mcp-youtube

import { z } from "zod"; import { CallToolResult } from "@modelcontextprotocol/sdk/types.js"; import { IServiceContainer } from "../container.js"; export abstract class BaseTool< // Enforce ZodObject to ensure .shape property exists T extends z.ZodObject<z.ZodRawShape> = z.ZodObject<z.ZodRawShape>, > { // Dependencies are injected automatically via constructor constructor(protected container: IServiceContainer) {} // Abstract properties that every tool must define abstract name: string; abstract description: string; abstract schema: T; // The actual logic implementation protected abstract executeImpl(params: z.infer<T>): Promise<CallToolResult>; // Public entry point that handles error catching and logging public async execute(params: unknown): Promise<CallToolResult> { try { // 1. Validate Input (Runtime check) const validatedParams = await this.schema.parseAsync(params); // 2. Run Logic return await this.executeImpl(validatedParams); } catch (err) { // 3. Centralized Error Handling const errorMessage = err instanceof Error ? err.message : String(err); console.error(`Tool execution failed: ${this.name}`, { error: errorMessage, }); return { content: [{ type: "text", text: `Error: ${errorMessage}` }], isError: true, }; } } // Helper to format the tool for the MCP SDK registration public getDefinition() { return { description: this.description, // eslint-disable-next-line @typescript-eslint/no-explicit-any inputSchema: this.schema as unknown as z.ZodObject<any>, }; } }