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module Taxonomix
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extend ActiveSupport::Concern
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include DirtyAssociations
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included do
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taxonomy_join_table = "taxable_taxonomies"
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has_many taxonomy_join_table, :dependent => :destroy, :as => :taxable
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has_many :locations, :through => taxonomy_join_table, :source => :taxonomy,
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:conditions => "taxonomies.type='Location'", :validate => false
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has_many :organizations, :through => taxonomy_join_table, :source => :taxonomy,
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:conditions => "taxonomies.type='Organization'", :validate => false
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after_initialize :set_current_taxonomy
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scoped_search :in => :locations, :on => :name, :rename => :location, :complete_value => true
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scoped_search :in => :locations, :on => :id, :rename => :location_id, :complete_enabled => false, :only_explicit => true
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scoped_search :in => :organizations, :on => :name, :rename => :organization, :complete_value => true
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scoped_search :in => :organizations, :on => :id, :rename => :organization_id, :complete_enabled => false, :only_explicit => true
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dirty_has_many_associations :organizations, :locations
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validate :ensure_taxonomies_not_escalated, :if => Proc.new { User.current.nil? || !User.current.admin? }
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end
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module ClassMethods
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attr_accessor :which_ancestry_method, :which_location, :which_organization
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# default inner_method includes children (subtree_ids)
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def with_taxonomy_scope(loc = Location.current, org = Organization.current, inner_method = :subtree_ids)
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self.which_ancestry_method = inner_method
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self.which_location = Location.expand(loc) if SETTINGS[:locations_enabled]
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self.which_organization = Organization.expand(org) if SETTINGS[:organizations_enabled]
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scope = block_given? ? yield : where('1=1')
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scope = scope.where(:id => taxable_ids) if taxable_ids
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scope.readonly(false)
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end
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# default inner_method includes parents (path_ids)
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def with_taxonomy_scope_override(loc = nil, org = nil, inner_method = :path_ids)
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# need to .unscoped or default_scope {with_taxonomy_scope} overrides inner_method
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unscoped.with_taxonomy_scope(loc, org, inner_method)
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end
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def used_taxonomy_ids
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used_location_ids + used_organization_ids
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end
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def used_location_ids
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enforce_default
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return [] unless which_location && SETTINGS[:locations_enabled]
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get_taxonomy_ids(which_location, which_ancestry_method)
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end
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def used_organization_ids
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enforce_default
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return [] unless which_organization && SETTINGS[:organizations_enabled]
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get_taxonomy_ids(which_organization, which_ancestry_method)
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end
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def get_taxonomy_ids(taxonomy, method)
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Array(taxonomy).map { |t| t.send(method) + t.ancestor_ids }.flatten.uniq
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end
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# default scope is not called if we just use #scoped therefore we have to enforce quering
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# to get correct default values
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def enforce_default
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if which_ancestry_method.nil?
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self.scoped.limit(0).all
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end
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end
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def taxable_ids(loc = which_location, org = which_organization, inner_method = which_ancestry_method)
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if SETTINGS[:locations_enabled] && loc.present?
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inner_ids_loc = if Location.ignore?(self.to_s)
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self.pluck("#{table_name}.id")
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else
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inner_select(loc, inner_method)
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end
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end
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if SETTINGS[:organizations_enabled] && org.present?
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inner_ids_org = if Organization.ignore?(self.to_s)
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self.pluck("#{table_name}.id")
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else
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inner_select(org, inner_method)
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end
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end
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inner_ids = inner_ids_loc & inner_ids_org if (inner_ids_loc && inner_ids_org)
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inner_ids ||= inner_ids_loc if inner_ids_loc
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inner_ids ||= inner_ids_org if inner_ids_org
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# In the case of users we want the taxonomy scope to get both the users of the taxonomy and admins.
