drawio-mcp-server/build/tool.js

Provides Draw.io services to MCP Clients

import { strip_internal_fields } from "./events.js";
export function build_channel({ bus, id_generator, log }, event_name, handler) {
    const fn = async (_args, _extra) => {
        const request_id = id_generator.generate();
        // const event_name = `get-selected-cell`;
        const reply_name = `${event_name}.${request_id}`;
        bus.send_to_extension({
            __event: event_name,
            __request_id: request_id,
            ..._args,
        });
        log.debug(`[${event_name}] emitted, waiting for reply @${reply_name}`);
        const p = new Promise((resolve, _reject) => {
            log.debug(`[${event_name}] waiting for response @${reply_name}`);
            bus.on_reply_from_extension(reply_name, (reply) => {
                // bus.on(reply_name, (args) => {
                log.debug(`[${reply_name}] received response`, reply);
                const data = strip_internal_fields(reply);
                const response = handler(data);
                resolve(response);
            });
        });
        return p;
    };
    return fn;
}
export function default_tool(name, context) {
    const fn = build_channel(context, name, (reply) => {
        const response = {
            content: [
                {
                    type: "text",
                    text: JSON.stringify(reply),
                },
            ],
        };
        return response;
    });
    return fn;
}