Class: Bridgetown::RubyTemplateView::Helpers

Inherits:
Object
  • Object
show all
Includes:
Filters, Filters::FromLiquid
Defined in:
lib/bridgetown-core/helpers.rb

Defined Under Namespace

Classes: Context

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Filters::FromLiquid

#newline_to_br, #strip_html, #strip_newlines

Methods included from Filters

#array_to_sentence_string, #cgi_escape, #inspect, #jsonify, #normalize_whitespace, #number_of_words, #obfuscate_link, #pop, #push, #reading_time, #sample, #shift, #slugify, #smartify, #sort, #titleize, #to_integer, #unshift, #uri_escape, #where, #where_exp, #xml_escape

Methods included from Filters::ConditionHelpers

#parse_binary_comparison, #parse_comparison, #parse_condition

Methods included from Filters::DateFilters

#date_to_long_string, #date_to_rfc822, #date_to_string, #date_to_xmlschema

Methods included from Filters::GroupingFilters

#group_by, #group_by_exp

Methods included from Filters::URLFilters

#absolute_url, #in_locale, #relative_url, #strip_extname, #strip_index

Constructor Details

#initialize(view, site) ⇒ Helpers

Returns a new instance of Helpers.

Parameters:



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# File 'lib/bridgetown-core/helpers.rb', line 21

def initialize(view, site)
  @view = view
  @site = site

  # duck typing for Liquid context
  @context = Context.new({ site: site })
end

Instance Attribute Details

#site ⇒ Bridgetown::Site (readonly)

Returns:



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# File 'lib/bridgetown-core/helpers.rb', line 15

def site
  @site
end

#view ⇒ Bridgetown::RubyTemplateView (readonly)

Returns:



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# File 'lib/bridgetown-core/helpers.rb', line 12

def view
  @view
end

Instance Method Details

#asset_path(asset_type) ⇒ Object Also known as: webpack_path 



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# File 'lib/bridgetown-core/helpers.rb', line 29

def asset_path(asset_type)
  Bridgetown::Utils.parse_frontend_manifest_file(site, asset_type.to_s)
end

#attributes_from_options(options) ⇒ String

Create a set of attributes from a hash.

Parameters:

  • options (Hash) —

    key-value pairs of HTML attributes

Returns:

  • (String) 


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# File 'lib/bridgetown-core/helpers.rb', line 119

def attributes_from_options(options)
  segments = []
  options.each do |attr, option|
    attr = dashed(attr)
    if option.is_a?(Hash)
      option = option.transform_keys { |key| "#{attr}-#{dashed(key)}" }
      segments << attributes_from_options(option)
    else
      segments << attribute_segment(attr, option)
    end
  end
  safe(segments.join(" "))
end

#class_map(pairs = {}) ⇒ String

Returns Space-separated keys where the values are truthy.

Parameters:

  • pairs (Hash) (defaults to: {}) —

    A hash of key/value pairs.

Returns:

  • (String) —

    Space-separated keys where the values are truthy.



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# File 'lib/bridgetown-core/helpers.rb', line 41

def class_map(pairs = {})
  pairs.select { |_key, truthy| truthy }.keys.join(" ")
end

#dsd(input = nil, &block) ⇒ Object 



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# File 'lib/bridgetown-core/helpers.rb', line 263

def dsd(input = nil, &block)
  tmpl_content = block.nil? ? input.to_s : view.capture(&block)

  Bridgetown::Utils.dsd_tag(tmpl_content)
end

#dsd_style ⇒ Object 



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# File 'lib/bridgetown-core/helpers.rb', line 269

def dsd_style
  tmpl_path = caller_locations(1, 2).find do |loc|
                loc.label.include?("method_missing").!
              end&.path

  return unless tmpl_path # virtually guaranteed not to happen

  tmpl_basename = File.basename(tmpl_path, ".*")
  style_path = File.join(File.dirname(tmpl_path), "#{tmpl_basename}.dsd.css")

  unless File.file?(style_path)
    raise Bridgetown::Errors::FatalException, "Missing stylesheet at #{style_path}"
  end

  style_tag = site.tmp_cache["dsd_style:#{style_path}"] ||=
    "<style>#{File.read(style_path)}</style>"

  style_tag.html_safe
end

#find_relative_url_for_path(relative_path) ⇒ Object

Parameters:

