Class: EmailCook

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

Overview

A very simple formatter for imported emails

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(raw) ⇒ EmailCook

Returns a new instance of EmailCook.



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# File 'lib/email_cook.rb', line 10

def initialize(raw)
  @raw = raw
  @body, @attachment_html, @elided = @raw.scan(EmailCook.raw_regexp).first
end

Class Method Details

.raw_regexp ⇒ Object 



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# File 'lib/email_cook.rb', line 5

def self.raw_regexp
  @raw_regexp ||=
    %r{\A\[plaintext\]$\n(.*)\n^\[/plaintext\]$(?:\s^\[attachments\]$\n(.*)\n^\[/attachments\]$)?(?:\s^\[elided\]$\n(.*)\n^\[/elided\]$)?}m
end

Instance Method Details

#add_quote(result, buffer) ⇒ Object 



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# File 'lib/email_cook.rb', line 15

def add_quote(result, buffer)
  if buffer.present?
    return if buffer =~ /\A(<br>)+\z\z/
    result << "<blockquote>#{buffer}</blockquote>"
  end
end

#cook(opts = {}) ⇒ Object 



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# File 'lib/email_cook.rb', line 92

def cook(opts = {})
  # fallback to PrettyText if we failed to detect a body
  return PrettyText.cook(@raw, opts) if @body.nil?

  result = htmlify(@body)
  result << "\n<br>" << @attachment_html if @attachment_html.present?
  result << "\n<br><br>" << Email::Receiver.elided_html(htmlify(@elided)) if @elided.present?
  result
end

#htmlify(text) ⇒ Object 



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# File 'lib/email_cook.rb', line 42

def htmlify(text)
  result = +""
  quote_buffer = +""

  in_text = false
  in_quote = false

  text.each_line do |line|
    # replace indentation with non-breaking spaces
    line.sub!(/\A\s{2,}/) { |s| "\u00A0" * s.length }

    if line =~ /\A\s*>/
      in_quote = true
      line.sub!(/\A[\s>]*/, "")

      unescaped_line = line
      line = CGI.escapeHTML(line)
      link_string!(line, unescaped_line)

      quote_buffer << line << "<br>"
    elsif in_quote
      add_quote(result, quote_buffer)
      quote_buffer = ""
      in_quote = false
    else
      sz = line.size

      unescaped_line = line
      line = CGI.escapeHTML(line)
      link_string!(line, unescaped_line)

      if sz < 60
        result << "<br>" if in_text && line == "\n"
        result << line
        result << "<br>"

        in_text = false
      else
        result << line
        in_text = true
      end
    end
  end

  add_quote(result, quote_buffer) if in_quote && quote_buffer.present?

  result.gsub!(/(<br>\n*){3,10}/, "<br><br>")
  result
end

#link_string!(line, unescaped_line) ⇒ Object 



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# File 'lib/email_cook.rb', line 22

def link_string!(line, unescaped_line)
  unescaped_line = unescaped_line.strip
  line.gsub!(/\S+/) do |str|
    if str.match?(%r{\A(https?://)[\S]+\z}i)
      begin
        url = URI.parse(str).to_s
        if unescaped_line == url
          # this could be oneboxed
          str = %|<a href="#{url}" class="onebox" target="_blank">#{url}</a>|
        else
          str = %|<a href="#{url}">#{url}</a>|
        end
      rescue URI::Error
        # don't fail if uri does not parse
      end
    end
    str
  end
end