nowjs-core/lib/validation/validators/RequiredValidator.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 });
require("reflect-metadata");
const index_1 = require("../index");
exports.VALIDATOR_REQUIRED_METADATA_KEY = Symbol('validation:validator:isRequired');
function isRequired(errorMessage) {
    return (target, propertyKey, descriptor) => {
        const original = descriptor.value;
        Reflect.defineMetadata(exports.VALIDATOR_REQUIRED_METADATA_KEY, null, target, propertyKey);
        Reflect.defineMetadata(index_1.VALIDATOR_METADATA_KEY, new RequiredValidator(errorMessage), target, propertyKey);
    };
}
exports.isRequired = isRequired;
class RequiredValidator extends index_1.ValidatorBase {
    constructor(errorMessage = 'The ${DisplayName} is required.') {
        super('Required', errorMessage);
    }
    validate(context) {
        if (context.Value === undefined ||
            context.Value === null ||
            (typeof context.Value === 'string' && context.Value === '')) {
            return Promise.reject(new index_1.ValidatorException(this.Name, context.Target, context.PropertyName, this.formatErrorMessage(context)));
        }
        else {
            return Promise.resolve(true);
        }
    }
}
exports.RequiredValidator = RequiredValidator;