🎭 feat: Override Custom Endpoint Schema with Specified Params Endpoint (#11788)

* 🔧 refactor: Simplify payload parsing and enhance getSaveOptions logic

- Removed unused bedrockInputSchema from payloadParser, streamlining the function.
- Updated payloadParser to handle optional chaining for model parameters.
- Enhanced getSaveOptions to ensure runOptions defaults to an empty object if parsing fails, improving robustness.
- Adjusted the assignment of maxContextTokens to use the instance variable for consistency.

* 🔧 fix: Update maxContextTokens assignment logic in initializeAgent function

- Enhanced the maxContextTokens assignment to allow for user-defined values, ensuring it defaults to a calculated value only when not provided or invalid. This change improves flexibility in agent initialization.

* 🧪 test: Add unit tests for initializeAgent function

- Introduced comprehensive unit tests for the initializeAgent function, focusing on maxContextTokens behavior.
- Tests cover scenarios for user-defined values, fallback calculations, and edge cases such as zero and negative values, enhancing overall test coverage and reliability of agent initialization logic.

* refactor: default params Endpoint Configuration Handling

- Integrated `getEndpointsConfig` to fetch endpoint configurations, allowing for dynamic handling of `defaultParamsEndpoint`.
- Updated `buildEndpointOption` to pass `defaultParamsEndpoint` to `parseCompactConvo`, ensuring correct parameter handling based on endpoint type.
- Added comprehensive unit tests for `buildDefaultConvo` and `cleanupPreset` to validate behavior with `defaultParamsEndpoint`, covering various scenarios and edge cases.
- Refactored related hooks and utility functions to support the new configuration structure, improving overall flexibility and maintainability.

* refactor: Centralize defaultParamsEndpoint retrieval

- Introduced `getDefaultParamsEndpoint` function to streamline the retrieval of `defaultParamsEndpoint` across various hooks and middleware.
- Updated multiple files to utilize the new function, enhancing code consistency and maintainability.
- Removed redundant logic for fetching `defaultParamsEndpoint`, simplifying the codebase.

api/server/middleware/buildEndpointOption.js

@@ -5,9 +5,11 @@ const {
   EModelEndpoint,
   isAgentsEndpoint,
   parseCompactConvo,
+  getDefaultParamsEndpoint,
 } = require('librechat-data-provider');
 const azureAssistants = require('~/server/services/Endpoints/azureAssistants');
 const assistants = require('~/server/services/Endpoints/assistants');
+const { getEndpointsConfig } = require('~/server/services/Config');
 const agents = require('~/server/services/Endpoints/agents');
 const { updateFilesUsage } = require('~/models');
 
@@ -19,9 +21,24 @@ const buildFunction = {
 
 async function buildEndpointOption(req, res, next) {
   const { endpoint, endpointType } = req.body;
+
+  let endpointsConfig;
+  try {
+    endpointsConfig = await getEndpointsConfig(req);
+  } catch (error) {
+    logger.error('Error fetching endpoints config in buildEndpointOption', error);
+  }
+
+  const defaultParamsEndpoint = getDefaultParamsEndpoint(endpointsConfig, endpoint);
+
   let parsedBody;
   try {
-    parsedBody = parseCompactConvo({ endpoint, endpointType, conversation: req.body });
+    parsedBody = parseCompactConvo({
+      endpoint,
+      endpointType,
+      conversation: req.body,
+      defaultParamsEndpoint,
+    });
   } catch (error) {
     logger.error(`Error parsing compact conversation for endpoint ${endpoint}`, error);
     logger.debug({
@@ -55,6 +72,7 @@ async function buildEndpointOption(req, res, next) {
         endpoint,
         endpointType,
         conversation: currentModelSpec.preset,
+        defaultParamsEndpoint,
       });
       if (currentModelSpec.iconURL != null && currentModelSpec.iconURL !== '') {
         parsedBody.iconURL = currentModelSpec.iconURL;