ontohub/lib/autocomplete.rb

	autocomplete.rb revision 48e4022571f5143358d6a8f54e42894ba9b654c0
#
# Autocompleter that searches the given scopes and excludes optional ids
#
class Autocomplete

  class InvalidScope < Exception; end

  SCOPES = %w( user team )

  def initialize
    # scope_name => excluded_ids
    @scopes = {}
  end

  # adds a scope to the autocompleter
  def add_scope(name, without_ids="")
    raise InvalidScope, "invalid scope: #{name}" unless SCOPES.include?(name)

    without_ids   = without_ids.to_s.split(",") unless without_ids.is_a?(Array)
    @scopes[name] = without_ids
  end

  # search the added scopes
  def search(query, limit = 10)
    result = []

    @scopes.each do |name, without_ids|

      # get class of scope
      scope = name.camelize.constantize

      # exclude the given ids
      scope = scope.without_ids(without_ids) if without_ids.any?

      # finally apply the search scope
      scope = scope.autocomplete_search(query)

      result += scope.limit(limit).all
    end

    result
  end

end