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annotate service/mqtt_to_rdf/src/index.ts @ 797:a3e430b39177

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reformat
author drewp@bigasterisk.com
date Tue, 29 Dec 2020 20:55:24 -0800
parents 9ca69f2be87b
children e0e623c01a69
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1 // for the web page
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2 export { DomBind } from "@polymer/polymer/lib/elements/dom-bind.js";
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3 export { StreamedGraph } from "streamed-graph";
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4
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5 import { LitElement, property, html, customElement } from "lit-element";
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6
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7 import { Literal, N3Store } from "n3";
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8 import { NamedNode, DataFactory } from "n3";
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9 const { namedNode, literal } = DataFactory;
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10
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11 import { VersionedGraph } from "streamed-graph";
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12 // import style from "./style.styl";
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13 import { labelFromUri, graphLiteral, graphUriValue } from "./graph_access";
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14
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15 const room = "http://projects.bigasterisk.com/room/";
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16
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17 function asString(x: Literal | undefined): string {
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18 if (x && x.value) {
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19 return x.value;
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20 }
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21 return "(unknown)";
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22 }
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23
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24 @customElement("mqtt-to-rdf-page")
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25 export class MqttToRdfPage extends LitElement {
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26 // static get styles() {
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27 // return [style];
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28 // }
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29
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30 @property({ type: Object })
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31 graph!: VersionedGraph;
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32
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33 connectedCallback() {
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34 super.connectedCallback();
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35 const sg = this.ownerDocument!.querySelector("streamed-graph");
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36 sg?.addEventListener("graph-changed", ((ev: CustomEvent) => {
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37 this.graph = ev.detail!.value as VersionedGraph;
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38 }) as EventListener);
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39 }
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40
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41 static get observers() {
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42 return ["onGraphChanged(graph)"];
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43 }
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44
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45 render() {
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46
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47 return html`
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48 <pre>
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49 mqtt_to_rdf
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50
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51 connected to <mqtt server>
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52
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53 messages received <n from stats page>
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54
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55 subscribed topics:
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56 ari nightlight temp: 72.2 <graph>
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57 ...
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58
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59
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60 </pre>
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61 `;
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62 }
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63
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64 }