linked data recs server

require 'rubygems'
require 'sinatra'
require 'rqommend'

DEFAULT_OPTIONS = {
    'certificate' => 'cert.ca', 
    'key' => 'cert.pem'
}
DEFAULT_ENDPOINT = 'https://server11.incubator.bbc.co.uk/sparql/'

Rqommend::Can.new "
    SELECT *
    WHERE {
      @INPUT <http://www.w3.org/2002/07/owl#sameAs> ?dbpedia_artist .
      @INPUT <http://xmlns.com/foaf/0.1/name> ?input_name .
      ?dbpedia_artist <http://dbpedia.org/ontology/homeTown> <http://dbpedia.org/resource/Detroit> .
      ?dbpedia_artist_2 <http://dbpedia.org/ontology/homeTown> <http://dbpedia.org/resource/Detroit> .
      ?OUTPUT <http://www.w3.org/2002/07/owl#sameAs> ?dbpedia_artist_2 .
      ?OUTPUT <http://xmlns.com/foaf/0.1/name> ?output_name .
      FILTER (@INPUT != ?OUTPUT && regex(str(?OUTPUT), '^http://www\.bbc\.co\.uk'))
    }",
    '<%= result["input_name"] %> and <a href="<%= result["OUTPUT"] %>"><%= result["output_name"] %></a> are both based in Detroit'

Rqommend::Can.new "
    SELECT *
    WHERE {
      @INPUT <http://purl.org/vocab/relationship/siblingOf> ?OUTPUT .
      @INPUT <http://xmlns.com/foaf/0.1/name> ?input_name .
      ?OUTPUT <http://xmlns.com/foaf/0.1/name> ?output_name .
      FILTER (@INPUT != ?OUTPUT && regex(str(?OUTPUT), '^http://www\.bbc\.co\.uk'))
    }
    ",
    '<%= result["input_name"] %> is the sibling of <a href="<%= result["OUTPUT"] %>"><%= result["output_name"] %></a>'

Rqommend::Can.new "
    SELECT *
    WHERE {
      @INPUT <http://purl.org/ontology/mo/member> ?member .
      ?OUTPUT <http://purl.org/ontology/mo/member> ?member .
      @INPUT <http://xmlns.com/foaf/0.1/name> ?input_name .
      ?OUTPUT <http://xmlns.com/foaf/0.1/name> ?output_name .
      ?member <http://xmlns.com/foaf/0.1/name> ?member_name .
      FILTER (@INPUT != ?OUTPUT && regex(str(?OUTPUT), '^http://www\.bbc\.co\.uk'))
    }
    ",
    '<%= result["member_name"] %> played in <%= result["input_name"] %> and also in <a href="<%= result["OUTPUT"] %>"><%= result["output_name"] %></a>'

Rqommend::Can.new "
      SELECT * WHERE {
        @INPUT 
          <http://www.w3.org/2002/07/owl#sameAs> ?dbpedia_artist ;
          <http://xmlns.com/foaf/0.1/name> ?input_name .
        ?dbpedia_artist
          <http://dbpedia.org/ontology/label> ?label .
        ?dbpedia_artist_2
          <http://dbpedia.org/ontology/label> ?label .
        ?label
          <http://xmlns.com/foaf/0.1/name> ?label_name ;
          a <http://dbpedia.org/class/yago/IndependentRecordLabels> ;
          <http://dbpedia.org/property/abstract> ?abstract .
        ?OUTPUT 
          <http://www.w3.org/2002/07/owl#sameAs> ?dbpedia_artist_2 ;
          <http://xmlns.com/foaf/0.1/name> ?output_name .
        FILTER (
          (@INPUT != ?OUTPUT) &&
          regex(str(?OUTPUT), '^http://www\.bbc\.co\.uk') &&
          (langMatches(lang(?abstract), 'en') || lang(?abstract) = '' )
        )
      }
    ",
    '<%= result["input_name"] %> and <a href="<%= result["OUTPUT"] %>"><%= result["output_name"] %></a> were both signed on <a href="<%= result["label"] %>"><%= result["label_name"] %></a>. <%= result["abstract"] %>'

get '/recommendations/:artist' do
    artist_guid = params[:artist]
    resource = Rqommend::Resource.new "http://www.bbc.co.uk/music/artists/#{artist_guid}#artist"
    recommendation = resource.recommendation
    "<div id=\"recommendations\">#{recommendation['explanation']}</div>"
end