  • relative_path (String) —

    source file path, e.g. "_posts/2020-10-20-my-post.md"

Raises:

  • (ArgumentError) —

    if the file cannot be found



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# File 'lib/bridgetown-core/helpers.rb', line 79

def find_relative_url_for_path(relative_path)
  site.each_site_file do |item|
    if item.relative_path.to_s == relative_path ||
        item.relative_path.to_s == "/#{relative_path}"
      return safe(item.respond_to?(:relative_url) ? item.relative_url : relative_url(item))
    end
  end

  raise ArgumentError, <<~MSG
    Could not find document '#{relative_path}' in 'url_for' helper.

    Make sure the document exists and the path is correct.
  MSG
end

#link_to(text, relative_path = nil, options = {}, &block) ⇒ String

This helper will generate the correct permalink URL for the file path.

Parameters:

  • text (String) —

    the content inside the anchor tag

  • relative_path (String, Object) (defaults to: nil) —

    source file path, e.g. "_posts/2020-10-20-my-post.md", or object that responds to url

  • options (Hash) (defaults to: {}) —

    key-value pairs of HTML attributes to add to the tag

Returns:

  • (String) —

    the anchor tag HTML

Raises:

  • (ArgumentError) —

    if the file cannot be found



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# File 'lib/bridgetown-core/helpers.rb', line 102

def link_to(text, relative_path = nil, options = {}, &block)
  if block.present?
    options = relative_path || {}
    relative_path = text
    text = view.respond_to?(:capture) ? view.capture(&block) : yield
  elsif relative_path.nil?
    raise ArgumentError, "You must provide a relative path"
  end
  segments = attributes_from_options({ href: url_for(relative_path) }.merge(options))

  safe("<a #{segments}>#{text}</a>")
end

#live_reload_dev_js ⇒ Object 



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# File 'lib/bridgetown-core/helpers.rb', line 34

def live_reload_dev_js
  Bridgetown::Utils.live_reload_js(site)
end

#localize ⇒ String Also known as: l

Delegates to I18n.localize with no additional functionality.

Returns:

  • (String) —

    the localized string

See Also:

  • I18n


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# File 'lib/bridgetown-core/helpers.rb', line 172

def localize(...)
  I18n.localize(...)
end

#markdownify(input = nil, &block) ⇒ String

Convert a Markdown string into HTML output.

Parameters:

  • input (String) (defaults to: nil) —

    the Markdown to convert, if no block is passed

Returns:

  • (String) 


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# File 'lib/bridgetown-core/helpers.rb', line 49

def markdownify(input = nil, &block)
  content = Bridgetown::Utils.reindent_for_markdown(
    block.nil? ? input.to_s : view.capture(&block)
  )
  converter = site.find_converter_instance(Bridgetown::Converters::Markdown)
  safe(converter.convert(content).strip)
end

#safe(input) ⇒ String Also known as: raw

For template contexts where ActiveSupport's output safety is loaded, we can ensure a string has been marked safe

Parameters:

  • input (Object)

Returns:

  • (String) 


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# File 'lib/bridgetown-core/helpers.rb', line 182

def safe(input)
  input.to_s.html_safe
end

#slot(name, input = nil, replace: false, transform: true, &block) ⇒ void

This method returns an undefined value.

Define a new content slot

Parameters:

  • name (String, Symbol) —

    name of the slot

  • input (String) (defaults to: nil) —

    content if not supplying a block

  • replace (Boolean) (defaults to: false) —

    set to true to replace any previously defined slot with same name

  • transform (Boolean) (defaults to: true) —

    set to false to avoid template-based transforms (Markdown, etc.)



