<?php

namespace PhpOffice\PhpSpreadsheet\Reader;

use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Reader\Exception as ReaderException;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Style\Border;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;

class Slk extends BaseReader
{
    /**
     * Input encoding.
     *
     * @var string
     */
    private $inputEncoding = 'ANSI';

    /**
     * Sheet index to read.
     *
     * @var int
     */
    private $sheetIndex = 0;

    /**
     * Formats.
     *
     * @var array
     */
    private $formats = [];

    /**
     * Format Count.
     *
     * @var int
     */
    private $format = 0;

    /**
     * Fonts.
     *
     * @var array
     */
    private $fonts = [];

    /**
     * Font Count.
     *
     * @var int
     */
    private $fontcount = 0;

    /**
     * Create a new SYLK Reader instance.
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Validate that the current file is a SYLK file.
     */
    public function canRead(string $filename): bool
    {
        try {
            $this->openFile($filename);
        } catch (ReaderException $e) {
            return false;
        }

        // Read sample data (first 2 KB will do)
        $data = (string) fread($this->fileHandle, 2048);

        // Count delimiters in file
        $delimiterCount = substr_count($data, ';');
        $hasDelimiter = $delimiterCount > 0;

        // Analyze first line looking for ID; signature
        $lines = explode("\n", $data);
        $hasId = substr($lines[0], 0, 4) === 'ID;P';

        fclose($this->fileHandle);

        return $hasDelimiter && $hasId;
    }

    private function canReadOrBust(string $filename): void
    {
        if (!$this->canRead($filename)) {
            throw new ReaderException($filename . ' is an Invalid SYLK file.');
        }
        $this->openFile($filename);
    }

    /**
     * Set input encoding.
     *
     * @deprecated no use is made of this property
     *
     * @param string $inputEncoding Input encoding, eg: 'ANSI'
     *
     * @return $this
     *
     * @codeCoverageIgnore
     */
    public function setInputEncoding($inputEncoding)
    {
        $this->inputEncoding = $inputEncoding;

        return $this;
    }

    /**
     * Get input encoding.
     *
     * @deprecated no use is made of this property
     *
     * @return string
     *
     * @codeCoverageIgnore
     */
    public function getInputEncoding()
    {
        return $this->inputEncoding;
    }

    /**
     * Return worksheet info (Name, Last Column Letter, Last Column Index, Total Rows, Total Columns).
     *
     * @param string $filename
     *
     * @return array
     */
    public function listWorksheetInfo($filename)
    {
        // Open file
        $this->canReadOrBust($filename);
        $fileHandle = $this->fileHandle;
        rewind($fileHandle);

        $worksheetInfo = [];
        $worksheetInfo[0]['worksheetName'] = basename($filename, '.slk');

        // loop through one row (line) at a time in the file
        $rowIndex = 0;
        $columnIndex = 0;
        while (($rowData = fgets($fileHandle)) !== false) {
            $columnIndex = 0;

            // convert SYLK encoded $rowData to UTF-8
            $rowData = StringHelper::SYLKtoUTF8($rowData);

            // explode each row at semicolons while taking into account that literal semicolon (;)
            // is escaped like this (;;)
            $rowData = explode("\t", str_replace('¤', ';', str_replace(';', "\t", str_replace(';;', '¤', rtrim($rowData)))));

            $dataType = array_shift($rowData);
            if ($dataType == 'B') {
                foreach ($rowData as $rowDatum) {
                    switch ($rowDatum[0]) {
                        case 'X':
                            $columnIndex = (int) substr($rowDatum, 1) - 1;

                            break;
                        case 'Y':
                            $rowIndex = substr($rowDatum, 1);

                            break;
                    }
                }

                break;
            }
        }

        $worksheetInfo[0]['lastColumnIndex'] = $columnIndex;
        $worksheetInfo[0]['totalRows'] = $rowIndex;
        $worksheetInfo[0]['lastColumnLetter'] = Coordinate::stringFromColumnIndex($worksheetInfo[0]['lastColumnIndex'] + 1);
        $worksheetInfo[0]['totalColumns'] = $worksheetInfo[0]['lastColumnIndex'] + 1;

