/**
* UnlockStructure Handler - Unlock ABAP Structure
*
* Uses AdtClient.unlockStructure 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: 'UnlockStructureLow',
description:
'[low-level] Unlock an ABAP structure after modification. Must use the same session_id and lock_handle from LockStructure operation.',
inputSchema: {
type: 'object',
properties: {
structure_name: {
type: 'string',
description: 'Structure name (e.g., Z_MY_PROGRAM).',
},
lock_handle: {
type: 'string',
description: 'Lock handle from LockStructure operation.',
},
session_id: {
type: 'string',
description:
'Session ID from LockStructure operation. Must be the same as used in LockStructure.',
},
session_state: {
type: 'object',
description:
'Session state from LockStructure (cookies, csrf_token, cookie_store). Required if session_id is provided.',
properties: {
cookies: { type: 'string' },
csrf_token: { type: 'string' },
cookie_store: { type: 'object' },
},
},
},
required: ['structure_name', 'lock_handle', 'session_id'],
},
} as const;
interface UnlockStructureArgs {
structure_name: string;
lock_handle: string;
session_id: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for UnlockStructure MCP tool
*
* Uses AdtClient.unlockStructure - low-level single method call
*/
export async function handleUnlockStructure(
context: HandlerContext,
args: UnlockStructureArgs,
) {
const { connection, logger } = context;
try {
const { structure_name, lock_handle, session_id, session_state } =
args as UnlockStructureArgs;
// Validation
if (!structure_name || !lock_handle || !session_id) {
return return_error(
new Error('structure_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);
} else {
// Ensure connection is established
}
const structureName = structure_name.toUpperCase();
logger?.info(
`Starting structure unlock: ${structureName} (session: ${session_id.substring(0, 8)}...)`,
);
try {
// Unlock structure
const unlockState = await client
.getStructure()
.unlock({ structureName: structureName }, lock_handle);
const unlockResult = unlockState.unlockResult;
if (!unlockResult) {
throw new Error(
`Unlock did not return a response for structure ${structureName}`,
);
}
// Get updated session state after unlock
logger?.info(`✅ UnlockStructure completed: ${structureName}`);
return return_response({
data: JSON.stringify(
{
success: true,
structure_name: structureName,
session_id: session_id,
session_state: null, // Session state management is now handled by auth-broker,
message: `Structure ${structureName} unlocked successfully.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(`Error unlocking structure ${structureName}:`, error);
// Parse error message
let errorMessage = `Failed to unlock structure: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Structure ${structureName} 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 LockStructure.`;
} 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);
}
}
