feat: enhance lesson plan handling with new parser and color-coded room assignments

server/schedules.js

@@ -4,6 +4,8 @@ import { request, MIN_REFRESH } from "./source.js";
 import { DATA } from "./paths.js";
 
 const data = DATA + "parsed/";
+// The downloaded Word files: a new parser reads them again without asking the university.
+const originals = DATA + "documents/";
 // When each document was last downloaded, and the downloads under way: a forced refresh
 // downloads a document at most once per MIN_REFRESH, and simultaneous ones share a download.
 const fetchedAt = new Map(),
@@ -16,11 +18,12 @@ export async function scheduleFor(file, { refresh = false } = {}) {
   if (!refresh)
     try {
       const cached = JSON.parse(await readFile(cache, "utf8"));
-      if (
-        cached.schemaVersion === PARSER_VERSION &&
-        cached.source.modified === file.modified
-      )
-        return cached;
+      if (cached.source.modified === file.modified) {
+        if (cached.schemaVersion === PARSER_VERSION) return cached;
+        // The same file read by an older parser: parse the saved copy again.
+        const saved = await readFile(originals + file.id).catch(() => null);
+        if (saved) return parse(file, saved, cache);
+      }
     } catch {}
   if (!loading.has(file.id))
     loading.set(
@@ -33,6 +36,12 @@ export async function scheduleFor(file, { refresh = false } = {}) {
 async function download(file, cache) {
   const buffer = await request(file.path);
   fetchedAt.set(file.id, Date.now());
+  await mkdir(originals, { recursive: true });
+  await writeFile(originals + file.id, buffer);
+  return parse(file, buffer, cache);
+}
+
+async function parse(file, buffer, cache) {
   const parsed = await parseWord(buffer, {
     name: file.name,
     url: file.url,