@tpluscode/sparql-builder/lib/partials/FROM.js

Simple JS library to build SPARQL queries

import TermSet from '@rdfjs/term-set';
import { sparql } from '@tpluscode/rdf-string';
export default function () {
    const builder = {
        defaultGraph: new TermSet(),
        fromNamed: new TermSet(),
        fromClause() {
            const clause = [...this.defaultGraph.values()].reduce((current, graph) => sparql `${current}\nFROM ${graph}`, sparql ``);
            return [...this.fromNamed.values()].reduce((current, graph) => sparql `${current}\nFROM NAMED ${graph}`, clause);
        },
    };
    return {
        ...builder,
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        FROM(defaultGraph) {
            if (!defaultGraph) {
                return {
                    NAMED: (graph) => {
                        this.fromNamed.add(graph);
                        return this;
                    },
                };
            }
            if (defaultGraph.termType === 'DefaultGraph') {
                this.defaultGraph.clear();
            }
            else {
                this.defaultGraph.add(defaultGraph);
            }
            return this;
        },
    };
}