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GeezerVison is showing github.com — node-solid-server/lib/rdf-notification-template.mjs at main · nodeSolidServer/node-solid-server

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rdf-notification-template.mjs

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import { v4 as uuid } from 'uuid'
const CONTEXT_ACTIVITYSTREAMS = 'https://www.w3.org/ns/activitystreams'
const CONTEXT_NOTIFICATION = 'https://www.w3.org/ns/solid/notification/v1'
const CONTEXT_XML_SCHEMA = 'http://www.w3.org/2001/XMLSchema'
function generateJSONNotification ({
activity: type,
eventID,
date: published,
object,
target,
state = undefined
}) {
return {
published,
type,
id: `urn:uuid:${uuid()}`,
...(eventID) && { state: eventID },
object,
...(type === 'Add') && { target },
...(type === 'Remove') && { origin: target }
}
}
function generateTurtleNotification ({
activity,
eventID,
date,
object,
target
}) {
let targetLine = ''
let stateLine = ''
if (activity === 'Add') {
targetLine = `\n as:target <${target}> ;`
}
if (activity === 'Remove') {
targetLine = `\n as:origin <${target}> ;`
}
if (eventID) {
stateLine = `\n notify:state "${eventID}" ;`
}
return `@prefix as: <${CONTEXT_ACTIVITYSTREAMS}#> .
@prefix notify: <${CONTEXT_NOTIFICATION}#> .
@prefix xsd: <${CONTEXT_XML_SCHEMA}#> .
<urn:uuid:${uuid.v4()}> a as:${activity} ;
as:object <${object}> ;${targetLine}${stateLine}
as:published "${date}"^^xsd:dateTime .`.replaceAll('\n', '\r\n')
}
function serializeToJSONLD (notification, isActivityStreams = false) {
notification['@context'] = [CONTEXT_NOTIFICATION]
if (!isActivityStreams) {
notification['@context'].unshift(CONTEXT_ACTIVITYSTREAMS)
}
return JSON.stringify(notification, null, 2)
}
export default function rdfTemplate (props) {
const { mediaType } = props
if (mediaType[0] === 'application/activity+json' || (mediaType[0] === 'application/ld+json' && mediaType[1].get('profile')?.toLowerCase() === 'https://www.w3.org/ns/activitystreams')) {
return serializeToJSONLD(generateJSONNotification(props), true)
}
if (mediaType[0] === 'application/ld+json') {
return serializeToJSONLD(generateJSONNotification(props))
}
if (mediaType[0] === 'text/turtle') {
return generateTurtleNotification(props)
}
}
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