8 files changed, 165 insertions, 4 deletions

diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt
index 1c9fb0675..c408485c6 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt
@@ -23,6 +23,7 @@ import org.yuzu.yuzu_emu.utils.Log
 import org.yuzu.yuzu_emu.utils.SerializableHelper.serializable
 import org.yuzu.yuzu_emu.model.InstallResult
 import org.yuzu.yuzu_emu.model.Patch
+import org.yuzu.yuzu_emu.model.GameVerificationResult
 
 /**
  * Class which contains methods that interact
@@ -565,6 +566,26 @@ object NativeLibrary {
     external fun removeMod(programId: String, name: String)
 
     /**
+     * Verifies all installed content
+     * @param callback UI callback for verification progress. Return true in the callback to cancel.
+     * @return Array of content that failed verification. Successful if empty.
+     */
+    external fun verifyInstalledContents(
+        callback: (max: Long, progress: Long) -> Boolean
+    ): Array<String>
+
+    /**
+     * Verifies the contents of a game
+     * @param path String path to a game
+     * @param callback UI callback for verification progress. Return true in the callback to cancel.
+     * @return Int that is meant to be converted to a [GameVerificationResult]
+     */
+    external fun verifyGameContents(
+        path: String,
+        callback: (max: Long, progress: Long) -> Boolean
+    ): Int
+
+    /**
      * Gets the save location for a specific game
      *
      * @param programId String representation of a game's program ID
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/GameInfoFragment.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/GameInfoFragment.kt
index fa2a4c9f9..5aa3f453f 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/GameInfoFragment.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/GameInfoFragment.kt
@@ -21,8 +21,10 @@ import androidx.fragment.app.activityViewModels
 import androidx.navigation.findNavController
 import androidx.navigation.fragment.navArgs
 import com.google.android.material.transition.MaterialSharedAxis
+import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.R
 import org.yuzu.yuzu_emu.databinding.FragmentGameInfoBinding
+import org.yuzu.yuzu_emu.model.GameVerificationResult
 import org.yuzu.yuzu_emu.model.HomeViewModel
 import org.yuzu.yuzu_emu.utils.GameMetadata
 
@@ -101,6 +103,38 @@ class GameInfoFragment : Fragment() {
                 """.trimIndent()
                 copyToClipboard(args.game.title, details)
             }
+
+            buttonVerifyIntegrity.setOnClickListener {
+                ProgressDialogFragment.newInstance(
+                    requireActivity(),
+                    R.string.verifying,
+                    true
+                ) { progressCallback, _ ->
+                    val result = GameVerificationResult.from(
+                        NativeLibrary.verifyGameContents(
+                            args.game.path,
+                            progressCallback
+                        )
+                    )
+                    return@newInstance when (result) {
+                        GameVerificationResult.Success ->
+                            MessageDialogFragment.newInstance(
+                                titleId = R.string.verify_success,
+                                descriptionId = R.string.operation_completed_successfully
+                            )
+                        GameVerificationResult.Failed ->
+                            MessageDialogFragment.newInstance(
+                                titleId = R.string.verify_failure,
+                                descriptionId = R.string.verify_failure_description
+                            )
+                        GameVerificationResult.NotImplemented ->
+                            MessageDialogFragment.newInstance(
+                                titleId = R.string.verify_no_result,
+                                descriptionId = R.string.verify_no_result_description
+                            )
+                    }
+                }.show(parentFragmentManager, ProgressDialogFragment.TAG)
+            }
         }
 
