forked from fedi/mastodon
48 lines
1.5 KiB
Ruby
48 lines
1.5 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'mime/types'
|
|
|
|
module Attachmentable
|
|
extend ActiveSupport::Concern
|
|
|
|
MAX_MATRIX_LIMIT = 16_777_216 # 4096x4096px or approx. 16MB
|
|
|
|
included do
|
|
before_post_process :set_file_extensions
|
|
before_post_process :check_image_dimensions
|
|
end
|
|
|
|
private
|
|
|
|
def set_file_extensions
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank?
|
|
|
|
attachment.instance_write :file_name, [Paperclip::Interpolations.basename(attachment, :original), appropriate_extension(attachment)].delete_if(&:blank?).join('.')
|
|
end
|
|
end
|
|
|
|
def check_image_dimensions
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank? || !attachment.content_type.match?(/image.*/) || attachment.queued_for_write[:original].blank?
|
|
|
|
width, height = FastImage.size(attachment.queued_for_write[:original].path)
|
|
|
|
raise Mastodon::DimensionsValidationError, "#{width}x#{height} images are not supported" if width.present? && height.present? && (width * height >= MAX_MATRIX_LIMIT)
|
|
end
|
|
end
|
|
|
|
def appropriate_extension(attachment)
|
|
mime_type = MIME::Types[attachment.content_type]
|
|
|
|
extensions_for_mime_type = mime_type.empty? ? [] : mime_type.first.extensions
|
|
original_extension = Paperclip::Interpolations.extension(attachment, :original)
|
|
|
|
extensions_for_mime_type.include?(original_extension) ? original_extension : extensions_for_mime_type.first
|
|
end
|
|
end
|