Backend half

SerpentRace_Backend/node_modules/mariadb/lib/cmd/execute-stream.js

@@ -0,0 +1,61 @@
+//  SPDX-License-Identifier: LGPL-2.1-or-later
+//  Copyright (c) 2015-2024 MariaDB Corporation Ab
+
+'use strict';
+
+const Execute = require('./execute');
+const { Readable } = require('stream');
+
+/**
+ * Protocol COM_STMT_EXECUTE with streaming events.
+ * see : https://mariadb.com/kb/en/com_stmt_execute/
+ */
+class ExecuteStream extends Execute {
+  constructor(cmdParam, connOpts, prepare, socket) {
+    super(
+      () => {},
+      () => {},
+      connOpts,
+      cmdParam,
+      prepare
+    );
+    this.socket = socket;
+    this.inStream = new Readable({
+      objectMode: true,
+      read: () => {
+        this.socket.resume();
+      }
+    });
+
+    this.on('fields', function (meta) {
+      this.inStream.emit('fields', meta);
+    });
+
+    this.on('error', function (err) {
+      this.inStream.emit('error', err);
+    });
+
+    this.on('close', function (err) {
+      this.inStream.emit('error', err);
+    });
+
+    this.on('end', function (err) {
+      if (err) this.inStream.emit('error', err);
+      this.socket.resume();
+      this.inStream.push(null);
+    });
+
+    this.inStream.close = function () {
+      this.handleNewRows = () => {};
+      this.socket.resume();
+    }.bind(this);
+  }
+
+  handleNewRows(row) {
+    if (!this.inStream.push(row)) {
+      this.socket.pause();
+    }
+  }
+}
+
+module.exports = ExecuteStream;