v3: added comment likes, added votes/likes list view, added db migrations mechanism, updated project dependencies

api/sql/migrate.ts

@@ -0,0 +1,43 @@
+import type { DatabaseSync } from "node:sqlite";
+import { up as up0001CommentLikes } from "./migrations/0001_comment_likes.ts";
+
+interface Migration {
+  name: string;
+  up: (db: DatabaseSync) => void;
+}
+
+// Append-only — never edit or reorder a migration once it has shipped.
+// Each `up` must be idempotent: it also runs against fresh databases created
+// straight from schema.sql, where the change it makes already exists.
+const MIGRATIONS: Migration[] = [
+  { name: "0001_comment_likes", up: up0001CommentLikes },
+];
+
+export function runMigrations(db: DatabaseSync): void {
+  db.exec(`CREATE TABLE IF NOT EXISTS schema_migrations (
+    name       TEXT PRIMARY KEY,
+    applied_at TEXT NOT NULL
+  );`);
+
+  const applied = new Set(
+    (db.prepare(`SELECT name FROM schema_migrations;`).all() as {
+      name: string;
+    }[]).map((r) => r.name),
+  );
+
+  for (const { name, up } of MIGRATIONS) {
+    if (applied.has(name)) continue;
+    db.exec("BEGIN;");
+    try {
+      up(db);
+      db.prepare(
+        `INSERT INTO schema_migrations (name, applied_at) VALUES (?, ?);`,
+      ).run(name, new Date().toISOString());
+      db.exec("COMMIT;");
+      console.log(`[migrate] applied ${name}`);
+    } catch (err) {
+      db.exec("ROLLBACK;");
+      throw err;
+    }
+  }
+}