Rust implementation of NextGraph, a Decentralized and local-first web 3.0 ecosystem https://nextgraph.org
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nextgraph-rs/ng-sdk-js/app-node/index.js

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// Copyright (c) 2022-2024 Niko Bonnieure, Par le Peuple, NextGraph.org developers
// All rights reserved.
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE2 or http://www.apache.org/licenses/LICENSE-2.0>
// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
const WebSocket = require("ws");
// shim to insert WebSocket in global
const ng = require("nextgraph");
global.WebSocket = WebSocket;
let config = {
server_peer_id: "FtdzuDYGewfXWdoPuXIPb0wnd0SAg1WoA2B14S7jW3MA",
admin_user_key: "pye0YFzk1ix1amKEwd6AeqaUAN_PNpH5zGLomh0M1PAA",
client_peer_key: "GRP0QnlzaB8o2vdiBaNoOYDNOFX-uehLZMxeCaG3JA0A"
};
ng.init_headless(config).then( async() => {
let session_id;
try {
//let user_id = await ng.admin_create_user(config);
//console.log("user created: ",user_id);
let user_id = "tJVG293o6xirl3Ys5rzxMgdnPE_1d3IPAdrlR5qGRAIA";
let session = await ng.session_headless_start(user_id);
session_id = session.session_id;
console.log(session);
let dump = await ng.rdf_dump(session.session_id);
console.log(dump);
let sparql_result = await ng.sparql_query(session.session_id, "SELECT ?s ?p ?o WHERE { ?s ?p ?o }");
console.log(sparql_result);
for (const q of sparql_result.results.bindings) {
console.log(q);
}
let history = await ng.branch_history(session.session_id);
for (const h of history.history) {
console.log(h[0], h[1]);
}
console.log(history.swimlane_state);
// await ng.sparql_update(session.session_id, "DELETE DATA { <did:ng:t:AJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE> <did:ng:i> <did:ng:j> }");
// await ng.sparql_update(session.session_id, "INSERT DATA { <did:ng:t:AJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE> <did:ng:i> <did:ng:j> }");
// await ng.sparql_update(session.session_id, "INSERT { ?s <did:ng:i> <did:ng:k> } WHERE { ?s <did:ng:i> <did:ng:j> } ");
// await ng.sparql_update(session.session_id, "INSERT DATA { <did:ng:z> <did:ng:j> <did:ng:t:BJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE>. <did:ng:t:BJQ5gCLoXXjalC9diTDCvxxWu5ZQUcYWEE821nhVRMcE> <did:ng:m> <did:ng:n> }");
sparql_result = await ng.sparql_query(session.session_id, "SELECT ?a WHERE { ?a <did:ng:j> _:abc. _:abc <did:ng:m> <did:ng:n> }");
console.log(sparql_result);
for (const q of sparql_result.results.bindings) {
console.log(q);
}
sparql_result = await ng.sparql_query(session.session_id, "SELECT ?s ?a WHERE { ?s <did:ng:i> ?a }");
console.log(sparql_result);
for (const q of sparql_result.results.bindings) {
console.log(q);
}
let quads = await ng.sparql_query(session.session_id, "CONSTRUCT { ?s ?p ?o } WHERE { ?s ?p ?o }");
for (const q of quads) {
console.log(q.subject.toString(), q.predicate.toString(), q.object.toString(), q.graph.toString())
}
// let file_nuri = await ng.file_put_to_private_store(session.session_id,"LICENSE-MIT","text/plain");
// console.log(file_nuri);
// //let file_nuri = "did:ng:j:AD_d4njVMAtIDEU1G-RDxfOLIOZyOrB_1Rb7B6XykIEJ:k:APV-_Xtk03PW_Mbl4OaYpLrmEkBDVtn81lpto8sxc_tb";
// var bufs = [];
// let cancel = await ng.file_get_from_private_store(session.session_id, file_nuri, async (file) => {
// if (file.V0.FileMeta) {
// //skip
// } else if (file.V0.FileBinary) {
// if (file.V0.FileBinary.byteLength > 0) {
// bufs.push(file.V0.FileBinary);
// }
// } else if (file.V0 == 'EndOfStream') {
// //console.log("end of file");
// var buf = Buffer.concat(bufs);
// // if the file contains some UTF8 text
// console.log(buf.toString('utf8'));
// }
// });
// the 2nd argument `false` means: do not `force_close` the dataset.
// it will be detached, which means it stays in memory even when the session is stopped.
// (not all the dataset is in memory anyway! just some metadata)
// if you set this to true, the dataset is closed and removed from memory on the server.
// next time you will open a session for this user, the dataset will be loaded again.
let res = await ng.session_headless_stop(session.session_id, false);
//console.log(res);
} catch (e) {
console.error(e);
if (session_id) await ng.session_headless_stop(session_id, true);
}
})
.catch(err => {
console.error(err);
});