Implement single selection logic in custom image picker

app/src/main/java/fr/free/nrw/commons/contributions/ContributionController.kt

@@ -253,13 +253,14 @@ class ContributionController @Inject constructor(@param:Named("default_preferenc
      */
     fun initiateCustomGalleryPickWithPermission(
         activity: Activity,
-        resultLauncher: ActivityResultLauncher<Intent>
+        resultLauncher: ActivityResultLauncher<Intent>,
+        singleSelection: Boolean = false
     ) {
         setPickerConfiguration(activity, true)
 
         checkPermissionsAndPerformAction(
             activity,
-            { openCustomSelector(activity, resultLauncher, 0) },
+            { FilePicker.openCustomSelector(activity, resultLauncher, 0, singleSelection) },
             R.string.storage_permission_title,
             R.string.write_storage_permission_rationale,
             *PERMISSIONS_STORAGE

app/src/main/java/fr/free/nrw/commons/customselector/ui/adapter/ImageAdapter.kt

@@ -327,12 +327,17 @@ class ImageAdapter(
 
         // Getting clicked index from all images index when show_already_actioned_images
         // switch is on
+        if (singleSelection) {
+            // If single selection mode, clear previous selection and select only the new one
+            if (selectedImages.isNotEmpty() && (selectedImages[0] != images[position])) {
+                val prevIndex = images.indexOf(selectedImages[0])
+                selectedImages.clear()
+                notifyItemChanged(prevIndex, ImageUnselected())
+            }
+        }
         val clickedIndex: Int =
             if (showAlreadyActionedImages) {
                 ImageHelper.getIndex(selectedImages, images[position])
-
-                // Getting clicked index from actionable images when show_already_actioned_images
-                // switch is off
             } else {
                 ImageHelper.getIndex(selectedImages, ArrayList(actionableImagesMap.values)[position])
             }
@@ -618,4 +623,13 @@ class ImageAdapter(
      * Returns the text for showing inside the bubble during bubble scroll.
      */
     override fun getSectionName(position: Int): String = images[position].date
+
+    private var singleSelection: Boolean = false
+
+    /**
+     * Set single selection mode
+     */
+    fun setSingleSelection(single: Boolean) {
+        singleSelection = single
+    }
 }

app/src/main/java/fr/free/nrw/commons/customselector/ui/selector/CustomSelectorActivity.kt

@@ -104,7 +104,7 @@ class CustomSelectorActivity :
     /**
      * Maximum number of images that can be selected.
      */
-    private val uploadLimit: Int = 20
+    private var uploadLimit: Int = 20
 
     /**
      * Flag that is marked true when the amount
@@ -207,6 +207,9 @@ class CustomSelectorActivity :
                 CustomSelectorViewModel::class.java,
             )
 
+        // Check for single selection extra
+        uploadLimit = if (intent.getBooleanExtra(EXTRA_SINGLE_SELECTION, false)) 1 else 20
+
         setupViews()
 
         if (prefs.getBoolean("customSelectorFirstLaunch", true)) {
@@ -728,6 +731,7 @@ class CustomSelectorActivity :
         const val FOLDER_ID: String = "FolderId"
         const val FOLDER_NAME: String = "FolderName"
         const val ITEM_ID: String = "ItemId"
+        const val EXTRA_SINGLE_SELECTION: String = "EXTRA_SINGLE_SELECTION"
     }
 }
 

app/src/main/java/fr/free/nrw/commons/customselector/ui/selector/ImageFragment.kt

@@ -212,6 +212,9 @@ class ImageFragment :
         _binding = FragmentCustomSelectorBinding.inflate(inflater, container, false)
         imageAdapter =
             ImageAdapter(requireActivity(), activity as ImageSelectListener, imageLoader!!)
+        // Set single selection mode if needed
+        val singleSelection = (activity as? CustomSelectorActivity)?.intent?.getBooleanExtra(CustomSelectorActivity.EXTRA_SINGLE_SELECTION, false) == true
+        imageAdapter.setSingleSelection(singleSelection)
         gridLayoutManager = GridLayoutManager(context, getSpanCount())
         with(binding?.selectorRv) {
             this?.layoutManager = gridLayoutManager

app/src/main/java/fr/free/nrw/commons/filepicker/FilePicker.kt

@@ -25,6 +25,9 @@ object FilePicker : Constants {
     private const val KEY_LAST_CAMERA_VIDEO = "last_video"
     private const val KEY_TYPE = "type"
 
+    // Add extra for single selection
+    private const val EXTRA_SINGLE_SELECTION = "EXTRA_SINGLE_SELECTION"
+
     /**
      * Returns the uri of the clicked image so that it can be put in MediaStore
      */
@@ -73,12 +76,17 @@ object FilePicker : Constants {
      * CreateCustomSectorIntent, creates intent for custom selector activity.
      * @param context
      * @param type
+     * @param singleSelection If true, restricts to single image selection
      * @return Custom selector intent
      */
     @JvmStatic
-    private fun createCustomSelectorIntent(context: Context, type: Int): Intent {
+    private fun createCustomSelectorIntent(context: Context, type: Int, singleSelection: Boolean = false): Intent {
         storeType(context, type)
-        return Intent(context, CustomSelectorActivity::class.java)
+        val intent = Intent(context, CustomSelectorActivity::class.java)
+        if (singleSelection) {
+            intent.putExtra(EXTRA_SINGLE_SELECTION, true)
+        }
+        return intent
     }
 
     @JvmStatic
@@ -153,9 +161,10 @@ object FilePicker : Constants {
     fun openCustomSelector(
         activity: Activity,
         resultLauncher: ActivityResultLauncher<Intent>,
-        type: Int
+        type: Int,
+        singleSelection: Boolean = false
     ) {
-        val intent = createCustomSelectorIntent(activity, type)
+        val intent = createCustomSelectorIntent(activity, type, singleSelection)
         resultLauncher.launch(intent)
     }
 

app/src/main/java/fr/free/nrw/commons/nearby/fragments/NearbyParentFragment.kt

@@ -974,7 +974,7 @@ class NearbyParentFragment : CommonsDaggerSupportFragment(),
             } else if (bottomSheetDetailsBehavior!!.state
                 == BottomSheetBehavior.STATE_EXPANDED
             ) {
-                bottomSheetDetailsBehavior!!.state = BottomSheetBehavior.STATE_COLLAPSED
+                bottomSheetDetailsBehavior!!.setState(BottomSheetBehavior.STATE_COLLAPSED)
             }
         }
 
@@ -2457,9 +2457,11 @@ class NearbyParentFragment : CommonsDaggerSupportFragment(),
                 Timber.d("Gallery button tapped. Place: %s", selectedPlace.toString())
                 storeSharedPrefs(selectedPlace!!)
                 activity?.let {
+                    // Pass singleSelection = true for Nearby flow
                     controller!!.initiateCustomGalleryPickWithPermission(
                         it,
-                        customSelectorLauncherForResult
+                        customSelectorLauncherForResult,
+                        singleSelection = true
                     )
                 }
             }