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/example-webapp-react-social.../src/Query.tsx

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import React, { FunctionComponent, useState } from 'react';
import { LifebuoyIcon } from '@heroicons/react/24/outline'
import { useLdo, dataset, useNextGraphAuth, useResource, useSubject} from './reactMethods';
import { SocialQueryShapeType } from "./.ldo/socialquery.shapeTypes.ts";
import { namedNode } from "@rdfjs/data-model";
import type { Quad } from "@rdfjs/types";
import type { DatasetChanges } from "@ldo/rdf-utils";
import './App.css'
import "../../../common/src/styles.css";
const query_string = `PREFIX vcard: <http://www.w3.org/2006/vcard/ns#>
PREFIX xskills: <did:ng:x:skills#>
PREFIX ksp: <did:ng:k:skills:programming:>
PREFIX ng: <did:ng:x:ng#>
CONSTRUCT { [
vcard:hasEmail ?email;
vcard:fn ?name;
a vcard:Individual;
ng:site ?public_profile;
ng:protected ?protected_profile;
xskills:hasRating [
a xskills:Rating ;
xskills:rated ?level;
xskills:skill ?skill
]
]
}
WHERE {
?contact a vcard:Individual.
?contact vcard:fn ?name.
?contact vcard:hasEmail ?email.
OPTIONAL { ?contact ng:site ?public_profile . ?contact ng:site_inbox ?public_inbox }
OPTIONAL { ?contact ng:protected ?protected_profile . ?contact ng:protected_inbox ?prot_inbox }
?contact xskills:hasRating [
a xskills:Rating ;
xskills:rated ?level;
xskills:skill ?skill
].
?contact xskills:hasRating/xskills:skill ksp:rust.
?contact xskills:hasRating/xskills:skill ksp:svelte.
FILTER ( ?skill IN (
ksp:rust, ksp:svelte, ksp:rdf, ksp:tailwind, ksp:yjs, ksp:automerge
) )
}`;
const ranking_query = `SELECT ?mail (SAMPLE(?n) as?name) (MAX(?rust_) as ?rust) (MAX(?svelte_) as ?svelte) (MAX(?tailwind_) as ?tailwind)
(MAX(?rdf_) as ?rdf) (MAX(?yjs_) as ?yjs) (MAX(?automerge_) as ?automerge) (SUM(?total_) as ?total)
WHERE {
{ SELECT ?mail (SAMPLE(?name) as ?n) ?skill (AVG(?value)+1 AS ?score)
WHERE {
?rating <http://www.w3.org/2006/vcard/ns#hasEmail> ?mail.
?rating <http://www.w3.org/2006/vcard/ns#fn> ?name.
?rating <did:ng:x:skills#hasRating> ?hasrating.
?hasrating <did:ng:x:skills#rated> ?value.
?hasrating <did:ng:x:skills#skill> ?skill.
