Noosfero/noosfero

module DatesHelper
  include ActionView::Helpers::DateHelper
  def months
    I18n.t("date.month_names")
  end

  def month_name(n, abbreviated = false)
    if abbreviated
      I18n.t("date.abbr_month_names")[n]
    else
      months[n]
    end
  end

  # formats a date for displaying.
  def show_date(date, use_numbers = false, year = true, left_time = false, abbreviated = false)
    if date && abbreviated
      date_format = year ? _("%{month_name} %{year}") : _("%{month_name} %{day}")
      date_format % { day: date.day, month_name: month_name(date.month, true), year: date.year }
    elsif date && use_numbers
      date_format = year ? _("%{month}/%{day}/%{year}") : _("%{month}/%{day}")
      date_format % { day: date.day, month: date.month, year: date.year }
    elsif date && left_time
      date_format = time_ago_in_words(date)
    elsif date
      date_format = year ? _("%{month_name} %{day}, %{year}") : _("%{month_name} %{day}")
      date_format % { day: date.day, month_name: month_name(date.month), year: date.year }
    else
      ""
    end
  end

  # formats a datetime for displaying.
  def show_time(time, use_numbers = false, year = true, left_time = false)
    if time && use_numbers
      _("%{month}/%{day}/%{year}, %{hour}:%{minutes}") % { year: (year ? time.year : ""), month: time.month, day: time.day, hour: time.hour, minutes: time.strftime("%M") }
    elsif time && left_time
      date_format = time_ago_in_words(time)
    elsif time
      date_format = year ? _("%{month_name} %{day}, %{year} %{hour}:%{minutes}") : _("%{month_name} %{day} %{hour}:%{minutes}")
      date_format % { day: time.day, month_name: month_name(time.month), year: time.year, hour: time.hour, minutes: time.strftime("%M") }
    else
      ""
    end
  end

  def show_period(date1, date2 = nil, use_numbers = false)
    if (date1 == date2) || (date2.nil?)
      show_time(date1, use_numbers)
    else
      if date1.year == date2.year
        if date1.month == date2.month
          _("from %{month} %{day1} to %{day2}, %{year}") % {
            day1: date1.day,
            day2: date2.day,
            month: use_numbers ? date1.month : month_name(date1.month),
            year: date1.year
          }
        else
          _("from %{date1} to %{date2}, %{year}") % {
            date1: show_date(date1, use_numbers, false),
            date2: show_date(date2, use_numbers, false),
            year: date1.year
          }
        end
      else
        _("from %{date1} to %{date2}") % {
          date1: show_time(date1, use_numbers),
          date2: show_time(date2, use_numbers)
        }
      end
    end
  end

  def show_day_of_week(date, abbreviated = false)
    # FIXME Date#strftime should translate this for us !!!!
    N_("Sun"); N_("Mon"); N_("Tue"); N_("Wed"); N_("Thu"); N_("Fri"); N_("Sat");
    if abbreviated
      _(date.strftime("%a"))
    else
      # FIXME Date#strftime should translate this for us !!!!
      I18n.t("date.day_names")[date.wday]
    end
  end

  def show_month(year, month, opts = {})
    date = build_date(year, month)
    if opts[:next]
      date = date >> 1
    elsif opts[:previous]
      date = date << 1
    end
    if opts[:only_month]
      _("%{month}") % { month: month_name(date.month.to_i) }
    else
      _("%{month} %{year}") % { year: date.year, month: month_name(date.month.to_i) }
    end
  end

  def build_date(year, month, day = 1)
    if year.blank? && month.blank? && day.blank?
      DateTime.now
    else
      if year.blank?
        year = DateTime.now.year
      end
      if month.blank?
        month = DateTime.now.month
      end
      if day.blank?
        day = 1
      end
      DateTime.new(year.to_i, month.to_i, day.to_i)
    end
  end

  def link_to_previous_month(year, month, label = nil)
    date = build_date(year, month)
    previous_month_date = date - 1.month

    label ||= show_month(previous_month_date.year, previous_month_date.month)
    button(:back, label, year: previous_month_date.year, month: previous_month_date.month)
  end

  def link_to_next_month(year, month, label = nil)
    date = build_date(year, month)
    next_month_date = date + 1.month

    label ||= show_month(next_month_date.year, next_month_date.month)
    button(:next, label, year: next_month_date.year, month: next_month_date.month)
  end

  def pick_date(object, method, options = {}, html_options = {})
    if language == "en"
      order = [:month, :day, :year]
    else
      order = [:day, :month, :year]
    end
    date_select(object, method, html_options.merge(options.merge(include_blank: true, order: order, use_month_names: months)))
  end
end