datautils

DataUtils JS

Some JavaScript data utilities

Installation

Installation via NPM is very simple

npm install datautils

Once you've done that, you can access this using the require statement.

var datautils = require('datautils');

Documentation

Data

• setArray
• setBool
• setDate
• setFloat
• setFunction
• setInstanceOf
• setInt
• setObject
• setRegex
• setString

Data

The data methods all work in fundamentally the same way - you pass in some raw input as the first parameter and a default value as the second. If the first parameter fulfils the criteria of the method, it return that otherwise it returns the default value.

### _mixed_ setArray(_mixed_ input, _mixed_ def)

Ensures that the input is an array

### _mixed_ setBool(_mixed_ input, _mixed_ def)

Ensures the the input is a boolean (true/false). It also casts it to a boolean if the following criteria:

• true:
  • String: (upper and lower case): Y, 1, TRUE, T, YES
  • Number: 1
  • Boolean: true
• false:
  • String: (upper and lower case): N, 1, FALSE, F, NO
  • Number: 0
  • Boolean: false

### _mixed_ setDate(_mixed_ input, _mixed_ def)

Ensures that the input is an instance of the Date object. Can take in either a Date object or a string that matches the ISO8601 format.

### _mixed_ setFloat(_mixed_ input, _mixed_ def)

Ensures that input is a floating point number. This can receive either a number or a numerical string.

### _mixed_ setFunction(_mixed_ input, _mixed_ def)

Ensures that the input a function

### _mixed_ setInstanceOf(_mixed_ input, _function_ instance, _mixed_ def)

Ensures that the input is an instance of the instance. The instance must be a function. This function can be injected into this method.

### _mixed_ setInt(_mixed_ input, _mixed_ def)

Ensures that the input is an integer. This can be either a string, or a number. In reality, this pushes it to the JavaScript Number object (which can be made to be a floating point number. However, this function ensures that value that is returned it an integer. If you pass over Number(1) or String(3.0), they are returned as Number(1) and Number(3). However, if you pass in Number(1.2) or String(2.4), the default value will be returned.

### _string_ setRegex(_string|RegExp_ regex, _string_ input, _mixed_ def)

Makes sure that the input matches the given regular expression. It also forces the output to be a string, so be careful.

### _mixed_ setString(_mixed_ input, _mixed_ def)

Ensures that the input is an object. Although this is designed to receive key/value pairs, but it will allow other objects (eg, Date). It will not allow arrays or null values however.

### _mixed_ setString(_mixed_ input, _mixed_ def[, _array_ values])

Ensures that the input is a string. If it is a number, this is cast to a string. If you wish to specify a series of values, this can be done by passing in some values.

Example

var values = [
    'val1', 'val2', 'val3'
];
val1 = datautils.data.setString('val1', null, values); // 'val1'
val2 = datautils.data.setString('val4', null, values); // null

Validation

The model stuff primarily all works in the same way - if it passes the test it returns true, if it fails the test or the wrong input is entered it throws an error.

Error Object

The error object is an extension of the default JavaScript Error object. It has a maximum of three parameters - the message (as the Error object has by default), value (the value passed in) and params (an array of any other paramaters passed in).

For instance, the function validation.greaterThan(8, 10); throws an error (because 8 is less than 10). err.message equals VALUE_NOT_GREATER_THAN_TARGET, err.value = 8 and err.params = [ 10 ].

### _boolean_ email(_string_ value)

Checks if the given string validates as an email address. THIS DOES NOT CHECK IF THE EMAIL IS ACTUALLY VALID!!!

### _boolean_ equal(_mixed_ value, _mixed_ match)

This tests if the two variables are equal. If the variables are of a complex nature (eg, objects), then it will match those too.

### _boolean_ greaterThan(_number_ value, _number_ target)

Does a numerical test on the variable, to see if it is greater than the given value.

### _boolean_ greaterThanOrEqual(_number_ value, _number_ target)

Does a numerical test on the variable, to see if it is greater than or equal to the given value.

### _boolean_ length(_string_ value, _number_ length)

Makes sure that the value matches the length.

### _boolean_ lengthBetween(_string_ value, _number_ minLength, _number_ maxLength)

Checks if the value is between the two lengths.

### _boolean_ lessThan(_string_ value, _number_ target)

Does a numerical test on the variable, to see if it is less than the given value.

### _boolean_ lessThanOrEqual(_string_ value, _number_ target)

Does a numerical test on the variable, to see if it is less than or equal to the given value.

### _boolean_ maxLength(_string_ value, _number_ length)

Ensures that the value is no longer than the given max length.

### _boolean_ minLength(_string_ value, _number_ length)

Ensures that the value fulfils the given minimum length.

### _boolean_ regex(_string_ value, _RegExp/string_ regex)

Matches the given value against the given regular expression. It will allow either a string or an instance of the RegExp object (by either new RegExp() or /regex/).

### _boolean_ required(_string_ value)

If it's a truthy value, 0 or false, it is ok. Otherwise, it fails the test

License

MIT License