Doc2pdf

Given a .doc file containing some placeholders in the form of the pattern {placeholder_here} and a replacement strategy (a mapping between placeholder texts and the content to be inserted), it applies the replacements and converts the document into a .pdf.

Installation

Add this line to your application's Gemfile:

gem 'doc2pdf'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install doc2pdf

Usage

First of all you have to implement a replacer, that is an object that responds to the call method and accepts a key argument. Its purpose is to provide the replacement for every keyword passed.

This is just a very simple implementation of such replacer:

class BasicReplacer
  def call(key:)
    case key
    when 'foo' then 'Fooing'
    when 'bar' then 'Baring'
    else
      raise 'keyword unknown'
    end
  end
end

replacer = BasicReplacer.new
replacer.call(key: 'foo') # => 'Fooing'
replacer.call(key: 'spam') # => RuntimeError (keyword unknown)

But you can also provide a more exotic implementation:

class DynamicReplacer
  def initialize(resource)
    @resource = resource
  end

  def call(key:)
    send(key)
  end

  private

  def method_missing(m, *args, &block)
    m.to_s.split('.').inject(@resource) do |memo, method_name|
      memo.send(method_name)
    end
  end
end

replacer = DynamicReplacer.new('Foo')
replacer.call(key: 'length.class.to_s.length') # => 7
replacer.call(key: 'asd') # => NoMethodError (undefined method `asd' for "Foo":String)

Pick you poison. 😄

With the replacer in place, you can then replace all the placeholders in your document and produce the output files:

require 'doc2pdf'

replacer = # ...

# You can specify a local file or a remote one:
file_or_url = 'input.docx'
file_or_url = 'https://domain.com/docs/input.docx'

Doc2pdf.replace_and_save!(
  file: file_or_url,
  replacer: replacer,
  output_path: './path/to/document.pdf'
)

Tempfiles

Suppose you need to use a tempfile also for the output:

file_or_url = 'https://domain.com/docs/input.docx'
outfile = Tempfile.new

Doc2pdf.replace_and_save!(
  file: file_or_url,
  replacer: replacer,
  output_path: outfile.path
)

Here you can use outfile for anything you want.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/xKraty/doc2pdf. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Doc2pdf project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.