Display birthdays

[kinduff]

I'm integrating this calendar for birthdays, assuming the birthday is stored using the correct year (e.g. 1992-03-19).

I made this patch to add a boolean option called ignore_year which will ignore the year for the grouping of the events. I initially modified the date using change(year: Time.now.year), but I didn't like the contradiction.

I'm leaving this for posterity, I'm sure someone will benefit if searching for this in the issues.

Note that the addition is the date_key declaration using strftime to parse it, and using sorted_keys that receives a date, call the hash by that modified key. Also the option parameter reader.

module SimpleCalendar
  class Calendar
    def group_events_by_date(events)
      events_grouped_by_date = Hash.new { |h, k| h[k] = [] }

      events.each do |event|
        event_start_date = event.send(attribute).to_date
        event_end_date = (event.respond_to?(end_attribute) && !event.send(end_attribute).nil?) ? event.send(end_attribute).to_date : event_start_date

        (event_start_date..event_end_date.to_date).each do |enumerated_date|
          date_key = ignore_year ? enumerated_date.strftime("%m-%d") : enumerated_date
          events_grouped_by_date[date_key] << event
        end
      end

      events_grouped_by_date
    end

    def sorted_events_for(day)
      date_key = ignore_year ? day.strftime("%m-%d") : day
      Array.wrap(sorted_events[date_key])
    end

    def ignore_year
      options.fetch(:ignore_year, false)
    end
  end
end

For the query of these "events", that in my case is people, I would query in the controller like this:

def index
  start_date = params.fetch(:start_date, Date.today).to_date
  @people = Person.where("DATE_PART('month', birthday) = :month", month: start_date.month)
end

And calling like so.

<%= month_calendar(attribute: :birthday, events: @people, ignore_year: true) do |date, people| %>
  <%= date %>

  <% people.each do |person| %>
    <div>
      <%= person.name %>
    </div>
  <% end %>
<% end %>

If this is something that is welcomed as an addition to the gem, I would be happy to submit a PR.

Edit: Maybe the key should be called events_ignore_year or similar, since its not the calendar itself, but the events that are being modified.