feat: regenerate recipe with modifications from the editor

Every existing AI entry point (generate, generate-from-idea, adapt, variations) either creates a new recipe or a saved variation — none let you revise the draft you're currently editing in place. Adds a stateless /api/v1/ai/regenerate endpoint that takes the editor's current in-progress fields (not a recipeId, so unsaved edits are included) plus a free-text instruction, and returns a full revised draft the editor merges into its own state. No DB write happens; the user still saves normally. v0.42.0
2026-07-17 17:11:37 +02:00
parent 77c739960d
commit 25e624f618
11 changed files with 314 additions and 3 deletions
@@ -0,0 +1,56 @@
+import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
+import { requireSessionOrApiKey } from "@/lib/api-auth";
+import { applyRateLimit } from "@/lib/rate-limit";
+import { withAiQuota, resolveAiConfigOrError } from "@/lib/ai/ai-error";
+import { regenerateRecipe } from "@/lib/ai/features/regenerate-recipe";
+import { withUserKey } from "@/lib/ai/resolve-user-key";
+
+const Schema = z.object({
+  title: z.string().min(1).max(200),
+  description: z.string().max(2000).optional(),
+  baseServings: z.number().int().min(1).max(100),
+  difficulty: z.enum(["easy", "medium", "hard"]).optional(),
+  ingredients: z.array(z.object({
+    rawName: z.string().min(1).max(200),
+    quantity: z.union([z.string(), z.number()]).optional(),
+    unit: z.string().max(50).optional(),
+  })).max(100),
+  steps: z.array(z.object({ instruction: z.string().min(1).max(2000) })).max(100),
+  instruction: z.string().min(1).max(500),
+  language: z.string().max(10).default("en"),
+  provider: z.enum(["openai", "anthropic", "openrouter", "ollama"]).optional(),
+  model: z.string().optional(),
+});
+
+// No recipeId, no DB access — this is a stateless AI transform over whatever
+// draft the editor currently holds (including unsaved edits), not the saved
+// row. The caller merges the result into their own in-progress form state.
+export async function POST(req: NextRequest) {
+  const { session, response } = await requireSessionOrApiKey(req);
+  if (response) return response;
+
+  const body = await req.json() as unknown;
+  const parsed = Schema.safeParse(body);
+  if (!parsed.success) {
+    return NextResponse.json({ error: "Validation error", issues: parsed.error.issues }, { status: 400 });
+  }
+
+  const limited = await applyRateLimit(`rl:ai:${session!.user.id}`, 10, 60);
+  if (limited) return limited;
+
+  const configResult = await resolveAiConfigOrError(() =>
+    withUserKey(session!.user.id, { provider: parsed.data.provider, model: parsed.data.model })
+  );
+  if (!configResult.ok) return configResult.response;
+  const aiConfig = configResult.data;
+
+  const { instruction, language, ...current } = parsed.data;
+
+  const result = await withAiQuota(session!.user.id, session!.user.tier as "free" | "pro", () =>
+    regenerateRecipe(current, instruction, { ...aiConfig, language }), { skipQuota: aiConfig.isByok }
+  );
+  if (!result.ok) return result.response;
+
+  return NextResponse.json(result.data);
+}