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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import AjvPkg from 'ajv';
// Ajv's ESM/CJS interop: use 'any' for compatibility as recommended by Ajv docs
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const AjvClass = (AjvPkg as any).default || AjvPkg;
const ajValidator = new AjvClass();
/**
* Simple utility to validate objects against JSON Schemas
*/
export class SchemaValidator {
/**
* Returns null if the data confroms to the schema described by schema (or if schema
* is null). Otherwise, returns a string describing the error.
*/
static validate(schema: unknown | undefined, data: unknown): string | null {
if (!schema) {
return null;
}
if (typeof data !== 'object' || data === null) {
return 'Value of params must be an object';
}
const validate = ajValidator.compile(schema);
const valid = validate(data);
if (!valid && validate.errors) {
return ajValidator.errorsText(validate.errors, { dataVar: 'params' });
}
return null;
}
}
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