Class: Brief::Document::Section::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/brief/document/section/builder.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, options = {}) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/brief/document/section/builder.rb', line 11

def initialize(source, options = {})
  @source = source.map do |item|
    level, group = item
    [level, group.map { |f| f.is_a?(String) ? Nokogiri::HTML.fragment(f) : f }]
  end

  @low = options.fetch(:low, 1)
  @high = options.fetch(:high, 6)
  @nodes = []
  @cycles = 0

  begin
    run
  rescue
    raise BuilderError, $!
  end
end

Instance Attribute Details

#high ⇒ Object

Returns the value of attribute high.



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# File 'lib/brief/document/section/builder.rb', line 9

def high
  @high
end

#low ⇒ Object

Returns the value of attribute low.



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# File 'lib/brief/document/section/builder.rb', line 9

def low
  @low
end

#nodes ⇒ Object

Returns the value of attribute nodes.



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# File 'lib/brief/document/section/builder.rb', line 9

def nodes
  @nodes
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/brief/document/section/builder.rb', line 9

def source
  @source
end

Class Method Details

.run(source, options = {}) ⇒ Object 



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# File 'lib/brief/document/section/builder.rb', line 5

def self.run(source, options = {})
  new(source, options).to_fragment
end

Instance Method Details

#even? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/brief/document/section/builder.rb', line 93

def even?
  source.map(&:first).uniq.length == 1
end

#maxed_out? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/brief/document/section/builder.rb', line 89

def maxed_out?
  @cycles > source.length
end

#run ⇒ Object 



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# File 'lib/brief/document/section/builder.rb', line 29

def run
  source.length.times do
    source.each_with_index do |item, index|
      n = index + 1
      level, fragments = item
      next_level, next_fragments = source[n]

      if next_level && (next_level == level) && (level > low)
        new_fragment = (fragments + next_fragments).map(&:to_html).join('')
        source[index] = [level, [Nokogiri::HTML.fragment(new_fragment)]]
        source[n] = nil
      end
    end

    source.compact!
  end

  until even? || maxed_out?
    source.map! do |item|
      level, fragments = item

      [level, (fragments && fragments.first)]
    end

    if source.any? {|i| i[1].nil? }
      raise BuilderError, 'Fragments by level seems invalid'
    end

    source.each_with_index do |item, index|
      level, fragment = item
      n = index + 1
      next_level, next_fragment = source[n]

      if fragment && next_level && (next_level > level)
        parent = fragment.css('section, article').first
        parent.add_child(next_fragment)
        source[index] = [level, fragment]
        source[n] = nil
      end
    end

    source.compact!

    @cycles += 1
  end

  self.nodes = source.map(&:last).flatten

  nodes.each do |node|
    parent = node.css('section, article').first
    parents_first_el = parent && parent.children.first

    if parents_first_el && %w(h1 h2 h3 h4 h5 h6).include?(parent.children.first.name)
      parent['data-heading'] = parents_first_el.text
    end
  end

  nodes.map!(&:to_html)
end

#to_fragment ⇒ Object 



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# File 'lib/brief/document/section/builder.rb', line 97

def to_fragment
  @html = nodes.join('') unless nodes.empty?
  Nokogiri::HTML.fragment(@html || '<div/>')
end