mirror of
https://github.com/discourse/discourse.git
synced 2024-12-01 05:23:43 +08:00
103 lines
2.8 KiB
Ruby
103 lines
2.8 KiB
Ruby
require 'digest/sha1'
|
|
require 'image_sizer'
|
|
require 'tempfile'
|
|
require 'pathname'
|
|
|
|
class Upload < ActiveRecord::Base
|
|
belongs_to :user
|
|
|
|
has_many :post_uploads
|
|
has_many :posts, through: :post_uploads
|
|
|
|
has_many :optimized_images, dependent: :destroy
|
|
|
|
validates_presence_of :filesize
|
|
validates_presence_of :original_filename
|
|
|
|
def thumbnail
|
|
optimized_images.where(width: width, height: height).first
|
|
end
|
|
|
|
def has_thumbnail?
|
|
thumbnail.present?
|
|
end
|
|
|
|
def create_thumbnail!
|
|
return unless SiteSetting.create_thumbnails?
|
|
return if has_thumbnail?
|
|
thumbnail = OptimizedImage.create_for(self, width, height)
|
|
optimized_images << thumbnail if thumbnail
|
|
end
|
|
|
|
def destroy
|
|
Upload.transaction do
|
|
Discourse.store.remove_file(url)
|
|
super
|
|
end
|
|
end
|
|
|
|
def self.create_for(user_id, file, filesize)
|
|
# compute the sha
|
|
sha1 = Digest::SHA1.file(file.tempfile).hexdigest
|
|
# check if the file has already been uploaded
|
|
unless upload = Upload.where(sha1: sha1).first
|
|
# deal with width & heights 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
|
|
# 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,
|
|
)
|
|
# store the file and update its url
|
|
upload.url = Discourse.store.store_upload(file, upload)
|
|
# save the url
|
|
upload.save
|
|
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
|
|
asset_host = Rails.configuration.action_controller.asset_host
|
|
url = url.gsub(/^#{asset_host}/i, "") if 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)
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_uploads_on_sha1 (sha1) UNIQUE
|
|
# index_uploads_on_url (url)
|
|
# index_uploads_on_user_id (user_id)
|
|
#
|
|
|