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mu-authentication-provider.js
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mu-authentication-provider.js
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import { sparqlEscapeUri } from 'mu';
import { querySudo } from '@lblod/mu-auth-sudo';
import { SESSIONS_GRAPH } from './sparql';
export default class MuAuthenticationProvider {
constructor(sessionUri) {
this.sessionUri = sessionUri;
}
/**
* This method will get called before every request to the msgraph server
* This should return a Promise that resolves to an accessToken (in case of success)
* or rejects with error (in case of failure)
*/
async getAccessToken(options) {
const queryResult = await querySudo(`
PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
PREFIX oauth: <http://data.rollvolet.be/vocabularies/oauth-2.0/>
SELECT ?accessToken
WHERE {
GRAPH <${SESSIONS_GRAPH}> {
?oauthSession oauth:authenticates ${sparqlEscapeUri(this.sessionUri)} ;
oauth:tokenValue ?accessToken .
}
}`);
if (queryResult.results.bindings.length) {
return queryResult.results.bindings[0]['accessToken'].value;
} else {
throw new Error('No access token available for session');
}
};
}