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class Taxonomy < ActiveRecord::Base
include Authorizable

include NestedAncestryCommon

serialize :ignore_types, Array

validates_lengths_from_database
belongs_to :user
before_destroy EnsureNotUsedBy.new(:hosts)
after_create :assign_taxonomy_to_user

has_many :taxable_taxonomies, :dependent => :destroy
has_many :users, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'User'
has_many :smart_proxies, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'SmartProxy'
has_many :compute_resources, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'ComputeResource'
has_many :media, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Medium'
has_many :provisioning_templates, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'ProvisioningTemplate'
has_many :ptables, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Ptable'
has_many :domains, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Domain'
has_many :realms, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Realm'
has_many :hostgroups, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Hostgroup'
has_many :environments, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Environment'
has_many :subnets, :through => :taxable_taxonomies, :source => :taxable, :source_type => 'Subnet'

validate :check_for_orphans, :unless => Proc.new {|t| t.new_record?}

validates :name, :presence => true, :uniqueness => {:scope => [:ancestry, :type], :case_sensitive => false}
validates :title, :presence => true, :uniqueness => {:scope => :type}

before_validation :sanitize_ignored_types
after_create :assign_default_templates

scoped_search :on => :description, :complete_enabled => :false, :only_explicit => true

delegate :import_missing_ids, :inherited_ids, :used_and_selected_or_inherited_ids, :selected_or_inherited_ids,
:non_inherited_ids, :used_or_inherited_ids, :used_ids, :to => :tax_host

default_scope -> { order(:title) }

scope :completer_scope, lambda{|opts|
if opts[:controller] == 'organizations'
Organization.completer_scope opts
elsif opts[:controller] == 'locations'
Location.completer_scope opts
end
}

def self.locations_enabled
enabled?(:location)
end

def self.organizations_enabled
enabled?(:organization)
end

def self.no_taxonomy_scope
as_taxonomy nil, nil do
yield if block_given?
end
end

def self.as_taxonomy(org, location)
Organization.as_org org do
Location.as_location location do
yield if block_given?
end
end
end

def self.enabled?(taxonomy)
case taxonomy
when :organization
SETTINGS[:organizations_enabled]
when :location
SETTINGS[:locations_enabled]
else
raise ArgumentError, "unknown taxonomy #{taxonomy}"
end
end

def self.enabled_taxonomies
%w(locations organizations).select { |taxonomy| SETTINGS["#{taxonomy}_enabled".to_sym] }
end

def self.ignore?(taxable_type)
Array.wrap(self.current).each do |current|
return true if current.ignore?(taxable_type)
end
false
end

# if taxonomy e.g. organization was not set by current context (e.g. Any organization)
# then we have to compute what this context mean for current user (in what organizations
# is he assigned to)
#
# if user is not assigned to any organization then empty array is returned which means
# that we should use all organizations
#
# if user is admin we we return the original value since it does not need any additional scoping
def self.expand(value)
if value.blank? && User.current.present? && !User.current.admin?
value = self.send("my_#{self.to_s.underscore.pluralize}").all
end
value
end

def ignore?(taxable_type)
if ignore_types.empty?
false
else
ignore_types.include?(taxable_type.classify)
end
end

def self.all_import_missing_ids
all.each do |taxonomy|
taxonomy.import_missing_ids
end
end

def self.all_mismatcheds
includes(:hosts).map { |taxonomy| taxonomy.mismatches }
end

def dup
new = super
new.name = ""
new.users = users
new.environments = environments
new.smart_proxies = smart_proxies
new.subnets = subnets
new.compute_resources = compute_resources
new.provisioning_templates = provisioning_templates
new.media = media
new.domains = domains
new.realms = realms
new.media = media
new.hostgroups = hostgroups
new
end

# overwrite *_ids since need to check if ignored? - don't overwrite location_ids and organizations_ids since these aren't ignored
(TaxHost::HASH_KEYS - [:location_ids, :organizations_ids]).each do |key|
# def domain_ids
# if ignore?("Domain")
# Domain.pluck(:id)
# else
# self.taxable_taxonomies.where(:taxable_type => "Domain").pluck(:taxable_id)
# end
define_method(key) do
klass = hash_key_to_class(key)
if ignore?(klass)
return User.unscoped.except_admin.except_hidden.map(&:id) if klass == "User"
return klass.constantize.pluck(:id)
else
taxable_taxonomies.where(:taxable_type => klass).pluck(:taxable_id)
end
end
end

def expire_topbar_cache(sweeper)
(users+User.only_admin).each { |u| u.expire_topbar_cache(sweeper) }
end

# returns self and parent parameters as a hash
def parameters(include_source = false)
hash = {}
ids = ancestor_ids
ids << id unless new_record? or self.frozen?
# need to pull out the locations to ensure they are sorted first,
# otherwise we might be overwriting the hash in the wrong order.
elements = ids.size == 1 ? [self] : self.class.sort_by_ancestry(self.class.includes("#{type.downcase}_parameters".to_sym).find(ids))
elements.each do |el|
el.send("#{type.downcase}_parameters".to_sym).each {|p| hash[p.name] = include_source ? {:value => p.value, :source => sti_name, :safe_value => p.safe_value, :source_name => el.title} : p.value }
end
hash
end

private

delegate :need_to_be_selected_ids, :selected_ids, :used_and_selected_ids, :mismatches, :missing_ids, :check_for_orphans,
:to => :tax_host

def assign_default_templates
Template.where(:default => true).each do |template|
self.send("#{template.class.to_s.underscore.pluralize}") << template
end
end

def sanitize_ignored_types
self.ignore_types ||= []
self.ignore_types = self.ignore_types.compact.uniq - ["0"]
end

def tax_host
@tax_host ||= TaxHost.new(self)
end

def hash_key_to_class(key)
key.to_s.gsub(/_ids?\Z/, '').classify
end

def assign_taxonomy_to_user
return if User.current.nil? || User.current.admin
TaxableTaxonomy.create(:taxonomy_id => self.id, :taxable_id => User.current.id, :taxable_type => 'User')
end
end
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