         setInsets()
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/HomeSettingsFragment.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/HomeSettingsFragment.kt
index 6ddd758e6..aefae2938 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/HomeSettingsFragment.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/HomeSettingsFragment.kt
@@ -32,6 +32,7 @@ import org.yuzu.yuzu_emu.BuildConfig
 import org.yuzu.yuzu_emu.HomeNavigationDirections
 import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.R
+import org.yuzu.yuzu_emu.YuzuApplication
 import org.yuzu.yuzu_emu.adapters.HomeSettingAdapter
 import org.yuzu.yuzu_emu.databinding.FragmentHomeSettingsBinding
 import org.yuzu.yuzu_emu.features.DocumentProvider
@@ -142,6 +143,38 @@ class HomeSettingsFragment : Fragment() {
             )
             add(
                 HomeSetting(
+                    R.string.verify_installed_content,
+                    R.string.verify_installed_content_description,
+                    R.drawable.ic_check_circle,
+                    {
+                        ProgressDialogFragment.newInstance(
+                            requireActivity(),
+                            titleId = R.string.verifying,
+                            cancellable = true
+                        ) { progressCallback, _ ->
+                            val result = NativeLibrary.verifyInstalledContents(progressCallback)
+                            return@newInstance if (result.isEmpty()) {
+                                MessageDialogFragment.newInstance(
+                                    titleId = R.string.verify_success,
+                                    descriptionId = R.string.operation_completed_successfully
+                                )
+                            } else {
+                                val failedNames = result.joinToString("\n")
+                                val errorMessage = YuzuApplication.appContext.getString(
+                                    R.string.verification_failed_for,
+                                    failedNames
+                                )
+                                MessageDialogFragment.newInstance(
+                                    titleId = R.string.verify_failure,
+                                    descriptionString = errorMessage
+                                )
+                            }
+                        }.show(parentFragmentManager, ProgressDialogFragment.TAG)
+                    }
+                )
+            )
+            add(
+                HomeSetting(
                     R.string.share_log,
                     R.string.share_log_description,
                     R.drawable.ic_log,
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/MessageDialogFragment.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/MessageDialogFragment.kt
index 32062b6fe..620d8db7c 100644
--- a/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/MessageDialogFragment.kt
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/MessageDialogFragment.kt
@@ -69,7 +69,7 @@ class MessageDialogFragment : DialogFragment() {
         private const val HELP_LINK = "Link"
 
         fun newInstance(
-            activity: FragmentActivity,
+            activity: FragmentActivity? = null,
             titleId: Int = 0,
             titleString: String = "",
             descriptionId: Int = 0,
@@ -86,9 +86,11 @@ class MessageDialogFragment : DialogFragment() {
                 putString(DESCRIPTION_STRING, descriptionString)
                 putInt(HELP_LINK, helpLinkId)
             }
-            ViewModelProvider(activity)[MessageDialogViewModel::class.java].apply {
-                clear()
-                this.positiveAction = positiveAction
+            if (activity != null) {
+                ViewModelProvider(activity)[MessageDialogViewModel::class.java].apply {
+                    clear()
+                    this.positiveAction = positiveAction
+                }
             }
             dialog.arguments = bundle
             return dialog
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/model/GameVerificationResult.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/model/GameVerificationResult.kt
new file mode 100644
index 000000000..804637fb8
--- /dev/null
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/model/GameVerificationResult.kt
@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.yuzu.yuzu_emu.model
+
+enum class GameVerificationResult(val int: Int) {
+    Success(0),
+    Failed(1),
+    NotImplemented(2);
+
+    companion object {
+        fun from(int: Int): GameVerificationResult =
+            entries.firstOrNull { it.int == int } ?: Success
+    }
+}
diff --git a/src/android/app/src/main/jni/native.cpp b/src/android/app/src/main/jni/native.cpp
index be0a723b1..963f57380 100644
--- a/src/android/app/src/main/jni/native.cpp
+++ b/src/android/app/src/main/jni/native.cpp
@@ -829,6 +829,43 @@ void Java_org_yuzu_yuzu_1emu_NativeLibrary_removeMod(JNIEnv* env, jobject jobj,
                               program_id, GetJString(env, jname));
 }
 
