Module: PreviewHelper

Defined in:
app/helpers/preview_helper.rb

Constant Summary collapse

AVAILABLE_PRISM_LANGUAGES = 
%w[ruby erb haml]
FALLBACK_LANGUAGE = 
"ruby"

Instance Method Summary collapse

Instance Method Details

#find_template_data(lookup_context:, template_identifier:) ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# 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.config.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

    raise ViewComponent::NoMatchingTemplatesForPreviewError.new(template_identifier) if matching_templates.empty?
    raise ViewComponent::MultipleMatchingTemplatesForPreviewError.new(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 



7
8
9
10
11
 
# File 'app/helpers/preview_helper.rb', line 7

def preview_source
  return if @render_args.nil?

  render "preview_source"
end