chore: add missing tool file

Author: himanshusinghs

src/tools/mongodb/connect/switchConnection.ts

@@ -0,0 +1,58 @@
+import z from "zod";
+import { type CallToolResult } from "@modelcontextprotocol/sdk/types.js";
+
+import { MongoDBToolBase } from "../mongodbTool.js";
+import { type ToolArgs, type OperationType, type ToolConstructorParams } from "../../tool.js";
+import type { Server } from "../../../server.js";
+
+export class SwitchConnectionTool extends MongoDBToolBase {
+    public override name = "switch-connection";
+    protected override description =
+        "Switch to a different MongoDB connection. If the user has configured a connection string or has previously called the connect tool, a connection is already established and there's no need to call this tool unless the user has explicitly requested to switch to a new instance.";
+
+    protected override argsShape = {
+        connectionString: z
+            .string()
+            .optional()
+            .describe(
+                "MongoDB connection string to switch to (in the mongodb:// or mongodb+srv:// format). If a connection string is not provided, the connection string from the config will be used."
+            ),
+    };
+
+    public override operationType: OperationType = "connect";
+
+    constructor({ session, config, telemetry, elicitation }: ToolConstructorParams) {
+        super({ session, config, telemetry, elicitation });
+        session.on("connect", () => {
+            this.enable();
+        });
+
+        session.on("disconnect", () => {
+            this.disable();
+        });
+    }
+
+    public override register(server: Server): boolean {
+        const registrationSuccessful = super.register(server);
+        /**
+         * When connected to mongodb we want to swap connect with
+         * switch-connection tool.
+         */
+        if (registrationSuccessful && !this.session.isConnectedToMongoDB) {
+            this.disable();
+        }
+        return registrationSuccessful;
+    }
+
+    protected override async execute({ connectionString }: ToolArgs<typeof this.argsShape>): Promise<CallToolResult> {
+        if (typeof connectionString !== "string") {
+            await this.session.connectToConfiguredConnection();
+        } else {
+            await this.session.connectToMongoDB({ connectionString });
+        }
+
+        return {
+            content: [{ type: "text", text: "Successfully connected to MongoDB." }],
+        };
+    }
+}