+jobject Java_org_yuzu_yuzu_1emu_NativeLibrary_verifyInstalledContents(JNIEnv* env, jobject jobj,
+                                                                      jobject jcallback) {
+    auto jlambdaClass = env->GetObjectClass(jcallback);
+    auto jlambdaInvokeMethod = env->GetMethodID(
+        jlambdaClass, "invoke", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
+    const auto callback = [env, jcallback, jlambdaInvokeMethod](size_t max, size_t progress) {
+        auto jwasCancelled = env->CallObjectMethod(jcallback, jlambdaInvokeMethod,
+                                                   ToJDouble(env, max), ToJDouble(env, progress));
+        return GetJBoolean(env, jwasCancelled);
+    };
+
+    auto& session = EmulationSession::GetInstance();
+    std::vector<std::string> result = ContentManager::VerifyInstalledContents(
+        &session.System(), session.GetContentProvider(), callback);
+    jobjectArray jresult =
+        env->NewObjectArray(result.size(), IDCache::GetStringClass(), ToJString(env, ""));
+    for (size_t i = 0; i < result.size(); ++i) {
+        env->SetObjectArrayElement(jresult, i, ToJString(env, result[i]));
+    }
+    return jresult;
+}
+
+jint Java_org_yuzu_yuzu_1emu_NativeLibrary_verifyGameContents(JNIEnv* env, jobject jobj,
+                                                              jstring jpath, jobject jcallback) {
+    auto jlambdaClass = env->GetObjectClass(jcallback);
+    auto jlambdaInvokeMethod = env->GetMethodID(
+        jlambdaClass, "invoke", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
+    const auto callback = [env, jcallback, jlambdaInvokeMethod](size_t max, size_t progress) {
+        auto jwasCancelled = env->CallObjectMethod(jcallback, jlambdaInvokeMethod,
+                                                   ToJDouble(env, max), ToJDouble(env, progress));
+        return GetJBoolean(env, jwasCancelled);
+    };
+    auto& session = EmulationSession::GetInstance();
+    return static_cast<jint>(
+        ContentManager::VerifyGameContents(&session.System(), GetJString(env, jpath), callback));
+}
+
 jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getSavePath(JNIEnv* env, jobject jobj,
                                                           jstring jprogramId) {
     auto program_id = EmulationSession::GetProgramId(env, jprogramId);
diff --git a/src/android/app/src/main/res/layout/fragment_game_info.xml b/src/android/app/src/main/res/layout/fragment_game_info.xml
index 80ede8a8c..53af15787 100644
--- a/src/android/app/src/main/res/layout/fragment_game_info.xml
+++ b/src/android/app/src/main/res/layout/fragment_game_info.xml
@@ -118,6 +118,14 @@
                 android:layout_marginTop="16dp"
                 android:text="@string/copy_details" />
 
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/button_verify_integrity"
+                style="@style/Widget.Material3.Button"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:text="@string/verify_integrity" />
+
         </LinearLayout>
 
     </androidx.core.widget.NestedScrollView>
diff --git a/src/android/app/src/main/res/values/strings.xml b/src/android/app/src/main/res/values/strings.xml
index bfcbb5812..eefcc3ff4 100644
--- a/src/android/app/src/main/res/values/strings.xml
+++ b/src/android/app/src/main/res/values/strings.xml
@@ -142,6 +142,8 @@
         <item quantity="other">Successfully imported %d saves</item>
     </plurals>
     <string name="no_save_data_found">No save data found</string>
+    <string name="verify_installed_content">Verify installed content</string>
+    <string name="verify_installed_content_description">Checks all installed content for corruption</string>
 
     <!-- Applet launcher strings -->
     <string name="applets">Applet launcher</string>
@@ -288,6 +290,7 @@
     <string name="import_complete">Import complete</string>
     <string name="more_options">More options</string>
     <string name="use_global_setting">Use global setting</string>
+    <string name="operation_completed_successfully">The operation completed successfully</string>
 
     <!-- GPU driver installation -->
     <string name="select_gpu_driver">Select GPU driver</string>
@@ -352,6 +355,14 @@
     <string name="content_install_notice_description">The content that you selected does not match this game.\nInstall anyway?</string>
     <string name="confirm_uninstall">Confirm uninstall</string>
     <string name="confirm_uninstall_description">Are you sure you want to uninstall this addon?</string>
+    <string name="verify_integrity">Verify integrity</string>
+    <string name="verifying">Verifying…</string>
+    <string name="verify_success">Integrity verification succeeded!</string>
+    <string name="verify_failure">Integrity verification failed!</string>
+    <string name="verify_failure_description">File contents may be corrupt</string>
+    <string name="verify_no_result">Integrity verification couldn\'t be performed</string>
+    <string name="verify_no_result_description">File contents were not checked for validity</string>
+    <string name="verification_failed_for">Verification failed for the following files:\n%1$s</string>
 
     <!-- ROM loading errors -->
     <string name="loader_error_encrypted">Your ROM is encrypted</string>