date-events

EventEmitter that emits date/time events.

usage

var clock = require('date-events')()

console.log('Count-down until next minute...')

clock.on('second', function (sec) {
    console.log(60 - sec)
})

clock.on('minute', function (min) {
    console.log('Minute ' + min + ' has arrived!')
})

// alternate syntax (every minute of every hour)
clock.on('*:*', function (date) {
    console.log('Also known as ' + date)
    clock.removeAllListeners()
})

api

var dateEvents = require('date-events')

var clock = dateEvents(options)

Create a new EventEmitter that emits date and time events. Valid options include:

• startDate (optional) - Date object representing the the Date to start the Emitter object at. The first tick will bring the object to the current date and time and produce any relevant events in the process.
• unref (optional) - A boolean value indicating whether the internal interval that generates events should be unreferenced, allowing the program to exit if despite it being on the event loop.

events

The following events will be emitted at the proper times:

• year - emitted with 4-digit year number
• month - emitted with two values: month number (1-12) and (lowercase) month name
• date - emitted with day of month number (1-31)
• weekday - emitted with two values: weekday number (1 - 7) and (lowercase) day name
• hour - emitted with hour number (0-23)
• minute - emitted with minute number (0-59)
• second - emitted with second number (0-59)
• january through december - emitted at start of corresponding month, with no value
• sunday through saturday - emitted at start of corresponding days, with no value
• sunday HH:MM through saturday HH:MM - emitted at appropriate time of corresponding day
• YYYY-MM-DD - emitted with Javascript Date object
• YYYY-MM-DD HH:MM - emiitetd with Javascript Date object
• HH:MM - emitted with Javascript Date object

wildcards

In the above events, wildcards (*) may be substituded in place of any of the following: YYYY, MM, DD, HH, or MM. The wildcard will match any value. So to match every day of June, in every year for example, the event would look like: *-06-*.

exiting

This module will keep your program alive as long as there are listeners, unless you passed {unref: true} as an option at creation time. If the module was not passed the unref option, you must removeAllListeners in order to allow the program to exit cleanly.

additional examples

// Do something at 15 minutes past every hour:
clock.on('*:15', function (date) {})

// Do something every New Years day at midnight
clock.on('*-01-01 00:00', function (date) {})

// Do something every Sunday at 4pm
clock.on('sunday 16:00', function (date) {})

install

With npm do:

npm install date-events

testing

npm test

coverage

npm run view-cover

This will output a textual coverage report.

npm run open-cover

This will open an HTML coverage report in the default browser.