Module: Condenser::Rails::Helper

Includes:
ActionView::Helpers::AssetTagHelper, ActionView::Helpers::AssetUrlHelper
Defined in:
lib/condenser/rails/helper.rb

Constant Summary collapse

VIEW_ACCESSORS = 
[
  :assets, :assets_manifest, :assets_precompiled,
  :assets_precompiled_regexes, :assets_prefix, :resolve_assets_with
]

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(obj) ⇒ Object 



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# File 'lib/condenser/rails/helper.rb', line 32

def self.extended(obj)
  obj.class_eval do
    attr_accessor(*VIEW_ACCESSORS)
  end
end

.included(klass) ⇒ Object 



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# File 'lib/condenser/rails/helper.rb', line 28

def self.included(klass)
  klass.class_attribute(*VIEW_ACCESSORS)
end

Instance Method Details

#asset_integrity(path, options = {}) ⇒ Object

Get integrity for asset path.

path - String path options - Hash options

Returns String integrity attribute or nil if no asset was found.



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# File 'lib/condenser/rails/helper.rb', line 61

def asset_integrity(path, options = {})
  asset_resolver.integrity(path)
end

#compute_asset_path(path, options = {}) ⇒ Object

Writes over the built in ActionView::Helpers::AssetUrlHelper#compute_asset_path to use the asset pipeline.



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# File 'lib/condenser/rails/helper.rb', line 40

def compute_asset_path(path, options = {})
  if asset_path = resolve_asset_path(path)
    File.join(assets_prefix || "/", asset_path)
  else
    raise Condenser::Rails::AssetNotPrecompiledError.new(path)
    # raise AssetNotFound, "The asset #{ path.inspect } is not present in the asset pipeline.\n"
  end
end

#javascript_include_tag(*sources) ⇒ Object

Override javascript tag helper to provide debugging support.

Eventually will be deprecated and replaced by source maps.



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# File 'lib/condenser/rails/helper.rb', line 68

def javascript_include_tag(*sources)
  options = sources.extract_options!.stringify_keys
  path_options = options.extract!("protocol", "extname", "host", "skip_pipeline").symbolize_keys
  early_hints_links = []

  sources_tags = sources.uniq.map { |source|
    href = path_to_javascript(source, path_options)
    early_hints_links << "<#{href}>; rel=preload; as=script"
    tag_options = {
      "src" => href
    }.merge!(options)
    
    if tag_options["nonce"] == true
      tag_options["nonce"] = content_security_policy_nonce
    end
    
    if secure_subresource_integrity_context?
      if tag_options["integrity"] == true
        tag_options["integrity"] = asset_integrity(source.to_s.delete_suffix('.js')+'.js')
      elsif tag_options["integrity"] == false
        tag_options.delete('integrity')
      end
    else
      tag_options.delete('integrity')
    end
    
    content_tag("script", "", tag_options)
  }.join("\n").html_safe

  request.send_early_hints("Link" => early_hints_links.join("\n")) if respond_to?(:request) && request

  sources_tags
end

#resolve_asset_path(path) ⇒ Object

Resolve the asset path against the Condenser manifest or environment. Returns nil if it’s an asset we don’t know about.



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# File 'lib/condenser/rails/helper.rb', line 51

def resolve_asset_path(path) #:nodoc:
  asset_resolver.asset_path(path)
end

#stylesheet_link_tag(*sources) ⇒ Object

Override stylesheet tag helper to provide debugging support.

Eventually will be deprecated and replaced by source maps.



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# File 'lib/condenser/rails/helper.rb', line 105

def stylesheet_link_tag(*sources)
  options = sources.extract_options!.stringify_keys
  path_options = options.extract!("protocol", "host", "skip_pipeline").symbolize_keys
  early_hints_links = []

  sources_tags = sources.uniq.map { |source|
    href = path_to_stylesheet(source, path_options)
    early_hints_links << "<#{href}>; rel=preload; as=style"
    tag_options = {
      "rel" => "stylesheet",
      "media" => "screen",
      "href" => href
    }.merge!(options)
    
    if secure_subresource_integrity_context?
      if tag_options["integrity"] == true
        tag_options["integrity"] = asset_integrity(source.to_s.delete_suffix('.css')+'.css')
      elsif tag_options["integrity"] == false
        tag_options.delete('integrity')
      end
    else
      tag_options.delete('integrity')
    end

    tag(:link, tag_options)
  }.join("\n").html_safe

  request.send_early_hints("Link" => early_hints_links.join("\n")) if respond_to?(:request) && request

  sources_tags
end