From 0679aa013f527b6878f197a0c90336b13076de1f Mon Sep 17 00:00:00 2001
From: beo3000 <pakabu@web.de>
Date: Wed, 6 May 2026 21:08:08 +0200
Subject: [PATCH] feat(scripts): add backfill-series-id script for jour-fixe
 agendas

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 scripts/backfill-series-id.js           | 55 +++++++++++++++++++++++++
 scripts/test/backfill-series-id.test.js | 27 ++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 scripts/backfill-series-id.js
 create mode 100644 scripts/test/backfill-series-id.test.js

diff --git a/scripts/backfill-series-id.js b/scripts/backfill-series-id.js
new file mode 100644
index 0000000..a3cd684
--- /dev/null
+++ b/scripts/backfill-series-id.js
@@ -0,0 +1,55 @@
+// scripts/backfill-series-id.js
+const { readFileSync, writeFileSync } = require('node:fs');
+const { resolve } = require('node:path');
+const { getCalendarEvents } = require('./lib/o365-calendar.js');
+
+function upsertFrontmatterField(md, key, value) {
+  const fmMatch = md.match(/^---\n([\s\S]*?)\n---/);
+  if (!fmMatch) return md;
+  const fm = fmMatch[1];
+  const lineRegex = new RegExp(`^${key}:.*$`, 'm');
+  let newFm;
+  if (lineRegex.test(fm)) {
+    newFm = fm.replace(lineRegex, `${key}: ${value}`);
+  } else {
+    newFm = `${fm}\n${key}: ${value}`;
+  }
+  return md.replace(/^---\n[\s\S]*?\n---/, `---\n${newFm}\n---`);
+}
+
+async function backfill(agendaPath, titleRegex, daysAhead = 30) {
+  const events = await getCalendarEvents(daysAhead);
+  const re = new RegExp(titleRegex, 'i');
+  const match = events.find(e => re.test(e.title) && e.isRecurring);
+  if (!match) {
+    throw new Error(`no recurring event matching /${titleRegex}/ in next ${daysAhead} days`);
+  }
+  // Need raw seriesMasterId — re-fetch single event by id (parseEventToMeeting drops it)
+  const { getEventById } = require('./lib/o365-calendar.js');
+  const raw = await getEventById(match.id);
+  const seriesId = raw.seriesMasterId;
+  if (!seriesId) {
+    throw new Error(`event ${match.id} has no seriesMasterId`);
+  }
+  const md = readFileSync(agendaPath, 'utf-8');
+  const updated = upsertFrontmatterField(md, 'o365_series_id', seriesId);
+  writeFileSync(agendaPath, updated, 'utf-8');
+  return seriesId;
+}
+
+async function main() {
+  const args = process.argv.slice(2);
+  if (args.length < 2) {
+    console.error('Usage: node backfill-series-id.js <agenda-path> <title-regex>');
+    process.exit(2);
+  }
+  const [agendaPath, titleRegex] = args;
+  const id = await backfill(resolve(agendaPath), titleRegex);
+  console.log(`set o365_series_id=${id} in ${agendaPath}`);
+}
+
+if (require.main === module) {
+  main().catch(e => { console.error(e.stack || e.message); process.exit(1); });
+}
+
+module.exports = { upsertFrontmatterField, backfill };
diff --git a/scripts/test/backfill-series-id.test.js b/scripts/test/backfill-series-id.test.js
new file mode 100644
index 0000000..dceecc8
--- /dev/null
+++ b/scripts/test/backfill-series-id.test.js
@@ -0,0 +1,27 @@
+// scripts/test/backfill-series-id.test.js
+const { describe, it } = require('node:test');
+const assert = require('node:assert/strict');
+const { upsertFrontmatterField } = require('../backfill-series-id.js');
+
+describe('upsertFrontmatterField', () => {
+  it('inserts new field when missing', () => {
+    const md = `---\ntags: [jour-fixe]\nserie: IT Team\nrhythmus: wöchentlich\n---\n\n# Agenda\n`;
+    const out = upsertFrontmatterField(md, 'o365_series_id', 'AAMkSeries123');
+    assert.ok(out.includes('o365_series_id: AAMkSeries123'));
+    assert.ok(out.includes('serie: IT Team'));
+    assert.ok(out.endsWith('# Agenda\n'));
+  });
+
+  it('replaces existing field value', () => {
+    const md = `---\nserie: X\no365_series_id: OLD\n---\n\nbody\n`;
+    const out = upsertFrontmatterField(md, 'o365_series_id', 'NEW');
+    assert.ok(out.includes('o365_series_id: NEW'));
+    assert.ok(!out.includes('OLD'));
+  });
+
+  it('returns content unchanged when no frontmatter present', () => {
+    const md = `# No frontmatter\n`;
+    const out = upsertFrontmatterField(md, 'o365_series_id', 'X');
+    assert.equal(out, md);
+  });
+});