require "digest/sha1" require "image_sizer" class Upload < ActiveRecord::Base belongs_to :user has_many :post_uploads, dependent: :destroy has_many :posts, through: :post_uploads has_many :optimized_images, dependent: :destroy validates_presence_of :filesize validates_presence_of :original_filename def thumbnail(width = self.width, height = self.height) optimized_images.where(width: width, height: height).first end def has_thumbnail?(width, height) thumbnail(width, height).present? end def create_thumbnail!(width, height) return unless SiteSetting.create_thumbnails? thumbnail = OptimizedImage.create_for(self, width, height) if thumbnail optimized_images << thumbnail self.width = width self.height = height save! end end def destroy Upload.transaction do Discourse.store.remove_upload(self) super end end def extension File.extname(original_filename) end def self.create_for(user_id, file, filesize, origin = nil) # compute the sha sha1 = Digest::SHA1.file(file.tempfile).hexdigest # check if the file has already been uploaded upload = Upload.where(sha1: sha1).first # delete the previously uploaded file if there's been an error if upload && upload.url.blank? upload.destroy upload = nil end # create the upload unless upload # deal with width & height for images if SiteSetting.authorized_image?(file) # retrieve image info image_info = FastImage.new(file.tempfile, raise_on_failure: true) # compute image aspect ratio width, height = ImageSizer.resize(*image_info.size) # make sure we're at the beginning of the file (FastImage is moving the pointer) file.rewind end # trim the origin if any origin = origin[0...1000] if origin # create a db record (so we can use the id) upload = Upload.create!( user_id: user_id, original_filename: file.original_filename, filesize: filesize, sha1: sha1, url: "", width: width, height: height, origin: origin, ) # store the file and update its url url = Discourse.store.store_upload(file, upload) if url.present? upload.url = url upload.save else Rails.logger.error("Failed to store upload ##{upload.id} for user ##{user_id}") end end # return the uploaded file upload end def self.get_from_url(url) # we store relative urls, so we need to remove any host/cdn url = url.gsub(/^#{Discourse.asset_host}/i, "") if Discourse.asset_host.present? Upload.where(url: url).first if Discourse.store.has_been_uploaded?(url) end end # == Schema Information # # Table name: uploads # # id :integer not null, primary key # user_id :integer not null # original_filename :string(255) not null # filesize :integer not null # width :integer # height :integer # url :string(255) not null # created_at :datetime not null # updated_at :datetime not null # sha1 :string(40) # origin :string(1000) # # Indexes # # index_uploads_on_id_and_url (id,url) # index_uploads_on_sha1 (sha1) UNIQUE # index_uploads_on_url (url) # index_uploads_on_user_id (user_id) #