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 +1,69 @@
+import { generateObject } from "ai";
+import { z } from "zod";
+import { resolveModel, type AiConfig } from "../factory";
+
+const VariationsOutputSchema = z.object({
+  variations: z.array(z.object({
+    title: z.string(),
+    description: z.string(),
+    changedIngredients: z.array(z.object({
+      original: z.string(),
+      replacement: z.string(),
+      note: z.string().optional(),
+    })),
+    changedSteps: z.array(z.object({
+      stepNumber: z.number().int(),
+      change: z.string(),
+    })).optional(),
+    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(),
+    }).optional(),
+  })),
+});
+
+export type VariationSuggestion = z.infer<typeof VariationsOutputSchema>["variations"][number];
+
+const LANG: Record<string, string> = { en: "English", fr: "French" };
+
+export async function suggestVariations(
+  recipe: {
+    title: string;
+    description?: string | null;
+    ingredients: Array<{ rawName: string; quantity?: string | null; unit?: string | null }>;
+    steps: Array<{ instruction: string }>;
+  },
+  count = 3,
+  config?: AiConfig,
+  directions?: string,
+  locale?: string
+): Promise<VariationSuggestion[]> {
+  const model = resolveModel(config);
+  const lang = LANG[locale ?? "en"] ?? "English";
+
+  const recipeText = [
+    `Recipe: ${recipe.title}`,
+    recipe.description ? `Description: ${recipe.description}` : "",
+    `Ingredients: ${recipe.ingredients.map((i) => `${i.quantity ?? ""} ${i.unit ?? ""} ${i.rawName}`.trim()).join(", ")}`,
+    `Steps: ${recipe.steps.map((s, i) => `${i + 1}. ${s.instruction}`).join(" | ")}`,
+  ].filter(Boolean).join("\n");
+
+  const directionsClause = directions?.trim()
+    ? `\n\nUser directions: ${directions.trim()}`
+    : "";
+
+  const { object } = await generateObject({
+    model,
+    schema: VariationsOutputSchema,
+    system:
+      `You are a creative chef. Suggest meaningful variations of recipes — dietary adaptations, flavor profiles, technique changes. Each variation should be distinct and practical. Respond in ${lang}.`,
+    prompt: `Suggest ${count} variations of this recipe:\n\n${recipeText}${directionsClause}`,
+  });
+
+  return object.variations;
+}