/**
* CreateFunctionModule Handler - Create ABAP Function Module
*
* Uses AdtClient.createFunctionModule 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: 'CreateFunctionModuleLow',
description:
'[low-level] Create a new ABAP function module. - use CreateFunctionModule (high-level) for full workflow with validation, lock, update, check, unlock, and activate.',
inputSchema: {
type: 'object',
properties: {
function_module_name: {
type: 'string',
description: 'Function module name (e.g., Z_MY_FUNCTION).',
},
function_group_name: {
type: 'string',
description: 'Function group name (e.g., ZFG_MY_GROUP).',
},
description: {
type: 'string',
description: 'Function module description.',
},
package_name: {
type: 'string',
description: 'Package name (e.g., ZOK_LOCAL, $TMP for local objects).',
},
transport_request: {
type: 'string',
description:
'Transport request number (e.g., E19K905635). Required for transportable packages.',
},
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',
'description',
'package_name',
],
},
} as const;
interface CreateFunctionModuleArgs {
function_module_name: string;
function_group_name: string;
description: string;
package_name: string;
transport_request?: string;
session_id?: string;
session_state?: {
cookies?: string;
csrf_token?: string;
cookie_store?: Record<string, string>;
};
}
/**
* Main handler for CreateFunctionModule MCP tool
*
* Uses AdtClient.createFunctionModule - low-level single method call
*/
export async function handleCreateFunctionModule(
context: HandlerContext,
args: CreateFunctionModuleArgs,
) {
const { connection, logger } = context;
try {
const {
function_module_name,
function_group_name,
description,
package_name,
transport_request,
session_id,
session_state,
} = args as CreateFunctionModuleArgs;
// Validation
if (
!function_module_name ||
!function_group_name ||
!description ||
!package_name
) {
return return_error(
new Error(
'function_module_name, function_group_name, description, and package_name 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 creation: ${functionModuleName} in ${functionGroupName}`,
);
try {
// Create function module
await client.getFunctionModule().create({
functionModuleName,
functionGroupName,
description,
packageName: package_name,
sourceCode: '',
transportRequest: transport_request,
});
try {
await client
.getFunctionModule()
.read({ functionModuleName, functionGroupName }, 'inactive', {
withLongPolling: true,
});
} catch (_readError: any) {
// Read is best-effort; create may still succeed without immediate read.
}
// Get updated session state after create
logger?.info(`✅ CreateFunctionModule completed: ${functionModuleName}`);
return return_response({
data: JSON.stringify(
{
success: true,
function_module_name: functionModuleName,
function_group_name: functionGroupName,
description,
package_name: package_name,
transport_request: transport_request || null,
session_id: session_id || null,
session_state: null, // Session state management is now handled by auth-broker,
message: `Function module ${functionModuleName} created successfully. Use LockFunctionModule and UpdateFunctionModule to add source code, then UnlockFunctionModule and ActivateObject.`,
},
null,
2,
),
} as AxiosResponse);
} catch (error: any) {
logger?.error(
`Error creating function module ${functionModuleName}: ${error?.message || error}`,
);
const responseData =
typeof error.response?.data === 'string'
? error.response.data
: error.response?.data
? JSON.stringify(error.response.data)
: '';
const responseSnippet = responseData
? responseData.slice(0, 1000)
: undefined;
if (responseSnippet) {
logger?.warn(
`CreateFunctionModule returned HTTP ${error.response?.status} for ${functionModuleName}. Response: ${responseSnippet}`,
);
}
// Parse error message
let errorMessage = `Failed to create function module: ${error.message || String(error)}`;
if (error.response?.status === 409) {
errorMessage = `Function module ${functionModuleName} already exists.`;
} 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);
}
}
