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class LookupKey < ActiveRecord::Base
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include Authorization
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KEY_TYPES = %w( string boolean integer real array hash yaml json )
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VALIDATOR_TYPES = %w( regexp list )
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TRUE_VALUES = [true, 1, '1', 't', 'T', 'true', 'TRUE', 'on', 'ON', 'yes', 'YES', 'y', 'Y'].to_set
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FALSE_VALUES = [false, 0, '0', 'f', 'F', 'false', 'FALSE', 'off', 'OFF', 'no', 'NO', 'n', 'N'].to_set
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KEY_DELM = ","
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EQ_DELM = "="
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serialize :default_value
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belongs_to :puppetclass
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has_many :environment_classes, :dependent => :destroy
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has_many :environments, :through => :environment_classes, :uniq => true
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has_one :param_class, :through => :environment_classes, :class_name => 'Puppetclass', :source => :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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before_validation :validate_and_cast_default_value
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validates_uniqueness_of :key, :unless => Proc.new{|p| p.is_param?}
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validates_presence_of :key
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validates_presence_of :puppetclass_id, :unless => Proc.new {|k| k.is_param?}
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validates_inclusion_of :validator_type, :in => VALIDATOR_TYPES, :message => "invalid", :allow_blank => true, :allow_nil => true
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validates_inclusion_of :key_type, :in => KEY_TYPES, :message => "invalid", :allow_blank => true, :allow_nil => true
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validate :validate_list, :validate_regexp
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validates_associated :lookup_values
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validate :ensure_type
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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 :on => :override, :complete_value => {:true => true, :false => false}
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scoped_search :in => :param_class, :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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"#{id}-#{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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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 if lookup_values.any?
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default_value
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end
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def path
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path = read_attribute(:path)
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path.blank? ? array2path(Setting["Default_variables_Lookup_Path"]) : path
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end
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def path=(v)
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using_default = v.tr("\r","") == array2path(Setting["Default_variables_Lookup_Path"])
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write_attribute(:path, using_default ? nil : v)
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end
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def default_value_before_type_cast
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value_before_type_cast default_value
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end
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def value_before_type_cast val
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case validator_type.to_sym
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when :json
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val = JSON.dump val
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when :yaml, :hash
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val = YAML.dump val
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val.sub! /\A---\s*$\n/, ''
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when :array
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val = val.inspect
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end unless validator_type.blank?
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val
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end
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# Returns the casted value, or raises a TypeError
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def cast_validate_value value
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method = "cast_value_#{validator_type}".to_sym
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return value unless self.respond_to? method, true
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self.send(method, value) rescue raise TypeError
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end
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def as_json(options={})
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super({:only => [:key, :is_param, :required, :override, :description, :default_value, :id]}.merge(options))
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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.where(:host_id => host.id, :fact_name_id => fn.id).first.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 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_and_cast_default_value
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return true if default_value.nil?
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begin
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self.default_value = cast_validate_value self.default_value
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true
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rescue
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errors.add(:default_value, "is invalid")
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false
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end
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end
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def cast_value_boolean value
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return true if TRUE_VALUES.include? value
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return false if FALSE_VALUES.include? value
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raise TypeError
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end
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def cast_value_integer value
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return value.to_i if value.is_a?(Numeric)
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if value.is_a?(String)
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if value =~ /^0x[0-9a-f]+$/i
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value.to_i(16)
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elsif value =~ /^0[0-7]+$/
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value.to_i(8)
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elsif value =~ /^-?\d+$/
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value.to_i
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else
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raise TypeError
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end
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end
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end
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def cast_value_real value
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return value if value.is_a? Numeric
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if value.is_a?(String)
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if value =~ /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][-+]?\d+)?$/
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value.to_f
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else
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cast_value_integer value
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end
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end
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end
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def load_yaml_or_json value
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return value unless value.is_a? String
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begin
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JSON.load value
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rescue
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YAML.load value
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end
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end
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def cast_value_array value
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return value if value.is_a? Array
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return value.to_a if not value.is_a? String and value.is_a? Enumerable
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value = load_yaml_or_json value
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raise TypeError unless value.is_a? Array
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value
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end
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def cast_value_hash value
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return value if value.is_a? Hash
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value = load_yaml_or_json value
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raise TypeError unless value.is_a? Hash
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value
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end
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def cast_value_yaml value
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value = YAML.load value
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end
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def cast_value_json value
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value = JSON.load value
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end
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def ensure_type
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if puppetclass_id.present? and is_param?
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self.errors.add(:base, 'Global variable or class Parameter, not both')
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end
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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_list
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return true unless (validator_type == 'list')
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errors.add(:default_value, "#{default_value} is not one of #{validator_rule}") and return false unless validator_rule.split(KEY_DELM).map(&:strip).include?(default_value)
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end
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end
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