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# frozen_string_literal: true
class Pagy
class Calendar
# Mixin for month based unit periods
# It is used for month and quarter, but you could use it to implement less common unit of 6, 4, 2 months
# (see the https://ddnexus.github.io/pagy/api/calendar#custom-units sections for details).
# The including class must set the MONTHS duration for the unit and the usual DEFAULT.
module MonthMixin
protected
# Setup the calendar variables
def setup_unit_vars
super
@months = self.class::MONTHS # number of months in the unit
@initial = unit_starting_time_for(@starting)
@final = add_months_to(unit_starting_time_for(@ending), @months)
@pages = @last = (months_in(@final) - months_in(@initial)) / @months
@from = starting_time_for(@page)
@to = add_months_to(@from, @months)
end
# Starting time for the page
def starting_time_for(page)
add_months_to(@initial, offset_units_for(page) * @months)
end
private
# Unit starting time for time
def unit_starting_time_for(time)
# remove 1 month for 0-11 calculations and add it back for 1-12 conversion
starting_month = (@months * ((time.month - 1) / @months)) + 1
new_time(time.year, starting_month)
end
# Number of months in time
def months_in(time)
(time.year * 12) + time.month
end
# Add months to time
def add_months_to(time, months)
months += months_in(time) - 1 # remove 1 month for 0-11 calculations
new_time(months / 12, (months % 12) + 1) # add 1 month back for 1-12 conversion
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems