From 16fe64ad0c6063956369374ca8e23b6a93f625ee Mon Sep 17 00:00:00 2001
From: Charles Lombardo <clombardo169@gmail.com>
Date: Sun, 11 Jun 2023 01:41:58 -0400
Subject: android: Use ContentResolver to get file extension

Fixes an issue where we try to resolve file extension from URIs. Sometimes the URI will not contain the file name at all and instead a string of numbers. Here we query the content resolver and guarantee that we get a file name every time.
---
 .../java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt |  8 ++++----
 .../main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt  | 24 ++++++++++++++++++++--
 src/android/app/src/main/res/values/strings.xml    |  7 ++-----
 3 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
index 124f62f08..3fca0a7e6 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/ui/main/MainActivity.kt
@@ -284,10 +284,10 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
             if (result == null)
                 return@registerForActivityResult
 
-            if (!FileUtil.hasExtension(result.toString(), "keys")) {
+            if (!FileUtil.hasExtension(result, "keys")) {
                 MessageDialogFragment.newInstance(
                     R.string.reading_keys_failure,
-                    R.string.install_keys_failure_extension_description
+                    R.string.install_prod_keys_failure_extension_description
                 ).show(supportFragmentManager, MessageDialogFragment.TAG)
                 return@registerForActivityResult
             }
@@ -379,10 +379,10 @@ class MainActivity : AppCompatActivity(), ThemeProvider {
             if (result == null)
                 return@registerForActivityResult
 
-            if (!FileUtil.hasExtension(result.toString(), "bin")) {
+            if (!FileUtil.hasExtension(result, "bin")) {
                 MessageDialogFragment.newInstance(
                     R.string.reading_keys_failure,
-                    R.string.install_keys_failure_extension_description
+                    R.string.install_amiibo_keys_failure_extension_description
                 ).show(supportFragmentManager, MessageDialogFragment.TAG)
                 return@registerForActivityResult
             }
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt
index 593dad8d3..492b1ad91 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/FileUtil.kt
@@ -7,7 +7,9 @@ import android.content.Context
 import android.database.Cursor
 import android.net.Uri
 import android.provider.DocumentsContract
+import android.provider.OpenableColumns
 import androidx.documentfile.provider.DocumentFile
+import org.yuzu.yuzu_emu.YuzuApplication
 import org.yuzu.yuzu_emu.model.MinimalDocumentFile
 import java.io.BufferedInputStream
 import java.io.File
@@ -324,7 +326,25 @@ object FileUtil {
         }
     }
 
-    fun hasExtension(path: String, extension: String): Boolean {
-        return path.substring(path.lastIndexOf(".") + 1).contains(extension)
+    fun hasExtension(path: String, extension: String): Boolean =
+        path.substring(path.lastIndexOf(".") + 1).contains(extension)
+
+    fun hasExtension(uri: Uri, extension: String): Boolean {
+        val fileName: String?
+        val cursor = YuzuApplication.appContext.contentResolver.query(uri, null, null, null, null)
+        val nameIndex = cursor?.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+        cursor?.moveToFirst()
+
+        if (nameIndex == null) {
+            return false
+        }
+
+        fileName = cursor.getString(nameIndex)
+        cursor.close()
+
+        if (fileName == null) {
+            return false
+        }
+        return fileName.substring(fileName.lastIndexOf(".") + 1).contains(extension)
     }
 }
diff --git a/src/android/app/src/main/res/values/strings.xml b/src/android/app/src/main/res/values/strings.xml
index 0ae69afb4..6e9d47557 100644
--- a/src/android/app/src/main/res/values/strings.xml
+++ b/src/android/app/src/main/res/values/strings.xml
@@ -65,11 +65,8 @@
     <string name="invalid_keys_file">Invalid keys file selected</string>
     <string name="install_keys_success">Keys successfully installed</string>
     <string name="reading_keys_failure">Error reading encryption keys</string>
-    <string name="install_keys_failure_extension_description">
-        1. Verify your keys have the .keys extension.\n\n
-        2. Keys must not be stored in the Downloads folder.\n\n
-        Resolve the issue(s) and try again.
-    </string>
+    <string name="install_prod_keys_failure_extension_description">Verify your keys file has a .keys extension and try again.</string>
+    <string name="install_amiibo_keys_failure_extension_description">Verify your keys file has a .bin extension and try again.</string>
     <string name="invalid_keys_error">Invalid encryption keys</string>
     <string name="dumping_keys_quickstart_link">https://yuzu-emu.org/help/quickstart/#dumping-decryption-keys</string>
     <string name="install_keys_failure_description">The selected file is incorrect or corrupt. Please redump your keys.</string>
-- 
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