} GROUP BY ?mail ?skill
}
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:rust>), ?score, 0) AS ?rust_)
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:svelte>), ?score, 0) AS ?svelte_)
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:tailwind>), ?score, 0) AS ?tailwind_)
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:rdf>), ?score, 0) AS ?rdf_)
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:yjs>), ?score, 0) AS ?yjs_)
BIND (IF(sameTerm(?skill, <did:ng:k:skills:programming:automerge>), ?score, 0) AS ?automerge_)
BIND (?tailwind_+?svelte_+?rust_+?rdf_+?yjs_+?automerge_ AS ?total_)
} GROUP BY ?mail
ORDER BY DESC(?total)`;
const Query: FunctionComponent = () => {
const { createData, commitData, changeData } = useLdo();
const { session } = useNextGraphAuth();
const [resourceUri, setResourceUri] = useState("");
useResource(resourceUri, { subscribe: true });
const [nuri, setNuri] = useState("");
const [querying, setQuerying] = useState(false);
const [results, setResults] = useState([]);
let social_query = useSubject(SocialQueryShapeType, session.sessionId && nuri ? nuri : undefined);
React.useEffect(() => {
async function start() {
let res = await session.ng.app_request_with_nuri_command(nuri, {Fetch:"CurrentHeads"}, session.sessionId);
let request_nuri = res.V0?.Text;
console.log(request_nuri);
// finally start the social query
res = await session.ng.social_query_start(
session.sessionId,
"did:ng:a",
request_nuri,
"did:ng:d:c",
0,
);
}
if (social_query?.socialQuerySparql) {
if (!social_query?.socialQueryForwarder) {
//console.log(social_query?.socialQuerySparql);
start();
} else {
console.log("ready to receive results")
dataset.on(
[null, null, null, namedNode(resourceUri)],
(changes: DatasetChanges<Quad>) => {
session.ng.sparql_query(session.sessionId, ranking_query, undefined, resourceUri).then((res) => {
setResults(res.results?.bindings);
});
},
);
}
}
}, [resourceUri, nuri, social_query, session])
const openQuery = async () => {
setQuerying(true);
try {
let resource = await dataset.createResource("nextgraph", { primaryClass: "social:query:skills:programming" });
if (!resource.isError) {
console.log("Created resource:", resource.uri);
setResourceUri(resource.uri);
setNuri(resource.uri.substring(0,53));
const query = createData(
SocialQueryShapeType,
nuri,
resource
);
query.type = { "@id": "SocialQuery" };
const result = await commitData(query);
if (result.isError) {
console.error(result.message);
}
// then add the did:ng:x:ng#social_query_sparql
//await session.ng.sparql_update(session.sessionId,`INSERT DATA { <${nuri}> <did:ng:x:ng#social_query_sparql> \"${query_string.replaceAll("\n"," ")}\".}`, resource.uri);
let editing_query = changeData(query, resource);
editing_query.socialQuerySparql = query_string.replaceAll("\n"," ");
// const changes = transactionChanges(editing_query);
// console.log(changes.added?.toString())
// console.log(changes.removed?.toString())
let res = await commitData(editing_query);
if (res.isError) {
console.error(result.message);
}
}
else {
console.error(resource);
}
} catch (e) {
console.error(e)
}
};
if (!session.sessionId) return <></>;
return (
<div className="centered">
<div className="flex flex-col justify-center gap-5 mt-10 mb-5">
{!querying && <p className="p-3">
<button
onClick={openQuery}
onKeyPress={openQuery}
className="button select-none ml-2 mt-2 mb-2 text-white bg-primary-700 hover:bg-primary-700/90 focus:ring-4 focus:ring-primary-500/50 rounded-lg text-base p-2 text-center inline-flex items-center dark:focus:ring-primary-700/55"
>
<LifebuoyIcon tabIndex={-1} className="mr-2 focus:outline-none size-6" />
Start query
</button>
</p>
}
<div className="relative overflow-x-auto">
<table className="w-full text-sm text-left rtl:text-right text-gray-500 dark:text-gray-400 table-auto">
<thead className="text-xs text-gray-700 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400">
<tr>
<th scope="col" className="px-6 py-3">Email</th>
<th scope="col" className="px-6 py-3">Name</th>
<th scope="col" className="px-6 py-3">Rust</th>
<th scope="col" className="px-6 py-3">Svelte</th>
<th scope="col" className="px-6 py-3">Tailwind</th>
<th scope="col" className="px-6 py-3">Rdf</th>
<th scope="col" className="px-6 py-3">Yjs</th>
<th scope="col" className="px-6 py-3">Automerge</th>
<th scope="col" className="px-6 py-3">Total</th>
</tr>
</thead>
<tbody>
{
results.map((res) =>
<tr key={res.mail.value} className="bg-white border-b dark:bg-gray-800 dark:border-gray-700 border-gray-200">
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{res.mail.value}</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{res.name.value}</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.rust.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.svelte.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.tailwind.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.rdf.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.yjs.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.automerge.value * 10) / 10 }</td>
<td scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">{Math.round(res.total.value * 10) / 10 }</td>
</tr>
)
}
</tbody>
</table>
</div>
</div>
</div>
);
}
export default Query