refactor: streamline endpoint configuration and enhance appConfig usage across services

packages/api/src/app/config.ts

@@ -0,0 +1,43 @@
+import { EModelEndpoint, removeNullishValues } from 'librechat-data-provider';
+import type { TCustomConfig, TEndpoint } from 'librechat-data-provider';
+import type { AppConfig } from '~/types';
+import { isEnabled, normalizeEndpointName } from '~/utils';
+
+/**
+ * Retrieves the balance configuration object
+ * */
+export function getBalanceConfig(appConfig?: AppConfig): Partial<TCustomConfig['balance']> | null {
+  const isLegacyEnabled = isEnabled(process.env.CHECK_BALANCE);
+  const startBalance = process.env.START_BALANCE;
+  /** @type {} */
+  const config: Partial<TCustomConfig['balance']> = removeNullishValues({
+    enabled: isLegacyEnabled,
+    startBalance: startBalance != null && startBalance ? parseInt(startBalance, 10) : undefined,
+  });
+  if (!appConfig) {
+    return config;
+  }
+  return { ...config, ...(appConfig?.['balance'] ?? {}) };
+}
+
+export const getCustomEndpointConfig = ({
+  endpoint,
+  appConfig,
+}: {
+  endpoint: string | EModelEndpoint;
+  appConfig?: AppConfig;
+}): Partial<TEndpoint> | undefined => {
+  if (!appConfig) {
+    throw new Error(`Config not found for the ${endpoint} custom endpoint.`);
+  }
+
+  const customEndpoints = appConfig.endpoints?.[EModelEndpoint.custom] ?? [];
+  return customEndpoints.find(
+    (endpointConfig) => normalizeEndpointName(endpointConfig.name) === endpoint,
+  );
+};
+
+export function hasCustomUserVars(appConfig?: AppConfig): boolean {
+  const mcpServers = appConfig?.mcpConfig;
+  return Object.values(mcpServers ?? {}).some((server) => server.customUserVars);
+}

packages/api/src/app/index.ts

@@ -0,0 +1 @@
+export * from './config';

packages/api/src/index.ts

@@ -1,3 +1,4 @@
+export * from './app';
 /* MCP */
 export * from './mcp/MCPManager';
 export * from './mcp/oauth';