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 +1,114 @@
+import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
+import { and, eq } from "@epicure/db";
+import { db, recipes, recipeIngredients, recipeSteps } from "@epicure/db";
+import { requireSession } from "@/lib/api-auth";
+import { checkTierLimit, incrementUsage } from "@/lib/tiers";
+import { adaptRecipe } from "@/lib/ai/features/adapt-recipe";
+import { withUserKey } from "@/lib/ai/resolve-user-key";
+
+const Schema = z.object({
+  excludeIngredients: z.array(z.string()).default([]),
+  extraConstraints: z.string().max(500).optional(),
+  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;
+  const userId = session!.user.id;
+
+  const recipe = await db.query.recipes.findFirst({
+    where: and(eq(recipes.id, id)),
+    with: {
+      ingredients: { orderBy: (t, { asc }) => asc(t.order) },
+      steps: { orderBy: (t, { asc }) => asc(t.order) },
+    },
+  });
+  if (!recipe || (recipe.visibility === "private" && recipe.authorId !== userId)) {
+    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 });
+
+  if (parsed.data.excludeIngredients.length === 0 && !parsed.data.extraConstraints?.trim()) {
+    return NextResponse.json({ error: "Provide at least one constraint" }, { status: 400 });
+  }
+
+  await checkTierLimit(userId, session!.user.tier as "free" | "pro", "aiCall");
+
+  const aiConfig = await withUserKey(userId, { provider: parsed.data.provider, model: parsed.data.model });
+  const adapted = await adaptRecipe(
+    {
+      title: recipe.title,
+      description: recipe.description,
+      baseServings: recipe.baseServings,
+      ingredients: recipe.ingredients,
+      steps: recipe.steps,
+    },
+    {
+      excludeIngredients: parsed.data.excludeIngredients,
+      extraConstraints: parsed.data.extraConstraints,
+    },
+    aiConfig,
+    (session!.user as { locale?: string }).locale ?? "en"
+  );
+
+  await incrementUsage(userId, "aiCall");
+
+  const newId = crypto.randomUUID();
+  const now = new Date();
+
+  await db.transaction(async (tx) => {
+    await tx.insert(recipes).values({
+      id: newId,
+      authorId: userId,
+      title: adapted.title,
+      description: adapted.description,
+      baseServings: adapted.baseServings,
+      visibility: "private",
+      difficulty: adapted.difficulty,
+      prepMins: adapted.prepMins,
+      cookMins: adapted.cookMins,
+      dietaryTags: adapted.dietaryTags ?? {},
+      aiGenerated: true,
+      createdAt: now,
+      updatedAt: now,
+    });
+
+    if (adapted.ingredients.length > 0) {
+      await tx.insert(recipeIngredients).values(
+        adapted.ingredients.map((ing, i) => ({
+          id: crypto.randomUUID(),
+          recipeId: newId,
+          rawName: ing.rawName,
+          quantity: ing.quantity !== undefined ? String(ing.quantity) : undefined,
+          unit: ing.unit,
+          note: ing.note,
+          order: i,
+        }))
+      );
+    }
+
+    if (adapted.steps.length > 0) {
+      await tx.insert(recipeSteps).values(
+        adapted.steps.map((step, i) => ({
+          id: crypto.randomUUID(),
+          recipeId: newId,
+          instruction: step.instruction,
+          timerSeconds: step.timerSeconds,
+          order: i,
+        }))
+      );
+    }
+  });
+
+  return NextResponse.json({ id: newId, adaptationNotes: adapted.adaptationNotes });
+}