@netwerk-digitaal-erfgoed/ld-workbench/build/utils/getSPARQLQuery.js

LDWorkbench is a Linked Data Transformation tool designed to use only SPARQL as transformation language.

import chalk from 'chalk';
import fs from 'fs';
import { Parser } from 'sparqljs';
export default function getSPARQLQuery(queryStringOrFile, type) {
    const query = queryStringOrFile.startsWith('file://')
        ? readQueryFromFile(queryStringOrFile)
        : queryStringOrFile;
    const parsed = new Parser().parse(query);
    if (parsed.type !== 'query') {
        throw new Error(`Unexpected querytype ${parsed.type}`);
    }
    if (parsed.queryType.toLowerCase() === type) {
        return parsed;
    }
    throw new Error(`Unexpected querytype ${parsed.queryType}`);
}
function readQueryFromFile(file) {
    const fileName = file.replace('file://', '');
    if (!fs.existsSync(fileName) || !fs.statSync(fileName).isFile()) {
        throw new Error(`File not found: ${chalk.italic(fileName)}`);
    }
    return fs.readFileSync(fileName, 'utf-8');
}
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