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require 'set'
module Paperclip
class << self
attr_accessor :classes_with_attachments
attr_writer :registered_attachments_styles_path
def registered_attachments_styles_path
@registered_attachments_styles_path ||= Rails.root.join('public/system/paperclip_attachments.yml').to_s
end
end
self.classes_with_attachments = Set.new
# Get list of styles saved on previous deploy (running rake paperclip:refresh:missing_styles)
def self.get_registered_attachments_styles
YAML.load_file(Paperclip.registered_attachments_styles_path)
rescue Errno::ENOENT
nil
end
private_class_method :get_registered_attachments_styles
def self.save_current_attachments_styles!
File.open(Paperclip.registered_attachments_styles_path, 'w') do |f|
YAML.dump(current_attachments_styles, f)
end
end
# Returns hash with styles for all classes using Paperclip.
# Unfortunately current version does not work with lambda styles:(
# {
# :User => {:avatar => [:small, :big]},
# :Book => {
# :cover => [:thumb, :croppable]},
# :sample => [:thumb, :big]},
# }
# }
def self.current_attachments_styles
Hash.new.tap do |current_styles|
Paperclip.classes_with_attachments.each do |klass|
klass.attachment_definitions.each do |attachment_name, attachment_attributes|
# TODO: is it even possible to take into account Procs?
next if attachment_attributes[:styles].kind_of?(Proc)
attachment_attributes[:styles].try(:keys).try(:each) do |style_name|
klass_sym = klass.to_s.to_sym
current_styles[klass_sym] ||= Hash.new
current_styles[klass_sym][attachment_name.to_sym] ||= Array.new
current_styles[klass_sym][attachment_name.to_sym] << style_name.to_sym
current_styles[klass_sym][attachment_name.to_sym].map!(&:to_s).sort!.map!(&:to_sym).uniq!
end
end
end
end
end
private_class_method :current_attachments_styles
# Returns hash with styles missing from recent run of rake paperclip:refresh:missing_styles
# {
# :User => {:avatar => [:big]},
# :Book => {
# :cover => [:croppable]},
# }
# }
def self.missing_attachments_styles
current_styles = current_attachments_styles
registered_styles = get_registered_attachments_styles
Hash.new.tap do |missing_styles|
current_styles.each do |klass, attachment_definitions|
attachment_definitions.each do |attachment_name, styles|
registered = registered_styles[klass][attachment_name] rescue []
missed = styles - registered
if missed.present?
klass_sym = klass.to_s.to_sym
missing_styles[klass_sym] ||= Hash.new
missing_styles[klass_sym][attachment_name.to_sym] ||= Array.new
missing_styles[klass_sym][attachment_name.to_sym].concat(missed.to_a)
missing_styles[klass_sym][attachment_name.to_sym].map!(&:to_s).sort!.map!(&:to_sym).uniq!
end
end
end
end
end
end
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