git init

app/Services/DataSetReader.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Services;
+
+class DataSetReader {
+    public array $lines = [];
+    private array $currentLines = [];
+
+    private int $lastReadLineIndex = -1;
+
+    public function __construct(
+        public string $filename,
+    ) {
+        // For now, we only support CSV files, so we can delegate to CsvReader
+        $csvReader = new CsvReader($filename);
+        $this->readEntireFile($csvReader);
+        $this->reset();
+    }
+
+    private function readEntireFile(CsvReader $reader): void
+    {
+        while ($line = $reader->readNextLine()) {
+            $this->lines[] = $line;
+        }
+    }
+
+    public function getRandomLine(): array | null
+    {
+        if (empty($this->currentLines)) {
+            return null; // No more lines to read
+        }
+        $randomNumber = array_rand($this->currentLines);
+        $randomLine = $this->currentLines[$randomNumber];
+        // Remove the line from the current lines to avoid repetition
+        unset($this->currentLines[$randomNumber]);
+        $this->lastReadLineIndex = array_search($randomLine, $this->lines, true);
+        return $randomLine;
+    }
+
+    public function reset(): void
+    {
+        $this->currentLines = $this->lines;
+    }
+
+    public function getLastReadLineIndex(): int
+    {
+        return $this->lastReadLineIndex;
+    }
+}