Class: MdMetadata::Extractor

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mode = :hugo) ⇒ Extractor

Returns a new instance of Extractor.



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

def initialize(mode = :hugo)
  # Define input data
  @input = ""
  @result = { :metadata => {} , :content => ""}
  @mode = mode
end

Instance Attribute Details

#mode ⇒ Object

Returns the value of attribute mode.



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# File 'lib/md_metadata_extractor.rb', line 4

def mode
  @mode
end

Instance Method Details

#content_regex ⇒ Object 



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# File 'lib/md_metadata_extractor.rb', line 14

def content_regex
    /#{Regexp.quote(delimiter)}.*#{Regexp.quote(delimiter)}(.*)\z/m
end

#delimiter ⇒ Object 



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# File 'lib/md_metadata_extractor.rb', line 17

def delimiter
  case @mode
  when :hugo
    "+++"
  when :jekyll
    "---"
  end
end

#extract(input) ⇒ Object

Loads an input string for processing, returns a hash of values based on said metadata



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# File 'lib/md_metadata_extractor.rb', line 38

def extract(input)
  raise "Malformed input file" unless metadata_regex.match?(input)
  @metadata = metadata_regex.match(input).to_s.delete(delimiter)
  @metadata.each_line do |line|
    meta = line.split(separator)
    unless meta[1].nil?
      meta[0].strip!
      meta[1].gsub!( '"', ' ').strip!
      @result[:metadata][meta[0]] = meta[1]
    end
  end
  @result[:content] = content_regex.match(input)[-1].to_s.strip!
  @result
end

#metadata_regex ⇒ Object 



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# File 'lib/md_metadata_extractor.rb', line 11

def metadata_regex
    /#{Regexp.quote(delimiter)}(.*)#{Regexp.quote(delimiter)}/m
end

#separator ⇒ Object 



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# File 'lib/md_metadata_extractor.rb', line 26

def separator
  case @mode
  when :hugo
    "="
  when :jekyll
    ":"
  end
end