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Contents
# frozen_string_literal: true
module Decidim
# This class deals with uploading hero images to ParticipatoryProcesses.
class ImageUploader < ApplicationUploader
include CarrierWave::MiniMagick
process :validate_size, :validate_dimensions, :strip
process quality: Decidim.image_uploader_quality
# CarrierWave automatically calls this method and validates the content
# type fo the temp file to match against any of these options.
def content_type_whitelist
[
%r{image\/}
]
end
# Strips out all embedded information from the image
def strip
manipulate! do |img|
img.strip
img
end
end
# Add a white list of extensions which are allowed to be uploaded.
# For images you might use something like this:
def extension_white_list
%w(jpg jpeg gif png bmp ico)
end
# A simple check to avoid DoS with maliciously crafted images, or just to
# avoid reckless users that upload gigapixels images.
#
# See https://hackerone.com/reports/390
def validate_dimensions
manipulate! do |image|
validation_error!(I18n.t("carrierwave.errors.image_too_big")) if image.dimensions.any? { |dimension| dimension > max_image_height_or_width }
image
end
end
def validate_size
manipulate! do |image|
validation_error!(I18n.t("carrierwave.errors.image_too_big")) if image.size > Decidim.maximum_attachment_size
image
end
end
def max_image_height_or_width
3840
end
private
def validation_error!(text)
model.errors.add(mounted_as, text)
raise CarrierWave::IntegrityError, text
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems