Suggest to correct if the caption's language is set to non-"fr" default language while the caption is actually in French

app/build.gradle.kts

@@ -175,6 +175,7 @@ android {
     }
     kotlinOptions {
         jvmTarget = "17"
+        freeCompilerArgs += "-Xskip-metadata-version-check"
     }
     buildFeatures {
         buildConfig = true
@@ -363,6 +364,8 @@ dependencies {
 
     //OSMDroid
     implementation(libs.osmdroid.android)
+    implementation("com.google.mlkit:genai-prompt:1.0.0-alpha1")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.4.0")
     constraints {
         implementation(libs.kotlin.stdlib.jdk7) {
             because("kotlin-stdlib-jdk7 is now a part of kotlin-stdlib")

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools">
 
+  <uses-sdk tools:overrideLibrary="com.google.mlkit.genai.prompt, com.google.mlkit.genai.common, com.google.android.gms.basement, com.google.android.gms:play-services-basement, com.google.android.gms.common" />
+
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
     android:maxSdkVersion="32" />

app/src/main/java/fr/free/nrw/commons/upload/UploadActivity.kt

@@ -23,6 +23,7 @@ import androidx.fragment.app.FragmentStatePagerAdapter
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.viewpager.widget.ViewPager.OnPageChangeListener
 import androidx.work.ExistingWorkPolicy
+import androidx.lifecycle.lifecycleScope
 import fr.free.nrw.commons.R
 import fr.free.nrw.commons.auth.LoginActivity
 import fr.free.nrw.commons.auth.SessionManager
@@ -52,13 +53,18 @@ import fr.free.nrw.commons.utils.DialogUtil.showAlertDialog
 import fr.free.nrw.commons.utils.PermissionUtils.PERMISSIONS_STORAGE
 import fr.free.nrw.commons.utils.PermissionUtils.checkPermissionsAndPerformAction
 import fr.free.nrw.commons.utils.PermissionUtils.hasPartialAccess
+import com.google.mlkit.genai.prompt.GenerativeModel
+import com.google.mlkit.genai.prompt.Generation
+import com.google.mlkit.genai.prompt.TextPart
+import com.google.mlkit.genai.prompt.generateContentRequest
 import fr.free.nrw.commons.utils.PermissionUtils.hasPermission
 import fr.free.nrw.commons.utils.ViewUtil.showLongToast
 import fr.free.nrw.commons.wikidata.WikidataConstants.PLACE_OBJECT
 import fr.free.nrw.commons.wikidata.WikidataConstants.SELECTED_NEARBY_PLACE
 import fr.free.nrw.commons.wikidata.WikidataConstants.SELECTED_NEARBY_PLACE_CATEGORY
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
+import kotlinx.coroutines.launch
 import timber.log.Timber
 import java.io.File
 import javax.inject.Inject
@@ -91,6 +97,7 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
     @Inject
     var locationManager: LocationServiceManager? = null
 
+    private var model: GenerativeModel? = null
     private var isTitleExpanded = true
 
     private var progressDialog: ProgressDialog? = null
@@ -231,6 +238,9 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
             clearAll()
         }
         checkStoragePermissions()
+        if (VERSION.SDK_INT >= VERSION_CODES.O) {
+            model = Generation.getClient()
+        }
     }
 
     private fun init() {
@@ -804,6 +814,54 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
     }
 
     override fun onNextButtonClicked(index: Int) {
+        val currentFragment = fragments!![index]
+        if (currentFragment is UploadMediaDetailFragment) {
+            if (VERSION.SDK_INT >= VERSION_CODES.O) {
+                val adapter = (currentFragment as UploadMediaDetailFragment).uploadMediaDetailAdapter
+                val uploadMediaDetail = adapter.items[0]
+                val languagesAdapter =
+                    fr.free.nrw.commons.upload.LanguagesAdapter(this, mutableMapOf())
+                val defaultLocaleIndex = languagesAdapter.getIndexOfUserDefaultLocale(this)
+                val defaultLanguageCode = languagesAdapter.getLanguageCode(defaultLocaleIndex)
+
+                if (adapter.items.size == 1
+                    && uploadMediaDetail.languageCode == defaultLanguageCode
+                    && uploadMediaDetail.languageCode != "fr"
+                ) {
+                    showProgress(true)
+                    isCaptionFrench(uploadMediaDetail.captionText) { isFrench ->
+                        showProgress(false)
+                        if (isFrench) {
+                            showAlertDialog(
+                                this,
+                                getString(R.string.french_caption_title),
+                                getString(R.string.french_caption_check),
+                                getString(R.string.yes),
+                                getString(R.string.no),
+                                {
+                                    adapter.setFirstCaptionLanguageToFrench()
+                                    proceedToNextStep(index)
+                                },
+                                {
+                                    proceedToNextStep(index)
+                                }
+                            )
+                        } else {
+                            proceedToNextStep(index)
+                        }
+                    }
+                } else {
+                    proceedToNextStep(index)
+                }
+            } else {
+                proceedToNextStep(index)
+            }
+        } else {
+            proceedToNextStep(index)
+        }
+    }
+
+    private fun proceedToNextStep(index: Int) {
         if (index < fragments!!.size - 1) {
             // Hide the keyboard before navigating to Media License screen
             val isUploadCategoriesFragment = fragments!!.getOrNull(index)?.let {
@@ -831,6 +889,26 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
         }
     }
 
+    private fun isCaptionFrench(caption: String, callback: (Boolean) -> Unit) {
+        lifecycleScope.launch {
+            try {
+                val prompt = "Output FR if the following expression is in French: $caption"
+                Timber.tag("LanguageDetection").d("Prompt: %s", prompt)
+                val genRequest = generateContentRequest(
+                    TextPart(prompt)
+                ) {
+                    temperature = 0f
+                }
+                val response = model!!.generateContent(genRequest)
+                Timber.tag("LanguageDetection").d("Response: %s", response.candidates.first().text)
+                callback(response.candidates.first().text.toString().trim() == "FR")
+            } catch (e: Exception) {
+                Timber.e(e, "Error detecting language")
+                callback(false)
+            }
+        }
+    }
+
     override fun onPreviousButtonClicked(index: Int) {
         if (index != 0) {
             binding.vpUpload.setCurrentItem(index - 1, true)
@@ -897,6 +975,9 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
             uploadCategoriesFragment!!.callback = null
         }
         onBackPressedCallback.remove()
+        if (VERSION.SDK_INT >= VERSION_CODES.O) {
+            model?.close()
+        }
     }
 
     /**

app/src/main/java/fr/free/nrw/commons/upload/UploadMediaDetailAdapter.kt

@@ -182,6 +182,13 @@ class UploadMediaDetailAdapter : RecyclerView.Adapter<UploadMediaDetailAdapter.V
         updateAddButtonVisibility()
     }
 
+    fun setFirstCaptionLanguageToFrench() {
+        if (uploadMediaDetails.size == 1) {
+            uploadMediaDetails[0].languageCode = "fr"
+            notifyItemChanged(0)
+        }
+    }
+
     inner class ViewHolder(val binding: RowItemDescriptionBinding) :
         RecyclerView.ViewHolder(binding.root) {
 

app/src/main/java/fr/free/nrw/commons/upload/mediaDetails/UploadMediaDetailFragment.kt

@@ -121,7 +121,7 @@ class UploadMediaDetailFragment : UploadBaseFragment(), UploadMediaDetailsContra
     private val keyForShowingAlertDialog = "isNoNetworkAlertDialogShowing"
     internal var uploadableFile: UploadableFile? = null
     internal var place: Place? = null
-    private lateinit var uploadMediaDetailAdapter: UploadMediaDetailAdapter
+    lateinit var uploadMediaDetailAdapter: UploadMediaDetailAdapter
     var indexOfFragment = 0
     var isExpanded = true
     var fragmentCallback: UploadMediaDetailFragmentCallback? = null

app/src/main/res/values/strings.xml

@@ -887,4 +887,6 @@ Upload your first media by tapping on the add button.</string>
   <string name="image_tag_line_created_and_uploaded_by">Created and uploaded by: %1$s</string>
   <string name="image_tag_line_created_by_and_uploaded_by">Created by %1$s and uploaded by %2$s</string>
   <string name="nominated_for_deletion_btn">Nominated for Deletion</string>
+  <string name="french_caption_check">Is this caption in language \"fr\"?</string>
+  <string name="french_caption_title">French caption</string>
 </resources>

app/src/test/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-sdk tools:overrideLibrary="com.google.mlkit.genai.prompt, com.google.mlkit.genai.common, com.google.android.gms.basement, com.google.android.gms:play-services-basement, com.google.android.gms.common" />
+</manifest>