react-native-validation/src/rules.js

A simple validation library for react native

const validations = {
  matchRegexp: (value, regexp) => {
    const validationRegexp = regexp instanceof RegExp ? regexp : new RegExp(regexp);
    return validations.isEmpty(value) || validationRegexp.test(value);
  },

  isEmail: value =>
    validations.matchRegexp(
      value,
      /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i,
    ),

  isExisty: value => value !== null && value !== undefined,

  isEmpty: value => {
    if (value instanceof Array) {
      return value.length === 0;
    }
    return value === "" || !validations.isExisty(value);
  },

  required: value => !validations.isEmpty(value),

  isNumber: value => validations.matchRegexp(value, /^-?[0-9]\d*(\d+)?$/i),

  isFloat: value => validations.matchRegexp(value, /^[+-]?([0-9]*[.])?[0-9]+$/i),

  isPositive: value => {
    if (validations.isExisty(value)) {
      return (validations.isNumber(value) || validations.isFloat(value)) && value >= 0;
    }
    return true;
  },

  maxNumber: (value, max) => validations.isEmpty(value) || parseInt(value, 10) <= parseInt(max, 10),

  minNumber: (value, min) => validations.isEmpty(value) || parseInt(value, 10) >= parseInt(min, 10),

  maxFloat: (value, max) => validations.isEmpty(value) || parseFloat(value) <= parseFloat(max),

  minFloat: (value, min) => validations.isEmpty(value) || parseFloat(value) >= parseFloat(min),

  isString: value => !validations.isEmpty(value) || typeof value === "string" || value instanceof String,

  minStringLength: (value, length) => validations.isString(value) && value.length >= length,

  maxStringLength: (value, length) => validations.isString(value) && value.length <= length,
};

export default validations;