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