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class LookupKey < ActiveRecord::Base
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VALIDATION_TYPES = %w( regexp list )
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KEY_DELM = ","
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EQ_DELM = "="
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belongs_to :puppetclass
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has_many :lookup_values, :dependent => :destroy, :inverse_of => :lookup_key
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accepts_nested_attributes_for :lookup_values, :reject_if => lambda { |a| a[:value].blank? }, :allow_destroy => true
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validates_uniqueness_of :key
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validates_presence_of :key, :puppetclass_id
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validates_inclusion_of :validator_type, :in => VALIDATION_TYPES, :message => "invalid", :allow_blank => true, :allow_nil => true
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validate :validate_range_rule, :validate_range, :validate_list, :validate_regexp
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validates_associated :lookup_values
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before_save :sanitize_path
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scoped_search :on => :key, :complete_value => true, :default_order => true
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scoped_search :in => :puppetclass, :on => :name, :rename => :puppetclass, :complete_value => true
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scoped_search :in => :lookup_values, :on => :value, :rename => :value, :complete_value => true
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default_scope :order => 'LOWER(lookup_keys.key)'
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def to_param
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key
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end
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def to_s
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key
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end
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#TODO: use SQL coalesce to minimize the amount of queries
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def value_for host
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path2matches(host).each do |match|
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if v = lookup_values.find_by_match(match)
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return v.value
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end
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end
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default_value
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end
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def path
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read_attribute(:path) || array2path(Setting["Default_variables_Lookup_Path"])
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end
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def path=(v)
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return if v == array2path(Setting["Default_variables_Lookup_Path"])
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write_attribute(:path, v)
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end
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private
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# Generate possible lookup values type matches to a given host
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def path2matches host
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raise "Invalid Host" unless host.is_a?(Host)
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matches = []
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path_elements.each do |rule|
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match = []
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rule.each do |element|
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match << "#{element}#{EQ_DELM}#{attr_to_value(host,element)}"
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end
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matches << match.join(KEY_DELM)
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end
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matches
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end
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# translates an element such as domain to its real value per host
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# tries to find the host attribute first, parameters and then fallback to a puppet fact.
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def attr_to_value host, element
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# direct host attribute
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return host.send(element) if host.respond_to?(element)
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# host parameter
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return host.host_params[element] if host.host_params.include?(element)
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# fact attribute
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if fn = host.fact_names.first(:conditions => {:name => element})
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return FactValue.first(:conditions => {:host_id => host.id, :fact_name_id => fn.id}).value
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end
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end
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def path_elements
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path.split.map do |paths|
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paths.split(KEY_DELM).map do |element|
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element
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end
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end
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end
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def sanitize_path
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self.path = path.tr("\s","").downcase unless path.blank?
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end
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def validate_range_rule
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return true unless (validator_type == 'range')
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self.errors.add(:validator_rule, "is invalid") and return false unless validator_rule =~ /^(\d|"[a-z]"|'[a-z]')+\.\.(\d|"[b-z]"|'[b-z]')+$/
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end
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def array2path array
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raise "invalid path" unless array.is_a?(Array)
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array.map do |sub_array|
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sub_array.is_a?(Array) ? sub_array.join(KEY_DELM) : sub_array
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end.join("\n")
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end
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def validate_regexp
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return true unless (validator_type == 'regexp')
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errors.add(:default_value, "is invalid") and return false unless (default_value =~ /#{validator_rule}/)
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end
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def validate_range
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return true unless (validator_type == 'range')
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errors.add(:default_value, "not within range #{validator_rule}") and return false unless eval(validator_rule).include?(default_value)
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end
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def validate_list
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return true unless (validator_type == 'list')
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errors.add(:default_value, "not in list") and return false unless validator_rule.split(KEY_DELM).map(&:strip).include?(default_value)
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end
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def as_json(options={})
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super({:only => [:key, :description, :default_value, :id]}.merge(options))
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end
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end
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