/**
* UpdateFunctionModule Handler - Update ABAP Function Module Source Code
*
* Uses AdtClient.updateFunctionModule 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: 'UpdateFunctionModuleLow',
description:
'[low-level] Update source code of an existing ABAP function module. Requires lock handle from LockObject and function group name. - use UpdateFunctionModule (high-level) for full workflow with lock/unlock/activate.',
inputSchema: {
type: 'object',
properties: {
function_module_name: {
type: 'string',
description:
'Function module name (e.g., Z_TEST_FM). Function module must already exist.',
},
function_group_name: {
type: 'string',
description:
'Function group name containing the function module (e.g., Z_TEST_FG).',
},
source_code: {
type: 'string',
description: 'Complete ABAP function module source code.',
},
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: [
'function_module_name',
'function_group_name',
'source_code',
'lock_handle',
],
},
} as const;
interface UpdateFunctionModuleArgs {
function_module_name: string;
function_group_name: string;
source_code: string;
lock_handle: string;
session_id?: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for UpdateFunctionModule MCP tool
*
* Uses AdtClient.updateFunctionModule - low-level single method call
*/
export async function handleUpdateFunctionModule(
context: HandlerContext,
args: UpdateFunctionModuleArgs,
) {
const { connection, logger } = context;
try {
const {
function_module_name,
function_group_name,
source_code,
lock_handle,
session_id,
session_state,
} = args as UpdateFunctionModuleArgs;
// Validation
if (
!function_module_name ||
!function_group_name ||
!source_code ||
!lock_handle
) {
return return_error(
new Error(
'function_module_name, function_group_name, source_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 functionModuleName = function_module_name.toUpperCase();
const functionGroupName = function_group_name.toUpperCase();
logger?.info(
`Starting function module update: ${functionModuleName} in ${functionGroupName}`,
);
try {
// Update function module with source code
const updateState = await client.getFunctionModule().update(
{
functionModuleName: functionModuleName,
functionGroupName: functionGroupName,
sourceCode: source_code,
},
{ lockHandle: lock_handle },
);
const updateResult = updateState.updateResult;
if (!updateResult) {
throw new Error(
`Update did not return a response for function module ${functionModuleName}`,
);
}
// Get updated session state after update
logger?.info(`✅ UpdateFunctionModule completed: ${functionModuleName}`);
return return_response({
data: JSON.stringify(
{
success: true,
function_module_name: functionModuleName,
function_group_name: functionGroupName,
lock_handle: lock_handle,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: `Function module ${functionModuleName} updated successfully. Remember to unlock using UnlockObject.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error updating function module ${functionModuleName}: ${error?.message || error}`,
);
// Parse error message
let errorMessage = `Failed to update function module: ${error.message || String(error)}`;
if (error.response?.status === 404) {
errorMessage = `Function module ${functionModuleName} not found.`;
} else if (error.response?.status === 423) {
errorMessage = `Function module ${functionModuleName} 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);
}
}
