Wiki::Yggdrasil
Wiki::Yggdrasil takes a Wikipedia URI as an argument, and proceeds to spider out a dependency tree of referenced articles.
Usage
require 'wiki/yggdrasil'
@tree = Wiki::Yggdrasil::Yggdrasil.new(uri: 'http://en.wikipedia.org/wiki/Yggdrasil')
referenced_articles = @tree.children(depth: 1) ## A hash of of articles linked by the parentThe preceeding code produces a structure as follows:
{:name=>"Yggdrasil",
:children=>
[{:name=>"Old Norse", :index=>1, :level=>1, :children=>[]},
{:name=>"Trees in mythology", :index=>2, :level=>1, :children=>[]},
{:name=>"Norse cosmology", :index=>3, :level=>1, :children=>[]},
{:name=>"Norse cosmology", :index=>4, :level=>1, :children=>[]},
{:name=>"<i>Poetic Edda</i>", :index=>5, :level=>1, :children=>[]},
{:name=>"<i>Prose Edda</i>", :index=>6, :level=>1, :children=>[]},
{:name=>"Snorri Sturluson", :index=>7, :level=>1, :children=>[]},
{:name=>"<i>Fraxinus excelsior</i>", :index=>8, :level=>1, :children=>[]},
{:name=>"Æsir", :index=>9, :level=>1, :children=>[]},
{:name=>"Thing (assembly)", :index=>10, :level=>1, :children=>[]},
{:name=>"Urðarbrunnr", :index=>11, :level=>1, :children=>[]},
{:name=>"Hvergelmir", :index=>12, :level=>1, :children=>[]},
{:name=>"Mímisbrunnr", :index=>13, :level=>1, :children=>[]},
{:name=>"Níðhöggr", :index=>14, :level=>1, :children=>[]},
{:name=>"Veðrfölnir and eagle", :index=>15, :level=>1, :children=>[]},
{:name=>"Dáinn, Dvalinn, Duneyrr and Duraþrór",
:index=>16,
:level=>1,
:children=>[]},
{:name=>"Sacred trees and groves in Germanic paganism and mythology",
:index=>17,
:level=>1,
:children=>[]},
{:name=>"Ragnarök", :index=>18, :level=>1, :children=>[]}],
:index=>0,
:depth=>0}Note: Any Yggdrasil object created with a depth of three or higher will likely take a few minutes to scrape the necessary information. If you'd like to contribute to making this process faster, check out this issue.
Installation
Add this line to your application's Gemfile:
gem 'wiki-yggdrasil'And then execute:
$ bundle
Or install it yourself as:
$ gem install wiki-yggdrasil
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 tags, and push the .gem file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/alex0112/wiki-yggdrasil.
License
The gem is available as open source under the terms of the MIT License.