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 RecipeOutputSchema = z.object({
+  title: z.string(),
+  description: z.string(),
+  baseServings: z.number().int().min(1).max(100),
+  prepMins: z.number().int().min(0).optional(),
+  cookMins: z.number().int().min(0).optional(),
+  difficulty: z.enum(["easy", "medium", "hard"]),
+  dietaryTags: z.object({
+    vegan: z.boolean().optional(),
+    vegetarian: z.boolean().optional(),
+    glutenFree: z.boolean().optional(),
+    dairyFree: z.boolean().optional(),
+    nutFree: z.boolean().optional(),
+    halal: z.boolean().optional(),
+    kosher: z.boolean().optional(),
+  }),
+  ingredients: z.array(z.object({
+    rawName: z.string(),
+    quantity: z.number().optional(),
+    unit: z.string().optional(),
+    note: z.string().optional(),
+  })),
+  steps: z.array(z.object({
+    instruction: z.string(),
+    timerSeconds: z.number().int().optional(),
+  })),
+});
+
+export type GeneratedRecipe = z.infer<typeof RecipeOutputSchema>;
+
+export async function generateRecipe(
+  prompt: string,
+  config?: AiConfig & { language?: string }
+): Promise<GeneratedRecipe> {
+  const model = resolveModel(config);
+  const lang = config?.language ?? "en";
+  const langInstruction = lang !== "en" ? ` Write the entire recipe (title, description, ingredient names, step instructions) in ${lang}.` : "";
+
+  const { object } = await generateObject({
+    model,
+    schema: RecipeOutputSchema,
+    system:
+      `You are a professional chef and culinary writer. Generate detailed, accurate, and delicious recipes. For ingredients: quantity must be a number only (e.g. 0.25, 1.5, 2), unit is a separate string (e.g. 'cup', 'tbsp', 'g', 'ml'). Never combine quantity and unit into one string. Include helpful notes for ingredients when relevant.${langInstruction}`,
+    prompt: `Create a recipe for: ${prompt}`,
+  });
+
+  return object;
+}