feat: add asset variants endpoint

apps/web/app/api/assets/[id]/variants/route.ts

@@ -0,0 +1,43 @@
+import { z } from "zod";
+
+import { getDb } from "@tline/db";
+
+import { shapeVariants } from "./shape";
+
+export const runtime = "nodejs";
+
+const paramsSchema = z.object({
+  id: z.string().uuid(),
+});
+
+export async function GET(
+  _request: Request,
+  context: { params: Promise<{ id: string }> },
+): Promise<Response> {
+  const rawParams = await context.params;
+  const paramsParsed = paramsSchema.safeParse(rawParams);
+  if (!paramsParsed.success) {
+    return Response.json(
+      { error: "invalid_params", issues: paramsParsed.error.issues },
+      { status: 400 },
+    );
+  }
+
+  const db = getDb();
+  const rows = await db<
+    {
+      kind: string;
+      size: number;
+      key: string;
+      mime_type: string;
+      width: number | null;
+      height: number | null;
+    }[]
+  >`
+    select kind, size, key, mime_type, width, height
+    from asset_variants
+    where asset_id = ${paramsParsed.data.id}
+  `;
+
+  return Response.json(shapeVariants(rows));
+}

apps/web/app/api/assets/[id]/variants/shape.ts

@@ -0,0 +1,19 @@
+type VariantRow = {
+  kind: string;
+  size: number;
+  key: string;
+};
+
+type VariantShape = {
+  kind: string;
+  size: number;
+  key: string;
+};
+
+export function shapeVariants(rows: VariantRow[]): VariantShape[] {
+  return rows.map((row) => ({
+    kind: row.kind,
+    size: row.size,
+    key: row.key,
+  }));
+}

apps/web/src/__tests__/variants-route.test.ts

@@ -0,0 +1,13 @@
+import { test, expect } from "bun:test";
+
+test("variants route returns only kind/size/key fields", async () => {
+  const { shapeVariants } = await import(
+    "../../app/api/assets/[id]/variants/shape",
+  );
+  const rows = [
+    { kind: "video_mp4", size: 720, key: "derived/video/a.mp4", mime_type: "video/mp4" },
+  ];
+  expect(shapeVariants(rows)).toEqual([
+    { kind: "video_mp4", size: 720, key: "derived/video/a.mp4" },
+  ]);
+});