Mercurial > hg > ng2-query-ismi

annotate app/query.service.ts @ 3:c741a00d38de

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first list of object types :-)
author Robert Casties <casties@mpiwg-berlin.mpg.de>
date Wed, 13 Jan 2016 12:41:01 +0100
parents 80270f5a5735
children b06a5d61afed
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1 import {Injectable} from 'angular2/core';
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2 import {Http, Headers} from 'angular2/http';
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3
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4 import 'rxjs/Rx'; // import all RxJS operators
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5
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6 import {QueryMode} from './query-mode';
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7
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8 @Injectable()
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9 export class QueryService {
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10
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11 public ismiObjectTypes;
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12
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13 public QUERY_MODES: QueryMode[] = [
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14 {id: 'type_is', label:'Object type is'},
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15 {id: 'att_contains', label: 'Attribute contains'}];
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16
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17 constructor(private _http: Http) {}
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18
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19 getQueryModes(): QueryMode[] {
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20 return this.QUERY_MODES;
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21 }
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23 getQueryOptions(queryMode: QueryMode) {
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24 var options = ['a1', 'b1', 'c1'];
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25 if (queryMode.id === 'att_contains') {
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26 options = ['d', 'e', 'f'];
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27 } else if (queryMode.id === 'type_is') {
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28 options = this.ismiObjectTypes;
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29 }
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30 return Promise.resolve(options);
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31 }
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32
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33 setupIsmiObjectTypes() {
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34 var query = `MATCH (n) WITH DISTINCT labels(n) AS labels
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35 UNWIND labels AS label
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36 RETURN DISTINCT label ORDER BY label`;
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37
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38 var res = this.fetchCypherResult(query);
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39 res.subscribe(
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40 data => {
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41 console.debug("neo4j data=", data);
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42 this.ismiObjectTypes = data.data.map(elem => elem[0]).filter(elem => elem[0] != "_");
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43 console.debug("ismi types=", this.ismiObjectTypes);
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44 },
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45 err => console.error("neo4j error=", err),
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46 () => console.debug('neo4j query Complete')
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47 );
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48 }
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49
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50 fetchCypherResult(query: string, params = {}) {
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51 var headers = new Headers();
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52 headers.append('Authorization', 'Basic ' + btoa('neo4j' + ':' + 'neo5j'));
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53 headers.append('Content-Type', 'application/json');
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54 headers.append('Accept', 'application/json');
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55 // put headers in options
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56 var opts = {'headers': headers};
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57 // create POST data from query
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58 var data = JSON.stringify({'query': query, 'params': params});
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59 // make post request asynchronously
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60 var resp = this._http.post('http://localhost:7474/db/data/cypher/', data, opts)
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61 // filter result as JSON
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62 .map(res => res.json());
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63 // return Observable
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64 return resp;
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65 }
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66 }