/**
* GetDataElement Handler - Read ABAP Data Element via AdtClient
*
* Uses AdtClient.getDataElement().read() for high-level read operation.
* Supports both active and inactive versions.
*/
import { AdtClient } from '@mcp-abap-adt/adt-clients';
import type { HandlerContext } from '../../../lib/handlers/interfaces';
import {
type AxiosResponse,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'GetDataElement',
description:
'Retrieve ABAP data element definition. Supports reading active or inactive version.',
inputSchema: {
type: 'object',
properties: {
data_element_name: {
type: 'string',
description: 'Data element name (e.g., Z_MY_DATA_ELEMENT).',
},
version: {
type: 'string',
enum: ['active', 'inactive'],
description:
'Version to read: "active" (default) for deployed version, "inactive" for modified but not activated version.',
default: 'active',
},
},
required: ['data_element_name'],
},
} as const;
interface GetDataElementArgs {
data_element_name: string;
version?: 'active' | 'inactive';
}
/**
* Main handler for GetDataElement MCP tool
*
* Uses AdtClient.getDataElement().read() - high-level read operation
*/
export async function handleGetDataElement(
context: HandlerContext,
args: GetDataElementArgs,
) {
const { connection, logger } = context;
try {
const { data_element_name, version = 'active' } =
args as GetDataElementArgs;
// Validation
if (!data_element_name) {
return return_error(new Error('data_element_name is required'));
}
const client = new AdtClient(connection, logger);
const dataElementName = data_element_name.toUpperCase();
logger?.info(
`Reading data element ${dataElementName}, version: ${version}`,
);
try {
// Read data element using AdtClient
const dataElementObject = client.getDataElement();
const readResult = await dataElementObject.read(
{ dataElementName },
version as 'active' | 'inactive',
);
if (!readResult || !readResult.readResult) {
throw new Error(`Data element ${dataElementName} not found`);
}
// Extract data from read result
const dataElementData =
typeof readResult.readResult.data === 'string'
? readResult.readResult.data
: JSON.stringify(readResult.readResult.data);
logger?.info(
`✅ GetDataElement completed successfully: ${dataElementName}`,
);
return return_response({
data: JSON.stringify(
{
success: true,
data_element_name: dataElementName,
version,
data_element_data: dataElementData,
status: readResult.readResult.status,
status_text: readResult.readResult.statusText,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error reading data element ${dataElementName}: ${error?.message || error}`,
);
// Parse error message
let errorMessage = `Failed to read data element: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Data element ${dataElementName} not found.`;
} else if (error.response?.status === 423) {
errorMessage = `Data element ${dataElementName} is locked by another user.`;
}
return return_error(new Error(errorMessage));
}
} catch (error: any) {
return return_error(error);
}
}
