nowjs-core/lib/validation/validators/JsonValidator.js

NowCanDo Javascript Core [nowjs-core] is a library written by TypeScript code maintains under Apache 2.0 licence

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const index_1 = require("../index");
exports.VALIDATOR_JSON_METADATA_KEY = Symbol('validation:validator:isJson');
function isJson(errorMessage) {
    return (target, propertyKey, descriptor) => {
        const original = descriptor.value;
        Reflect.defineMetadata(exports.VALIDATOR_JSON_METADATA_KEY, null, target, propertyKey);
        Reflect.defineMetadata(index_1.VALIDATOR_METADATA_KEY, new JsonValidator(errorMessage), target, propertyKey);
    };
}
exports.isJson = isJson;
class JsonValidator extends index_1.ValidatorBase {
    constructor(errorMessage = 'The value of ${DisplayName} must have valu type: ${ValueType} .') {
        super('Json', errorMessage);
    }
    isMatch(value) {
        try {
            return JSON.parse(value) !== null;
        }
        catch (error) {
            return false;
        }
    }
    validate(context) {
        if (context.Value === undefined || context.Value === null) {
            return Promise.resolve(true);
        }
        if (!this.isMatch(context.Value)) {
            return Promise.reject(new index_1.ValidatorException(this.Name, context.Target, context.PropertyName, this.formatErrorMessage(context)));
        }
        return Promise.resolve(true);
    }
}
exports.JsonValidator = JsonValidator;