/**
* UpdateStructure Handler - Update ABAP Structure DDL Source
*
* Uses AdtClient.updateStructure 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: 'UpdateStructureLow',
description:
'[low-level] Update DDL source code of an existing ABAP structure. Requires lock handle from LockObject. - use UpdateStructureSource for full workflow with lock/unlock.',
inputSchema: {
type: 'object',
properties: {
structure_name: {
type: 'string',
description:
'Structure name (e.g., ZZ_S_TEST_001). Structure must already exist.',
},
ddl_code: {
type: 'string',
description: 'Complete DDL source code for the structure definition.',
},
lock_handle: {
type: 'string',
description:
'Lock handle from LockObject. Required for update operation.',
},
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: ['structure_name', 'ddl_code', 'lock_handle'],
},
} as const;
interface UpdateStructureArgs {
structure_name: string;
ddl_code: string;
lock_handle: string;
session_id?: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for UpdateStructure MCP tool
*
* Uses AdtClient.updateStructure - low-level single method call
*/
export async function handleUpdateStructure(
context: HandlerContext,
args: UpdateStructureArgs,
) {
const { connection, logger } = context;
try {
const { structure_name, ddl_code, lock_handle, session_id, session_state } =
args as UpdateStructureArgs;
// Validation
if (!structure_name || !ddl_code || !lock_handle) {
return return_error(
new Error('structure_name, ddl_code, and lock_handle 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 structureName = structure_name.toUpperCase();
logger?.info(`Starting structure update: ${structureName}`);
try {
// Update structure with DDL code
const updateState = await client
.getStructure()
.update(
{ structureName: structureName, ddlCode: ddl_code },
{ lockHandle: lock_handle },
);
const updateResult = updateState.updateResult;
if (!updateResult) {
throw new Error(
`Update did not return a response for structure ${structureName}`,
);
}
// Get updated session state after update
logger?.info(`✅ UpdateStructure completed: ${structureName}`);
return return_response({
data: JSON.stringify(
{
success: true,
structure_name: structureName,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: `Structure ${structureName} updated successfully. Remember to unlock using UnlockObject.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(`Error updating structure ${structureName}:`, error);
// Parse error message
let errorMessage = `Failed to update structure: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Structure ${structureName} not found.`;
} else if (error.response?.status === 423) {
errorMessage = `Structure ${structureName} is locked by another user or lock handle is invalid.`;
} 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);
}
}