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# File 'lib/bridgetown-core/helpers.rb', line 194

def slot(name, input = nil, replace: false, transform: true, &block)
  content = Bridgetown::Utils.reindent_for_markdown(
    block.nil? ? input.to_s : view.capture(&block)
  )

  resource = if view.respond_to?(:resource)
               # We're in a resource rendering context
               view.resource
             elsif view.respond_to?(:view_context)
               # We're in a component rendering context, although it's
               # likely the component's own `slot` method will be called
               # in this context
               view.view_context.resource
             end

  name = name.to_s
  resource.slots.reject! { _1.name == name } if replace
  resource.slots << Slot.new(
    name: name,
    content: content,
    context: resource,
    transform: transform
  )

  nil
end

#slotted(name, default_input = nil, &default_block) ⇒ String

Render out a content slot

Parameters:

  • name (String, Symbol) —

    name of the slot

  • input (String) —

    default content if slot isn't defined and no block provided

Returns:

  • (String) 


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# File 'lib/bridgetown-core/helpers.rb', line 226

def slotted(name, default_input = nil, &default_block) # rubocop:todo Metrics
  resource = if view.respond_to?(:resource)
               view.resource
             elsif view.respond_to?(:view_context)
               view.view_context.resource
             end

  return unless resource

  name = name.to_s
  filtered_slots = resource.slots.select do |slot|
    slot.name == name
  end

  return filtered_slots.map(&:content).join.html_safe if filtered_slots.length.positive?

  default_block.nil? ? default_input.to_s : view.capture(&default_block)
end

#slotted?(name) ⇒ Boolean

Check if a content slot has been defined

Returns:

  • (Boolean) 


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# File 'lib/bridgetown-core/helpers.rb', line 248

def slotted?(name)
  resource = if view.respond_to?(:resource)
               view.resource
             elsif view.respond_to?(:view_context)
               view.view_context.resource
             end

  return false unless resource

  name = name.to_s
  resource.slots.any? do |slot|
    slot.name == name
  end
end

#translate(key, **options) ⇒ String Also known as: t

Delegates to I18n#translate but also performs two additional functions.

First, if the key starts with a period translate will scope the key by the current view. Calling translate(".foo") from the people/index.html.erb template is equivalent to calling translate("people.index.foo"). This makes it less repetitive to translate many keys within the same view and provides a convention to scope keys consistently.

Second, the translation will be marked as html_safe if the key has the suffix "_html" or the last element of the key is "html". Calling translate("footer_html") or translate("footer.html") will return an HTML safe string that won't be escaped by other HTML helper methods. This naming convention helps to identify translations that include HTML tags so that you know what kind of output to expect when you call translate in a template and translators know which keys they can provide HTML values for.

Returns:

  • (String) —

    the translated string

See Also:

  • I18n


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# File 'lib/bridgetown-core/helpers.rb', line 154

def translate(key, **options) # rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
  return key.map { |k| translate(k, **options) } if key.is_a?(Array)

  key = key&.to_s

  if key&.start_with?(".")
    view_path = view&.page&.relative_path&.to_s&.split(".")&.first
    key = "#{view_path.tr("/", ".")}#{key}" if view_path.present?
  end

  ActiveSupport::HtmlSafeTranslation.translate(key, **options)
end

#url_for(relative_path) ⇒ String Also known as: link

This helper will generate the correct permalink URL for the file path.

Parameters:

  • relative_path (String, Object) —

    source file path, e.g. "_posts/2020-10-20-my-post.md", or object that responds to either url or relative_url

Returns:

  • (String) —

    the permalink URL for the file



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# File 'lib/bridgetown-core/helpers.rb', line 63

def url_for(relative_path)
  if relative_path.respond_to?(:relative_url)
    return safe(relative_path.relative_url) # new resource engine
  elsif relative_path.respond_to?(:url)
    return safe(relative_url(relative_path.url)) # old legacy engine
  elsif relative_path.to_s.start_with?("/", "http", "#", "mailto:", "tel:")
    return safe(relative_path)
  end

  find_relative_url_for_path(relative_path)
end