Class: Guardrails::Init::MediaQueryScaffolder

Inherits:
Object
  • Object
show all
Defined in:
lib/guardrails/init/media_query_scaffolder.rb

Constant Summary collapse

DARK_MODE_PATTERN = 
/@media\s*\(\s*prefers-color-scheme\s*:\s*dark\s*\)/
HIGH_CONTRAST_PATTERN = 
/@media\s*\(\s*prefers-contrast\s*:\s*more\s*\)/
DARK_MODE_STUB = 
<<~CSS
  @media (prefers-color-scheme: dark) {
    /* TODO: fill this in — define dark-mode token overrides here */
  }
CSS
HIGH_CONTRAST_STUB = 
<<~CSS
  @media (prefers-contrast: more) {
    /* TODO: fill this in — define high-contrast token overrides here */
  }
CSS

Instance Method Summary collapse

Constructor Details

#initialize(file, output: $stdout) ⇒ MediaQueryScaffolder

Returns a new instance of MediaQueryScaffolder.



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# File 'lib/guardrails/init/media_query_scaffolder.rb', line 23

def initialize(file, output: $stdout)
  @file = file ? Pathname(file) : nil
  @output = output
end

Instance Method Details

#scaffold ⇒ Object 



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# File 'lib/guardrails/init/media_query_scaffolder.rb', line 28

def scaffold
  return [:skipped, "no colors_file configured — add prefers-color-scheme / prefers-contrast blocks to your token file manually"] if @file.nil?
  return [:skipped, "configured colors_file does not exist (#{@file.basename}) — skipping media-query scaffold"] unless @file.exist?

  content = File.read(@file, encoding: Encoding::UTF_8)
  additions = []

  unless content.match?(DARK_MODE_PATTERN)
    content = ensure_trailing_newline(content) + "\n" + DARK_MODE_STUB
    additions << "prefers-color-scheme: dark"
  end

  unless content.match?(HIGH_CONTRAST_PATTERN)
    content = ensure_trailing_newline(content) + "\n" + HIGH_CONTRAST_STUB
    additions << "prefers-contrast: more"
  end

  if additions.empty?
    [:already_present, "media-query stubs already present in #{@file.basename}"]
  else
    File.write(@file, content, encoding: Encoding::UTF_8)
    [:appended, "appended stubs (#{additions.join(', ')}) to #{@file.basename}"]
  end
end