Initial commit

Author: jure

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp
+*.sublime-project
+*.sublime-workspace
+

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in paper_metadata.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2013 Jure Triglav
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# PaperMetadata
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'paper_metadata'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install paper_metadata
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.libs << 'test'
+end
+
+desc "Run tests"
+task :default => :test

lib/paper_metadata.rb

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+require 'paper_metadata/version'
+require 'nokogiri'
+require 'net/http'
+require 'open-uri'
+require 'pry'
+
+module PaperMetadata
+  class << self
+    attr_accessor :doi_username
+
+    def doi_username
+      raise "PaperMetadata needs the DOI username to work with CrossRef API" unless @doi_username
+      @doi_username
+    end
+
+    def metadata_for(identifier)
+      if identifier =~ /^arxiv\:/i
+        metadata_for_arxiv(identifier)
+      elsif identifier =~ /^doi\:/i
+        metadata_for_doi(identifier)
+      end
+    end
+
+    def metadata_for_doi(doi)
+      doc = Nokogiri::XML(open("http://www.crossref.org/openurl/?id=doi:#{doi}&noredirect=true&pid=#{PaperMetadata.doi_username}&format=unixref"))
+      paper = Hash.new
+
+      if doc.xpath("//titles/title").first
+        paper[:volume] = doc.xpath("//journal_issue/journal_volume/volume").inner_html.to_s
+        paper[:isssue] = doc.xpath("//journal_issue/issue").inner_html.to_s
+        paper[:first_page] = doc.xpath("//pages/first_page").inner_html.to_s
+        paper[:last_page] = doc.xpath("//pages/last_page").inner_html.to_s
+        paper[:title] = doc.xpath("//titles/title").inner_html.to_s
+        paper[:authors] = doc.xpath("//contributors/person_name").
+          map{ |author| author.content.strip}
+
+        paper[:authors] = paper[:authors].map do |author|
+          author.gsub(/\s+/, ' ')
+        end.join(', ')
+
+        paper[:journal] = doc.xpath("//abbrev_title").inner_html + " " +
+          doc.xpath("//journal_issue/publication_date/year").first.inner_html
+        paper[:resource] = doc.xpath("//journal_article/doi_data/resource").inner_html
+      else
+        paper[:status] = :NODOI
+      end
+      paper
+    end
+
+    def metadata_for_arxiv(identifier)
+      identifier.gsub!(/^arXiv\:/i, '')
+      url = URI.parse("http://export.arxiv.org/api/query?search_query=#{identifier}&start=0&max_results=1")
+      res = Net::HTTP.get_response(url)
+      doc = Nokogiri::XML(res.body)
+      doc.remove_namespaces!
+      paper = Hash.new
+      if entry = doc.xpath("//entry").first
+        paper[:title] = entry.xpath('title').text
+        paper[:author] = entry.xpath('author').text.strip
+        paper[:id] = entry.xpath('id').text
+        paper[:updated] = entry.xpath('updated').text
+        paper[:summary] = entry.xpath('summary').text
+        paper[:published] = entry.xpath('published').text
+      end
+      paper
+    end
+  end
+end

lib/paper_metadata/version.rb

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+module PaperMetadata
+  VERSION = "0.0.1"
+end

paper_metadata.gemspec

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+# -*- encoding: utf-8 -*-
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'paper_metadata/version'
+
+Gem::Specification.new do |gem|
+  gem.name          = "paper_metadata"
+  gem.version       = PaperMetadata::VERSION
+  gem.authors       = ["Jure Triglav"]
+  gem.email         = ["juretriglav@gmail.com"]
+  gem.summary   = %q{Paper_metadata gem gets the metadata for papers with a DOI or an arXiv identifier}
+  gem.description       = %q{Metadata getter for scientific papers}
+  gem.homepage      = "http://github.com/jure/paper_metadata"
+
+  gem.files         = `git ls-files`.split($/)
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.require_paths = ["lib"]
+
+  gem.add_development_dependency "pry"
+  gem.add_development_dependency "rake"
+  gem.add_development_dependency "webmock"
+  gem.add_runtime_dependency "nokogiri", ["= 1.5.6"]
+
+end