Module: PreviewHelper

Defined in:
app/helpers/preview_helper.rb

Constant Summary collapse

AVAILABLE_PRISM_LANGUAGES = 
["ruby", "erb", "haml"]
FALLBACK_LANGUAGE = 
"ruby"

Instance Method Summary collapse

Instance Method Details

#find_template_data(lookup_context:, template_identifier:) ⇒ Object 



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# File 'app/helpers/preview_helper.rb', line 13

def find_template_data(lookup_context:, template_identifier:)
  template = lookup_context.find_template(template_identifier)

  if Rails.version.to_f >= 6.1 || template.source.present?
    {
      source: template.source,
      prism_language_name: prism_language_name_by_template(template: template)
    }
  else
    # Fetch template source via finding it through preview paths
    # to accomodate source view when exclusively using templates
    # for previews for Rails < 6.1.
    all_template_paths = ViewComponent::Base.preview_paths.map do |preview_path|
      Dir.glob("#{preview_path}/**/*")
    end.flatten

    # Search for templates the contain `html`.
    matching_templates = all_template_paths.find_all do |path|
      path =~ /#{template_identifier}*.(html)/
    end

    # In-case of a conflict due to multiple template files with
    # the same name
    raise "found 0 matches for templates for #{template_identifier}." if matching_templates.empty?
    raise "found multiple templates for #{template_identifier}." if matching_templates.size > 1

    template_file_path = matching_templates.first
    template_source = File.read(template_file_path)
    prism_language_name = prism_language_name_by_template_path(template_file_path: template_file_path)

    {
      source: template_source,
      prism_language_name: prism_language_name
    }
  end
end

#preview_source ⇒ Object 



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# File 'app/helpers/preview_helper.rb', line 7

def preview_source
  return if @render_args.nil?

  render "preview_source"
end