Add files via upload

Author: rohitpackt

07 - building clients/solutions/typescript/src/client-llm.ts

@@ -160,3 +160,4 @@ main().catch((error) => {
 
 });
 
+

07 - building clients/solutions/typescript/src/index.ts

@@ -0,0 +1,98 @@
+import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+import { z } from "zod";
+
+// Create an MCP server
+const server = new McpServer({
+  name: "Demo",
+  version: "1.0.0"
+});
+
+/* 
+- Ask for products of a certain category.
+- Adding products to the cart all done using natural language.
+*/
+
+const products = [{
+  id: 1,
+  name: "Red ridinghood",
+  category: "books" 
+},
+{
+  id: 2,
+  name: "Three musketeers",
+  category: "books" 
+},
+{
+  id: 3,
+  name: "White album",
+  category: "music" 
+}]
+
+let cart: typeof products = []
+
+// Add a tool
+server.tool(
+  "products",
+  "get products by category",
+  { 
+    category: z.string().optional() 
+  },
+  async ({ category }) => {
+    category = String(category).toLowerCase();
+    console.log("Server: ", category);
+
+    let filteredProducts = category ? products.filter(p => p.category === category): products;
+
+    return {
+      content: [{ type: "text", text: filteredProducts.map(p => p.name).join(",") }]
+    };
+  }
+);
+
+server.tool(
+  "cart-list",
+  "get products in cart",
+  {},
+  async () => {
+    return {
+      content: [{ type: "text", text: cart.map(p => p.name).join(", ") || "Cart is empty" }]
+    };
+  }
+);
+
+server.tool(
+  "cart-add",
+  "Adding products to cart",
+  { 
+    title: z.string().optional()
+  },
+  async ({ title }) => {
+    title = String(title).toLowerCase();
+    // TODO, use the input that's present, if neither is present answer with error
+    let foundProduct = products.find(p => p.name.toLowerCase().startsWith(title));
+
+    let response = foundProduct ? `Added ${foundProduct.name} to cart` : `Product not found`;
+    if (foundProduct) {
+      // TODO, use the input that's present, if neither is present answer with error
+      cart.push(foundProduct);
+    }
+
+    return {
+      content: [{ type: "text", text: response }]
+    };
+  }
+);
+
+
+// Add an addition tool
+server.tool("add",
+  { a: z.number(), b: z.number() },
+  async ({ a, b }) => ({
+    content: [{ type: "text", text: String(a + b) }]
+  })
+);
+
+// Start receiving messages on stdin and sending messages on stdout
+const transport = new StdioServerTransport();
+await server.connect(transport);