initial commit

logic/list_usernames.ts

@@ -0,0 +1,68 @@
+import { z } from "zod";
+import { ndk } from "../ndk.js";
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { getAllUsers } from "../config.js";
+import { NDKPrivateKeySigner } from "@nostr-dev-kit/ndk";
+
+/**
+ * List all available usernames in the system
+ * @returns Formatted list of available usernames
+ */
+export async function listUsernames() {
+    try {
+        const users = await Promise.all(
+            Object.values(getAllUsers()).map(async (user) => {
+                const signer = new NDKPrivateKeySigner(user.nsec);
+                const npub = (await signer.user()).npub;
+                return {
+                    name: user.display_name,
+                    npub: npub,
+                };
+            })
+        );
+
+        if (users.length === 0) {
+            return {
+                content: [
+                    {
+                        type: "text" as const,
+                        text: "No users found. Try creating a user with the create_pubkey command first.",
+                    },
+                ],
+            };
+        }
+
+        const usersList = users
+            .map((user) => `${user.name} - ${user.npub}`)
+            .join("\n");
+
+        return {
+            content: [
+                {
+                    type: "text" as const,
+                    text: `Available users (${users.length}):\n${usersList}`,
+                },
+            ],
+        };
+    } catch (error: unknown) {
+        const errorMessage =
+            error instanceof Error ? error.message : String(error);
+        throw new Error(`Failed to list usernames: ${errorMessage}`);
+    }
+}
+
+export function addListUsernamesCommand(server: McpServer) {
+    server.tool(
+        "list_usernames",
+        "List all available usernames in the system",
+        {
+            random_string: z
+                .string()
+                .optional()
+                .describe("Dummy parameter for no-parameter tools"),
+        },
+        async () => {
+            return listUsernames();
+        }
+    );
+}