module ApplicationHelper

# File app/helpers/application_helper.rb, line 45
def app_version
  return APP_VERSION if defined?(APP_VERSION) && APP_VERSION.present?

  if Rails.env.local?
    version = `git rev-parse --abbrev-ref HEAD 2>/dev/null`.strip
    return nil if version.blank? || version == "HEAD"
    return version
  end

  nil
end

# File app/helpers/application_helper.rb, line 74
def grid_column_class(count)
  if (count % 5).zero?
    "one-fifth"
  elsif (count % 3).zero?
    "one-third"
  else
    "one-quarter"
  end
end

# File app/helpers/application_helper.rb, line 4
def h1(text = nil, size: "l", **options, &block)
  title_text = options.delete(:page_title) { text }

  options[:class] = ["nhsuk-heading-#{size}", options[:class]].compact.join(
    " "
  )

  content_for(:page_title, title_text) unless content_for?(:page_title)

  if block_given?
    if title_text.blank?
      raise ArgumentError, "Must provide title option when using block"
    end
    content_tag(:h1, options, &block)
  else
    content_tag(:h1, text, **options)
  end
end

# File app/helpers/application_helper.rb, line 57
def icon_link_tag(name, **options)
  tag.link(href: asset_path(name), **options)
end

# File app/helpers/application_helper.rb, line 61
def manifest_digest
  Digest::SHA256.hexdigest(app_version.to_s)[0, 8]
end

# File app/helpers/application_helper.rb, line 65
def manifest_link_tag(name, **options)
  options[:crossorigin] ||= "use-credentials" unless Rails.env.production?
  tag.link(href: manifest_path(name, manifest_digest), **options)
end

# File app/helpers/application_helper.rb, line 70
def opengraph_image_tag(service_url, name)
  tag.meta(property: "og:image", content: "#{service_url}#{asset_path(name)}")
end

# File app/helpers/application_helper.rb, line 23
def page_title(service_name)
  title = content_for(:page_title)

  if title.blank?
    raise "No page title set. All pages must have a unique title and an " \
            "h1. Use the <%= h1 %> helper in your page, or set a title via " \
            "content_for(:page_title)."
  end

  if response.status == 422
    unless content_for?(:error_summary_rendered)
      raise "No error summary found. All pages that respond with a 422 " \
              "have an Error: prefixed title and must render an error " \
              "summary via f.mavis_error_summary."
    end

    title = "Error: #{title}"
  end

  safe_join([title, service_name], " – ")
end