        // Close file
        fclose($fileHandle);

        return $worksheetInfo;
    }

    /**
     * Loads PhpSpreadsheet from file.
     */
    protected function loadSpreadsheetFromFile(string $filename): Spreadsheet
    {
        // Create new Spreadsheet
        $spreadsheet = new Spreadsheet();

        // Load into this instance
        return $this->loadIntoExisting($filename, $spreadsheet);
    }

    private const COLOR_ARRAY = [
        'FF00FFFF', // 0 - cyan
        'FF000000', // 1 - black
        'FFFFFFFF', // 2 - white
        'FFFF0000', // 3 - red
        'FF00FF00', // 4 - green
        'FF0000FF', // 5 - blue
        'FFFFFF00', // 6 - yellow
        'FFFF00FF', // 7 - magenta
    ];

    private const FONT_STYLE_MAPPINGS = [
        'B' => 'bold',
        'I' => 'italic',
        'U' => 'underline',
    ];

    private function processFormula(string $rowDatum, bool &$hasCalculatedValue, string &$cellDataFormula, string $row, string $column): void
    {
        $cellDataFormula = '=' . substr($rowDatum, 1);
        //    Convert R1C1 style references to A1 style references (but only when not quoted)
        $temp = explode('"', $cellDataFormula);
        $key = false;
        foreach ($temp as &$value) {
            //    Only count/replace in alternate array entries
            $key = $key === false;
            if ($key) {
                preg_match_all('/(R(\[?-?\d*\]?))(C(\[?-?\d*\]?))/', $value, $cellReferences, PREG_SET_ORDER + PREG_OFFSET_CAPTURE);
                //    Reverse the matches array, otherwise all our offsets will become incorrect if we modify our way
                //        through the formula from left to right. Reversing means that we work right to left.through
                //        the formula
                $cellReferences = array_reverse($cellReferences);
                //    Loop through each R1C1 style reference in turn, converting it to its A1 style equivalent,
                //        then modify the formula to use that new reference
                foreach ($cellReferences as $cellReference) {
                    $rowReference = $cellReference[2][0];
                    //    Empty R reference is the current row
                    if ($rowReference == '') {
                        $rowReference = $row;
                    }
                    //    Bracketed R references are relative to the current row
                    if ($rowReference[0] == '[') {
                        $rowReference = (int) $row + (int) trim($rowReference, '[]');
                    }
                    $columnReference = $cellReference[4][0];
                    //    Empty C reference is the current column
                    if ($columnReference == '') {
                        $columnReference = $column;
                    }
                    //    Bracketed C references are relative to the current column
                    if ($columnReference[0] == '[') {
                        $columnReference = (int) $column + (int) trim($columnReference, '[]');
                    }
                    $A1CellReference = Coordinate::stringFromColumnIndex((int) $columnReference) . $rowReference;

                    $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
                }
            }
        }
        unset($value);
        //    Then rebuild the formula string
        $cellDataFormula = implode('"', $temp);
        $hasCalculatedValue = true;
    }

    private function processCRecord(array $rowData, Spreadsheet &$spreadsheet, string &$row, string &$column): void
    {
        //    Read cell value data
        $hasCalculatedValue = false;
        $cellDataFormula = $cellData = '';
        foreach ($rowData as $rowDatum) {
            switch ($rowDatum[0]) {
                case 'C':
                case 'X':
                    $column = substr($rowDatum, 1);

                    break;
                case 'R':
                case 'Y':
                    $row = substr($rowDatum, 1);

                    break;
                case 'K':
                    $cellData = substr($rowDatum, 1);

                    break;
                case 'E':
                    $this->processFormula($rowDatum, $hasCalculatedValue, $cellDataFormula, $row, $column);

                    break;
                case 'A':
                    $comment = substr($rowDatum, 1);
                    $columnLetter = Coordinate::stringFromColumnIndex((int) $column);
                    $spreadsheet->getActiveSheet()
                        ->getComment("$columnLetter$row")
                        ->getText()
                        ->createText($comment);

                    break;
            }
        }
        $columnLetter = Coordinate::stringFromColumnIndex((int) $column);
        $cellData = Calculation::unwrapResult($cellData);

