fonk-later-date-validator

This is a fonk microlibrary that brings validation capabilities to:

• Validate if a field of a form is later than a specified date.

How to install it:

npm install @lemoncode/fonk-later-date-validator --save

How to add it to an existing form validation schema:

We have the following form model:

const myFormValues = {
  product: 'shoes',
  purchaseDate: new Date(),
}

The validator must be configured with the following required arguments:

export interface CustomArgs {
  date: Date;
  parseStringToDateFn?: (value: string) => Date;
  inclusive?: boolean;
}

These are the default arguments:

let defaultCustomArgs: CustomArgs = {
  date: null,
  parseStringToDateFn: null,
  inclusive: false,
};

We can add a laterDate validation to the myFormValues

import { laterDate } from '@lemoncode/fonk-later-date-validator';

const validationSchema = {
  field: {
    purchaseDate: [
      {
        validator: laterDate.validator,
        customArgs: { date: new Date('2019-02-10') },
      },
    ],
  },
};

You can customize the error message displayed in two ways:

• Globally, replace the default error message in all validationSchemas (e.g. porting to spanish):

import { laterDate } from '@lemoncode/fonk-later-date-validator';

laterDate.setErrorMessage('El campo debe de ser numérico');

• Locally just override the error message for this validationSchema:

import { laterDate } from '@lemoncode/fonk-later-date-validator';

const validationSchema = {
  field: {
    purchaseDate: [
      {
        validator: laterDate.validator,
        message: 'Error message only updated for the validation schema',
        customArgs: { date: new Date('2019-02-10') },
      },
    ],
  },
};

This validator compare Date values. If your model use dates as string format, you can provide the parseStringToDateFn method.

import { laterDate } from '@lemoncode/fonk-later-date-validator';

const validationSchema = {
  field: {
    purchaseDate: [
      {
        validator: laterDate.validator,
        customArgs: {
          date: new Date('2019-03-10T00:00:00'),
          parseStringToDateFn: value => new Date(value),
        },
      },
    ],
  },
};

Or if you are using some third party library like moment, date-fns, etc:

import { laterDate } from '@lemoncode/fonk-later-date-validator';
+ import parse from 'date-fns/parse'

const validationSchema = {
  field: {
    purchaseDate: [
      {
        validator: laterDate.validator,
        customArgs: {
          date: new Date('2019-03-10T00:00:00'),
-         parseStringToDateFn: value => new Date(value),
+         parseStringToDateFn: value => parse(value, 'yyyy-MM-dd HH:mm:ss', new Date()),
        },
      },
    ],
  },
};

You can specify the custom arguments in two ways:

• Locally just customize the arguments for this validationSchema:

import { laterDate } from '@lemoncode/fonk-later-date-validator';

const validationSchema = {
  field: {
    purchaseDate: [
      {
        validator: laterDate.validator,
        customArgs: {
          date: new Date('2019-03-10'),
          parseStringToDateFn: value => new Date(value),
        },
      },
    ],
  },
};

• Globally, replace the default custom arguments in all validationSchemas (e.g. enable strict types):

import { laterDate } from '@lemoncode/fonk-later-date-validator';

laterDate.setCustomArgs({ parseStringToDateFn: (value) => new Date(value) ) });

// OR

laterDate.setCustomArgs({ date: new Date() });

// OR

laterDate.setCustomArgs({ inclusive: true });

// OR

laterDate.setCustomArgs({ date: new Date(), parseStringToDateFn: (value) => new Date(value)), inclusive: true });

Please, refer to fonk to know more.

License

MIT

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