Class: Dusen::Parser

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

Constant Summary collapse

TEXT_QUERY = 
/(?:(\-)?"([^"]+)"|(\-)?([\S]+))/
FIELD_QUERY = 
/(\-)?(\w+)\:#{TEXT_QUERY}/

Class Method Summary collapse

Class Method Details

.extract_field_query_tokens(query_string, query) ⇒ Object 



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# File 'lib/dusen/parser.rb', line 26

def self.extract_field_query_tokens(query_string, query)
  while query_string.sub!(FIELD_QUERY, '')
    field = $2
    value = "#{$4}#{$6}"
    exclude = "#{$1}" == "-"
    options = { :field => field, :value => value, :exclude => exclude }
    query << Token.new(options)
  end
end

.extract_text_query_tokens(query_string, query) ⇒ Object 



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# File 'lib/dusen/parser.rb', line 17

def self.extract_text_query_tokens(query_string, query)
  while query_string.sub!(TEXT_QUERY, '')
    value = "#{$2}#{$4}"
    exclude = "#{$1}#{$3}" == "-"
    options = { :field => 'text', :value => value, :exclude => exclude }
    query << Token.new(options)
  end
end

.parse(query_string) ⇒ Object 



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# File 'lib/dusen/parser.rb', line 9

def self.parse(query_string)
  query_string = query_string.dup # we are going to delete substrings in-place
  query = Query.new
  extract_field_query_tokens(query_string, query)
  extract_text_query_tokens(query_string, query)
  query
end