import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
import { IRequestStrategy } from './IRequestStrategy';
import { IRequestHandlerDependencies, PromptDefinition } from '../interfaces/IRequestHandlerServices';
import { logger } from '../../utils/logger';
interface PromptsListRequest {
method: string;
params?: {
category?: string;
};
}
interface PromptsListResponse {
prompts: PromptDefinition[];
}
/**
* Strategy for handling prompts list requests
* Follows Strategy Pattern for clean request handling
*/
export class PromptsListStrategy implements IRequestStrategy<PromptsListRequest, PromptsListResponse> {
constructor(
private dependencies: IRequestHandlerDependencies
) {}
canHandle(request: PromptsListRequest): boolean {
return request.method === 'prompts/list';
}
async handle(request: PromptsListRequest): Promise<PromptsListResponse> {
try {
const category = request.params?.category;
if (category) {
return await this.dependencies.promptsListService.listPromptsByCategory(category);
} else {
return await this.dependencies.promptsListService.listPrompts();
}
} catch (error) {
if (error instanceof McpError) {
throw error;
}
logger.systemError(error as Error, 'PromptsListStrategy');
throw new McpError(ErrorCode.InternalError, 'Failed to list prompts', error);
}
}
}
