release 1.0
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@@ -0,0 +1,183 @@
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<?php
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namespace UbsCsvTransformer;
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/**
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* Liest und parst CSV-Dateien
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*
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* Diese Klasse liest CSV-Dateien mit konfigurierbarem Delimiter
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* und separiert Metadaten-Zeilen von den eigentlichen Datenzeilen.
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*/
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class CsvReader
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{
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private string $filePath;
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private string $delimiter;
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private int $headerLine;
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private bool $hasBom;
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/**
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* @param string $filePath Pfad zur CSV-Datei
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* @param array $csvStructure CSV-Struktur aus Konfiguration
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*/
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public function __construct(string $filePath, array $csvStructure)
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{
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$this->filePath = $filePath;
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$this->delimiter = $csvStructure['inputDelimiter'] ?? ';';
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$this->headerLine = $csvStructure['headerLine'] ?? 1;
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$this->hasBom = $csvStructure['hasBom'] ?? false;
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}
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/**
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* Liest alle Zeilen aus der Datei
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*
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* @param int $maxLines Maximale Anzahl Zeilen (0 = alle)
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* @return array Array mit Zeilen (ohne Newlines)
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* @throws \RuntimeException wenn Datei nicht gelesen werden kann
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*/
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public function readLines(int $maxLines = 0): array
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{
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if (!file_exists($this->filePath) || !is_readable($this->filePath)) {
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throw new \RuntimeException("Konnte Datei nicht lesen: {$this->filePath}");
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}
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$lines = file($this->filePath, FILE_IGNORE_NEW_LINES);
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if ($lines === false) {
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throw new \RuntimeException("Konnte Datei nicht lesen: {$this->filePath}");
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}
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// BOM entfernen falls vorhanden
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if ($this->hasBom && !empty($lines)) {
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$lines[0] = $this->removeBom($lines[0]);
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}
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if ($maxLines > 0 && count($lines) > $maxLines) {
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$lines = array_slice($lines, 0, $maxLines);
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}
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return $lines;
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}
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/**
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* Liest die Metadaten-Zeilen (vor der Header-Zeile)
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*
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* @return array Array mit Metadaten-Zeilen
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*/
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public function readMetadataLines(): array
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{
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$lines = $this->readLines();
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if ($this->headerLine <= 1) {
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return [];
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}
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return array_slice($lines, 0, $this->headerLine - 1);
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}
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/**
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* Liest die CSV-Daten mit Headers
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*
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* @param int $maxDataRows Maximale Anzahl Datenzeilen (0 = alle)
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* @return array Array von assoziativen Arrays (mit Spalten-Namen als Keys)
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* @throws \RuntimeException wenn Header-Zeile nicht gefunden
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*/
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public function readCsvData(int $maxDataRows = 0): array
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{
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$lines = $this->readLines();
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if ($this->headerLine > count($lines)) {
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throw new \RuntimeException("Header-Zeile {$this->headerLine} nicht gefunden in Datei mit " . count($lines) . " Zeilen");
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}
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// Header parsen
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$headerLineContent = $lines[$this->headerLine - 1];
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$headers = str_getcsv($headerLineContent, $this->delimiter, '"', '\\');
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$headers = array_map(static fn(?string $v): string => trim($v ?? ''), $headers);
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// Datenzeilen parsen
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$data = [];
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$dataStartLine = $this->headerLine; // 0-basiert
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$lineCount = 0;
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for ($i = $dataStartLine; $i < count($lines); $i++) {
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if ($maxDataRows > 0 && $lineCount >= $maxDataRows) {
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break;
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}
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$lineContent = $lines[$i];
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// Leere Zeilen überspringen
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if (trim($lineContent) === '') {
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continue;
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}
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$row = str_getcsv($lineContent, $this->delimiter, '"', '\\');
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$row = array_map(static fn(?string $v): string => trim($v ?? ''), $row);
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// Zeile mit Header-Keys kombinieren
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$rowData = [];
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foreach ($headers as $index => $header) {
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$rowData[$header] = $row[$index] ?? '';
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}
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$data[] = $rowData;
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$lineCount++;
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}
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return $data;
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}
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/**
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* Gibt die Spalten-Header zurück
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*
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* @return array Array mit Spalten-Namen
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* @throws \RuntimeException wenn Header-Zeile nicht gefunden
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*/
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public function getHeaders(): array
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{
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$lines = $this->readLines();
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if ($this->headerLine > count($lines)) {
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throw new \RuntimeException("Header-Zeile {$this->headerLine} nicht gefunden");
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}
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$headerLineContent = $lines[$this->headerLine - 1];
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$headers = str_getcsv($headerLineContent, $this->delimiter, '"', '\\');
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return array_map(static fn(?string $v): string => trim($v ?? ''), $headers);
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}
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/**
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* Entfernt UTF-8 BOM (Byte Order Mark) von String
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*
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* @param string $text String mit potenziellem BOM
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* @return string String ohne BOM
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*/
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private function removeBom(string $text): string
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{
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if (str_starts_with($text, "\xEF\xBB\xBF")) {
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return substr($text, 3);
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}
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return $text;
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}
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/**
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* Gibt die Gesamtzahl der Zeilen in der Datei zurück
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*
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* @return int Anzahl Zeilen
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*/
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public function countLines(): int
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{
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return count($this->readLines());
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}
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/**
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* Gibt die Anzahl der Datenzeilen zurück (ohne Header und Metadaten)
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*
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* @return int Anzahl Datenzeilen
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*/
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public function countDataRows(): int
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{
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return count($this->readCsvData());
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}
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}
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