dtamind-components
Version:
Apps integration for Dtamind. Contain Nodes and Credentials.
145 lines • 5.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MCPToolkit = void 0;
exports.MCPTool = MCPTool;
const types_js_1 = require("@modelcontextprotocol/sdk/types.js");
const index_js_1 = require("@modelcontextprotocol/sdk/client/index.js");
const stdio_js_1 = require("@modelcontextprotocol/sdk/client/stdio.js");
const tools_1 = require("@langchain/core/tools");
const zod_1 = require("zod");
const streamableHttp_js_1 = require("@modelcontextprotocol/sdk/client/streamableHttp.js");
const sse_js_1 = require("@modelcontextprotocol/sdk/client/sse.js");
class MCPToolkit extends tools_1.BaseToolkit {
constructor(serverParams, transportType) {
super();
this.tools = [];
this._tools = null;
this.transport = null;
this.client = null;
this.serverParams = serverParams;
this.transportType = transportType;
}
// Method to create a new client with transport
async createClient() {
const client = new index_js_1.Client({
name: 'dtamind-client',
version: '1.0.0'
}, {
capabilities: {}
});
let transport;
if (this.transportType === 'stdio') {
// Compatible with overridden PATH configuration
const params = {
...this.serverParams,
env: {
...(this.serverParams.env || {}),
PATH: process.env.PATH
}
};
transport = new stdio_js_1.StdioClientTransport(params);
await client.connect(transport);
}
else {
if (this.serverParams.url === undefined) {
throw new Error('URL is required for SSE transport');
}
const baseUrl = new URL(this.serverParams.url);
try {
if (this.serverParams.headers) {
transport = new streamableHttp_js_1.StreamableHTTPClientTransport(baseUrl, {
requestInit: {
headers: this.serverParams.headers
}
});
}
else {
transport = new streamableHttp_js_1.StreamableHTTPClientTransport(baseUrl);
}
await client.connect(transport);
}
catch (error) {
if (this.serverParams.headers) {
transport = new sse_js_1.SSEClientTransport(baseUrl, {
requestInit: {
headers: this.serverParams.headers
},
eventSourceInit: {
fetch: (url, init) => fetch(url, { ...init, headers: this.serverParams.headers })
}
});
}
else {
transport = new sse_js_1.SSEClientTransport(baseUrl);
}
await client.connect(transport);
}
}
return client;
}
async initialize() {
if (this._tools === null) {
this.client = await this.createClient();
this._tools = await this.client.request({ method: 'tools/list' }, types_js_1.ListToolsResultSchema);
this.tools = await this.get_tools();
// Close the initial client after initialization
await this.client.close();
}
}
async get_tools() {
if (this._tools === null || this.client === null) {
throw new Error('Must initialize the toolkit first');
}
const toolsPromises = this._tools.tools.map(async (tool) => {
if (this.client === null) {
throw new Error('Client is not initialized');
}
return await MCPTool({
toolkit: this,
name: tool.name,
description: tool.description || '',
argsSchema: createSchemaModel(tool.inputSchema)
});
});
const res = await Promise.allSettled(toolsPromises);
const errors = res.filter((r) => r.status === 'rejected');
if (errors.length !== 0) {
console.error('MCP Tools falied to be resolved', errors);
}
const successes = res.filter((r) => r.status === 'fulfilled').map((r) => r.value);
return successes;
}
}
exports.MCPToolkit = MCPToolkit;
async function MCPTool({ toolkit, name, description, argsSchema }) {
return (0, tools_1.tool)(async (input) => {
// Create a new client for this request
const client = await toolkit.createClient();
try {
const req = { method: 'tools/call', params: { name: name, arguments: input } };
const res = await client.request(req, types_js_1.CallToolResultSchema);
const content = res.content;
const contentString = JSON.stringify(content);
return contentString;
}
finally {
// Always close the client after the request completes
await client.close();
}
}, {
name: name,
description: description,
schema: argsSchema
});
}
function createSchemaModel(inputSchema) {
if (inputSchema.type !== 'object' || !inputSchema.properties) {
throw new Error('Invalid schema type or missing properties');
}
const schemaProperties = Object.entries(inputSchema.properties).reduce((acc, [key, _]) => {
acc[key] = zod_1.z.any();
return acc;
}, {});
return zod_1.z.object(schemaProperties);
}
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