/**
* ValidateDataElement Handler - Validate ABAP DataElement Name
*
* Uses AdtClient.validateDataElement from @mcp-abap-adt/adt-clients.
* Low-level handler: single method call.
*/
import { AdtClient } from '@mcp-abap-adt/adt-clients';
import type { HandlerContext } from '../../../lib/handlers/interfaces';
import {
type AxiosResponse,
parseValidationResponse,
restoreSessionInConnection,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'ValidateDataElementLow',
description:
'[low-level] Validate an ABAP data element name before creation. Checks if the name is valid and available. Returns validation result with success status and message. Can use session_id and session_state from GetSession to maintain the same session.',
inputSchema: {
type: 'object',
properties: {
data_element_name: {
type: 'string',
description: 'DataElement name to validate (e.g., Z_MY_PROGRAM).',
},
package_name: {
type: 'string',
description:
'Package name (e.g., ZOK_LOCAL, $TMP for local objects). Required for validation.',
},
description: {
type: 'string',
description: 'DataElement description. Required for validation.',
},
session_id: {
type: 'string',
description:
'Session ID from GetSession. If not provided, a new session will be created.',
},
session_state: {
type: 'object',
description:
'Session state from GetSession (cookies, csrf_token, cookie_store). Required if session_id is provided.',
properties: {
cookies: { type: 'string' },
csrf_token: { type: 'string' },
cookie_store: { type: 'object' },
},
},
},
required: ['data_element_name', 'package_name', 'description'],
},
} as const;
interface ValidateDataElementArgs {
data_element_name: string;
package_name: string;
description: string;
session_id?: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for ValidateDataElement MCP tool
*
* Uses AdtClient.validateDataElement - low-level single method call
*/
export async function handleValidateDataElement(
context: HandlerContext,
args: ValidateDataElementArgs,
) {
const { connection, logger } = context;
try {
const {
data_element_name,
description,
package_name,
session_id,
session_state,
} = args as ValidateDataElementArgs;
// Validation
if (!data_element_name || !package_name || !description) {
return return_error(
new Error(
'data_element_name, package_name, and description are required',
),
);
}
const client = new AdtClient(connection);
// Restore session state if provided
if (session_id && session_state) {
await restoreSessionInConnection(connection, session_id, session_state);
} else {
// Ensure connection is established
}
const dataElementName = data_element_name.toUpperCase();
logger?.info(`Starting data element validation: ${dataElementName}`);
try {
// Validate data element
let validationResponse: unknown;
try {
const validationState = await client.getDataElement().validate({
dataElementName: dataElementName,
packageName: package_name.toUpperCase(),
description: description,
});
validationResponse = validationState.validationResponse;
} catch (validateError: any) {
// If validation throws an error with response, use it
if (validateError.response) {
validationResponse = validateError.response;
} else {
throw validateError;
}
}
if (!validationResponse) {
logger?.error(
`Validation did not return a result for data element ${dataElementName}`,
);
throw new Error('Validation did not return a result');
}
const result = parseValidationResponse(
validationResponse as AxiosResponse,
);
// Get updated session state after validation
logger?.info(
`✅ ValidateDataElement completed: ${dataElementName} (valid=${result.valid})`,
);
return return_response({
data: JSON.stringify(
{
success: result.valid,
data_element_name: dataElementName,
validation_result: result,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: result.valid
? `DataElement name ${dataElementName} is valid and available`
: `DataElement name ${dataElementName} validation failed: ${result.message}`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error validating data element ${dataElementName}: ${error?.message || error}`,
);
// If validation endpoint returns 400, try to parse it as validation response
if (error.response?.status === 400) {
try {
const result = parseValidationResponse(error.response);
return return_response({
data: JSON.stringify(
{
success: result.valid,
data_element_name: dataElementName,
validation_result: result,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: result.valid
? `DataElement name ${dataElementName} is valid and available`
: `DataElement name ${dataElementName} validation failed: ${result.message}`,
},
null,
2,
),
} as AxiosResponse);
} catch (_parseError) {
// If parsing fails, continue with error handling
}
}
// Parse error message
let errorMessage = `Failed to validate data element: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `DataElement ${dataElementName} not found.`;
} else if (
error.response?.data &&
typeof error.response.data === 'string'
) {
try {
const { XMLParser } = require('fast-xml-parser');
const parser = new XMLParser({
ignoreAttributes: false,
attributeNamePrefix: '@_',
});
const errorData = parser.parse(error.response.data);
const errorMsg =
errorData['exc:exception']?.message?.['#text'] ||
errorData['exc:exception']?.message;
if (errorMsg) {
errorMessage = `SAP Error: ${errorMsg}`;
}
} catch (_parseError) {
// Ignore parse errors
}
}
return return_error(new Error(errorMessage));
}
} catch (error: any) {
return return_error(error);
}
}
