Class: Shades::QueryParser

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

Class Method Summary collapse

Class Method Details

.categorizations_from_nodes(nodes) ⇒ Object 



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# File 'lib/shades/queryparser.rb', line 84

def self.categorizations_from_nodes(nodes)
  nodes.map { |categorization|
    categorization.name
  }
end

.parse(qs, query_factory = Query) ⇒ Object 



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# File 'lib/shades/queryparser.rb', line 60

def self.parse(qs, query_factory = Query)
  @parser_class ||= Treetop.load(File.join(File.dirname(__FILE__), "query.treetop"))

  parser = @parser_class.new
  unless query_node = parser.parse(qs)
    raise ArgumentError, "Cannot parse query at character #{parser.index}"
  end

  query_factory.new(
    :rollups         => rollups_from_nodes(query_node.rollup_nodes),
    :categorizations => categorizations_from_nodes(query_node.categorization_nodes),
    :sorting         => sorting_from_nodes(query_node.sorting_nodes)
  )
end

.rollups_from_nodes(nodes) ⇒ Object 



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# File 'lib/shades/queryparser.rb', line 75

def self.rollups_from_nodes(nodes)
  nodes.flat_map { |node|
    stat = Stats::StatsType.get(node.stat_type_name)
    node.measure_names.map { |measure_name|
      { :stat => stat, :measure => measure_name }
    }
  }
end

.sorting_from_nodes(nodes) ⇒ Object 



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# File 'lib/shades/queryparser.rb', line 90

def self.sorting_from_nodes(nodes)
  nodes.map { |sorting|
    { :key => sorting.name, :asc => true }
  }
end