Calendrical.Formatter behaviour (Calendrical v0.9.0)

Calendar formatter behaviour.

This behaviour defines a set of callbacks that are invoked during the formatting of a calendar.

At each point in the formatting process the callbacks are invoked from the "inside out". That is, format_day/4 is invoked for each day of the week, then format_week/5 is called, then format_month/4 and finally format_year/3 is called if required.

Summary

Callbacks

format_day(date, year, month, options)

Returns the formatted calendar for a day.

format_month(formatted_weeks, year, month, options)

Returns the formatted calendar for a month.

format_week(formatted_days, year, month, week_number, options)

Returns the formatted calendar for a week.

format_year(formatted_months, year, options)

Returns the formatted calendar for a year.

Callbacks

format_day(date, year, month, options)

@callback format_day(
  date :: Date.t(),
  year :: Calendar.year(),
  month :: Calendar.month(),
  options :: map()
) :: any()

Returns the formatted calendar for a day.

Arguments

date is the Date.t/0 of the day being formatted.
year is the year for which the calendar is requested.
month is the month for which the calendar is requested.
options is a keyword list of formatter options.

Returns

An arbitrary result as required by the implementing formatter, which is passed to format_week/5.

format_month(formatted_weeks, year, month, options)

@callback format_month(
  formatted_weeks :: String.t(),
  year :: Calendar.year(),
  month :: Calendar.month(),
  options :: map()
) :: any()

Returns the formatted calendar for a month.

Arguments

formatted_weeks is the result returned by format_week/5.
year is the year for which the calendar is requested.
month is the month for which the calendar is requested.
options is a keyword list of formatter options.

Returns

An arbitrary result as required by the implementing formatter, which is either returned (if called by Calendrical.Format.month/3) or passed to format_year/3 if not.

format_week(formatted_days, year, month, week_number, options)

@callback format_week(
  formatted_days :: String.t(),
  year :: Calendar.year(),
  month :: Calendar.month(),
  week_number :: {Calendar.year(), pos_integer()},
  options :: map()
) :: any()

Returns the formatted calendar for a week.

Arguments

formatted_days is the result returned by format_day/4.
year is the year for which the calendar is requested.
month is the month for which the calendar is requested.
week_number is a 2-tuple of the form {year, week_number} that represents the week-of-year for the week to be formatted.
options is a keyword list of formatter options.

Returns

An arbitrary result as required by the implementing formatter, which is passed to format_month/4.

format_year(formatted_months, year, options)

@callback format_year(
  formatted_months :: String.t(),
  year :: Calendar.year(),
  options :: map()
) :: any()

Returns the formatted calendar for a year.

Arguments

formatted_months is the result returned by format_month/4.
year is the year for which the calendar is requested.
options is a keyword list of formatter options.

Returns

An arbitrary result as required by the implementing formatter.