demarches-normaliennes/app/lib/file_size_validator.rb

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# Source: https://github.com/gitlabhq/gitlabhq/blob/master/lib/file_size_validator.rb
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class FileSizeValidator < ActiveModel::EachValidator
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MESSAGES = { is: :wrong_size, minimum: :size_too_small, maximum: :size_too_big }.freeze
CHECKS = { is: :==, minimum: :>=, maximum: :<= }.freeze
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DEFAULT_TOKENIZER = lambda { |value| value.split(//) }
RESERVED_OPTIONS = [:minimum, :maximum, :within, :is, :tokenizer, :too_short, :too_long]
def initialize(options)
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range = options.delete(:in) || options.delete(:within)
if range.present?
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raise ArgumentError, ":in and :within must be a Range" if !range.is_a?(Range)
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options[:minimum], options[:maximum] = range.begin, range.end
options[:maximum] -= 1 if range.exclude_end?
end
super
end
def check_validity!
keys = CHECKS.keys & options.keys
if keys.empty?
raise ArgumentError, 'Range unspecified. Specify the :within, :maximum, :minimum, or :is option.'
end
keys.each do |key|
value = options[key]
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if !(value.is_a?(Integer) && value >= 0) && !value.is_a?(Symbol)
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raise ArgumentError, ":#{key} must be a nonnegative Integer or symbol"
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end
end
end
def validate_each(record, attribute, value)
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raise(ArgumentError, "A CarrierWave::Uploader::Base object was expected") if !value.kind_of? CarrierWave::Uploader::Base
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value = (options[:tokenizer] || DEFAULT_TOKENIZER).call(value) if value.kind_of?(String)
CHECKS.each do |key, validity_check|
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next if !check_value = options[key]
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check_value =
case check_value
when Integer
check_value
when Symbol
record.send(check_value)
end
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value ||= [] if key == :maximum
value_size = value.size
next if value_size.send(validity_check, check_value)
errors_options = options.except(*RESERVED_OPTIONS)
errors_options[:file_size] = help.number_to_human_size check_value
default_message = options[MESSAGES[key]]
errors_options[:message] ||= default_message if default_message
record.errors.add(attribute, MESSAGES[key], errors_options)
end
end
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def help
Helper.instance
end
class Helper
include Singleton
include ActionView::Helpers::NumberHelper
end
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end