        // Set cell value
        $this->processCFinal($spreadsheet, $hasCalculatedValue, $cellDataFormula, $cellData, "$columnLetter$row");
    }

    private function processCFinal(Spreadsheet &$spreadsheet, bool $hasCalculatedValue, string $cellDataFormula, string $cellData, string $coordinate): void
    {
        // Set cell value
        $spreadsheet->getActiveSheet()->getCell($coordinate)->setValue(($hasCalculatedValue) ? $cellDataFormula : $cellData);
        if ($hasCalculatedValue) {
            $cellData = Calculation::unwrapResult($cellData);
            $spreadsheet->getActiveSheet()->getCell($coordinate)->setCalculatedValue($cellData);
        }
    }

    private function processFRecord(array $rowData, Spreadsheet &$spreadsheet, string &$row, string &$column): void
    {
        //    Read cell formatting
        $formatStyle = $columnWidth = '';
        $startCol = $endCol = '';
        $fontStyle = '';
        $styleData = [];
        foreach ($rowData as $rowDatum) {
            switch ($rowDatum[0]) {
                case 'C':
                case 'X':
                    $column = substr($rowDatum, 1);

                    break;
                case 'R':
                case 'Y':
                    $row = substr($rowDatum, 1);

                    break;
                case 'P':
                    $formatStyle = $rowDatum;

                    break;
                case 'W':
                    [$startCol, $endCol, $columnWidth] = explode(' ', substr($rowDatum, 1));

                    break;
                case 'S':
                    $this->styleSettings($rowDatum, $styleData, $fontStyle);

                    break;
            }
        }
        $this->addFormats($spreadsheet, $formatStyle, $row, $column);
        $this->addFonts($spreadsheet, $fontStyle, $row, $column);
        $this->addStyle($spreadsheet, $styleData, $row, $column);
        $this->addWidth($spreadsheet, $columnWidth, $startCol, $endCol);
    }

    private const STYLE_SETTINGS_FONT = ['D' => 'bold', 'I' => 'italic'];

    private const STYLE_SETTINGS_BORDER = [
        'B' => 'bottom',
        'L' => 'left',
        'R' => 'right',
        'T' => 'top',
    ];

    private function styleSettings(string $rowDatum, array &$styleData, string &$fontStyle): void
    {
        $styleSettings = substr($rowDatum, 1);
        $iMax = strlen($styleSettings);
        for ($i = 0; $i < $iMax; ++$i) {
            $char = $styleSettings[$i];
            if (array_key_exists($char, self::STYLE_SETTINGS_FONT)) {
                $styleData['font'][self::STYLE_SETTINGS_FONT[$char]] = true;
            } elseif (array_key_exists($char, self::STYLE_SETTINGS_BORDER)) {
                $styleData['borders'][self::STYLE_SETTINGS_BORDER[$char]]['borderStyle'] = Border::BORDER_THIN;
            } elseif ($char == 'S') {
                $styleData['fill']['fillType'] = \PhpOffice\PhpSpreadsheet\Style\Fill::FILL_PATTERN_GRAY125;
            } elseif ($char == 'M') {
                if (preg_match('/M([1-9]\\d*)/', $styleSettings, $matches)) {
                    $fontStyle = $matches[1];
                }
            }
        }
    }

