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 +1,50 @@
+import { createOpenAI } from "@ai-sdk/openai";
+import { createAnthropic } from "@ai-sdk/anthropic";
+import type { LanguageModel } from "ai";
+
+export type AiProvider = "openai" | "anthropic" | "openrouter" | "ollama";
+
+export type AiConfig = {
+  provider?: AiProvider;
+  model?: string;
+  apiKey?: string;
+};
+
+export function resolveModel(config: AiConfig = {}): LanguageModel {
+  const provider = config.provider ?? getDefaultProvider();
+
+  switch (provider) {
+    case "openai": {
+      const openai = createOpenAI({ apiKey: config.apiKey ?? process.env["OPENAI_API_KEY"] });
+      return openai(config.model ?? "gpt-4o-mini");
+    }
+    case "anthropic": {
+      const anthropic = createAnthropic({ apiKey: config.apiKey ?? process.env["ANTHROPIC_API_KEY"] });
+      return anthropic(config.model ?? "claude-haiku-4-5-20251001");
+    }
+    case "openrouter": {
+      const openrouter = createOpenAI({
+        apiKey: config.apiKey ?? process.env["OPENROUTER_API_KEY"],
+        baseURL: "https://openrouter.ai/api/v1",
+      });
+      return openrouter(config.model ?? process.env["OPENROUTER_DEFAULT_MODEL"] ?? "google/gemini-flash-1.5");
+    }
+    case "ollama": {
+      const ollama = createOpenAI({
+        apiKey: "ollama",
+        baseURL: process.env["OLLAMA_BASE_URL"] ?? "http://localhost:11434/v1",
+      });
+      return ollama(config.model ?? "llama3.2");
+    }
+    default: {
+      throw new Error(`Unknown AI provider: ${String(provider)}`);
+    }
+  }
+}
+
+function getDefaultProvider(): AiProvider {
+  if (process.env["OPENROUTER_API_KEY"]) return "openrouter";
+  if (process.env["OPENAI_API_KEY"]) return "openai";
+  if (process.env["ANTHROPIC_API_KEY"]) return "anthropic";
+  return "ollama";
+}