demarches-normaliennes/app/lib/file_size_validator.rb
2018-10-01 16:15:46 +02:00

94 lines
2.4 KiB
Ruby

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