From 18afe80d5a3bb8c71a1fe0559eb8c39c6591373e Mon Sep 17 00:00:00 2001
From: CalMWolfs <94038482+CalMWolfs@users.noreply.github.com>
Date: Sun, 8 Dec 2024 21:48:40 +1100
Subject: [PATCH] Backend: Add the regex 101 link when a pattern fails (#3034)

---
 detekt/src/main/kotlin/RepoPatternElement.kt        | 7 +++++++
 detekt/src/main/kotlin/repo/RepoPatternRegexTest.kt | 6 ++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/detekt/src/main/kotlin/RepoPatternElement.kt b/detekt/src/main/kotlin/RepoPatternElement.kt
index 3f400fa25693..2da17ce07737 100644
--- a/detekt/src/main/kotlin/RepoPatternElement.kt
+++ b/detekt/src/main/kotlin/RepoPatternElement.kt
@@ -8,6 +8,7 @@ import org.jetbrains.kotlin.psi.KtProperty
 import org.jetbrains.kotlin.psi.KtPropertyDelegate
 import org.jetbrains.kotlin.psi.KtStringTemplateEntryWithExpression
 import org.jetbrains.kotlin.psi.KtStringTemplateExpression
+import java.net.URLEncoder
 
 class RepoPatternElement private constructor(
     val variableName: String,
@@ -18,6 +19,12 @@ class RepoPatternElement private constructor(
 
     val pattern by lazy { rawPattern.toPattern() }
 
+    val regex101Url: String by lazy {
+        val encodedPattern = URLEncoder.encode(rawPattern, "UTF-8")
+        val encodedTests = regexTests.joinToString("\n") { URLEncoder.encode(it, "UTF-8") }
+        "https://regex101.com/?regex=$encodedPattern&testString=$encodedTests"
+    }
+
     companion object {
         fun KtPropertyDelegate.asRepoPatternElement(): RepoPatternElement? {
             val expression = this.expression as? KtDotQualifiedExpression ?: return null
diff --git a/detekt/src/main/kotlin/repo/RepoPatternRegexTest.kt b/detekt/src/main/kotlin/repo/RepoPatternRegexTest.kt
index ac68ed5e4a3d..92fc5e1943dc 100644
--- a/detekt/src/main/kotlin/repo/RepoPatternRegexTest.kt
+++ b/detekt/src/main/kotlin/repo/RepoPatternRegexTest.kt
@@ -32,13 +32,15 @@ class RepoPatternRegexTest(config: Config) : SkyHanniRule(config) {
 
         repoPatternElement.regexTests.forEach { test ->
             if (!repoPatternElement.pattern.matcher(test).find()) {
-                delegate.reportIssue("Repo pattern `$variableName` failed regex test: `$test` pattern: `$rawPattern`.")
+                delegate.reportIssue("Repo pattern `$variableName` failed regex test: `$test` pattern: `$rawPattern`. " +
+                    "[View on Regex101](${repoPatternElement.regex101Url})")
             }
         }
 
         repoPatternElement.failingRegexTests.forEach { test ->
             if (repoPatternElement.pattern.matcher(test).find()) {
-                delegate.reportIssue("Repo pattern `$variableName` passed regex test: `$test` pattern: `$rawPattern` even though it was set to fail.")
+                delegate.reportIssue("Repo pattern `$variableName` passed regex test: `$test` pattern: `$rawPattern` " +
+                    "even though it was set to fail. [View on Regex101](${repoPatternElement.regex101Url})")
             }
         }
     }