@n8n/n8n-nodes-langchain/dist/nodes/mcp/McpClientTool/utils.js


"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var utils_exports = {};
__export(utils_exports, {
  McpToolkit: () => McpToolkit,
  createCallTool: () => createCallTool,
  getErrorDescriptionFromToolCall: () => getErrorDescriptionFromToolCall,
  getSelectedTools: () => getSelectedTools,
  mcpToolToDynamicTool: () => mcpToolToDynamicTool
});
module.exports = __toCommonJS(utils_exports);
var import_tools = require("@langchain/core/tools");
var import_types = require("@modelcontextprotocol/sdk/types.js");
var import_agents = require("@langchain/classic/agents");
var import_zod = require("zod");
var import_schemaParsing = require("../../../utils/schemaParsing");
function getSelectedTools({
  mode,
  includeTools,
  excludeTools,
  tools
}) {
  switch (mode) {
    case "selected": {
      if (!includeTools?.length) return tools;
      const include = new Set(includeTools);
      return tools.filter((tool) => include.has(tool.name));
    }
    case "except": {
      const except = new Set(excludeTools ?? []);
      return tools.filter((tool) => !except.has(tool.name));
    }
    case "all":
    default:
      return tools;
  }
}
const getErrorDescriptionFromToolCall = (result) => {
  if (result && typeof result === "object") {
    if ("content" in result && Array.isArray(result.content)) {
      const errorMessage = result.content.find(
        (content) => content && typeof content === "object" && typeof content.text === "string"
      )?.text;
      return errorMessage;
    } else if ("toolResult" in result && typeof result.toolResult === "string") {
      return result.toolResult;
    }
    if ("message" in result && typeof result.message === "string") {
      return result.message;
    }
  }
  return void 0;
};
const createCallTool = (name, client, timeout, onError) => async (args) => {
  let result;
  function handleError(error) {
    const errorDescription = getErrorDescriptionFromToolCall(error) ?? `Failed to execute tool "${name}"`;
    onError(errorDescription);
    return errorDescription;
  }
  try {
    result = await client.callTool({ name, arguments: args }, import_types.CompatibilityCallToolResultSchema, {
      timeout
    });
  } catch (error) {
    return handleError(error);
  }
  if (result.isError) {
    return handleError(result);
  }
  if (result.toolResult !== void 0) {
    return result.toolResult;
  }
  if (result.content !== void 0) {
    return result.content;
  }
  return result;
};
function mcpToolToDynamicTool(tool, onCallTool) {
  const rawSchema = (0, import_schemaParsing.convertJsonSchemaToZod)(tool.inputSchema);
  const objectSchema = rawSchema instanceof import_zod.z.ZodObject ? rawSchema : import_zod.z.object({ value: rawSchema });
  return new import_tools.DynamicStructuredTool({
    name: tool.name,
    description: tool.description ?? "",
    schema: objectSchema,
    func: onCallTool,
    metadata: { isFromToolkit: true }
  });
}
class McpToolkit extends import_agents.Toolkit {
  constructor(tools) {
    super();
    this.tools = tools;
  }
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  McpToolkit,
  createCallTool,
  getErrorDescriptionFromToolCall,
  getSelectedTools,
  mcpToolToDynamicTool
});
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