Documatic Hackathon project submission

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Advanced Relative Calendar - A luxon utility

aka SussyHackatonProject

This is a small utility that allows you to get a relative date from a given date, in a more customizable and rich way. It was built on the Luxon DateTime library.

Turn this:

date.plus({ days: 8 }).toRelativeCalendar()
// => "in 1 week"

Into this:

date.plus({ days: 8 }).toRelativeCalendarAdvanced("{{[rpf]wd}} {{[at] h m}}")
// => "the next monday at 15:32"

Or even this:

date.plus({ days: 8 }).toRelativeCalendarAdvanced("The party will be {{[rpf]wd}} at {{h|f:1}} {{ampm}}, will you be coming?")
// -> "The party will be next monday at 3 PM, will you be coming?"

...in no time!

Table of contents

• Installation *
• Features
• Syntax
  • Parameters
  • Format string
    • Tokens
      • Prefixes
      • Values
      • Filters
      • Special tokens
• Examples
• License
• Inspiration
• Acknowledgments

Installation *

npm i luxon-advanced-relative-calendar

Features

• Easy customization of simple or ultra complex relative dates
• Easy to learn syntax
• Numeric filters to format numeric values
• Smart H:M:S combo formatting
• Support for English and Spanish locales (carefully crafted by hand 😉)

Syntax

luxon.DateTime.toRelativeCalendarAdvanced(format, [locale])

Parameters

• format - The format string. See below for more info.
• locale - The locale to use. Currently, there is support for English en and Spanish es. Defaults to en.

Format string

The format string is a string that contains the desired output. It is composed of tokens and text. Tokens are enclosed in double curly braces {{}} and text is everything else. Tokens are replaced by their corresponding value, and text is left as is. General format: {{[prefix]value|filter:filterArg}}

Tokens

Tokens are composed of 3 parts: prefix, value and filters. The prefix and the filter are optional, see below for a list of available prefixes and filters.

Prefixes

• [at] - Adds the appropiate article/preposition to the value to express relativity. For example, {{[at]h}} {{ampm}} will return at 3 PM, and {{[at]wd}} will return on monday.
• [rpf] - Acts the same as the [at] prefix, but it will return the relative past/future form of the value taking in account calendar days. For example, {{[rpf]wd}} would return yesterday, today, tomorrow or next monday depending on the date given.

Values

• wd - The weekday name. For example, {{wd}} will return monday.
• h - The hour. For example, {{h}} will return 15.
• m - The minute. For example, {{m}} will return 32.
• s - The second. For example, {{s}} will return 12.

Filters

• |f: - fill - This filters outputs a value with a desired amount of digits by adding zeroes. For example, for a time where the hour is 3, {{h|f:1}} will return 3, and {{h|f:2}} will return 03.

Special tokens

• {{ampm}} - This token will return AM or PM depending on the hour given. For example, {{h m}} {{ampm}} will return 3:32 PM.

Examples

DateTime.local().toRelativeCalendarAdvanced("{{[rpf]wd}} {{[at] h m}}")
// => "today at 15:32"

DateTime.local().minus({ days: 3 }).toRelativeCalendarAdvanced("Message sent {{[rpf]wd}}")
// => "Message sent this monday"

DateTime.local().plus({ days: 8 }).toRelativeCalendarAdvanced("{{[rpf]wd}} at {{m}} minutes and {{s|f:10}} seconds after {{h|f:2}} {{ampm}}")
// => "next monday at 32 minutes and 12 seconds after 03 PM"

DateTime.local().plus({ days: 8 }).toRelativeCalendarAdvanced("El estreno será {{[rpf]wd}} {{[at]h|f:2}}:{{m|f:2}} {{ampm}}", "es")
// => "El estreno será el próximo lunes a las 03:32 PM"

License

This project is licensed under the MIT License - see the LICENSE file for details

Inspiration

• This Stackoverflow comment p.d: RIP Mr. Alexei S. 3 years have passed 😂.
• I use luxon a lot, and I wanted to make it more customizable, specially for my language (Spanish).

Acknowledgments

• Luxon for being such a great library.
• Documatic for hosting this hackathon.

* This package is not yet published on npm, but it will be soon, hopefully