Class: Volt::Query::Normalizer

Inherits:
Object
  • Object
show all
Defined in:
lib/volt/models/persistors/query/normalizer.rb

Overview

Normalizes queries so queries that are the same have the same order and parts

Class Method Summary collapse

Class Method Details

.merge_finds_and_move_to_front(query) ⇒ Object 



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# File 'lib/volt/models/persistors/query/normalizer.rb', line 13

def self.merge_finds_and_move_to_front(query)
  # Map first parts to string
  query = query.map {|v| v[0] = v[0].to_s ; v }
  has_find = query.find {|v| v[0] == 'find' }

  if has_find
    # merge any finds
    merged_find_query = {}
    query = query.reject do |query_part|
      if query_part[0] == 'find'
        # on a find, merge into finds
        find_query = query_part[1]
        merged_find_query.merge!(find_query) if find_query

        # reject
        true
      else
        false
      end
    end

    # Add finds to the front
    query.insert(0, ['find', merged_find_query])
  else
    # No find was done, add it in the first position
    query.insert(0, ['find'])
  end

  query
end

.normalize(query) ⇒ Object 



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# File 'lib/volt/models/persistors/query/normalizer.rb', line 5

def self.normalize(query)
  query = merge_finds_and_move_to_front(query)

  query = reject_skip_zero(query)

  query
end

.reject_skip_zero(query) ⇒ Object 



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# File 'lib/volt/models/persistors/query/normalizer.rb', line 44

def self.reject_skip_zero(query)
  query.reject do |query_part|
    query_part[0] == 'skip' && query_part[1] == 0
  end
end