From da0bd3f09442e0b92a43bb97763283fd0dcda411 Mon Sep 17 00:00:00 2001
From: Luke Visinoni <luke.visinoni@gmail.com>
Date: Tue, 24 Jul 2018 22:29:27 -0700
Subject: [PATCH] getRow now accepts negative offsets (although performance
 won't be as good when using negative offsets since the entire set has to be
 pulled)

---
 src/CSVelte/Reader.php       |  3 +++
 tests/CSVelte/ReaderTest.php | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/src/CSVelte/Reader.php b/src/CSVelte/Reader.php
index 93f74f8..aa63931 100644
--- a/src/CSVelte/Reader.php
+++ b/src/CSVelte/Reader.php
@@ -106,6 +106,9 @@ public function getDialect()
     public function getRow($offset = null)
     {
         if (!is_null($offset)) {
+            if ($offset < 0) {
+                return collect($this->toArray())->getValueAt($offset);
+            }
             foreach ($this as $key => $row) {
                 if ($key === $offset) {
                     return $row;
diff --git a/tests/CSVelte/ReaderTest.php b/tests/CSVelte/ReaderTest.php
index acbad4b..1d9b06c 100644
--- a/tests/CSVelte/ReaderTest.php
+++ b/tests/CSVelte/ReaderTest.php
@@ -162,6 +162,39 @@ public function testGetRowUsingOffsetReturnsRowAtGivenOffset()
         ], $reader->getRow(25));
     }
 
+    public function testGetRowUsingNegativeOffsetReturnsRowAtGivenOffset()
+    {
+        $source = to_stream(fopen($this->getFilePathFor('commaNewlineHeader'), 'r+'));
+        $reader = new Reader($source);
+        $this->assertSame([
+            "Bank Name" => "Vantage Point Bank",
+            "City" => "Horsham",
+            "ST" => "PA",
+            "CERT" => "58531",
+            "Acquiring Institution" => "First Choice Bank",
+            "Closing Date" => "28-Feb-14",
+            "Updated Date" => "3-Mar-15"
+        ], $reader->getRow(-5));
+        $this->assertSame([
+            "Bank Name" => "Valley Bank",
+            "City" => "Moline",
+            "ST" => "IL",
+            "CERT" => "10450",
+            "Acquiring Institution" => "Great Southern Bank",
+            "Closing Date" => "20-Jun-14",
+            "Updated Date" => "26-Jun-15"
+        ], $reader->getRow(-10));
+        $this->assertSame([
+            "Bank Name" => "The Bank of Georgia",
+            "City" => "Peachtree City",
+            "ST" => "GA",
+            "CERT" => "35259",
+            "Acquiring Institution" => "Fidelity Bank",
+            "Closing Date" => "2-Oct-15",
+            "Updated Date" => "13-Apr-16"
+        ], $reader->getRow(-25));
+    }
+
     public function testGetColumnReturnsColumn()
     {
         $source = to_stream(fopen($this->getFilePathFor('commaNewlineHeader'), 'r+'));