Class: MailBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/mail_builder.rb

Defined Under Namespace

Modules: SimpleRenderingHelper Classes: BindingHelper

Instance Method Summary collapse

Constructor Details

#initialize(identifier_or_path, with_images = true) ⇒ MailBuilder

Returns a new instance of MailBuilder.



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# File 'lib/mail_builder.rb', line 9

def initialize(identifier_or_path,with_images = true)
  if identifier_or_path.is_a?(Symbol)
    @path = "./app/emails/#{identifier_or_path.to_s}" 
  else
    @path = identifier_or_path
  end
  @basename = File.basename(@path)
  @with_images = with_images
end

Instance Method Details

#add_html_part(related, locals) ⇒ Object 



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# File 'lib/mail_builder.rb', line 93

def add_html_part related,locals
  
  doc = Nokogiri::HTML::fragment(read_file_or_template("#{@basename}.html", locals))
  
  add_inline_images(doc,related) if @with_images
  
  related.parts[0].parts[1].content_type ['text', 'html', { 'charset' => 'UTF-8' }]
  related.parts[0].parts[1].body = doc.to_s
  
end

#add_inline_images(doc, related) ⇒ Object 



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# File 'lib/mail_builder.rb', line 41

def add_inline_images doc,related
  
  parts = Hash.new
  
  # Add images for img elements
  doc.css('img').each do |img|
    unless parts[img['src']]
      related.add_file img['src']
      parts[img['src']] = related.parts[-1]
      related.parts[-1].encoded
    end
    img['src'] = "cid:#{parts[img['src']].content_id[1...-1]}"
  end

  # Add images for bgimage attributes
  doc.css('*[bgimage]').each do |element|
    unless parts[element['bgimage']]
      related.add_file element['bgimage']
      parts[element['bgimage']] = related.parts[-1]
      related.parts[-1].encoded
    end
    element['bgimage'] = "cid:#{parts[element['bgimage']].content_id[1...-1]}"
  end

  # Add images for background attribute
  doc.css('*[background]').each do |element|
    if(element['background'].match ".jpg|.png|.gif")
      unless parts[element['background']]
        related.add_file element['background']
        parts[element['background']] = related.parts[-1]
        related.parts[-1].encoded
      end
      element['background'] = "cid:#{parts[element['background']].content_id[1...-1]}"
    end
  end

  # Add style attributes with urls to an image
  doc.css('*[style]').each do |element|
  
    if(element['style'].match(/url\(["']?(.*?\.(png|gif|jpg|jpeg))["']?\)/i))
      file_name = element['style'].match(/url\(["']?(.*?\.(png|gif|jpg|jpeg))["']?\)/i)[1]
      unless parts[file_name]
        related.add_file file_name
        parts[file_name] = related.parts[-1]
        related.parts[-1].encoded
      end
    
      element['style'] = element['style'].gsub(file_name,"cid:#{parts[file_name].content_id[1...-1]}")
    end
  end
end

#build(locals) ⇒ Object 



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# File 'lib/mail_builder.rb', line 19

def build(locals)
  result = nil
  builder = self
  Dir.chdir @path do
    result = Mail.new do

      part :content_type => 'multipart/related' do |related|
        
        related.part :content_type => 'multipart/alternative' do |alternative|
          alternative.part :content_type => 'text/plain', :body => builder.read_file_or_template("#{@basename}.txt", locals)
          alternative.part :content_type => 'text/html', :body => nil
        end
        
        builder.add_html_part(related,locals)
        
      end
    end
    
    result
  end
end

#erb_binding(vars) ⇒ Object 



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# File 'lib/mail_builder.rb', line 146

def erb_binding(vars)
  object = BindingHelper.new
  object.set_locals(vars)
  object.binding_for
end

#read_file_or_template(filename, locals = {}) ⇒ Object 



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# File 'lib/mail_builder.rb', line 104

def read_file_or_template(filename, locals = {})
  if File.exists?(filename)
    File.read(filename)
  elsif File.exists?("#{filename}.erb")
    template = ERB.new(File.read("#{filename}.erb"))
    template.result(erb_binding(locals))
  end
end