utils

Utils include a series of helpers that can be used in different scenarios

Installation instructions

run npm i @entando/utils

Logic Helpers

Every helper is imported in the following manner:

import { <helper> } from '@entando/utils'

the <helper> name always matches the one in the title of the following sections. Each title also contains the expected arguments and the return type of helper in between square brackets.

hasAccess(requiredPermissions, currentUserPermissions) [bool]

the first parameter can be either a string or an array of string, the second parameter can be either a string or an array of string. if the user permissions contain any of the required permissions the helper will return true.

throttle(callback) [void]

throttle(callback);

throttle() executes the callback after a random number of milliseconds. This helper is used to simulate async calls.

routeConverter(route, params) [string]

routeConverter('myroute/:param1/:param2', {
  param1: 12,
  param2: 22,
});

routeConverter() replaces placeholders with the values found in the given object. The aforementioned example will return /myroute/12/22.

isInteger(numericValue) [bool]

isInteger(numericValue);

isInteger() checks whether or not a numeric value is an integer. Numeric strings that can be converted to integers pass the test.

isEmpty(string) [bool]

isEmpty(string);

isEmpty() checks whether or not a string is empty. The helper also trims the string when testing to ensure that string only containing spaces won't pass the test.

addFilter(filter) [string]

const filter = {
  attribute: 'code',
  value: 'test_code',
  operator: FILTER_OPERATORS.LIKE,
  pos: 0,
};

addFilter(filter);

addFilter() converts a filter object into the query string equivalent:

'filters[0].attribute=code&filters[0].operator=like&filters[0].value=test_code'

Also, if the value property is multi-value (an array), value in query string will be converted into allowedValues. For example, if you have such filter:

const filter = {
  attribute: 'code',
  value: ['test', 'code'],
  operator: FILTER_OPERATORS.EQUAL,
  pos: 1,
};

addFilter(filter);

This will result into this query string below:

'filters[1].attribute=code&filters[1].operator=eq&filters[1].allowedValues[0]=test&filters[1].allowedValues[1]=code'

The method itself does not validate any of the values in the object.

setSorting(sorting) [array]

setSorting({
  attribute: 'code',
  direction: SORT_DIRECTIONS.ASCENDANT,
});

setSorting() returns an array that can be easily converted into a query string through join(). The first element of the array is always the sort attribute, while the second one contains the direction.

[
  'sort=attributeName',
  'direction=ASC',
]

If the direction sent is not listed in the SORT_DIRECTIONS constant the default one will be used.

setFilters(object, operators) [array]

const object = {
  carName: 'fiat',
  model: 'punto',
  year: 2012,
};

const operators = {
  carName: FILTER_OPERATORS.EQUAL,
  model: FILTER_OPERATORS.EQUAL,
  year: FILTER_OPERATORS.EQUAL,
};

setFilters(object, operators);

setFilters() returns an array that can be easily converted into a query string through join(). Each element of the array is a string like the one returned by addFilter().

object is an object in which each key is the attribute name and the value is the actual value.

operators is another object where each key is the attribute name and the value is the operator used by the filter.

[
  'sort=attributeName',
  'direction=ASC',
]

If the operator for the given attribute name cannot be found the default operator is going to be used.

convertToQueryString(filters) [string]

const filters = {
  formValues: object,
  operators,
  sorting: {
    attribute: 'code',
  },
};

converToQueryString(filters);

convertToQueryString() combines the functionalities of setSorting() and setFilters() returning already a query string.

formValues contains the same object described in the setFilters() helper.

operators contains the same operators object described in setFilters() helper.

sorting contains the same type of object described in the setSorting() helper.

The resulting string is prepended by a ?, or empty if no query string could be generated.

setCurrentLocale(locale)

Sets the current locale for the formattedText method.

formattedText(id, defaultMessage, values) [IntlMessageFormat]

Returns a IntlMessageFormat object containing the translation for the given message id.

getMonthDayYearFormat(date, locale) [string]

getMonthDayYearFormat expect any valid date string/integer as the first argument, and any valid locale as the second argument. Locale defaults to en-us if not specified.

Returns a string in the desired locale format: i.e. "January 12, 2018".

React Helpers

Every helper is imported in the following manner:

import { <helper> } from '@entando/utils'

Every helper returns a react component.

PermissionCheck

this component will either render the children or the given 403 page. the given properties are required:

• children
• page403: the 403 page to render. a default one is now part of @entando/pages
• requiredPermissions: the list of required permissions (see hasAccess)
• userPermissions: the current user permissions (see hasAccess)

required(value)

Returns a FormattedMessage component if value is not defined

maxLength(max)(value)

Returns a FormattedMessage component if value's length is greater than max

minLength(min)(value)

Returns a FormattedMessage component if value's length is less than min

isNumber(value)

Returns a FormattedMessage component if value is not a number.

minValue(min)(value)

Returns a FormattedMessage component if value is less than min

maxValue(max)(value)

Returns a FormattedMessage component if value is greater than max

email(value)

Returns a FormattedMessage component if value is not a valid email address.

alphaNumeric(value)

Returns a FormattedMessage component if value is not alphanumeric.

widgetCode(value)

Returns a FormattedMessage component if value's format is not valid for widget codes.

userFormText(value)

Returns a FormattedMessage component if value's format is not valid for user form texts.

code(value)

Returns a FormattedMessage component if value's format is not valid for a code.

matchElement(fieldName, messageId)(value, allValues)

Returns a FormattedMessage component with the given messageId if value does not match the value of the fieldName key in the allValues object.

matchPassword(value, allValues)

Returns a FormattedMessage component if the given value does not match the value in the password key of the allValues object.

Constants

A few constants are also exported by this package.

FILTER_OPERATORS and DEFAULT_FILTER_OPERATOR

FILTER_OPERATORS list the operators that should be used when using the setFilters helper.

The available keys are: EQUAL, GREATER_THAN, LESS_THAN, NOT and LIKE.

SORT_DIRECTIONS and DEFAULT_SORT_DIRECTION

SORT_DIRECTIONS list the directions that should be used when using the setSorting helper.

The available keys are: ASCENDANT and DESCENDANT.