Allow users to specify OpenAI embedding and chat models

src/routes/api/openai.ts

@@ -0,0 +1,75 @@
+import axios from 'axios';
+import options from "../../services/options.js";
+import log from "../../services/log.js";
+import type { Request, Response } from "express";
+
+/**
+ * List available models from OpenAI
+ */
+async function listModels(req: Request, res: Response) {
+    try {
+        const { baseUrl } = req.body;
+
+        // Use provided base URL or default from options
+        const openaiBaseUrl = baseUrl || await options.getOption('openaiBaseUrl') || 'https://api.openai.com/v1';
+        const apiKey = await options.getOption('openaiApiKey');
+
+        if (!apiKey) {
+            throw new Error('OpenAI API key is not configured');
+        }
+
+        // Call OpenAI API to get models
+        const response = await axios.get(`${openaiBaseUrl}/models`, {
+            headers: {
+                'Content-Type': 'application/json',
+                'Authorization': `Bearer ${apiKey}`
+            },
+            timeout: 10000
+        });
+
+        // Filter and categorize models
+        const allModels = response.data.data || [];
+
+        // Separate models into chat models and embedding models
+        const chatModels = allModels
+            .filter((model: any) =>
+                // Include GPT models for chat
+                model.id.includes('gpt') ||
+                // Include Claude models via Azure OpenAI
+                model.id.includes('claude')
+            )
+            .map((model: any) => ({
+                id: model.id,
+                name: model.id,
+                type: 'chat'
+            }));
+
+        const embeddingModels = allModels
+            .filter((model: any) =>
+                // Only include embedding-specific models
+                model.id.includes('embedding') ||
+                model.id.includes('embed')
+            )
+            .map((model: any) => ({
+                id: model.id,
+                name: model.id,
+                type: 'embedding'
+            }));
+
+        // Return the models list
+        return {
+            success: true,
+            chatModels,
+            embeddingModels
+        };
+    } catch (error: any) {
+        log.error(`Error listing OpenAI models: ${error.message || 'Unknown error'}`);
+
+        // Properly throw the error to be handled by the global error handler
+        throw new Error(`Failed to list OpenAI models: ${error.message || 'Unknown error'}`);
+    }
+}
+
+export default {
+    listModels
+};