service-utilities/lib/ServiceFile.js

Utility Package for FIORI UI5

/**
 * @module ServiceFile
 * @description Utility Set for easy File Import and Export
 * @author jpanti
 * @version 1.0.0
 * @created 2025-08-01
 * @lastModified 2025-08-01
 * @license ISC
 */

sap.ui.define(["sap/ui/model/json/JSONModel"], (JSONModel) => {
  "use strict";

  return {
    // Utilities ========================================
    getAbsolutePath: (...path) => sap.ui.require.toUrl(path.join("/")),
    // ==================================================

    // Import and Export ================================
    importFileJSON: (path) =>
      new Promise(function (resolve, reject) {
        const oModel = new JSONModel();

        oModel.attachRequestCompleted(function () {
          resolve(oModel.getData());
        });

        oModel.attachRequestFailed(function (oEvent) {
          reject(new Error("Failed to load JSON from " + path));
        });

        oModel.loadData(path, null, true); // async = true
      }),
    importFileCSV: (path) => fetch(path).then((response) => response.text()),
    exportFile: (fileName, raw) => {
      const blob = new Blob([raw], { type: "text/csv;charset=utf-8;" });
      const link = document.createElement("a");
      const url = URL.createObjectURL(blob);
      link.setAttribute("href", url);
      link.setAttribute("download", fileName);
      link.style.visibility = "hidden";
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      return fileName;
    },
    // ==================================================

    // Converters =======================================
    rawToObjects(raw) {
      var objects = [];
      var headers = [];
      if (!raw || raw.trim() === "") return { objects, headers };

      const separatorLine = "\n";
      const linesRaw = raw.split(separatorLine);

      const separatorCol = ",";
      linesRaw.forEach((lineRaw, i) => {
        const object = {};
        const lineData = lineRaw.split(separatorCol);
        if (i === 0) {
          lineData.forEach((header) => headers.push(header));
        } else {
          headers.forEach((header, j) => (object[header] = lineData[j]));
          objects.push(object);
        }
      });
      return { objects, headers };
    },
    ObjectsToRaw({ objects, headers }) {
      if (!objects || !headers) return;

      const separatorCol = ",";
      const headersRaw = headers.join(separatorCol);
      const linesRaw = [];
      objects.forEach((object) => {
        if (!!object) {
          var lineRaw = [];
          headers.forEach((header) => {
            if (object.hasOwnProperty(header)) {
              lineRaw.push(object[header]);
            }
          });
          linesRaw.push(lineRaw);
        }
      });

      const separatorLine = "\n";
      const raw = [headersRaw, ...linesRaw].join(separatorLine);
      return raw;
    },
  };
  // ==================================================
});