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135 lines
3.6 KiB
Ruby
135 lines
3.6 KiB
Ruby
require 'digest/sha1'
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require 'image_sizer'
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require 'tempfile'
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require 'pathname'
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require_dependency 's3_store'
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require_dependency 'local_store'
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class Upload < ActiveRecord::Base
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belongs_to :user
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has_many :post_uploads
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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
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optimized_images.where(width: width, height: height).first
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end
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def thumbnail_url
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thumbnail.url if has_thumbnail?
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end
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def has_thumbnail?
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thumbnail.present?
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end
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def create_thumbnail!
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return unless SiteSetting.create_thumbnails?
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return if SiteSetting.enable_s3_uploads?
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return if has_thumbnail?
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thumbnail = OptimizedImage.create_for(self, width, height)
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optimized_images << thumbnail if thumbnail
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end
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def destroy
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Upload.transaction do
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Upload.remove_file url
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super
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end
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end
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def self.create_for(user_id, file)
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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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unless upload = Upload.where(sha1: sha1).first
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# deal with width & heights 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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# 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: File.size(file.tempfile),
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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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})
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# store the file and update its url
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upload.url = Upload.store_file(file, sha1, upload.id)
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# save the url
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upload.save
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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.store_file(file, sha1, upload_id)
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return S3Store.store_file(file, sha1, upload_id) if SiteSetting.enable_s3_uploads?
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return LocalStore.store_file(file, sha1, upload_id)
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end
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def self.remove_file(url)
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return S3Store.remove_file(url) if SiteSetting.enable_s3_uploads?
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return LocalStore.remove_file(url)
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end
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def self.has_been_uploaded?(url)
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is_relative?(url) || is_local?(url) || is_on_s3?(url)
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end
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def self.is_relative?(url)
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url.start_with?(LocalStore.directory)
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end
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def self.is_local?(url)
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!SiteSetting.enable_s3_uploads? && url.start_with?(LocalStore.base_url)
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end
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def self.is_on_s3?(url)
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SiteSetting.enable_s3_uploads? && url.start_with?(S3Store.base_url)
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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(/^#{LocalStore.asset_host}/i, "") if LocalStore.asset_host.present?
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Upload.where(url: url).first if 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_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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