refactor and add list_snippets

logic/fetch_snippet_by_id.ts

@@ -0,0 +1,78 @@
+import { z } from "zod";
+import { formatSnippets } from "../lib/converters/index.js";
+import { ndk } from "../ndk.js";
+import { SNIPPET_KIND } from "../lib/nostr/utils.js";
+import { log } from "../lib/utils/log.js";
+import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { toSnippet } from "../lib/converters/index.js";
+
+/**
+ * Fetch a snippet by its ID
+ * @param id Snippet ID to fetch
+ * @returns The snippet content or an error message
+ */
+export async function fetchSnippetById(id: string): Promise<{
+    content: Array<{ type: "text"; text: string }>;
+}> {
+    try {
+        log(`Fetching snippet with ID: ${id}`);
+
+        // Create filter for the specific event ID
+        const filter = {
+            kinds: [SNIPPET_KIND as number],
+            ids: [id],
+        };
+
+        // Fetch the event
+        const events = await ndk.fetchEvents(filter);
+        const event = Array.from(events)[0]; // Get the first (and should be only) event
+
+        if (!event) {
+            return {
+                content: [
+                    {
+                        type: "text",
+                        text: `No snippet found with ID: ${id}`,
+                    },
+                ],
+            };
+        }
+
+        // Convert event to snippet
+        const snippet = toSnippet(event);
+
+        // Format the snippet for display
+        const formattedSnippet = formatSnippets([snippet]);
+
+        return {
+            content: [
+                {
+                    type: "text",
+                    text: formattedSnippet,
+                },
+            ],
+        };
+    } catch (error: unknown) {
+        const errorMessage =
+            error instanceof Error ? error.message : String(error);
+        return {
+            content: [
+                {
+                    type: "text",
+                    text: `Error fetching snippet: ${errorMessage}`,
+                },
+            ],
+        };
+    }
+}
+
+export function addFetchSnippetByIdCommand(server: McpServer) {
+    server.tool(
+        "fetch_snippet_by_id",
+        "Fetch and display a snippet by its ID",
+        {
+            id: z.string().describe("ID of the snippet to fetch"),
+        },
+        async ({ id }) => fetchSnippetById(id)
+    );
+}