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inner_ids << admin_ids if inner_ids && self == User
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inner_ids
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end
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# taxonomy can be either specific taxonomy object or array of these objects
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# it can also be an empty array that means all taxonomies (user is not assigned to any)
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def inner_select(taxonomy, inner_method = which_ancestry_method)
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# always include ancestor_ids in inner select
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conditions = { :taxable_type => self.name }
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if taxonomy.present?
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taxonomy_ids = get_taxonomy_ids(taxonomy, inner_method)
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conditions.merge!(:taxonomy_id => taxonomy_ids)
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end
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TaxableTaxonomy.where(conditions).uniq.pluck(:taxable_id).compact
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end
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def admin_ids
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User.unscoped.where(:admin => true).pluck(:id) if self == User
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end
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end
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def set_current_taxonomy
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if self.new_record? && self.errors.empty?
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self.id = nil #fix for rails 3.2.8 bug that sets id = 1 on after_initialize. This can later be removed.
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self.locations << Location.current if add_current_location?
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self.organizations << Organization.current if add_current_organization?
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end
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end
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def add_current_organization?
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add_current_taxonomy?(:organization)
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end
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def add_current_location?
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add_current_taxonomy?(:location)
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end
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def add_current_taxonomy?(taxonomy)
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klass, association = case taxonomy
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when :organization
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[Organization, :organizations]
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when :location
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[Location, :locations]
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else
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raise ArgumentError, "unknown taxonomy #{taxonomy}"
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end
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current_taxonomy = klass.current
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Taxonomy.enabled?(taxonomy) && current_taxonomy && !self.send(association).include?(current_taxonomy)
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end
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def used_location_ids
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used_taxonomy_ids(:location_id)
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end
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def used_organization_ids
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used_taxonomy_ids(:organization_id)
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end
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def used_or_selected_location_ids
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(location_ids + used_location_ids).uniq
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end
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def used_or_selected_organization_ids
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(organization_ids + used_organization_ids).uniq
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end
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def children_of_selected_location_ids
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children_of_selected_taxonomy_ids(:locations)
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end
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def children_of_selected_organization_ids
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children_of_selected_taxonomy_ids(:organizations)
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end
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# Only administrator can choose empty taxonomies or taxonomies that they aren't assigned to,
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# other users can select only taxonomies they are granted to assign
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# and they can't leave the selection empty (which would mean global resource)
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#
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# we skip checking if user is global or it's not a new record and taxonomies were not changed
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# for existing records it would block saving global objects if taxonomies were not changed
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# for new records this would allow to create global objects for non global users
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def ensure_taxonomies_not_escalated
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taxonomies = []
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taxonomies << Organization if SETTINGS[:organizations_enabled]
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taxonomies << Location if SETTINGS[:locations_enabled]
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taxonomies.each do |taxonomy|
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assoc_base = taxonomy.to_s.downcase
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assoc = assoc_base.pluralize
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key = assoc_base + '_ids'
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next if (User.current.nil? || User.current.send("#{assoc}").empty?) || (!new_record? && !self.send("#{key}_changed?"))
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allowed = taxonomy.authorized("assign_#{assoc}", taxonomy).pluck(:id).to_set.union(self.send("#{key}_was"))
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tried = self.send(key).to_set
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if tried.empty? || !tried.subset?(allowed)
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errors.add key, _('Invalid %s selection, you must select at least one of yours') % _(assoc)
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end
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end
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end
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protected
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def taxonomy_foreign_key_conditions
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if self.respond_to?(:taxonomy_foreign_conditions)
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taxonomy_foreign_conditions
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else
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{ "#{self.class.base_class.to_s.tableize.singularize}_id".to_sym => id }
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end
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end
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def used_taxonomy_ids(type)
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return [] if new_record?
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Host::Base.where(taxonomy_foreign_key_conditions).uniq.pluck(type).compact
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end
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def children_of_selected_taxonomy_ids(assoc)
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return [] if new_record?
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ids = []
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send(assoc).each do |tax|
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ids << tax.descendant_ids
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end
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ids.flatten.compact.uniq
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end
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end
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