react-data-export/dist/ExcelPlugin/utils/DataUtil.js

A set of tools to export dataset from react to different formats.

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.excelSheetFromDataSet = exports.excelSheetFromAoA = exports.dateToNumber = exports.strToArrBuffer = undefined;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _tempaXlsx = require('tempa-xlsx');

var _tempaXlsx2 = _interopRequireDefault(_tempaXlsx);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var strToArrBuffer = function strToArrBuffer(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);

    for (var i = 0; i != s.length; ++i) {
        view[i] = s.charCodeAt(i) & 0xFF;
    }

    return buf;
};

var dateToNumber = function dateToNumber(v, date1904) {
    if (date1904) {
        v += 1462;
    }

    var epoch = Date.parse(v);

    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
};

var excelSheetFromDataSet = function excelSheetFromDataSet(dataSet) {
    /*
    Assuming the structure of dataset
    {
        xSteps?: number; //How many cells to skips from left
        ySteps?: number; //How many rows to skips from last data
        columns: [array | string]
        data: [array_of_array | string|boolean|number | CellObject]
        fill, font, numFmt, alignment, and border
    }
     */
    if (dataSet === undefined || dataSet.length === 0) {
        return {};
    }

    var ws = {};
    var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };
    var rowCount = 0;

    dataSet.forEach(function (dataSetItem) {
        var columns = dataSetItem.columns;
        var xSteps = typeof dataSetItem.xSteps === 'number' ? dataSetItem.xSteps : 0;
        var ySteps = typeof dataSetItem.ySteps === 'number' ? dataSetItem.ySteps : 0;
        var data = dataSetItem.data;
        if (dataSet === undefined || dataSet.length === 0) {
            return;
        }

        rowCount += ySteps;

        var columnsWidth = [];
        if (columns.length >= 0) {
            columns.forEach(function (col, index) {
                var cellRef = _tempaXlsx2.default.utils.encode_cell({ c: xSteps + index, r: rowCount });
                fixRange(range, 0, 0, rowCount, xSteps, ySteps);
                var colTitle = col;
                if ((typeof col === 'undefined' ? 'undefined' : _typeof(col)) === 'object') {
                    //colTitle = col.title; //moved to getHeaderCell
                    columnsWidth.push(col.width || { wpx: 80 }); /* wch (chars), wpx (pixels) - e.g. [{wch:6},{wpx:50}] */
                }
                getHeaderCell(colTitle, cellRef, ws);
            });

            rowCount += 1;
        }

        if (columnsWidth.length > 0) {
            ws['!cols'] = columnsWidth;
        }

        for (var R = 0; R != data.length; ++R, rowCount++) {
            for (var C = 0; C != data[R].length; ++C) {
                var cellRef = _tempaXlsx2.default.utils.encode_cell({ c: C + xSteps, r: rowCount });
                fixRange(range, R, C, rowCount, xSteps, ySteps);
                getCell(data[R][C], cellRef, ws);
            }
        }
    });

    if (range.s.c < 10000000) {
        ws['!ref'] = _tempaXlsx2.default.utils.encode_range(range);
    }

    return ws;
};

function getHeaderCell(v, cellRef, ws) {
    var cell = {};
    var headerCellStyle = v.style ? v.style : { font: { bold: true } }; //if style is then use it
    cell.v = v.title;
    cell.t = 's';
    cell.s = headerCellStyle;
    ws[cellRef] = cell;
}

function getCell(v, cellRef, ws) {
    //assume v is indeed the value. for other cases (object, date...) it will be overriden.
    var cell = { v: v };
    if (v === null) {
        return;
    }

    var isDate = v instanceof Date;
    if (!isDate && (typeof v === 'undefined' ? 'undefined' : _typeof(v)) === 'object') {
        cell.s = v.style;
        cell.v = v.value;
        v = v.value;
    }

    if (typeof v === 'number') {
        cell.t = 'n';
    } else if (typeof v === 'boolean') {
        cell.t = 'b';
    } else if (isDate) {
        cell.t = 'n';
        cell.z = _tempaXlsx2.default.SSF._table[14];
        cell.v = dateToNumber(cell.v);
    } else {
        cell.t = 's';
    }
    ws[cellRef] = cell;
}

function fixRange(range, R, C, rowCount, xSteps, ySteps) {
    if (range.s.r > R + rowCount) {
        range.s.r = R + rowCount;
    }

    if (range.s.c > C + xSteps) {
        range.s.c = C + xSteps;
    }

    if (range.e.r < R + rowCount) {
        range.e.r = R + rowCount;
    }

    if (range.e.c < C + xSteps) {
        range.e.c = C + xSteps;
    }
}

var excelSheetFromAoA = function excelSheetFromAoA(data) {
    var ws = {};
    var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };

    for (var R = 0; R != data.length; ++R) {
        for (var C = 0; C != data[R].length; ++C) {
            if (range.s.r > R) {
                range.s.r = R;
            }

            if (range.s.c > C) {
                range.s.c = C;
            }

            if (range.e.r < R) {
                range.e.r = R;
            }

            if (range.e.c < C) {
                range.e.c = C;
            }

            var cell = { v: data[R][C] };
            if (cell.v === null) {
                continue;
            }

            var cellRef = _tempaXlsx2.default.utils.encode_cell({ c: C, r: R });
            if (typeof cell.v === 'number') {
                cell.t = 'n';
            } else if (typeof cell.v === 'boolean') {
                cell.t = 'b';
            } else if (cell.v instanceof Date) {
                cell.t = 'n';
                cell.z = _tempaXlsx2.default.SSF._table[14];
                cell.v = dateToNumber(cell.v);
            } else {
                cell.t = 's';
            }

            ws[cellRef] = cell;
        }
    }

    if (range.s.c < 10000000) {
        ws['!ref'] = _tempaXlsx2.default.utils.encode_range(range);
    }

    return ws;
};

exports.strToArrBuffer = strToArrBuffer;
exports.dateToNumber = dateToNumber;
exports.excelSheetFromAoA = excelSheetFromAoA;
exports.excelSheetFromDataSet = excelSheetFromDataSet;