pulibrary / orangelight / 00dbc10b-d747-4ad7-b211-7b26d753abbb

class Orangelight::ProcessVocabularyComponent < Blacklight::MetadataFieldComponent

  def subjectify

    subjects = @field.values

    all_subjects = subjects.map { |subject| subject.split(QUERYSEP) }

    sub_array = subjects.map { |subject| accumulate_subsubjects(subject.split(QUERYSEP)) }

    subject_list = build_subject_list(all_subjects, sub_array)

    build_subject_ul(subject_list)

  end

private

  SEPARATOR = '—'

  QUERYSEP = '—'

  FACET_KEYS = {

    'lc_subject_display' => 'lc_subject_facet',

    'aat_s' => 'aat_genre_facet',

    'homoit_subject_display' => 'homoit_subject_facet',

    'homoit_genre_s' => 'homoit_genre_facet',

    'lcgft_s' => 'lcgft_genre_facet',

    'local_subject_display' => 'local_subject_facet',

    'fast_subject_display' => 'subject_facet',

    'rbgenr_s' => 'rbgenr_genre_facet',

    'siku_subject_display' => 'siku_subject_facet'

  }.freeze

  private_constant :SEPARATOR, :QUERYSEP, :FACET_KEYS

  def build_subject_ul(subject_list)

    content_tag :ul do

      subject_list.each { |subject| concat(content_tag(:li, subject, dir: subject.dir)) }

    end

  end

  def build_subject_list(all_subjects, sub_array)

    document_field = @field.values

    document_field.each_with_index do |_subject, index|

      sub_array_index = sub_array[index]

      lnk = build_search_subject_links(all_subjects[index], sub_array_index)

      lnk += build_browse_subject_link(index, sub_array_index.last).to_s

      document_field[index] = lnk.html_safe

    end

  end

  def build_search_subject_links(subjects, sub_array)

    subjects.each_with_index.reduce('') do |accumulator, (subsubject, j)|

      sub_array_j = sub_array[j]

      facet_key = FACET_KEYS[@field.key]

      if j == subjects.length - 1

        accumulator + build_search_subject_link(subsubject, sub_array_j, facet_key)

      else

        accumulator + build_search_subject_link(subsubject, sub_array_j, facet_key) + content_tag(:span, SEPARATOR, class: 'subject-level')

      end

    end

  end

  def build_search_subject_link(subsubject, sub_array_j, facet_key)

    link_to(subsubject,

            "/?f[#{facet_key}][]=#{CGI.escape StringFunctions.trim_punctuation(sub_array_j)}",

            class: 'search-subject',

            'data-original-title' => "Search: #{sub_array_j}")

  end

  def build_browse_subject_link(index, full_sub)

    return ' ' if fast_subjects_value?(index)

    facet_key = FACET_KEYS[@field.key]

    " #{build_browse_link(full_sub, facet_key)}"

  end

  def build_browse_link(full_sub, facet_key)

    link_to("[Browse]",

            "/browse/subjects?q=#{CGI.escape full_sub}&vocab=#{facet_key}",

            class: 'browse-subject',

            'data-original-title' => "Browse: #{full_sub}",

            'aria-label' => "Browse: #{full_sub}",

            dir: full_sub.dir.to_s)

  end

  def accumulate_subsubjects(spl_sub)

    spl_sub.reduce([]) do |accumulator, subsubject|

      accumulator.append([accumulator.last, subsubject].compact.join(QUERYSEP))

    end

  end

  def fast_subjects_value?(index)

    fast_subject_display_field = @field.document["fast_subject_display"]

    return false if fast_subject_display_field.nil?

    fast_subject_display_field.present? && fast_subject_display_field.include?(@field.values[index])

  end

end