import { App } from 'obsidian';
import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
import { IRequestStrategy } from './IRequestStrategy';
import { IRequestHandlerDependencies } from '../interfaces/IRequestHandlerServices';
import { logger } from '../../utils/logger';
interface ResourceListRequest {
method: string;
params?: {
pathPrefix?: string;
};
}
interface ResourceListResponse {
resources: Array<{
uri: string;
name: string;
mimeType: string;
}>;
}
/**
* Strategy for handling resource list requests
* Follows Strategy Pattern for clean request handling
*/
export class ResourceListStrategy implements IRequestStrategy<ResourceListRequest, ResourceListResponse> {
constructor(
private dependencies: IRequestHandlerDependencies,
private app: App
) {}
canHandle(request: ResourceListRequest): boolean {
return request.method === 'resources/list';
}
async handle(request: ResourceListRequest): Promise<ResourceListResponse> {
try {
const pathPrefix = request.params?.pathPrefix;
if (pathPrefix) {
return await this.dependencies.resourceListService.listResourcesByPath(pathPrefix);
} else {
return await this.dependencies.resourceListService.listResources();
}
} catch (error) {
if (error instanceof McpError) {
throw error;
}
logger.systemError(error as Error, 'ResourceListStrategy');
throw new McpError(ErrorCode.InternalError, 'Failed to list resources', error);
}
}
}
