import { ValidationError, validate } from 'class-validator';
import { plainToClass } from 'class-transformer';

export class Validator {
	public validationErrors!: ValidationError[];

	constructor(
		private readonly validationCtor: new (...args: any[]) => object,
		public formData: {}
	) {
		this.validationErrors = [];
	}

	public async validate(): Promise<boolean> {
		const obj = plainToClass(this.validationCtor, this.formData);
		this.validationErrors = await validate(obj);

		if (this.validationErrors.length === 0) {
			return true;
		}
		return false;
	}

	public errorArrayHas(type: string): boolean {
		return this.validationErrors.reduce((acc: boolean, val: ValidationError) => {
			if (val.property === type) {
				return true;
			}
			return acc;
		}, false);
	}

}