Class: SearchResultsController

Inherits:
ApplicationController show all
Includes:
DatasetInitialization
Defined in:
app/controllers/search_results_controller.rb

Overview

Copyright 2011-2013 innoQ Deutschland GmbH

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Class Method Summary collapse

Instance Method Summary collapse

Methods included from DatasetInitialization

#datasets_as_json, #init_datasets

Class Method Details

.prepare_basic_variables(controller) ⇒ Object 



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# File 'app/controllers/search_results_controller.rb', line 164

def self.prepare_basic_variables(controller)
  langs = Iqvoc.all_languages.each_with_object({}) do |lang, hsh|
    lang ||= 'none'
    hsh[lang] = I18n.t("languages.#{lang}", default: lang)
  end
  controller.instance_variable_set(:@available_languages, langs)

  # AR requires mapping to existing object attributes so that value is mapped to the unused status attribute to keep the information
  collections = Iqvoc::Collection.base_class.joins(:pref_labels).order('value').select('value AS status, concepts.origin')
  controller.instance_variable_set(:@collections, collections)

  # default search params
  controller.params['t'] = Iqvoc.searchable_class_names.values.first if controller.params['t'].nil?
  controller.params['qt'] = 'contains' if controller.params['qt'].nil?
  controller.params['for'] = 'all' if controller.params['for'].nil?
  controller.params['l'] = langs.keys if controller.params['l'].nil?
  controller.params['include_expired'] = (controller.params['include_expired'] == "true")
end

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/search_results_controller.rb', line 66

def index
  authorize! :read, Concept::Base
  # TODO: requires a dedicated :search permission because this covers more
  # than just concepts

  self.class.prepare_basic_variables(self)

  # Map short params to their log representation
  { t: :type,
    q: :query,
    l: :languages,
    qt: :query_type,
    c: :collection_origin,
    ds: :datasets }.each do |short, long|
    params[long] ||= params[short]
  end

  # Delete parameters which should not be included into generated urls (e.g.
  # in rdf views)
  request.query_parameters.delete('commit')
  request.query_parameters.delete('utf8')

  @datasets = init_datasets

  @remote_result_collections = []

  if params[:query]
    if params[:query].blank? and request.format.to_sym.in? [:ttl, :nt, :rdf]
      # support blank searches via web ui, but not for api requests
      respond_to do |format|
        format.any(:ttl, :rdf, :nt) do
          head :bad_request
        end
      end
    else
      # Deal with language parameter patterns
      languages = []
      # Either "l[]=de&l[]=en" as well as "l=de,en" should be possible
      if params[:languages].respond_to?(:each) && params[:languages].include?('none')
        # Special treatment for the "nil language"
        languages << nil
      elsif params[:languages].respond_to?(:split)
        languages = params[:languages].split(',')
      end

      # Ensure a valid class was selected
      unless klass = Iqvoc.searchable_class_names.detect { |key, value| value == params[:type] }.try(:first)
        raise "'#{params[:type]}' is not a searchable class! Must be one of " + Iqvoc.searchable_class_names.keys.join(', ')
      end
      klass = klass.constantize

      @results = klass.single_query(params.merge({ languages: languages.flatten }))
                      .filter { |search_result| result_allowed?(search_result) }

      if params[:limit] && Iqvoc.unlimited_search_results
        @results = @results.per(params[:limit].to_i)
      end

      if params[:datasets] && datasets = @datasets.select { |a| params[:datasets].include?(a.name) }
        @results = SearchResultCollection.new(@results)
        datasets.each do |dataset|
          results = dataset.search(params)
          if results
            @results = @results + results
          else
            flash.now[:error] ||= []
            flash.now[:error] << t('txt.controllers.search_results.remote_source_error', source: dataset)
          end
        end
        @results = @results.sort { |x, y| x.to_s <=> y.to_s }
      end

      @results = Kaminari.paginate_array(@results)
      @results = @results.page(params[:page])

      respond_to do |format|
        format.html {
          if request.headers['Accept'] == 'text/html; fragment=true'
            render template: 'search_results/_result_list', layout: false
          else
            render :index, layout: with_layout?
          end
        }
        format.any(:ttl, :rdf, :nt)
      end
    end
  else
    respond_to do |format|
      format.html do
        render :index
      end
      format.any(:ttl, :rdf, :nt) do
        head :bad_request
      end
    end
  end
end