debshots/app/models/screenshot.rb

121 lines
3.2 KiB
Ruby

class Screenshot < ApplicationRecord
belongs_to :package, inverse_of: :screenshots
belongs_to :user, inverse_of: :screenshots
# Default sorting:
# - unapproved first (to see them at the top when moderating)
# - otherwise show newest first
default_scope { order(approved: :asc, hidden: :asc, created_at: :desc) }
scope :approved, -> { where(approved: true) }
# Shrine
include ImageUploader::Attachment(:simage) # adds an `simage` virtual attribute
# 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
# 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.approved
'Public'
else
#fa_icon('hourglass') + 'Waiting for approval'
'Unapproved'
end
end
# Publish a screenshot from the moderation queue
def approve!
self.approved = true
self.save!
end
# Hide a screenshot from the public. Moderator level can do this.
def hide!
self.hidden = true
self.save!
end
def unhide!
self.hidden = false
self.save!
end
# Get the newest screenshots regardless of the package it belongs to
def self.newest
self.order(created_at: :desc)
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
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
end