push

pushy

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

scripts/backfill-durations.js

@@ -0,0 +1,42 @@
+/**
+ * One-time backfill: recompute duration_seconds for every lesson
+ * that has at least one saved page block.
+ *
+ * Run from the project root:
+ *   node scripts/backfill-durations.js
+ */
+
+const path = require('path');
+require('dotenv').config({ path: path.join(__dirname, '../.env') });
+
+const sequelize = require('../config/db.config');
+const LessonPage = require('../models/courses/lesson_page.mdl');
+const { recomputeDurations } = require('../utils/duration.util');
+
+(async () => {
+  await sequelize.authenticate();
+  console.log('DB connected.\n');
+
+  const pages = await LessonPage.findAll({
+    attributes: ['lesson_id', 'blocks'],
+    where: sequelize.literal(`jsonb_array_length(blocks::jsonb) > 0`),
+  });
+
+  console.log(`Found ${pages.length} lessons with blocks. Recomputing...`);
+
+  let ok = 0, fail = 0;
+  for (const page of pages) {
+    try {
+      await recomputeDurations(page.lesson_id);
+      process.stdout.write('.');
+      ok++;
+    } catch (err) {
+      process.stdout.write('✗');
+      console.error(`\n  lesson ${page.lesson_id}: ${err.message}`);
+      fail++;
+    }
+  }
+
+  console.log(`\n\nDone — ${ok} recomputed, ${fail} failed.`);
+  await sequelize.close();
+})();