Convert BasePresenter to kotlin

app/src/main/java/fr/free/nrw/commons/BasePresenter.java

@@ -1,18 +0,0 @@
-package fr.free.nrw.commons;
-
-import androidx.annotation.NonNull;
-
-/**
- * Base presenter, enforcing contracts to atach and detach view
- */
-public interface BasePresenter<T> {
-    /**
-     * Until a view is attached, it is open to listen events from the presenter
-     */
-    void onAttachView(@NonNull T view);
-
-    /**
-     * Detaching a view makes sure that the view no more receives events from the presenter
-     */
-    void onDetachView();
-}

app/src/main/java/fr/free/nrw/commons/BasePresenter.kt

@@ -0,0 +1,10 @@
+package fr.free.nrw.commons
+
+/**
+ * Base presenter, enforcing contracts to attach and detach view
+ */
+interface BasePresenter<T> {
+    fun onAttachView(view: T)
+
+    fun onDetachView()
+}

app/src/main/java/fr/free/nrw/commons/campaigns/CampaignsPresenter.kt

@@ -26,7 +26,7 @@ class CampaignsPresenter @Inject constructor(
     private val okHttpJsonApiClient: OkHttpJsonApiClient?,
     @param:Named(IO_THREAD) private val ioScheduler: Scheduler,
     @param:Named(MAIN_THREAD) private val mainThreadScheduler: Scheduler
-) : BasePresenter<ICampaignsView?> {
+) : BasePresenter<ICampaignsView> {
     private var view: ICampaignsView? = null
     private var disposable: Disposable? = null
     private var campaign: Campaign? = null

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

@@ -15,7 +15,7 @@ class ContributionsListContract {
         fun showNoContributionsUI(shouldShow: Boolean)
     }
 
-    interface UserActionListener : BasePresenter<View?> {
+    interface UserActionListener : BasePresenter<View> {
         fun refreshList(swipeRefreshLayout: SwipeRefreshLayout?)
     }
 }

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

@@ -54,7 +54,7 @@ interface UploadMediaDetailsContract {
         fun showBadImagePopup(errorCode: Int, index: Int, uploadItem: UploadItem)
     }
 
-    interface UserActionListener : BasePresenter<View?> {
+    interface UserActionListener : BasePresenter<View> {
         fun setupBasicKvStoreFactory(factory: (String) -> BasicKvStore)
 
         fun receiveImage(