Class: Coradoc::Converter

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

Defined Under Namespace

Modules: CommonInputOutputMethods Classes: ConverterArgumentError, NoInputPathError, NoOutputPathError, NoProcessorError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input = nil, output = nil, **config) ⇒ Converter

Returns a new instance of Converter.



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# File 'lib/coradoc/converter.rb', line 7

def initialize(input = nil, output = nil, **config)
  @input = input || $stdin
  @output = output || $stdout

  @config = {
    input_options: {},
    output_options: {},
  }.merge(config)

  yield if block_given?
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/coradoc/converter.rb', line 5

def config
  @config
end

#input ⇒ Object

Returns the value of attribute input.



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# File 'lib/coradoc/converter.rb', line 5

def input
  @input
end

#output ⇒ Object

Returns the value of attribute output.



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# File 'lib/coradoc/converter.rb', line 5

def output
  @output
end

Class Method Details

.call(*args, **kwargs, &block) ⇒ Object 



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# File 'lib/coradoc/converter.rb', line 19

def self.call(*args, **kwargs, &block)
  new(*args, **kwargs, &block).convert
end

Instance Method Details

#convert(data = nil) ⇒ Object 



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# File 'lib/coradoc/converter.rb', line 39

def convert(data = nil)
  input_id = input_processor.processor_id
  output_id = output_processor.processor_id

  unless data
    input = self.input
    input = File.open(input, "rb") if input.is_a? String
    data = input.read
    input_path = input.path if input.respond_to? :path
  end

  # Some input processors may prefer filenames
  if input_processor.respond_to? :processor_wants_filenames
    unless input.respond_to? :path
      raise NoInputPathError,
            "no input path given, but #{input_processor} wants that " +
              "form. Ensure you don't read from standard input."
    end

    data = input.path
  end

  # We may need to configure destination path.
  output = self.output
  if output.is_a? String
    FileUtils.mkdir_p(File.dirname(output))
    output = File.open(output, "wb")
  end
  output_path = output.path if output.respond_to?(:path)

  input_options = config[:input_options]
  input_options = input_options.merge(destination: output_path) if output_path
  input_options = input_options.merge(sourcedir: File.dirname(input_path)) if input_path

  data = input_processor.processor_execute(data, input_options)

  # Two options are possible at this point:
  # Either we have a document we want to write to some output, or
  # we have a Hash, that contains a list of files and their
  # documents (where a nil key denotes the main file). Let's normalize
  # those cases.
  data = { nil => data } unless data.is_a? Hash

  # Let's check an edge case of non-nil keys and no output path
  if !output_path && data.keys.any? { |i| !i.nil? }
    raise NoOutputPathError,
          "no output path given, while wanting to write multiple files"
  end

  data = output_processor.processor_execute(data, config[:output_options])

  if input_processor.respond_to?(:processor_postprocess)
    data = input_processor.processor_postprocess(
      data, input_options.merge(output_processor: output_id)
    )
  end

  # Now we have all, let's write.
  data.each do |filename, content|
    if filename.nil?
      file = output
    else
      dirname = File.dirname(output_path)
      file = "#{dirname}/#{filename}"
      FileUtils.mkdir_p(File.dirname(file))
      file = File.open(file, "wb")
    end

    file.write(content)
    file.close
  end
end

#input_processor ⇒ Object 



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# File 'lib/coradoc/converter.rb', line 23

def input_processor
  if config[:input_processor]
    Input[config[:input_processor]]
  else
    Input.select_processor(input)
  end
end

#output_processor ⇒ Object 



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# File 'lib/coradoc/converter.rb', line 31

def output_processor
  if config[:output_processor]
    Output[config[:output_processor]]
  else
    Output.select_processor(output)
  end
end