|
||
*/
|
||
export function findGroups(idx, { q = "", faculty = "", course = "", form = "", today } = {}) {
|
||
const all = groupEntries(idx, today);
|
||
const key = groupKey(q);
|
||
let results;
|
||
if (key.length >= 2) {
|
||
const rank = (e) => (e.key === key ? 0 : e.key.startsWith(key) ? 1 : 2);
|
||
results = all
|
||
.filter((e) => e.key.includes(key))
|
||
.sort(
|
||
(a, b) =>
|
||
rank(a) - rank(b) ||
|
||
a.group.localeCompare(b.group, "ru", { numeric: true }) ||
|
||
a.period.localeCompare(b.period, "ru"),
|
||
)
|
||
.slice(0, 50);
|
||
} else if (faculty || course || form) {
|
||
results = all
|
||
.filter(
|
||
(e) =>
|
||
(!faculty || e.faculty === faculty) &&
|
||
(!course || e.course === course) &&
|
||
(!form || e.form === form),
|
||
)
|
||
.sort((a, b) => a.group.localeCompare(b.group, "ru", { numeric: true }))
|
||
.slice(0, 300);
|
||
} else results = [];
|
||
const inFaculty = all.filter((e) => !faculty || e.faculty === faculty);
|
||
return {
|
||
results,
|
||
facets: {
|
||
faculties: count(all, (e) => e.faculty),
|
||
courses: count(inFaculty, (e) => e.course),
|
||
forms: count(inFaculty, (e) => e.form),
|
||
},
|
||
total: all.length,
|
||
year: idx.year,
|
||
};
|
||
}
|