@alinex/datastore/lib/format/xlsx.js

Read, work and write data structures from and to differents locations and formats.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.format = exports.parse = void 0;
const path_1 = require("path");
const debug_1 = require("debug");
const flat = require("flat");
const XLSX = require("xlsx");
const debug = debug_1.default("datastore:format:xlsx");
function toObject(arr, recordFormat) {
    let res = recordFormat ? [] : {};
    arr.forEach(row => {
        if (recordFormat) {
            res.push(flat.unflatten(row));
        }
        else {
            res[row[0]] = row[1] === "" ? null : row[1];
        }
    });
    return recordFormat ? res : flat.unflatten(res);
}
function toArray(obj) {
    let res = [];
    if (Array.isArray(obj)) {
        Object.keys(obj).forEach(key => {
            res.push(flat.flatten(obj[key]));
        });
    }
    else {
        obj = flat.flatten(obj);
        Object.keys(obj).forEach(key => {
            res.push([key, obj[key]]);
        });
    }
    return res;
}
const parse = function (parsedUri, buffer, options) {
    if (!parsedUri.pathname)
        return Promise.reject(`No pathname given in ${parsedUri.href}`);
    const pathname = parsedUri.hash || path_1.basename(parsedUri.pathname);
    debug(`parsing ${pathname}`);
    const wb = XLSX.read(buffer, { type: 'buffer', cellDates: true });
    const ws = wb.Sheets[wb.SheetNames[0]];
    const work = XLSX.utils.sheet_to_json(ws);
    let colls = [];
    work.forEach(row => {
        if (colls.length < Object.keys(work[0]).length)
            colls = Object.keys(work[0]);
    });
    work.forEach(row => {
        colls.forEach(coll => {
            if (typeof row[coll] == 'undefined')
                row[coll] = null;
        });
    });
    let recordFormat = (options && options.records) || Object.keys(work[0]).length > 2;
    return Promise.resolve(toObject(work, recordFormat));
};
exports.parse = parse;
const format = function (parsedUri, data) {
    if (!parsedUri.pathname)
        return Promise.reject(`No pathname given in ${parsedUri.href}`);
    const pathname = parsedUri.hash || path_1.basename(parsedUri.pathname);
    debug(`formatting for ${pathname}`);
    const list = toArray(data);
    const ws = XLSX.utils.json_to_sheet(list);
    const wb = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(wb, ws, "Data");
    return Promise.resolve(XLSX.write(wb, { type: 'buffer', bookType: 'xlsx' }));
};
exports.format = format;
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