feat: Add option databaseOptions.clientMetadata to send custom metadata to database server for logging and debugging (#10017)

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -134,6 +134,7 @@ export class MongoStorageAdapter implements StorageAdapter {
   _onchange: any;
   _stream: any;
   _logClientEvents: ?Array<any>;
+  _clientMetadata: ?{ name: string, version: string };
   // Public
   connectionPromise: ?Promise<any>;
   database: any;
@@ -156,6 +157,7 @@ export class MongoStorageAdapter implements StorageAdapter {
     this.schemaCacheTtl = mongoOptions.schemaCacheTtl;
     this.disableIndexFieldValidation = !!mongoOptions.disableIndexFieldValidation;
     this._logClientEvents = mongoOptions.logClientEvents;
+    this._clientMetadata = mongoOptions.clientMetadata;
 
     // Create a copy of mongoOptions and remove Parse Server-specific options that should not
     // be passed to MongoDB client. Note: We only delete from this._mongoOptions, not from the
@@ -179,7 +181,17 @@ export class MongoStorageAdapter implements StorageAdapter {
     // parsing and re-formatting causes the auth value (if there) to get URI
     // encoded
     const encodedUri = formatUrl(parseUrl(this._uri));
-    this.connectionPromise = MongoClient.connect(encodedUri, this._mongoOptions)
+
+    // Only use driverInfo if clientMetadata option is set
+    const options = { ...this._mongoOptions };
+    if (this._clientMetadata) {
+      options.driverInfo = {
+        name: this._clientMetadata.name,
+        version: this._clientMetadata.version
+      };
+    }
+
+    this.connectionPromise = MongoClient.connect(encodedUri, options)
       .then(client => {
         // Starting mongoDB 3.0, the MongoClient.connect don't return a DB anymore but a client
         // Fortunately, we can get back the options and use them to select the proper DB.