mirror of
https://github.com/discourse/discourse.git
synced 2024-12-18 21:30:04 +08:00
140 lines
4.0 KiB
Ruby
140 lines
4.0 KiB
Ruby
require "digest/sha1"
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require_dependency "image_sizer"
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require_dependency "file_helper"
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require_dependency "validators/upload_validator"
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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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validates_with ::Validators::UploadValidator
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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, filename, filesize, origin = nil)
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# compute the sha
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sha1 = Digest::SHA1.file(file).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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# initialize a new upload
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upload = Upload.new(
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user_id: user_id,
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original_filename: filename,
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filesize: filesize,
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sha1: sha1,
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url: ""
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)
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# trim the origin if any
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upload.origin = origin[0...1000] if origin
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# deal with width & height for images
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if FileHelper.is_image?(filename)
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begin
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# retrieve image info
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image_info = FastImage.new(file, raise_on_failure: true)
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# compute image aspect ratio
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upload.width, upload.height = ImageSizer.resize(*image_info.size)
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# make sure we're at the beginning of the file (FastImage moves the pointer)
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file.rewind
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rescue FastImage::ImageFetchFailure
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upload.errors.add(:base, I18n.t("upload.images.fetch_failure"))
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rescue FastImage::UnknownImageType
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upload.errors.add(:base, I18n.t("upload.images.unknown_image_type"))
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rescue FastImage::SizeNotFound
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upload.errors.add(:base, I18n.t("upload.images.size_not_found"))
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end
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return upload unless upload.errors.empty?
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end
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# create a db record (so we can use the id)
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return upload unless upload.save
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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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upload.errors.add(:url, I18n.t("upload.store_failure", { upload_id: upload.id, user_id: 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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# origin :string(1000)
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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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