@cfworker/json-schema/src/validator.ts

A JSON schema validator that will run on Cloudflare workers. Supports drafts 4, 7, 2019-09, and 2020-12.

import { dereference } from './dereference.js';
import { Schema, SchemaDraft, ValidationResult } from './types.js';
import { validate } from './validate.js';

export class Validator {
  private readonly lookup: ReturnType<typeof dereference>;

  constructor(
    private readonly schema: Schema | boolean,
    private readonly draft: SchemaDraft = '2019-09',
    private readonly shortCircuit = true
  ) {
    this.lookup = dereference(schema);
  }

  public validate(instance: any): ValidationResult {
    return validate(
      instance,
      this.schema,
      this.draft,
      this.lookup,
      this.shortCircuit
    );
  }

  public addSchema(schema: Schema, id?: string): void {
    if (id) {
      schema = { ...schema, $id: id };
    }
    dereference(schema, this.lookup);
  }
}