First commit

README.md

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+![GSI Logo](http://gsi.dit.upm.es/templates/jgsi/images/logo.png)
+[Web 4.0](http://gsi.dit.upm.es)
+==================================
+
+Description
+---------------------
+This module is part of the Web4.0 project.
+
+So far, it performs basic queries to dbpedia, but the same code could be use to query any other sparql endpoint.
+
+Dependencies
+--------------------
+coffee-script
+sparql
+hook.io

bin/index.js

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+require('coffee-script')
+var Hook = require('../lib/hook.io-dbpedia').DBPediaHook
+var SparHook = new Hook()
+SparHook.start()

lib/hook.io-dbpedia.coffee

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+# Imports
+sparql = require 'sparql'
+Hook = require('hook.io').Hook
+
+examplequery = "
+        SELECT DISTINCT ?label ?abstract ?population
+        WHERE { ?place rdf:type dbpedia-owl:PopulatedPlace.
+                ?place foaf:name ?label.
+                ?place dbpprop:population ?population.
+                OPTIONAL{
+                    ?place dbpedia-owl:abstract ?abstract.
+                    FILTER langMatches( lang(?abstract), 'en')
+                }
+        } LIMIT 10"
+        
+
+class DBPediaHook extends Hook
+    constructor: (options) ->
+        self = this
+        Hook.call(self, options)
+        @client = new sparql.Client 'http://dbpedia.org/sparql'
+        #Set some initial namespaces
+        @client.prefix_map.dbprop = 'http://dbpedia.org/property/'
+        @client.prefix_map.dbpedia = 'http://dbpedia.org/resource/'
+        @client.prefix_map.rdf = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'
+        @client.prefix_map.dbpedia-owl = 'http://dbpedia.org/ontology/'
+
+        self.on 'hook::ready', ->
+            self.on '*::query', (data,fn) ->
+                @queryDBPedia data , (res) ->
+                    console.log res
+                    fn res
+        console.log "Created"
+
+
+    queryDBPedia: (query, cb) ->
+        console.log ">>Going to query"
+        @client.rows  query, (err, res) ->
+                cb res
+
+exports.DBPediaHook = DBPediaHook