/**
* UnlockClass Handler - Unlock ABAP Class
*
* Uses AdtClient.unlockClass 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,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'UnlockClassLow',
description:
'[low-level] Unlock an ABAP class after modification. Uses session from HandlerContext. Must use the same lock_handle from LockClass operation.',
inputSchema: {
type: 'object',
properties: {
class_name: {
type: 'string',
description: 'Class name (e.g., ZCL_MY_CLASS).',
},
lock_handle: {
type: 'string',
description: 'Lock handle from LockClass operation.',
},
},
required: ['class_name', 'lock_handle'],
},
} as const;
interface UnlockClassArgs {
class_name: string;
lock_handle: string;
}
/**
* Main handler for UnlockClass MCP tool
*
* Uses AdtClient.unlockClass - low-level single method call
*/
export async function handleUnlockClass(
context: HandlerContext,
args: UnlockClassArgs,
) {
const { connection, logger } = context;
try {
const { class_name, lock_handle } = args as UnlockClassArgs;
// Validation
if (!class_name || !lock_handle) {
return return_error(new Error('class_name and lock_handle are required'));
}
const client = new AdtClient(connection);
const className = class_name.toUpperCase();
logger?.info(`Starting class unlock: ${className}`);
try {
// Unlock class
const unlockState = await client
.getClass()
.unlock({ className }, lock_handle);
const unlockResult = unlockState.unlockResult;
if (!unlockResult) {
throw new Error(
`Unlock did not return a response for class ${className}`,
);
}
logger?.info(`✅ UnlockClass completed: ${className}`);
return return_response({
data: JSON.stringify(
{
success: true,
class_name: className,
message: `Class ${className} unlocked successfully.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error unlocking class ${className}: ${error?.message || error}`,
);
// Parse error message
let errorMessage = `Failed to unlock class: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Class ${className} not found.`;
} else if (error.response?.status === 400) {
errorMessage = `Invalid lock handle. Make sure you're using the same lock_handle from LockClass.`;
} 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);
}
}