    private function addFormats(Spreadsheet &$spreadsheet, string $formatStyle, string $row, string $column): void
    {
        if ($formatStyle && $column > '' && $row > '') {
            $columnLetter = Coordinate::stringFromColumnIndex((int) $column);
            if (isset($this->formats[$formatStyle])) {
                $spreadsheet->getActiveSheet()->getStyle($columnLetter . $row)->applyFromArray($this->formats[$formatStyle]);
            }
        }
    }

    private function addFonts(Spreadsheet &$spreadsheet, string $fontStyle, string $row, string $column): void
    {
        if ($fontStyle && $column > '' && $row > '') {
            $columnLetter = Coordinate::stringFromColumnIndex((int) $column);
            if (isset($this->fonts[$fontStyle])) {
                $spreadsheet->getActiveSheet()->getStyle($columnLetter . $row)->applyFromArray($this->fonts[$fontStyle]);
            }
        }
    }

    private function addStyle(Spreadsheet &$spreadsheet, array $styleData, string $row, string $column): void
    {
        if ((!empty($styleData)) && $column > '' && $row > '') {
            $columnLetter = Coordinate::stringFromColumnIndex((int) $column);
            $spreadsheet->getActiveSheet()->getStyle($columnLetter . $row)->applyFromArray($styleData);
        }
    }

    private function addWidth(Spreadsheet $spreadsheet, string $columnWidth, string $startCol, string $endCol): void
    {
        if ($columnWidth > '') {
            if ($startCol == $endCol) {
                $startCol = Coordinate::stringFromColumnIndex((int) $startCol);
                $spreadsheet->getActiveSheet()->getColumnDimension($startCol)->setWidth((float) $columnWidth);
            } else {
                $startCol = Coordinate::stringFromColumnIndex((int) $startCol);
                $endCol = Coordinate::stringFromColumnIndex((int) $endCol);
                $spreadsheet->getActiveSheet()->getColumnDimension($startCol)->setWidth((float) $columnWidth);
                do {
                    $spreadsheet->getActiveSheet()->getColumnDimension(++$startCol)->setWidth((float) $columnWidth);
                } while ($startCol !== $endCol);
            }
        }
    }

    private function processPRecord(array $rowData, Spreadsheet &$spreadsheet): void
    {
        //    Read shared styles
        $formatArray = [];
        $fromFormats = ['\-', '\ '];
        $toFormats = ['-', ' '];
        foreach ($rowData as $rowDatum) {
            switch ($rowDatum[0]) {
                case 'P':
                    $formatArray['numberFormat']['formatCode'] = str_replace($fromFormats, $toFormats, substr($rowDatum, 1));

                    break;
                case 'E':
                case 'F':
                    $formatArray['font']['name'] = substr($rowDatum, 1);

                    break;
                case 'M':
                    $formatArray['font']['size'] = ((float) substr($rowDatum, 1)) / 20;

                    break;
                case 'L':
                    $this->processPColors($rowDatum, $formatArray);

                    break;
                case 'S':
                    $this->processPFontStyles($rowDatum, $formatArray);

                    break;
            }
        }
        $this->processPFinal($spreadsheet, $formatArray);
    }

    private function processPColors(string $rowDatum, array &$formatArray): void
    {
        if (preg_match('/L([1-9]\\d*)/', $rowDatum, $matches)) {
            $fontColor = $matches[1] % 8;
            $formatArray['font']['color']['argb'] = self::COLOR_ARRAY[$fontColor];
        }
    }

    private function processPFontStyles(string $rowDatum, array &$formatArray): void
    {
        $styleSettings = substr($rowDatum, 1);
        $iMax = strlen($styleSettings);
        for ($i = 0; $i < $iMax; ++$i) {
            if (array_key_exists($styleSettings[$i], self::FONT_STYLE_MAPPINGS)) {
                $formatArray['font'][self::FONT_STYLE_MAPPINGS[$styleSettings[$i]]] = true;
            }
        }
    }

    private function processPFinal(Spreadsheet &$spreadsheet, array $formatArray): void
    {
        if (array_key_exists('numberFormat', $formatArray)) {
            $this->formats['P' . $this->format] = $formatArray;
            ++$this->format;
        } elseif (array_key_exists('font', $formatArray)) {
            ++$this->fontcount;
            $this->fonts[$this->fontcount] = $formatArray;
            if ($this->fontcount === 1) {
                $spreadsheet->getDefaultStyle()->applyFromArray($formatArray);
            }
        }
    }

