mr-excel/src/utils/generate-formula-cell.ts

A versatile JavaScript library for effortlessly generating .xlsx files from input objects. Seamlessly create Excel spreadsheets with data, formatting, formulas, and more.

import {
  type CustomFormulaSetting,
  type FormulaSetting,
  type NoArgFormulaSetting,
  type SingleRefFormulaSetting,
  type Styles,
} from "../data-model/excel-table";

export function generateCellRowCol(
  string: string,
  formula:
    | FormulaSetting
    | SingleRefFormulaSetting
    | NoArgFormulaSetting
    | CustomFormulaSetting,
  sheetIndex: number,
  styles?: Styles
) {
  string = string.toUpperCase();
  let cell = "";
  if ((<CustomFormulaSetting>formula).formula) {
    let form = <CustomFormulaSetting>formula;
    let formulaStr =
      form.formula.indexOf("=") == 0 ? form.formula.substring(1) : form.formula;
    let multiInsertCell = string.indexOf(":") > 0;
    let ref = form.referenceCells ? form.referenceCells : string;
    let startRef = multiInsertCell
      ? string.substring(0, string.indexOf(":"))
      : string;
    let column = startRef.replace(/[0-9]/g, "");
    let row = parseInt(string.substr(column.length));
    let returnType = form.returnType
      ? form.returnType
      : form.isArray || multiInsertCell
      ? ' t="str"'
      : "";
    let style =
      "styleId" in form &&
      styles &&
      typeof form.styleId === "string" &&
      styles[form.styleId]
        ? ' s="' + styles![form.styleId!].index + '"'
        : "";
    let arrayStr =
      form.isArray || multiInsertCell ? ' t="array" ref="' + ref + '"' : "";
    cell =
      '<c r="' +
      startRef +
      '"' +
      style +
      returnType +
      "><f" +
      arrayStr +
      ">" +
      formulaStr +
      "</f></c>";
    return {
      column,
      row,
      needCalcChain: false,
      isCustom: true,
      cell,
    };
  }
  let column = string.replace(/[0-9]/g, "");
  let row = parseInt(string.substr(column.length));
  let needCalcChain = false;
  let chainCell = "";
  if ((<NoArgFormulaSetting>formula).noArgType) {
    const form = <NoArgFormulaSetting>formula;
    if (form.noArgType == "NOW" || form.noArgType == "TODAY") {
      const styleString =
        "styleId" in form &&
        styles &&
        typeof form.styleId === "string" &&
        styles[form.styleId]
          ? ' s="' + styles![form.styleId!].index + '"'
          : "";
      cell =
        '<c r="' +
        string +
        '"' +
        styleString +
        "><f>" +
        form.noArgType +
        "()</f></c>";
    } else {
      let value = "NOW()";
      const styleString =
        "styleId" in form &&
        styles &&
        typeof form.styleId === "string" &&
        styles[form.styleId]
          ? ' s="' + styles![form.styleId!].index + '"'
          : "";
      cell =
        '<c r="' +
        string +
        '"' +
        styleString +
        "><f>" +
        form.noArgType.substring(4) +
        "(" +
        value +
        ")</f></c>";
    }
    chainCell = '<c r="' + string + '" i="' + sheetIndex + '"/>';
    needCalcChain = true;
  } else if ((<SingleRefFormulaSetting>formula).referenceCell) {
    const form = <SingleRefFormulaSetting>formula;
    let value = "";
    if (typeof form.value != "undefined") {
      value = "," + form.value;
    }
    let className = "";
    if (form.type == "COT") {
      className = "_xlfn.";
    }
    const styleString =
      "styleId" in form &&
      styles &&
      typeof form.styleId === "string" &&
      styles[form.styleId]
        ? ' s="' + styles![form.styleId!].index + '"'
        : "";
    cell =
      '<c r="' +
      string +
      '"' +
      styleString +
      "><f>" +
      className +
      form.type +
      "(" +
      form.referenceCell.toUpperCase() +
      value +
      ")</f></c>";
    chainCell = '<c r="' + string + '" i="' + sheetIndex + '"/>';
    needCalcChain = true;
  } else {
    const form = <FormulaSetting>formula;
    cell =
      '<c r="' +
      string +
      '"' +
      (styles && typeof form.styleId === "string" && styles[form.styleId]
        ? ' s="' + styles[form.styleId].index + '"'
        : "") +
      ">" +
      "<f>" +
      form.type +
      "(" +
      form.start.toUpperCase() +
      ":" +
      form.end.toUpperCase() +
      ")</f>" +
      "</c>";
  }

  return {
    column,
    row,
    cell,
    needCalcChain,
    chainCell,
  };
}