Class: Things2THL::ThingsNode

Inherits:
Object
  • Object
show all
Defined in:
lib/Things2THL.rb

Overview

Wrapper around an AS Things node to provide easier access to its props For each property ‘prop’ of the node, it defines two methods: prop() returns the value, converting :missing_value to nil prop?() returns true/false to indicate if the value is set and is not :missing_value Not all the AS properties respond properly to get(), so not all of the auto-defined methods will work properly.

Constant Summary collapse

@@defined = 
{}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ ThingsNode

Returns a new instance of ThingsNode.



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# File 'lib/Things2THL.rb', line 199

def initialize(node)
  @node = node
  @values = {}
  return unless @@defined.empty?
  (node.properties + node.elements).each do |prop|
    next if @@defined.has_key?(prop)
    puts "Defining ThingsNode.#{prop}" if $DEBUG
    @@defined[prop]=true
    case prop
    # For area, project and some others, convert the result to a ThingsNode as well
    when 'area', 'project', 'areas', 'projects', 'parent_tag', 'delegate'
      ThingsNode.class_eval <<-EOF
      def #{prop}
        return @values['#{prop}'] if @values.has_key?('#{prop}')
        value=node.#{prop}.get
          @values['#{prop}']=case value
                             when nil, :missing_value
                               nil
                             else
                               ThingsNode.new(value)
                             end
      end
      def #{prop}?
        !!#{prop}
      end
      EOF
    when 'to_dos', 'tags'
      # For to_dos and tags, map the returned array to ThingsNode as well
      ThingsNode.class_eval <<-EOF
      def #{prop}
        return @values['#{prop}'] if @values.has_key?('#{prop}')
        value=node.#{prop}.get
          @values['#{prop}']=case value
                             when nil, :missing_value
                               nil
                             else
                               value.map { |n| ThingsNode.new(n) }
                             end
      end
      def #{prop}?
        !!#{prop}
      end
      EOF
    else
      ThingsNode.class_eval <<-EOF
      def #{prop}
        return @values['#{prop}'] if @values.has_key?('#{prop}')
        value=node.#{prop}.get
        value=nil if value==:missing_value
        @values['#{prop}']=value
      end
      def #{prop}?
        !!#{prop}
      end
      EOF
      # Some smarts for specific attributes
      if prop == 'class_'
        ThingsNode.class_eval 'alias_method :type, :class_'
      end
    end
  end
end

Instance Attribute Details

#node ⇒ Object

Returns the value of attribute node.



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# File 'lib/Things2THL.rb', line 195

def node
  @node
end