Update jsonld to 1.0.2

This contains fixes for the following open
non-RDFJS-compliance issues in jsonld:
* digitalbazaar/jsonld.js#243
* digitalbazaar/jsonld.js#244

Author: ddvlanck

lib/ParserStream.js

@@ -1,7 +1,8 @@
 const concat = require('concat-stream')
 const jsonld = require('jsonld')
-const rdf = require('rdf-data-model')
 const Readable = require('readable-stream')
+const rdf = require('@rdfjs/data-model')
+const RdfTerms = require('rdf-terms')
 
 class ParserStream extends Readable {
   constructor (input, options) {
@@ -38,20 +39,21 @@ class ParserStream extends Readable {
     })
   }
 
-  term (options) {
-    if (options.type === 'IRI') {
-      return this.factory.namedNode(options.value)
+  /**
+   * Function rewrite with term.termType.
+   * This is done to fix issue #243, see https://github.com/digitalbazaar/jsonld.js/issues/243 .
+   * **/
+  term (term) {
+    switch (term.termType) {
+      case 'NamedNode':
+        return this.factory.namedNode(term.value)
+      case 'BlankNode':
+        return this.factory.blankNode(term.value.substr(2)) // Remove the '_:' prefix. see https://github.com/digitalbazaar/jsonld.js/issues/244
+      case 'Literal':
+        return this.factory.literal(term.value, term.language || term.datatype)
+      case 'DefaultGraph':
+        return this.factory.defaultGraph()
     }
-
-    if (options.type === 'blank node') {
-      if (!(options.value in this.blankNodes)) {
-        this.blankNodes[options.value] = this.factory.blankNode()
-      }
-
-      return this.blankNodes[options.value]
-    }
-
-    return this.factory.literal(options.value, options.language || options.datatype)
   }
 
   parse (data) {
@@ -72,17 +74,11 @@ class ParserStream extends Readable {
 
       return jsonld.promises().toRDF(json, toRdfOptions)
     }).then((rawGraph) => {
-      Object.keys(rawGraph).forEach((graphIri) => {
-        const graph = graphIri !== '@default' ? this.factory.namedNode(graphIri) : null
-
-        rawGraph[graphIri].forEach((triple) => {
-          this.push(this.factory.quad(
-            this.term(triple.subject),
-            this.term(triple.predicate),
-            this.term(triple.object),
-            graph))
-        })
-      })
+      for (let index in rawGraph) {
+        this.push(RdfTerms.mapTerms(rawGraph[index], (value) => this.term(value), this.factory))
+      }
+    }).catch((error) => {
+      this.emit('error', error)
     })
   }