Class: Fiona7::FacetBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/fiona7/facet_builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(facet_params, query, klass) ⇒ FacetBuilder 



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# File 'lib/fiona7/facet_builder.rb', line 5

def initialize(facet_params, query, klass)
  @query        = query
  @klass        = klass

  @attribute    = facet_params[:attribute]

  @limit        = [facet_params[:limit] || 10, 100].min # default = 10, limit <= 100
  @fake_limit   = 100
  @include_objs = facet_params[:include_objs] || false

  @known_values = Set.new
  @facets       = []
  @next_facets  = []
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/fiona7/facet_builder.rb', line 20

def build
  @facets << fetch_more_facets until limit_reached or !more_facets_available

  # adjust totals
  for index in 0.upto(@facets.length-2)
    next_facet_total = @facets[index+1].first[:total] rescue 0
    @facets[index].each do |facet|
      facet[:total] -= next_facet_total
    end
  end

  # flatten
  @facets.flatten!

  # sort
  @facets.sort_by! {|f| f[:total] }.reverse!

  # delete superfluous elements
  @facets.slice!(@limit, @facets.length)

  # add included objs
  if @include_objs
    @facets.each do |facet|
      include_objs_query = @query.dup
      include_objs_query << {field: @attribute, operator: :__in__, value: facet[:value]}
      search = VeritySearchEngine.new(@klass, include_objs_query, 0, @include_objs, @attribute, :desc)
      facet[:results] = search.results.map {|o_id| {id: o_id.to_s}}
      # this gives a true total!
      facet[:total] = search.total
    end
  else
    @facets.each do |facet|
      facet[:results] = []
    end
  end

  @facets
end