Function $readJSON

src/danfojs-base/io/node/io.json.ts:36–66

(filePath: string, options: JsonInputOptionsNode = {})

 * ```
 */
const $readJSON = async (filePath: string, options: JsonInputOptionsNode = {}) => {
    const { method, headers, frameConfig } = { method: "GET", headers: {}, frameConfig: {}, ...options }

    if (filePath.startsWith("http") || filePath.startsWith("https")) {

        return new Promise((resolve, reject) => {
            fetch(filePath, { method, headers }).then(response => {
                if (response.status !== 200) {
                    throw new Error(`Failed to load ${filePath}`)
                }
                response.json().then(json => {
                    resolve(new DataFrame(json, frameConfig));
                });
            }).catch((err) => {
                reject(err)
            })
        })

    } else {
        return new Promise((resolve, reject) => {
            fs.access(filePath, fs.constants.F_OK, (err) => {
                if (err) {
                    reject("ENOENT: no such file or directory");
                }
                const file = fs.readFileSync(filePath, "utf8")
                const df = new DataFrame(JSON.parse(file), frameConfig);
                resolve(df);
            })
        });
    }
};

/**
 * Streams a JSON file from local or remote location in chunks. Intermediate chunks is passed as a DataFrame to the callback function.