    /**
     * Loads PhpSpreadsheet from file into PhpSpreadsheet instance.
     *
     * @param string $filename
     *
     * @return Spreadsheet
     */
    public function loadIntoExisting($filename, Spreadsheet $spreadsheet)
    {
        // Open file
        $this->canReadOrBust($filename);
        $fileHandle = $this->fileHandle;
        rewind($fileHandle);

        // Create new Worksheets
        while ($spreadsheet->getSheetCount() <= $this->sheetIndex) {
            $spreadsheet->createSheet();
        }
        $spreadsheet->setActiveSheetIndex($this->sheetIndex);
        $spreadsheet->getActiveSheet()->setTitle(substr(basename($filename, '.slk'), 0, Worksheet::SHEET_TITLE_MAXIMUM_LENGTH));

        // Loop through file
        $column = $row = '';

        // loop through one row (line) at a time in the file
        while (($rowDataTxt = fgets($fileHandle)) !== false) {
            // convert SYLK encoded $rowData to UTF-8
            $rowDataTxt = StringHelper::SYLKtoUTF8($rowDataTxt);

            // explode each row at semicolons while taking into account that literal semicolon (;)
            // is escaped like this (;;)
            $rowData = explode("\t", str_replace('¤', ';', str_replace(';', "\t", str_replace(';;', '¤', rtrim($rowDataTxt)))));

            $dataType = array_shift($rowData);
            if ($dataType == 'P') {
                //    Read shared styles
                $this->processPRecord($rowData, $spreadsheet);
            } elseif ($dataType == 'C') {
                //    Read cell value data
                $this->processCRecord($rowData, $spreadsheet, $row, $column);
            } elseif ($dataType == 'F') {
                //    Read cell formatting
                $this->processFRecord($rowData, $spreadsheet, $row, $column);
            } else {
                $this->columnRowFromRowData($rowData, $column, $row);
            }
        }

        // Close file
        fclose($fileHandle);

        // Return
        return $spreadsheet;
    }

    private function columnRowFromRowData(array $rowData, string &$column, string &$row): void
    {
        foreach ($rowData as $rowDatum) {
            $char0 = $rowDatum[0];
            if ($char0 === 'X' || $char0 == 'C') {
                $column = substr($rowDatum, 1);
            } elseif ($char0 === 'Y' || $char0 == 'R') {
                $row = substr($rowDatum, 1);
            }
        }
    }

    /**
     * Get sheet index.
     *
     * @return int
     */
    public function getSheetIndex()
    {
        return $this->sheetIndex;
    }

    /**
     * Set sheet index.
     *
     * @param int $sheetIndex Sheet index
     *
     * @return $this
     */
    public function setSheetIndex($sheetIndex)
    {
        $this->sheetIndex = $sheetIndex;

        return $this;
    }
}

• [D] Csv
• [D] Gnumeric
• [D] Ods
• [D] Security
• [D] Xls
• [D] Xlsx
• [D] Xml
• [F] BaseReader.php
  Delete
• [F] Csv.php
  Delete
• [F] DefaultReadFilter.php
  Delete
• [F] Exception.php
  Delete
• [F] Gnumeric.php
  Delete
• [F] Html.php
  Delete
• [F] IReader.php
  Delete
• [F] IReadFilter.php
  Delete
• [F] Ods.php
  Delete
• [F] Slk.php
  Delete
• [F] Xls.php
  Delete
• [F] Xlsx.php
  Delete
• [F] Xml.php
  Delete

About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard