/**
* UnlockMetadataExtension Handler - Unlock ABAP MetadataExtension
*
* Uses AdtClient.unlockMetadataExtension 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,
restoreSessionInConnection,
return_error,
return_response,
} from '../../../lib/utils';
export const TOOL_DEFINITION = {
name: 'UnlockMetadataExtensionLow',
description:
'[low-level] Unlock an ABAP metadata extension after modification. Must use the same session_id and lock_handle from LockMetadataExtension operation.',
inputSchema: {
type: 'object',
properties: {
objName: {
type: 'string',
description: 'MetadataExtension name (e.g., Z_MY_PROGRAM).',
},
lock_handle: {
type: 'string',
description: 'Lock handle from LockMetadataExtension operation.',
},
session_id: {
type: 'string',
description:
'Session ID from LockMetadataExtension operation. Must be the same as used in LockMetadataExtension.',
},
session_state: {
type: 'object',
description:
'Session state from LockMetadataExtension (cookies, csrf_token, cookie_store). Required if session_id is provided.',
properties: {
cookies: { type: 'string' },
csrf_token: { type: 'string' },
cookie_store: { type: 'object' },
},
},
},
required: ['name', 'lock_handle', 'session_id'],
},
} as const;
interface UnlockMetadataExtensionArgs {
name: string;
lock_handle: string;
session_id: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for UnlockMetadataExtension MCP tool
*
* Uses AdtClient.unlockMetadataExtension - low-level single method call
*/
export async function handleUnlockMetadataExtension(
context: HandlerContext,
args: UnlockMetadataExtensionArgs,
) {
const { connection, logger } = context;
try {
const { name, lock_handle, session_id, session_state } =
args as UnlockMetadataExtensionArgs;
// Validation
if (!name || !lock_handle || !session_id) {
return return_error(
new Error('name, lock_handle, and session_id are required'),
);
}
const client = new AdtClient(connection);
// Restore session state if provided
if (session_state) {
await restoreSessionInConnection(connection, session_id, session_state);
}
const ddlxName = name.toUpperCase();
logger?.info(
`Starting metadata extension unlock: ${ddlxName} (session: ${session_id.substring(0, 8)}...)`,
);
try {
// Unlock metadata extension
const unlockState = await client
.getMetadataExtension()
.unlock({ name: ddlxName }, lock_handle);
const unlockResult = unlockState.unlockResult;
if (!unlockResult) {
throw new Error(
`Unlock did not return a response for metadata extension ${ddlxName}`,
);
}
// Get updated session state after unlock
logger?.info(`✅ UnlockMetadataExtension completed: ${ddlxName}`);
return return_response({
data: JSON.stringify(
{
success: true,
name: ddlxName,
session_id: session_id,
session_state: null, // Session state management is now handled by auth-broker,
message: `MetadataExtension ${ddlxName} unlocked successfully.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error unlocking metadata extension ${ddlxName}: ${error?.message || error}`,
);
// Parse error message
let errorMessage = `Failed to unlock metadata extension: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `MetadataExtension ${ddlxName} not found.`;
} else if (error.response?.status === 400) {
errorMessage = `Invalid lock handle or session. Make sure you're using the same session_id and lock_handle from LockMetadataExtension.`;
} 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);
}
}
