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Contents
# frozen_string_literal: true
# This validator checks when the files to be uploaded are images and the attached uploader's
# has enabled dimensions validation that the image dimensions are below the
# limit defined by the uploader
require "mini_magick"
class UploaderImageDimensionsValidator < ActiveModel::Validations::FileContentTypeValidator
def validate_each(record, attribute, value)
begin
values = parse_values(value)
rescue JSON::ParserError
record.errors.add attribute, :invalid
return
end
return if values.empty?
uploader = record.attached_uploader(attribute) || record.send(attribute)
return unless uploader.is_a?(Decidim::ApplicationUploader)
values.each do |val|
validate_image_size(record, attribute, val, uploader)
end
end
def validate_image_size(record, attribute, file, uploader)
return unless uploader.validable_dimensions
return if (image = extract_image(file)).blank?
record.errors.add attribute, I18n.t("carrierwave.errors.image_too_big") if image.dimensions.any? { |dimension| dimension > uploader.max_image_height_or_width }
end
def extract_image(file)
return unless file.try(:content_type).to_s.start_with?("image")
if file.is_a?(ActionDispatch::Http::UploadedFile)
MiniMagick::Image.new(file.path)
elsif file.is_a?(ActiveStorage::Attached) && file.blob.persisted?
MiniMagick::Image.read(file.blob.download)
end
rescue ActiveStorage::FileNotFoundError
# Although the blob is persisted, the file is not available to download and analyze
# after committing the record
nil
end
def check_validity!; end
end
Version data entries
19 entries across 19 versions & 1 rubygems