Input check

Project base on indicative

Validator for nodejs and web.

Installation

Installing requires node 4.0 or greater with npm installed.

npm install --save input-check

Basics

const inputCheck = require('input-check')

validate (data, rules, [messages])

Validate method will run the validation cycle, which gets terminated on the first error.

const rules = {
  username: 'required'
}

const data = {
  username: null
}

inputCheck
.validate(data, rules)
.then(function () {
  // validation passed
})
.catch(function (errors) {
  // validation failed
})

Custom messages

const messages = {
  required: 'This field is required to complete the registration process.'
}

inputCheck
.validate(data, rules, messages)
.then(function () {
  // validation passed
})
.catch(function (errors) {
  // validation failed
})

Custom Validation

const _ = require('lodash');

const unique = function (data, field, message, args) {

  return new Promise(function (resolve, reject) {

    // get value of field under validation
    const fieldValue = _.get(data, field);

    // resolve if value does not exists, value existence
    // should be taken care by required rule.
    if(!fieldValue) {
      return resolve('validation skipped');
    }

    // checking for username inside database
    User
    .where('username', fieldValue)
    .then(function (result) {
      if(result){
        reject(message);
      }else{
        resolve('username does not exists');
      }
    });
    .catch(resolve);

  });

};

• data - It is the actual data object passed to validate method.
• field - Field is a string value of field under validation.
• message - Error message to return.
• args - An array of values your rule is expecting, it may be empty depending upon your rule expectations. For example min:4 will have args array as [4].

inputCheck.extend('unique', unique, 'Field should be unique')

Available Validation Rules

Below is a list of all available validation rules and their function:

accepted

The field under validation must be yes, on, 1, or true. This is useful for validating "Terms of Service" acceptance.

active_url

The field under validation must have a valid A or AAAA record.

after:(date|time)

The field under validation must be a value after a given date or time.

const rules = {
  'createdAt'  : 'date|after:2016-11-11',
  'time'  : 'time|after:14:00:00'
}

after_or_equal:date

The field under validation must be a value after or equal to the given date. For more information, see the after rule.

alpha

The field under validation must be entirely alphabetic characters.

alpha_dash

The field under validation may have alpha-numeric characters, as well as dashes and underscores.

alpha_num

The field under validation must be entirely alpha-numeric characters.

array

The field under validation must be a array.

before:date

The field under validation must be a value preceding the given date or time.

const rules = {
  'createdAt'  : 'date|before:2016-11-11',
  'time'  : 'time|before:14:00:00'
}

before_or_equal:date

The field under validation must be a value preceding or equal to the given date. The dates will be passed into the momentjs function.

between:min,max

The field under validation must have a size between the given min and max.

Strings, numerics, and array size rule.

Warning: Not support File type.

boolean

The field under validation must be able to be cast as a boolean. Accepted input are true, false, 1, 0, "1", and "0".

confirmed

The field under validation must have a matching field of foo_confirmation. For example, if the field under validation is password, a matching password_confirmation field must be present in the input.

date

The field under validation must be a valid date according to the momentjs function.

date_format:format

The field under validation must match the given format. You should use either date or date_format when validating a field, not both.

different:field

The field under validation must have a different value than field.

digits:value

The field under validation must be numeric and must have an exact length of value.

digits_between:min,max

The field under validation must have a length between the given min and max.

distinct

When working with arrays, the field under validation must not have any duplicate values.

email

The field under validation must be formatted as an e-mail address.

filled

The field under validation must not be empty when it is present.

in:foo,bar,... (in_array)

The field under validation must be included in the given list of values. Since this rule often requires you to implode an array.

const rules = {
  'company'  : 'string|in:google,yahoo,facebook',
}

in array example:

const rules = {
  'company.*'  : 'in:google,yahoo,facebook',
}

not_in:foo,bar,...

