55 lines
1.9 KiB
Ruby
55 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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#
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# Copyright (C) 2011 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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# i18n friendly ActiveSupport::TimeZone subclass extended to play nicely with
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# our #time_zone_options_for_select method on ActionView::Helpers::InstanceTag
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class I18nTimeZone < ActiveSupport::TimeZone
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# this initialization doesn't get inherited, apparently
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@lazy_zones_map = Concurrent::Map.new
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@country_zones = Concurrent::Map.new
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# override to include both standard and DST offsets if they exist
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def formatted_offset(colon = true)
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return super unless tzinfo
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period = tzinfo.current_period
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# not planning on ever switching to/from DST again
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return super unless period.end_transition
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other_period = tzinfo.period_for_utc(period.end_transition.at)
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# always sort the DST offset second
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periods = [period, other_period].sort_by { |p| p.dst? ? 1 : 0 }
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periods.map { |p| self.class.seconds_to_utc_offset(p.utc_offset + p.std_offset, colon) }.join('/')
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end
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def to_s
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translated_name = I18n.send(:translate, keyify) || name
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"#{translated_name} (#{formatted_offset})"
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end
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def keyify
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"time_zones.#{name.gsub(/(\W|\s|-)/, '').underscore}"
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end
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def self.us_zones
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# only include specially named zones
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super.select { |zone| ActiveSupport::TimeZone::MAPPING.include?(zone.name) }
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end
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end
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