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93
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1 // Load requested view and provide access to it
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2 import { Store, Parser } from "n3";
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3
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4 async function fetchAndParse(url: string): Promise<Store> {
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5 const store = new Store();
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6 const res = await fetch(url);
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7 const body = await res.text();
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8 const parser = new Parser({ format: "N3" });
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9 await new Promise((done, rej) => {
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10 parser.parse(body, (err, quad, prefixes) => {
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11 if (err) {
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12 throw err;
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13 }
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14 if (quad) {
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15 store.addQuad(quad);
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16 } else {
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17 done(null);
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18 }
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19 });
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20 });
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21 return store;
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22 }
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23
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24 export class View {
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25 graph: Store;
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26 ready: Promise<null>;
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27 constructor(public url: string | "") {
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28 this.graph = new Store();
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29 this.ready = new Promise((res, rej) => {
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30 if (url) {
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31 fetchAndParse(url).then((s2) => {
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32 this.graph = s2;
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33 res(null);
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34 });
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35 } else {
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36 res(null);
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37 }
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38 });
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39 }
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40 label() {
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41 return "nicelabel";
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42 }
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43 }
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