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annotate src/json_ld_quads.ts @ 10:1c3a39057b11

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jasmine.json
author drewp@bigasterisk.com
date Fri, 06 Dec 2019 09:21:49 -0800
parents 6fefd287aff9
children b9f451791f3a
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1 import * as jsonld from "jsonld";
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2 import { DataFactory, Quad } from 'n3';
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3 const { namedNode, literal, quad } = DataFactory;
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4 import ns from 'n3/src/IRIs';
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5 const {rdf} = ns;
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7 export function eachJsonLdQuad(jsonLdObj: object, onQuad: (q: Quad) => void, done: () => void) {
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8 jsonld.expand(jsonLdObj, function onExpand(err, expanded) {
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9 if (err) {
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10 throw new Error();
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11 }
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12 (expanded as [object]).forEach(function (g) {
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13 var graph = g['@id'];
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14 var graphNode = namedNode(graph);
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15 g['@graph'].forEach(function (subj) {
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16 const subjNode = namedNode(subj['@id']);
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17 for (let pred in subj) {
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18 if (pred === '@id') {
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19 continue;
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20 }
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21 let predNode;
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22 if (pred === "@type") {
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23 predNode = namedNode(rdf.type);
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24 } else {
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25 predNode = namedNode(pred['@id']);
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26 }
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27 subj[pred].forEach(function (obj) {
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28 const objNode = (obj['@id'] ? namedNode(obj['@id']) :
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29 literal(obj['@value'], obj['@language'] || obj['@type']));
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30 onQuad(quad(subjNode, predNode, objNode, graphNode));
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31 });
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32 }
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33 });
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34 });
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35 done();
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36 });
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37 }
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38 ;