import { ValidationOptions } from "../ValidationOptions";
import { buildMessage, ValidateBy } from "../common/ValidateBy";
import validator from "validator";

export const CONTAINS = "contains";

/**
 * Checks if the string contains the seed.
 * If given value is not a string, then it returns false.
 */
export function contains(value: unknown, seed: string): boolean {
    return typeof value === "string" && validator.contains(value, seed);
}

/**
 * Checks if the string contains the seed.
 * If given value is not a string, then it returns false.
 */
export function Contains(seed: string, validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: CONTAINS,
            constraints: [seed],
            validator: {
                validate: (value, args): boolean => contains(value, args.constraints[0]),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property must contain a $constraint1 string",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}