debshots/app/models/package.rb

115 lines
3.7 KiB
Ruby

require 'open-uri' # allows to load URLs using open()
require 'json'
require 'deb_importer'
class Package < ApplicationRecord
# PostgreSQL-based full-text search:
# https://github.com/Casecommons/pg_search
include PgSearch::Model
# TODO: Make search weighted on users' rating
pg_search_scope :general_search,
# :against => [:name, :description, :long_description],
against: [
[:name, 'A'],
[:description, 'B'],
[:long_description, 'C']
],
using: {
tsearch: { dictionary: 'english' }
}
# I am using "destroy_all" here so that when a package gets destroys the
# callbacks for all dependent screenshots are executed - thus removing the
# screenshot files from disk.
has_many :screenshots,
-> { order(id: :desc) },
inverse_of: :package,
dependent: :destroy
# default_scope {
# order('name ASC')
# }
# Define the parameter(s) used for a /package/:name URL to an instance of this model
def to_param
name
end
# Return the first paragraph of the long description.
def long_description_first_paragraph
long_description.split(/\n\.\n/).first if long_description
end
# Return a query of all packages that have screenshots
def self.with_screenshots
# Query for all packages who's ID appears in a screenshot's "package_id" field
subselect = Screenshot.select(:package_id)
where(id: subselect)
end
# Return a query of all packages that have approved screenshots
def self.with_public_screenshots
# Query for all packages who's ID appears in a screenshot's "package_id" field
subselect = Screenshot.visible.approved.select(:package_id)
where(id: subselect)
end
# Return a list of packages that have screenshots to be moderated
def self.need_moderation
Package.joins(:screenshots).where('screenshots.approved=false').distinct(:name)
end
# Return a query of all packages that do not have screenshots
def self.without_screenshots
# Query for all packages who's ID does not appear in a screenshot's "package_id" field
subselect = Screenshot.select(:package_id)
where.not(id: subselect)
end
# Get all screenshots and have them sorted descendingly by their version number (Debian style).
def screenshots_sorted_by_version
screenshots.approved.to_a.sort { |x, y| version_compare(x.version, y.version) }
end
# Return all approved screenshots for this package
def approved_screenshots
screenshots.approved
end
# Return the newest screenshot that is not newer than the given version.
# This algorithm collects all image
# versions of a package and determines the (second) newest version.
# E.g. if there are version 1.0 and 2.0 and the user is looking for
# a screenshot of version 1.5 then the 1.0 version is returned.
# This way the user does not see a screenshot of version 2.0 because
# 2.0 might contain features that were not there in version 1.5.
def best_screenshot_for_version(version)
sorted_screenshots = screenshots_sorted_by_version
sorted_screenshots.each do |ss|
logger.debug { "Comparing version #{version} against #{ss.version}" }
return ss if version_compare(version, ss.version) <= 0
end
sorted_screenshots.last
end
# Return the part of the version up to the first - or +
def upstream_version
version.split(/[-+]/).first
end
private
def version_compare(x, y)
x = '0' unless x.present?
y = '0' unless y.present?
version_x = DebImporter::Version.new(x)
version_y = DebImporter::Version.new(y)
if version_x < version_y
1
elsif version_x > version_y
-1
else
0
end
end
end