From de92b1351f10f9211830358bd225bb768131d6b4 Mon Sep 17 00:00:00 2001
From: arkon <eugcheung94@gmail.com>
Date: Fri, 22 Sep 2023 16:42:04 -0400
Subject: [PATCH] Add WebView-based user agent string to debug info

Could probably use this when choosing a user agent later on.
---
 .../eu/kanade/tachiyomi/util/CrashLogUtil.kt  |  2 ++
 .../tachiyomi/util/system/WebViewUtil.kt      | 19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/CrashLogUtil.kt b/app/src/main/java/eu/kanade/tachiyomi/util/CrashLogUtil.kt
index aa9830de82..c495c70082 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/CrashLogUtil.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/CrashLogUtil.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.os.Build
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.util.storage.getUriCompat
+import eu.kanade.tachiyomi.util.system.WebViewUtil
 import eu.kanade.tachiyomi.util.system.createFileInCacheDir
 import eu.kanade.tachiyomi.util.system.toShareIntent
 import eu.kanade.tachiyomi.util.system.toast
@@ -35,6 +36,7 @@ class CrashLogUtil(private val context: Context) {
             Device name: ${Build.DEVICE}
             Device model: ${Build.MODEL}
             Device product name: ${Build.PRODUCT}
+            WebView user agent: ${WebViewUtil.getInferredUserAgent(context)}
         """.trimIndent()
     }
 }
diff --git a/core/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt b/core/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
index 4fcaaceed2..eb1ad9617e 100644
--- a/core/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
+++ b/core/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
@@ -14,7 +14,24 @@ import kotlin.coroutines.resume
 object WebViewUtil {
     const val SPOOF_PACKAGE_NAME = "org.chromium.chrome"
 
-    const val MINIMUM_WEBVIEW_VERSION = 111
+    const val MINIMUM_WEBVIEW_VERSION = 114
+
+    /**
+     * Uses the WebView's user agent string to create something similar to what Chrome on Android
+     * would return.
+     *
+     * Example of WebView user agent string:
+     *   Mozilla/5.0 (Linux; Android 13; Pixel 7 Build/TQ3A.230901.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/116.0.0.0 Mobile Safari/537.36
+     *
+     * Example of Chrome on Android:
+     *   Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Mobile Safari/537.3
+     */
+    fun getInferredUserAgent(context: Context): String {
+        return WebView(context)
+            .getDefaultUserAgentString()
+            .replace("; Android .*?\\)".toRegex(), "; Android 10; K)")
+            .replace("Version/.* Chrome/".toRegex(), "Chrome/")
+    }
 
     fun supportsWebView(context: Context): Boolean {
         try {