tools: preserve HTML deck exporter

2026-08-31 15:59:51 +02:00
parent e82fe8d322
commit 218e50f124
5 changed files with 501 additions and 0 deletions
@@ -0,0 +1,69 @@
+#!/usr/bin/env node
+// Assemble rendered slide PNGs into a 16:9 PPTX: one full-bleed image per slide,
+// native speaker notes, document metadata.
+//
+// Usage:
+//   node build.mjs <pngdir> <out.pptx> [--notes notes.json] [--title T] [--author A] [--subject S]
+import { createRequire } from 'node:module';
+import { existsSync, readdirSync, readFileSync } from 'node:fs';
+import path from 'node:path';
+
+const require = createRequire(import.meta.url);
+const PptxGenJS = require('pptxgenjs');
+
+const args = process.argv.slice(2);
+if (!args[0] || !args[1]) {
+  console.error(
+    'usage: node build.mjs <pngdir> <out.pptx> [--notes notes.json] [--title T] [--author A] [--subject S]',
+  );
+  process.exit(1);
+}
+
+const invocationDir = process.env.INIT_CWD || process.cwd();
+const dir = path.resolve(invocationDir, args[0]);
+const out = path.resolve(invocationDir, args[1]);
+const opt = (flag, fallback) => {
+  const index = args.indexOf(flag);
+  return index >= 0 ? args[index + 1] : fallback;
+};
+
+const presentation = new PptxGenJS();
+presentation.layout = 'LAYOUT_WIDE'; // 13.333 x 7.5 in
+presentation.title = opt('--title', path.basename(out, '.pptx'));
+presentation.author = opt('--author', 'ThothII');
+presentation.subject = opt('--subject', '');
+
+const notesOption = opt('--notes', null);
+const notesPath = notesOption
+  ? path.resolve(invocationDir, notesOption)
+  : path.join(dir, 'notes.json');
+const notes = existsSync(notesPath)
+  ? JSON.parse(readFileSync(notesPath, 'utf8'))
+  : {};
+
+const pngs = readdirSync(dir)
+  .filter(file => /^\d+\.png$/.test(file))
+  .sort((left, right) => Number.parseInt(left, 10) - Number.parseInt(right, 10));
+if (pngs.length === 0) {
+  console.error('no NN.png files in ' + dir);
+  process.exit(1);
+}
+
+for (const file of pngs) {
+  const slideNumber = Number.parseInt(file, 10);
+  const slide = presentation.addSlide();
+  slide.background = { color: 'FCFAFA' };
+  slide.addImage({
+    path: path.join(dir, file),
+    x: 0,
+    y: 0,
+    w: 13.333,
+    h: 7.5,
+  });
+  if (notes[slideNumber]) {
+    slide.addNotes(notes[slideNumber]);
+  }
+}
+
+await presentation.writeFile({ fileName: out });
+console.log('built', out, '-', pngs.length, 'slides');