Class: Riseup::Parser

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

Constant Summary collapse

@@default_spec =

This is a super basic markup language, none of the characters here are unsafe for HTML

Spec.new([
  # Escapes
  ['\\*', '*'],
  ['\\=', '='],
  ['\\`', '`'],
  ['\\\\', '\\'],
  # Bold
  ['**', '<b>', '</b>'],
  # Italic
  ['*', '<i>', '</i>'],
  # Header
  ['=', '<h1>', '</h2>'],
  # Code
  ['`', '<code>', '</code>'],
  # Newline
  ["\n", '<br/>']
])

Instance Method Summary collapse

Constructor Details

#initialize(unformated, spec = @@default_spec) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/riseup/parser.rb', line 23

def initialize(unformated, spec = @@default_spec)
  unless unformated.is_a?(String)
    raise ArgumentError, 'Unformated text (first argument) must be a String'
  end

  unless spec.is_a?(Spec)
    raise ArgumentError, 'Markup specification (second argument) must be a Riseup::Spec'
  end
  @unformated = unformated
  @spec = spec
  tokens
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/riseup/parser.rb', line 40

def parse
  tokens if @tokens.nil?

  token_toggle = Set.new
  new_html = []
  @tokens.each do |t|
    if @spec.include?(t)
      if token_toggle.include?(t)
        token_toggle.delete(t)
        new_html.append(@spec[t].finish) unless @spec[t].substitute?
      else
        if !@spec[t].substitute?
          token_toggle.add(t)
          new_html.append(@spec[t].start)
        else
          new_html.append(@spec[t].substitute)
        end
      end
    else
      new_html.append(t)
    end
  end

  # Fix unterminated tokens
  token_toggle.reverse_each do |token|
    new_html.append(@spec[token].finish) unless @spec[token].substitute?
  end
  new_html.join
end

#to_s ⇒ Object 



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# File 'lib/riseup/parser.rb', line 70

def to_s
  @tokens.to_s
end

#tokens ⇒ Object 



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# File 'lib/riseup/parser.rb', line 36

def tokens
  @tokens = @unformated.split(@spec.regex).reject(&:empty?)
end