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