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: / var / canvas / lib / utils /
Filename : time_presenter.rb
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# frozen_string_literal: true

# Copyright (C) 2014 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.

module Utils
  class TimePresenter
    attr_reader :time, :zone

    def initialize(time, zone = nil)
      zone ||= ::Time.zone
      @time = time.in_time_zone(zone) rescue time
      @zone = zone
    end

    def as_string(options = {})
      return nil unless time

      range_time = get_range_time(options[:display_as_range])
      if is_range?(range_time)
        other = TimePresenter.new(range_time, zone)
        I18n.t("time.ranges.times",
               "%{start_time} to %{end_time}",
               start_time: formatted_result,
               end_time: other.as_string)
      else
        formatted_result
      end
    end

    private

    def formatted_result
      I18n.l(time, format:)&.strip
    end

    def get_range_time(raw)
      raw.in_time_zone(zone) rescue raw
    end

    def is_range?(range_time)
      range_time && range_time != time
    end

    def format
      (time.min == 0) ? :tiny_on_the_hour : :tiny
    end
  end
end