Module: MetaTags::Controller

Extended by:
ActiveSupport::Concern
Includes:
PageDataHelper
Defined in:
lib/meta_tags/controller.rb

Defined Under Namespace

Modules: ClassMethods

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PageDataHelper

#process_meta_tag, #processors

Instance Attribute Details

#instance ⇒ Object (readonly)

Returns the value of attribute instance.



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# File 'lib/meta_tags/controller.rb', line 28

def instance
  @instance
end

Instance Method Details

#markup_from_provider(provider = :default) ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 81

def markup_from_provider(provider = :default)
  tags = case provider.to_sym
  when :open_graph
    {
      title: "property=\"og:title\"",
      description: "property=\"og:description\"",
      image: "property=\"og:image\"",
      type: "property=\"og:type\"",
      url: "property=\"og:url\"",
      site_name: "property=\"og:site_name\""
    }
  when :twitter
    {
      title: "name=\"twitter:title\"",
      description: "name=\"twitter:description\"",
      image: "name=\"twitter:image\"",
      url: "name=\"twitter:url\"",
      site: "name=\"twitter:site\"",
      card: "name=\"twitter:card\""
    }
  else
    {
      description: "name=\"description\"",
    }
  end

  tags.each_with_object("") do |(key, property_string), buffer|
    if (content = meta_tags_container.send(key)).presence
      buffer << "<meta #{ property_string } content=\"#{ content }\">\n"
    end
  end
end

#meta_tags(*providers) ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 51

def meta_tags(*providers)
  options = providers.pop if providers.last.is_a? Hash
  charset = options[:encoding] rescue 'utf-8'

  data = meta_tags_data

  # Required meta tags
  markup = <<-HTML
    <meta charset="#{ charset }">
    <title>#{ data.title }</title>
  HTML

  if data.keywords.presence
    markup << "<meta name=\"keywords\" content=\"#{ data.keywords }\">"
  end

  # Default meta tags
  markup << markup_from_provider(:default)

  # Meta tags by provider
  providers.each do |provider|
    str = markup_from_provider provider

    # Prevents same meta tags added twice
    markup << str if !markup.include?(str)
  end

  markup.html_safe
end

#meta_tags_container ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 30

def meta_tags_container
  @_meta_tags_container ||= ::ApplicationController.meta_tags.dup
end

#meta_tags_data ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 34

def meta_tags_data
  process_meta_tags
  meta_tags_container
end

#meta_tags_for(identifier) ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 39

def meta_tags_for(identifier)
  if identifier.kind_of?(ActiveRecord::Base)
    @instance = identifier
  elsif (list = MetaTags::List.where(identifier: identifier.to_s).first)
    %w(title description keywords).each do |key|
      if (value = list.send(:"meta_#{ key }").presence)
        meta_tags_container.send(:"#{ key }=", value)
      end
    end
  end
end

#process_meta_tags ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 114

def process_meta_tags
  Container::TAGS_LIST.each do |label|
    next if meta_tags_container.send(:"#{ label }_changed?")

    if (data = process_meta_tag(label))
      set_meta_tag(label, data)
    end
  end
end

#set_meta_tag(key, value, options = {}) ⇒ Object 



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# File 'lib/meta_tags/controller.rb', line 124

def set_meta_tag(key, value, options = {})
  if value.presence && !options[:force]
    meta_tags_container.send("#{ key }=", value)
  end
end