debshots/app/models/screenshot.rb
2021-02-21 11:12:35 +01:00

187 lines
5.5 KiB
Ruby

class Screenshot < ApplicationRecord
belongs_to :package, inverse_of: :screenshots
belongs_to :user, inverse_of: :screenshots
# Paperclip
has_attached_file :image,
styles: { :large => '800x600>', :thumb => '160x120>' },
default_url: '/images/dummy/no-screenshots-available.svg',
path: ':rails_root/public/screenshots/:id_partition/:style.png',
url: '/screenshots/:id_partition/:style.png'
# validates_attachment_content_type :image, :content_type => 'image/png'
# validates_with AttachmentSizeValidator, :attributes => :image, :less_than => 5.megabytes
# validate :validate_image_is_unique
# validates :delete_reason, length: { in: 5..100 }, allow_nil: true
# Shrine
include ImageUploader::Attachment(:simage) # adds an `simage` virtual attribute
# Calculate how many days ago this screenshot has been uploaded
def age
time_ago_in_words(self.created_at)
end
# Return caption for full-screen screenshots.
# Takes the description of a screenshot if available.
# Otherwise it falls back to the general description of its package.
def caption
if self.description.present?
"#{self.description}"
else
"#{self.package.description}"
end
end
# Future use…
# def uploader
# if self.user
# self.user.name
# else
# 'Anonymous'
# end
# end
# Return Debshots 1.x path to allow migration of images into Paperclip filesystem schema
# def image_url(size)
# "live/screenshots/approved/#{self.package.name[0]}/#{self.package.name}/#{self.id}_#{size}.png"
# end
# Long status text for public users
def status
text = 'This image '
if self.approved
text << 'is public'
else
text << 'has to be moderated before being publicly visible'
end
if self.markedfordelete
text << ' (and was requested to be removed)'
end
return text
end
# Brief text describing the status of this screenshots (for admins)
def adminstatus
if self.markedfordelete
"Removal requested > #{self.delete_reason}"
elsif self.approved
'Public'
else
fa_icon('hourglass') + 'Waiting for approval'
end
end
# Publish a screenshot from the moderation queue
def approve!
self.delete_reason = nil
self.markedfordelete = false
self.approved = true
self.save!
end
# Get the newest screenshot regardless of the package it belongs to
def self.newest_upload
self.order(created_at: :desc).where(approved: true).first
end
# Returns true if the current user has administrative permissions
# def can_admin?
# self.admin == 1
# end
# Returns true if the current user can upload screenshots without moderation
# def can_upload_without_moderation?
# # Admins can upload without moderation
# true if self.can_admin
# # Authenticated users with at least one approved screenshot
# #true if self.screenshots.where(approved: true).count >= 1
# # Other visitors require moderation
# false
# end
# Returns true if the current user can delete screenshots
# def can_delete?
# # Admins can delete screenshots
# true if self.can_admin
# # Authenticated users with at least one approved screenshot
# #true if self.screenshots.where(approved: true).count >= 1
# # Other visitors require moderation
# false
# end
# Return the part of the version up to the first - or +
def upstream_version
self.version.split(/[\-\+]/).first
end
# Returns the path to this screenshot's image on disk
def disk_path
ActiveStorage::Blob.service.send(:path_for, self.image.key)
end
# Returns the MD5 hex digest of the current screenshot's data
def checksum
# local files stored on disk:
# url = "#{Rails.root}/public/#{attachment.path}"
Digest::MD5.hexdigest(disk_path)
# remote files stored on another person's computer:
#url = attachment.url
#Digest::MD5.base64digest(Net::HTTP.get(URI(url)))
end
# Returns a medium sized image (Papeclip-style)
# def medium_image
# if self.image.attached?
# self.image.variant(
# resize_to_limit: [670, 600]
# ).processed
# end
# end
# # Returns the image variant that links to a medium-size screenshot for the details page
# def large_image_watermarked
# if self.image.attached?
# self.image.variant(
# gravity: 'East',
# draw: 'image Over 0,0 0,0 "public/logo/watermark.png"'
# ).processed
# end
# end
private
# Validator that checks if the image has already been uploaded.
# A generic uniqueness validator does not work because it would attribute
# the error to the :image_fingerprint field and not the actual :image field.
# Currently this check makes sure that the same screenshot is not uploaded
# twice for the same package. However it allows the screenshot to be uploaded
# for two different packages. Restricting that further may happen later.
def validate_image_is_unique
# Look for images with the same checksum / image_fingerprint
if screenshot=Screenshot.find_by(image_fingerprint: image_fingerprint, package_id: self.package.id)
unless screenshot.id == self.id
errors.add(:image, "has already been uploaded for this package")
end
end
end
# Check that the uploaded file can be handled by ImageMagick and is not broken
# def image_intact?
# begin
# #MiniMagick::Image.open(self.image.blob.open)
# MiniMagick::Image.read(self.image.download)
# rescue MiniMagick::Invalid => exc
# error.add(:image, 'appears to be a broken image file')
# end
# end
end