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 +1,52 @@
+import { generateObject } from "ai";
+import { z } from "zod";
+import { resolveModel, type AiConfig } from "../factory";
+
+const ScaledIngredientsSchema = z.object({
+  ingredients: z.array(
+    z.object({
+      rawName: z.string(),
+      quantity: z.string(),
+      unit: z.string().nullable(),
+      note: z.string().optional(),
+    })
+  ),
+});
+
+export type ScaledIngredient = z.infer<typeof ScaledIngredientsSchema>["ingredients"][number];
+
+type RecipeInput = {
+  title: string;
+  baseServings: number;
+  ingredients: Array<{
+    rawName: string;
+    quantity: string | null;
+    unit: string | null;
+  }>;
+};
+
+export async function scaleRecipe(
+  recipe: RecipeInput,
+  targetServings: number,
+  originalServings: number,
+  config?: AiConfig,
+  locale?: string
+): Promise<ScaledIngredient[]> {
+  const model = resolveModel(config);
+
+  const ingredientList = recipe.ingredients
+    .map((ing) => {
+      const parts = [ing.quantity, ing.unit, ing.rawName].filter(Boolean);
+      return `- ${parts.join(" ")}`;
+    })
+    .join("\n");
+
+  const { object } = await generateObject({
+    model,
+    schema: ScaledIngredientsSchema,
+    system: `You are a culinary scaling expert. Scale recipe ingredients from ${originalServings} to ${targetServings} servings. Use practical quantities — no 0.33 eggs (round to whole), no 0.17 cans (use 0.25 or 0.5), avoid impractical fractions. Substitute whole units where sensible. Add a note when rounding significantly.`,
+    prompt: `Recipe: "${recipe.title}"\n\nIngredients to scale:\n${ingredientList}`,
+  });
+
+  return object.ingredients;
+}