The field under validation must not be included in the given list of values.

integer

The field under validation must be an integer.

ip

The field under validation must be an IP address.

ipv4

The field under validation must be an IPv4 address.

ipv6

The field under validation must be an IPv6 address.

json

The field under validation must be a valid JSON string.

min:value

The field under validation must have a minimum value.

Strings, numerics, and array size rule.

Warning: Not support File type.

max:value

The field under validation must be less than or equal to a maximum value. Strings, numerics, and array size rule.

Warning: Not support File type.

nullable

The field under validation may be null. This is particularly useful when validating primitive such as strings and integers that can contain null values.

numeric

The field under validation must be numeric.

present

The field under validation must be present in the input data but can be empty.

regex:pattern

The field under validation must match the given regular expression.

Note: When using the regex pattern, it may be necessary to specify rules in an array instead of using pipe delimiters, especially if the regular expression contains a pipe character.

required

The field under validation must be present in the input data and not empty. A field is considered "empty" if one of the following conditions are true:

The value is null. The value is an empty string. The value is an empty array or empty Countable object. The value is an uploaded file with no path.

required_if:anotherfield,value,...

The field under validation must be present and not empty if the anotherfield field is equal to any value.

required_unless:anotherfield,value,...

The field under validation must be present and not empty unless the anotherfield field is equal to any value.

required_with:foo,bar,...

The field under validation must be present and not empty only if any of the other specified fields are present.

required_with_all:foo,bar,...

The field under validation must be present and not empty only if all of the other specified fields are present.

required_without:foo,bar,...

The field under validation must be present and not empty only when any of the other specified fields are not present.

required_without_all:foo,bar,...

The field under validation must be present and not empty only when all of the other specified fields are not present.

same:field

The given field must match the field under validation.

size:value

The field under validation must have a size matching the given value. For string data, value corresponds to the number of characters. For numeric data, value corresponds to a given integer value. For an array, size corresponds to the count of the array. For files, size corresponds to the file size in kilobytes.

string

The field under validation must be a string. If you would like to allow the field to also be null, you should assign the nullable rule to the field.

timezone

The field under validation must be a valid timezone identifier according to the momentjs timezone function.

exists:table,column

The field under validation must exist on a given database table.

unique:table,column,except,idColumn

The field under validation must be unique in a given database table. If the column option is not specified, the field name will be used.

url

The field under validation must be a valid URL.

Different With Laravel Validation

time

The field under validation must be a valid Time. Support format: HH:mm:ss, HH:mm, HH:mm a

object

The field under validation must be a valid object.

uuid

The field under validation must be a valid uuid.

includes:foo

The field under validation must be within value.

starts_with:foo

The field under validation must be start within value.

ends_with:foo

The field under validation must be end within value.

File & Image

handle multipart bodies

you may be interested in the following modules:

• formidable
• multer When you using above modules, you could get the file or image information. Then, you must to transfer information below before use file validation:

const rules = {
  file: 'file|image'
}

const data = {
  file: {
      mimetype: 'image/png', // for mime type validation 
      path: '/var/tmp/xxxx.png', // for dimensions 
  }
}

inputCheck
.validate(data, rules)
.then(function () {
  // validation passed
})
.catch(function (errors) {
  // validation failed
})

file

The field under validation must be a successfully uploaded file.

image

The file under validation must be an image (jpeg, png, bmp, gif, or svg)

const rules = {
  'file'  : 'image',
}

mimetypes:text/plain,...

The file under validation must match one of the given MIME types:

mimes:foo,bar,...

The file under validation must have a MIME type corresponding to one of the listed extensions.

dimensions

The file under validation must be an image meeting the dimension constraints as specified by the rule's parameters:

const rules = {
  'image'  : 'dimensions:min_width=100,min_height=200,ratio=3/2',
}

Available constraints are: min_width, max_width, min_height, max_height, width, height, ratio.

License

The MIT License

• Copyright (c) Harminder Virk [email protected]
• Copyright (c) Devmark [email protected]