From a70632010f74029f5e6414aaaa464975ba51b481 Mon Sep 17 00:00:00 2001
From: Alen Turkovic <alturkovic@gmail.com>
Date: Mon, 26 Jun 2023 13:50:42 +0200
Subject: [PATCH] fix(robots-txt): Ignore user-agent case

---
 pom.xml                                          |  2 +-
 .../github/alturkovic/robots/txt/StringUtils.kt  |  2 +-
 .../alturkovic/robots/txt/RobotsTxtTest.kt       | 16 ++++++++++++++++
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/pom.xml b/pom.xml
index 45bc1ab..7975dfa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.github.alturkovic</groupId>
     <artifactId>robots-txt</artifactId>
-    <version>1.0.0</version>
+    <version>1.0.1</version>
 
     <properties>
         <java.version>1.8</java.version>
diff --git a/src/main/kotlin/com/github/alturkovic/robots/txt/StringUtils.kt b/src/main/kotlin/com/github/alturkovic/robots/txt/StringUtils.kt
index 55607cf..6972428 100644
--- a/src/main/kotlin/com/github/alturkovic/robots/txt/StringUtils.kt
+++ b/src/main/kotlin/com/github/alturkovic/robots/txt/StringUtils.kt
@@ -5,7 +5,7 @@ import kotlin.math.min
 internal object StringUtils {
     fun greatestCommonPrefix(a: String, b: String): String {
         val minLength = min(a.length, b.length)
-        for (i in 0 until minLength) if (a[i] != b[i]) return a.substring(0, i)
+        for (i in 0 until minLength) if (a[i].lowercaseChar() != b[i].lowercaseChar()) return a.substring(0, i)
         return a.substring(0, minLength)
     }
 }
diff --git a/src/test/kotlin/com/github/alturkovic/robots/txt/RobotsTxtTest.kt b/src/test/kotlin/com/github/alturkovic/robots/txt/RobotsTxtTest.kt
index c7bd007..8118fc6 100644
--- a/src/test/kotlin/com/github/alturkovic/robots/txt/RobotsTxtTest.kt
+++ b/src/test/kotlin/com/github/alturkovic/robots/txt/RobotsTxtTest.kt
@@ -118,6 +118,22 @@ private class RobotsTxtTest {
         assertThat(robotsTxt.query("BarBot", "/private/foo.txt").allowed).isFalse()
     }
 
+    @Test
+    fun shouldAllowSpecificUserAgentIgnoringCaseSensitivity() {
+        val robotsTxt = RobotsTxtReader.read(
+            """
+                User-agent: *
+                Disallow: /
+                
+                User-Agent: FooBot
+                Allow: /
+            """.trimIndent().byteInputStream()
+        )
+
+        assertThat(robotsTxt.query("fooBot", "/private/foo.txt").allowed).isTrue()
+        assertThat(robotsTxt.query("BarBot", "/private/foo.txt").allowed).isFalse()
+    }
+
     @Test
     fun shouldAllowWildcards() {
         val robotsTxt = RobotsTxtReader.read(