feat: multi-provider AI support with per-provider model selection

- Add llm-factory.ts: unified LLM provider abstraction (Google/Claude/OpenAI) - Install @langchain/anthropic and @langchain/openai packages - resolveAiProvider picks active provider from DB settings (Claude > OpenAI > Google) - All AI graphs (reminder, new-patient, reschedule, internal-chat) now accept provider+model params - Add claudeAiModel, openAiModel, googleAiModel columns to ai_settings table - New PUT /api/ai/provider-model route to save selected model per provider - UI model dropdowns for Claude (Haiku/Sonnet/Opus), OpenAI (GPT-5.x series), Google (Gemini 2.5/3.x) - Google AI section also gets model selector alongside existing API key field Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-06 09:34:11 -04:00
parent d5bc96ff39
commit 4899ab8368
57 changed files with 681 additions and 138 deletions
@@ -0,0 +1,51 @@
+import { ChatGoogleGenerativeAI } from "@langchain/google-genai";
+import { ChatAnthropic } from "@langchain/anthropic";
+import { ChatOpenAI } from "@langchain/openai";
+
+export type AiProvider = "google" | "claude" | "openai";
+
+export function getLlm(provider: AiProvider, apiKey: string, model?: string) {
+  if (provider === "claude") {
+    return new ChatAnthropic({ model: model || "claude-haiku-4-5-20251001", apiKey });
+  }
+  if (provider === "openai") {
+    return new ChatOpenAI({ model: model || "gpt-4o-mini", apiKey });
+  }
+  return new ChatGoogleGenerativeAI({ model: model || "gemini-1.5-flash", apiKey });
+}
+
+export interface AiSettingsLike {
+  apiKey?: string | null;
+  claudeAiKey?: string | null;
+  claudeAiEnabled?: boolean | null;
+  claudeAiModel?: string | null;
+  openAiKey?: string | null;
+  openAiEnabled?: boolean | null;
+  openAiModel?: string | null;
+  googleAiModel?: string | null;
+}
+
+export function resolveAiProvider(settings: AiSettingsLike): { provider: AiProvider; key: string; model: string } | null {
+  if (settings.claudeAiEnabled && settings.claudeAiKey?.trim()) {
+    return {
+      provider: "claude",
+      key: settings.claudeAiKey.trim(),
+      model: settings.claudeAiModel?.trim() || "claude-haiku-4-5-20251001",
+    };
+  }
+  if (settings.openAiEnabled && settings.openAiKey?.trim()) {
+    return {
+      provider: "openai",
+      key: settings.openAiKey.trim(),
+      model: settings.openAiModel?.trim() || "gpt-5.2",
+    };
+  }
+  if (settings.apiKey?.trim()) {
+    return {
+      provider: "google",
+      key: settings.apiKey.trim(),
+      model: settings.googleAiModel?.trim() || "gemini-2.5-flash",
+    };
+  }
+  return null;
+}