Class: Nexmo::Markdown::MermaidFilter

Inherits:
Banzai::Filter
  • Object
show all
Defined in:
lib/nexmo_markdown_renderer/filters/mermaid_filter.rb

Constant Summary collapse

TYPES = 
{
  'mermaid' => '',
  'sequence_diagram' => 'sequenceDiagram',
}.freeze

Instance Method Summary collapse

Instance Method Details

#call(input) ⇒ Object 



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# File 'lib/nexmo_markdown_renderer/filters/mermaid_filter.rb', line 9

def call(input)
  TYPES.each do |markdown, mermaid|
    input = input.gsub(/```#{markdown}(.+?)```/m) do |_s|
      render_mermaid(mermaid, $1)
    end
  end
    
  input
end

#render_mermaid(type, content) ⇒ Object 



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# File 'lib/nexmo_markdown_renderer/filters/mermaid_filter.rb', line 19

def render_mermaid(type, content)
  diagram = <<~HEREDOC
    <div class="mermaid" style="color: transparent;">#{type} #{content.gsub('\\n', '<br />').strip}
    </div>
  HEREDOC
    
  "FREEZESTART#{Base64.urlsafe_encode64(diagram)}FREEZEEND"
end