Class: Hyraft::Compiler::PageProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/hyraft/compiler/page_processor.rb

Constant Summary collapse

ROOT = 
Dir.pwd.freeze

Class Method Summary collapse

Class Method Details

.find_asset_file(path) ⇒ Object 



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# File 'lib/hyraft/compiler/page_processor.rb', line 163

def self.find_asset_file(path)

  clean_path =
    path.sub(/^\//, '')


  patterns = [

    File.join(ROOT, clean_path),

    File.join(
      ROOT,
      'public',
      clean_path
    ),

    File.join(
      ROOT,
      'public',
      'js',
      clean_path
    ),

    File.join(
      ROOT,
      'public',
      'styles',
      clean_path
    ),

    File.join(
      ROOT,
      'public',
      'css',
      clean_path
    ),

    File.join(
      ROOT,
      'app',
      'assets',
      'stylesheets',
      clean_path
    ),

    File.join(
      ROOT,
      'app',
      'assets',
      'javascripts',
      clean_path
    )
  ]


  patterns.find do |p|
    File.exist?(p)
  end

end

.process(template_file, page_path = nil, locals = {}) ⇒ Object 



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# File 'lib/hyraft/compiler/page_processor.rb', line 11

def self.process(template_file, page_path = nil, locals = {})
  content = File.read(template_file)

  # Extract metadata
  metadata_html = ""

  if content =~ /<metadata>(.*?)<\/metadata>/m
    metadata_html = $1.strip
    content = content.gsub(/<metadata>.*?<\/metadata>/m, '')
  end

  # Process components
  content = JoinProcessor.process_component_joins(
    content,
    template_file
  )

  # Extract imports
  css_imports, js_imports =
    ImportProcessor.extract_asset_imports(content)

  content =
    ImportProcessor.remove_asset_imports(content)

  variables = {}

  # Process hyr variables
  if content =~ /<hyr>(.*?)<\/hyr>/m
    ruby_code = $1

    begin
      ctx = Object.new
      ctx.instance_eval(ruby_code)

      ctx.instance_variables.each do |ivar|
        name = ivar.to_s.delete("@")
        variables[name] =
          ctx.instance_variable_get(ivar)
      end

    rescue => e
      warn "Ruby error: #{e.message}"
    end

    content =
      content.gsub(/<hyr>.*?<\/hyr>/m, '')
  end

  variables.merge!(locals)

  # Replace variables
  variables.each do |name, value|
    content =
      content.gsub(/:\[#{name}\]/, value.to_s)

    metadata_html =
      metadata_html.gsub(/:\[#{name}\]/, value.to_s)
  end


  # CSS processing
  css_tags =
    css_imports.map do |css|

      css_path = find_asset_file(css)

      if css_path
        "<style>#{File.read(css_path)}</style>"
      else
        "<link rel='stylesheet' href='/#{css}'>"
      end

    end.join("\n")


  # JavaScript collection
  javascript_code = ""

  js_imports.each do |js|

    js_path = find_asset_file(js)

    if js_path
      javascript_code << File.read(js_path)
      javascript_code << "\n"
    else
      javascript_code << "// missing #{js}\n"
    end

  end


  # Elevhyra processing
  if content =~ /<elevhyra>(.*?)<\/elevhyra>/m

    js_code = $1

    content =
      content.gsub(/<elevhyra>.*?<\/elevhyra>/m, '')

    variables.each do |name, value|
      js_code =
        js_code.gsub(/:\[#{name}\]/, value.to_s)
    end


    elevhyra_js =
      JavaScriptLibrary.get('elevhyra')


    if elevhyra_js
      javascript_code << elevhyra_js
      javascript_code << "\n"
    end


    javascript_code << "\n// User Code\n"
    javascript_code << js_code
  end


  # Encode ALL javascript
  js_tags = ""

  unless javascript_code.empty?

    encoded =
      Base64.strict_encode64(
        javascript_code
      )

    js_tags = <<~HTML
      <script>
      eval(atob("#{encoded}"));
      </script>
    HTML

  end


  {
    metadata: metadata_html,
    body: content,
    styles: css_tags,
    javascript: js_tags
  }
end