feat: improve learning and platform operations

server/src/routes/courses.ts

@@ -100,6 +100,29 @@ export const courseRoutes: FastifyPluginAsync = async (app) => {
     return { data: authenticated ? result.rows : result.rows.map(withoutProtectedMedia) };
   });
 
+  app.get('/me/learning', { preHandler: app.authenticate }, async (request) => {
+    const result = await pool.query(
+      `select base.*, coalesce(progress.progress, 0)::int as progress, progress."lastActivity"
+       from (
+         ${courseSelect()}
+         where c.status = 'published'
+       ) base
+       left join lateral (
+         select
+           case when count(l.id) = 0 then 0
+                else floor(100.0 * count(l.id) filter (where lp.completed_at is not null) / count(l.id))::int end as progress,
+           max(lp.updated_at) as "lastActivity"
+         from lessons l
+         left join lesson_progress lp on lp.lesson_id = l.id and lp.user_id = $1
+         where l.course_id = base.id
+       ) progress on true
+       where progress."lastActivity" is not null
+       order by progress."lastActivity" desc`,
+      [request.user.id],
+    );
+    return { data: result.rows };
+  });
+
   app.get('/:courseId', async (request, reply) => {
     const authenticated = await hasSession(request);
     const { courseId } = paramsSchema.parse(request.params);