feat(ai): Vercel AI SDK provider factory with BYOK and per-use-case model prefs

Provider factory (OpenAI/Anthropic/OpenRouter/Ollama). generateObject for all outputs. Features: recipe generation, photo-to-recipe vision, variations, drink/meal pairings, ingredient substitution, recipe adaptation, nutrition analysis, URL import, meal plan gen. User BYOK keys (AES-256-GCM). Per-use-case model preferences (text/vision/mealPlan). Site-level key override via admin settings.
2026-07-01 08:10:19 +02:00
parent 84d6cfeb07
commit d9d58fd01a
26 changed files with 1656 additions and 0 deletions
@@ -0,0 +1,56 @@
+import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
+import { and, eq } from "@epicure/db";
+import { db, recipes } from "@epicure/db";
+import { requireSession } from "@/lib/api-auth";
+import { checkTierLimit, incrementUsage } from "@/lib/tiers";
+import { suggestPairings } from "@/lib/ai/features/suggest-pairings";
+import { withUserKey } from "@/lib/ai/resolve-user-key";
+
+const Schema = z.object({
+  count: z.number().int().min(1).max(6).default(4),
+  provider: z.enum(["openai", "anthropic", "openrouter", "ollama"]).optional(),
+  model: z.string().optional(),
+});
+
+type Params = { params: Promise<{ id: string }> };
+
+export async function POST(req: NextRequest, { params }: Params) {
+  const { session, response } = await requireSession();
+  if (response) return response;
+
+  const { id } = await params;
+
+  // Allow pairings for own recipes or public recipes
+  const recipe = await db.query.recipes.findFirst({
+    where: and(eq(recipes.id, id)),
+    with: { ingredients: true },
+  });
+  if (!recipe || (recipe.visibility === "private" && recipe.authorId !== session!.user.id)) {
+    return NextResponse.json({ error: "Not found" }, { status: 404 });
+  }
+
+  const body = await req.json() as unknown;
+  const parsed = Schema.safeParse(body ?? {});
+  if (!parsed.success) return NextResponse.json({ error: "Validation error" }, { status: 400 });
+
+  await checkTierLimit(session!.user.id, session!.user.tier as "free" | "pro", "aiCall");
+
+  const aiConfig = await withUserKey(session!.user.id, { provider: parsed.data.provider, model: parsed.data.model });
+  const pairings = await suggestPairings(
+    {
+      title: recipe.title,
+      description: recipe.description,
+      difficulty: recipe.difficulty,
+      dietaryTags: recipe.dietaryTags as Record<string, boolean> | null,
+      ingredients: recipe.ingredients,
+    },
+    parsed.data.count,
+    aiConfig,
+    (session!.user as { locale?: string }).locale ?? "en"
+  );
+
+  await incrementUsage(session!.user.id, "aiCall");
+
+  return NextResponse.json({ pairings });
+}