import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
import {
GetPackageReadmeParams,
GetPackageInfoParams,
SearchPackagesParams,
} from '../types/index.js';
export class ParameterValidator {
static validateGetPackageReadmeParams(args: unknown): GetPackageReadmeParams {
if (!args || typeof args !== 'object') {
throw new McpError(
ErrorCode.InvalidParams,
'Arguments must be an object'
);
}
const params = args as Record<string, unknown>;
if (!params.package_name || typeof params.package_name !== 'string') {
throw new McpError(
ErrorCode.InvalidParams,
'package_name is required and must be a string in groupId:artifactId format'
);
}
if (params.version !== undefined && typeof params.version !== 'string') {
throw new McpError(
ErrorCode.InvalidParams,
'version must be a string'
);
}
if (params.include_examples !== undefined && typeof params.include_examples !== 'boolean') {
throw new McpError(
ErrorCode.InvalidParams,
'include_examples must be a boolean'
);
}
const result: GetPackageReadmeParams = {
package_name: params.package_name,
};
if (params.version !== undefined) {
result.version = params.version as string;
}
if (params.include_examples !== undefined) {
result.include_examples = params.include_examples as boolean;
}
return result;
}
static validateGetPackageInfoParams(args: unknown): GetPackageInfoParams {
if (!args || typeof args !== 'object') {
throw new McpError(
ErrorCode.InvalidParams,
'Arguments must be an object'
);
}
const params = args as Record<string, unknown>;
if (!params.package_name || typeof params.package_name !== 'string') {
throw new McpError(
ErrorCode.InvalidParams,
'package_name is required and must be a string in groupId:artifactId format'
);
}
if (params.include_dependencies !== undefined && typeof params.include_dependencies !== 'boolean') {
throw new McpError(
ErrorCode.InvalidParams,
'include_dependencies must be a boolean'
);
}
if (params.include_dev_dependencies !== undefined && typeof params.include_dev_dependencies !== 'boolean') {
throw new McpError(
ErrorCode.InvalidParams,
'include_dev_dependencies must be a boolean'
);
}
const result: GetPackageInfoParams = {
package_name: params.package_name,
};
if (params.include_dependencies !== undefined) {
result.include_dependencies = params.include_dependencies as boolean;
}
if (params.include_dev_dependencies !== undefined) {
result.include_dev_dependencies = params.include_dev_dependencies as boolean;
}
return result;
}
static validateSearchPackagesParams(args: unknown): SearchPackagesParams {
if (!args || typeof args !== 'object') {
throw new McpError(
ErrorCode.InvalidParams,
'Arguments must be an object'
);
}
const params = args as Record<string, unknown>;
if (!params.query || typeof params.query !== 'string') {
throw new McpError(
ErrorCode.InvalidParams,
'query is required and must be a string'
);
}
if (params.limit !== undefined) {
if (typeof params.limit !== 'number' || params.limit < 1 || params.limit > 250) {
throw new McpError(
ErrorCode.InvalidParams,
'limit must be a number between 1 and 250'
);
}
}
if (params.quality !== undefined) {
if (typeof params.quality !== 'number' || params.quality < 0 || params.quality > 1) {
throw new McpError(
ErrorCode.InvalidParams,
'quality must be a number between 0 and 1'
);
}
}
if (params.popularity !== undefined) {
if (typeof params.popularity !== 'number' || params.popularity < 0 || params.popularity > 1) {
throw new McpError(
ErrorCode.InvalidParams,
'popularity must be a number between 0 and 1'
);
}
}
const result: SearchPackagesParams = {
query: params.query,
};
if (params.limit !== undefined) {
result.limit = params.limit as number;
}
if (params.quality !== undefined) {
result.quality = params.quality as number;
}
if (params.popularity !== undefined) {
result.popularity = params.popularity as number;
}
return result;
}
}
