@mojojs/core/lib/validator.js

Real-time web framework

import { ValidatorResult } from './validator/result.js';
import Ajv from 'ajv';
/**
 * JSON schema validator class.
 */
export class Validator {
    constructor() {
        this._ajv = new Ajv({ coerceTypes: 'array' });
    }
    /**
     * Add JSON schema.
     */
    addSchema(schema, name) {
        this._ajv.addSchema(schema, name);
    }
    /**
     * Get JSON schema validation function.
     */
    schema(schema) {
        const ajv = this._ajv;
        let validate;
        if (typeof schema === 'string') {
            validate = ajv.getSchema(schema);
        }
        else if (schema.$id !== undefined) {
            if ((validate = ajv.getSchema(schema.$id)) === undefined)
                validate = ajv.compile(schema);
        }
        else {
            validate = ajv.compile(schema);
        }
        if (validate === undefined)
            throw new Error(`Invalid schema: ${schema}`);
        return function (data) {
            const isValid = validate(data);
            const errors = [];
            const results = validate.errors;
            if (results != null) {
                for (const error of results) {
                    errors.push({ instancePath: error.instancePath, schemaPath: error.schemaPath, message: error.message });
                }
            }
            return new ValidatorResult(isValid, errors);
        };
    }
}
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