Implement create custom recommendations

tests/unit/createFlowMethodsRoute.test.ts

@@ -0,0 +1,69 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const findManyMock = vi.fn();
+
+vi.mock("../../lib/server/env", () => ({
+  isDatabaseConfigured: () => true,
+}));
+
+vi.mock("../../lib/server/db", () => ({
+  prisma: {
+    methodFacet: {
+      findMany: (...args: unknown[]) => findManyMock(...args),
+    },
+  },
+}));
+
+import { GET } from "../../app/api/create-flow/methods/route";
+
+function makeReq(url: string) {
+  return { nextUrl: new URL(url) } as unknown as Parameters<typeof GET>[0];
+}
+
+beforeEach(() => {
+  findManyMock.mockReset();
+});
+
+describe("GET /api/create-flow/methods", () => {
+  it("400s on missing or unknown section", async () => {
+    const r1 = await GET(makeReq("https://x.test/api/create-flow/methods"));
+    expect(r1.status).toBe(400);
+    const r2 = await GET(
+      makeReq("https://x.test/api/create-flow/methods?section=foo"),
+    );
+    expect(r2.status).toBe(400);
+  });
+
+  it("returns ranked methods from the facet query", async () => {
+    findManyMock.mockResolvedValueOnce([
+      { slug: "loomio", group: "size", value: "twoToFive" },
+      { slug: "loomio", group: "orgType", value: "workersCoop" },
+      { slug: "in-person", group: "size", value: "twoToFive" },
+    ]);
+    const res = await GET(
+      makeReq(
+        "https://x.test/api/create-flow/methods?section=communication&facet.size=twoToFive&facet.orgType=workersCoop",
+      ),
+    );
+    expect(res.status).toBe(200);
+    const json = (await res.json()) as {
+      section: string;
+      methods: { slug: string; matches: { score: number } }[];
+    };
+    expect(json.section).toBe("communication");
+    expect(json.methods.map((m) => m.slug)).toEqual(["loomio", "in-person"]);
+    expect(json.methods[0].matches.score).toBe(2);
+  });
+
+  it("returns empty methods when the DB query throws (caller falls back)", async () => {
+    findManyMock.mockRejectedValueOnce(new Error("db down"));
+    const res = await GET(
+      makeReq(
+        "https://x.test/api/create-flow/methods?section=communication&facet.size=oneMember",
+      ),
+    );
+    expect(res.status).toBe(200);
+    const json = (await res.json()) as { methods: unknown[] };
+    expect(json.methods).toEqual([]);
+  });
+});