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| XlsxTabularStreamReader | |
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| supports | |
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| getHeaders | |
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| readRowCells | |
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| extractInnerCellValue | |
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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Core\DataExchange\Infrastructure\Reader; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Core\DataExchange\Domain\Exception\DataExchangeException; |
| 12 | use Generator; |
| 13 | use XMLReader; |
| 14 | use ZipArchive; |
| 15 | |
| 16 | /** |
| 17 | * Memory-efficient streaming reader for Microsoft Excel (.xlsx) OpenXML workbooks. |
| 18 | * |
| 19 | * @package App\Core\DataExchange\Infrastructure\Reader |
| 20 | */ |
| 21 | final class XlsxTabularStreamReader implements TabularStreamReaderInterface |
| 22 | { |
| 23 | /** {@inheritdoc} */ |
| 24 | public function supports(string $filePath): bool |
| 25 | { |
| 26 | $ext = strtolower(pathinfo($filePath, PATHINFO_EXTENSION)); |
| 27 | return $ext === 'xlsx'; |
| 28 | } |
| 29 | |
| 30 | /** {@inheritdoc} */ |
| 31 | public function getHeaders(string $filePath): array |
| 32 | { |
| 33 | foreach ($this->iterateRows($filePath) as $row) { |
| 34 | return array_keys($row); |
| 35 | } |
| 36 | return []; |
| 37 | } |
| 38 | |
| 39 | /** {@inheritdoc} */ |
| 40 | public function getSampleRows(string $filePath, int $limit = 3): array |
| 41 | { |
| 42 | $sample = []; |
| 43 | $count = 0; |
| 44 | |
| 45 | foreach ($this->iterateRows($filePath) as $row) { |
| 46 | $sample[] = $row; |
| 47 | $count++; |
| 48 | if ($count >= $limit) { |
| 49 | break; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | return $sample; |
| 54 | } |
| 55 | |
| 56 | /** {@inheritdoc} */ |
| 57 | public function iterateRows(string $filePath): Generator |
| 58 | { |
| 59 | $zip = new ZipArchive(); |
| 60 | if ($zip->open($filePath) !== true) { |
| 61 | throw new DataExchangeException("Failed to open XLSX workbook: {$filePath}"); |
| 62 | } |
| 63 | |
| 64 | try { |
| 65 | $sharedStrings = $this->loadSharedStrings($zip); |
| 66 | $sheetXml = $zip->getFromName('xl/worksheets/sheet1.xml'); |
| 67 | if ($sheetXml === false) { |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | $reader = new XMLReader(); |
| 72 | $reader->XML($sheetXml); |
| 73 | |
| 74 | $headers = []; |
| 75 | $rowNum = 0; |
| 76 | |
| 77 | while ($reader->read()) { |
| 78 | if ($reader->nodeType === XMLReader::ELEMENT && $reader->name === 'row') { |
| 79 | $rowValues = $this->readRowCells($reader, $sharedStrings); |
| 80 | $rowNum++; |
| 81 | |
| 82 | if ($rowNum === 1) { |
| 83 | $headers = array_values(array_map('trim', $rowValues)); |
| 84 | continue; |
| 85 | } |
| 86 | |
| 87 | if (empty($headers)) { |
| 88 | continue; |
| 89 | } |
| 90 | |
| 91 | $mapped = []; |
| 92 | foreach ($headers as $idx => $headerKey) { |
| 93 | $mapped[$headerKey] = $rowValues[$idx] ?? ''; |
| 94 | } |
| 95 | |
| 96 | yield $rowNum => $mapped; |
| 97 | } |
| 98 | } |
| 99 | $reader->close(); |
| 100 | } finally { |
| 101 | $zip->close(); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Reads and caches the shared strings table from OpenXML workbook. |
| 107 | * |
| 108 | * @param ZipArchive $zip Open ZIP archive. |
| 109 | * @return list<string> Shared string indexed cache. |
| 110 | */ |
| 111 | private function loadSharedStrings(ZipArchive $zip): array |
| 112 | { |
| 113 | $xmlContent = $zip->getFromName('xl/sharedStrings.xml'); |
| 114 | if ($xmlContent === false) { |
| 115 | return []; |
| 116 | } |
| 117 | |
| 118 | $strings = []; |
| 119 | $xml = new XMLReader(); |
| 120 | $xml->XML($xmlContent); |
| 121 | |
| 122 | while ($xml->read()) { |
| 123 | if ($xml->nodeType === XMLReader::ELEMENT && $xml->name === 'si') { |
| 124 | $subXml = $xml->readOuterXml(); |
| 125 | $strings[] = strip_tags($subXml); |
| 126 | } |
| 127 | } |
| 128 | $xml->close(); |
| 129 | |
| 130 | return $strings; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Extracts values of all cells in a single OpenXML row. |
| 135 | * |
| 136 | * @param XMLReader $reader Active sheet XML reader. |
| 137 | * @param list<string> $sharedStrings Shared strings cache. |
| 138 | * @return list<string> Row cell values. |
| 139 | */ |
| 140 | private function readRowCells(XMLReader $reader, array $sharedStrings): array |
| 141 | { |
| 142 | $cells = []; |
| 143 | $rowSubtree = $reader->readOuterXml(); |
| 144 | |
| 145 | $cellXml = new XMLReader(); |
| 146 | $cellXml->XML($rowSubtree); |
| 147 | |
| 148 | while ($cellXml->read()) { |
| 149 | if ($cellXml->nodeType === XMLReader::ELEMENT && $cellXml->name === 'c') { |
| 150 | $type = $cellXml->getAttribute('t'); |
| 151 | $val = $this->extractInnerCellValue($cellXml); |
| 152 | |
| 153 | if ($type === 's' && is_numeric($val) && isset($sharedStrings[(int) $val])) { |
| 154 | $val = $sharedStrings[(int) $val]; |
| 155 | } |
| 156 | |
| 157 | $cells[] = trim($val); |
| 158 | } |
| 159 | } |
| 160 | $cellXml->close(); |
| 161 | |
| 162 | return $cells; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Reads inner string value from cell element node. |
| 167 | * |
| 168 | * @param XMLReader $cellXml Reader positioned on cell element. |
| 169 | * @return string Extracted raw value string. |
| 170 | */ |
| 171 | private function extractInnerCellValue(XMLReader $cellXml): string |
| 172 | { |
| 173 | while ($cellXml->read()) { |
| 174 | if ($cellXml->nodeType === XMLReader::ELEMENT |
| 175 | && ($cellXml->name === 'v' || $cellXml->name === 't') |
| 176 | ) { |
| 177 | return $cellXml->readString(); |
| 178 | } |
| 179 | if ($cellXml->nodeType === XMLReader::END_ELEMENT && $cellXml->name === 'c') { |
| 180 | break; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | return ''; |
| 185 | } |
| 186 | } |