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 34

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 30

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 63

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

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

Get type for asset path. (module or nil for javascript)

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 73

def asset_type(path, options = {})
  asset_resolver.type(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 42

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

TODO: perhaps prepend this function and add integrity if set to true?



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# File 'lib/condenser/rails/helper.rb', line 78

def javascript_include_tag(*sources)
  options = sources.extract_options!.stringify_keys
  path_options = options.extract!("protocol", "extname", "host", "skip_pipeline").symbolize_keys
  preload_links = []
  use_preload_links_header = options["preload_links_header"].nil? ? preload_links_header : options.delete("preload_links_header")
  nopush = options["nopush"].nil? ? true : options.delete("nopush")
  crossorigin = options.delete("crossorigin")
  crossorigin = "anonymous" if crossorigin == true
  integrity = options["integrity"]

  sources_tags = sources.uniq.map { |source|
    href = path_to_javascript(source, path_options)
    integrity = if options["integrity"] == true
      asset_integrity(source.to_s.delete_suffix('.js')+'.js')
    elsif options["integrity"] != false
      options["integrity"]
    end
    type = if !options.has_key?('type')
      asset_type(source.to_s.delete_suffix('.js')+'.js') 
    else
      options["type"]
    end
    rel = options["type"] == "module" ? "modulepreload" : "preload"
    
    if use_preload_links_header && !options["defer"] && href.present? && !href.start_with?("data:")
      preload_link = "<#{href}>; rel=#{rel}; as=script"
      preload_link += "; crossorigin=#{crossorigin}" unless crossorigin.nil?
      preload_link += "; integrity=#{integrity}" unless integrity.nil?
      preload_link += "; nonce=#{content_security_policy_nonce}" if options["nonce"] == true
      preload_link += "; nopush" if nopush
      preload_links << preload_link
    end
    tag_options = {
      "src" => href,
      "crossorigin" => crossorigin
    }.merge!(options.except('integrity', 'type'))
    if tag_options["nonce"] == true
      tag_options["nonce"] = content_security_policy_nonce
    end
    tag_options['type'] = type if type
    tag_options['integrity'] = integrity if integrity
    
    content_tag("script", "", tag_options)
  }.join("\n").html_safe

  if use_preload_links_header
    send_preload_links_header(preload_links)
  end

  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 53

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

#stylesheet_link_tag(*sources) ⇒ Object

TODO: perhaps prepend this function and add integrity if set to true?



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# File 'lib/condenser/rails/helper.rb', line 131

def stylesheet_link_tag(*sources)
  options = sources.extract_options!.stringify_keys
  path_options = options.extract!("protocol", "extname", "host", "skip_pipeline").symbolize_keys
  use_preload_links_header = options["preload_links_header"].nil? ? preload_links_header : options.delete("preload_links_header")
  preload_links = []
  crossorigin = options.delete("crossorigin")
  crossorigin = "anonymous" if crossorigin == true
  nopush = options["nopush"].nil? ? true : options.delete("nopush")
  
  sources_tags = sources.uniq.map { |source|
    href = path_to_stylesheet(source, path_options)
    integrity = if options["integrity"] == true
      asset_integrity(source.to_s.delete_suffix('.css')+'.css')
    elsif options["integrity"] != false
      options["integrity"]
    end

    if use_preload_links_header && href.present? && !href.start_with?("data:")
      preload_link = "<#{href}>; rel=preload; as=style"
      preload_link += "; crossorigin=#{crossorigin}" unless crossorigin.nil?
      preload_link += "; integrity=#{integrity}" unless integrity.nil?
      preload_link += "; nopush" if nopush
      preload_links << preload_link
    end
    tag_options = {
      "rel" => "stylesheet",
      "crossorigin" => crossorigin,
      "href" => href
    }.merge!(options.except('integrity'))
    if tag_options["nonce"] == true
      tag_options["nonce"] = content_security_policy_nonce
    end
    tag_options['integrity'] = integrity if integrity

    if apply_stylesheet_media_default && tag_options["media"].blank?
      tag_options["media"] = "screen"
    end
    
    tag(:link, tag_options)
  }.join("\n").html_safe

  if use_preload_links_header
    send_preload_links_header(preload_links)
  end

  sources_tags
end