FileDetailsSharingProcess: force recreation of date picked on config changes

See added comment for details

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

app/src/main/java/com/owncloud/android/ui/fragment/FileDetailsSharingProcessFragment.kt

@@ -22,11 +22,13 @@
 package com.owncloud.android.ui.fragment
 
 import android.content.Context
+import android.content.res.Configuration
 import android.os.Bundle
 import android.text.TextUtils
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
 import com.owncloud.android.R
 import com.owncloud.android.databinding.FileDetailsSharingProcessFragmentBinding
@@ -116,6 +118,8 @@ class FileDetailsSharingProcessFragment : Fragment(), ExpirationDatePickerDialog
     private var isReshareShown: Boolean = true // show or hide reshare option
     private var isExpDateShown: Boolean = true // show or hide expiry date option
 
+    private var datePickerFragment: DialogFragment? = null
+
     override fun onAttach(context: Context) {
         super.onAttach(context)
         try {
@@ -160,6 +164,18 @@ class FileDetailsSharingProcessFragment : Fragment(), ExpirationDatePickerDialog
         implementClickEvents()
     }
 
+    override fun onConfigurationChanged(newConfig: Configuration) {
+        super.onConfigurationChanged(newConfig)
+        // Force recreation of dialog fragment when screen rotates
+        // This is needed because the calendar layout should be different in portrait and landscape,
+        // but as FDA persists through config changes, the dialog is not recreated automatically
+        val datePicker = datePickerFragment
+        if (datePicker?.dialog?.isShowing == true) {
+            datePicker.dismiss()
+            showExpirationDateDialog()
+        }
+    }
+
     private fun showShareProcessFirst() {
         binding.shareProcessGroupOne.visibility = View.VISIBLE
         binding.shareProcessEditShareLink.visibility = View.VISIBLE
@@ -350,9 +366,10 @@ class FileDetailsSharingProcessFragment : Fragment(), ExpirationDatePickerDialog
     private fun showExpirationDateDialog() {
         val dialog = ExpirationDatePickerDialogFragment.newInstance(chosenExpDateInMills)
         dialog.setOnExpiryDateListener(this)
-        fileActivity?.let { it1 ->
+        datePickerFragment = dialog
+        fileActivity?.let {
             dialog.show(
-                it1.supportFragmentManager,
+                it.supportFragmentManager,
                 ExpirationDatePickerDialogFragment.DATE_PICKER_DIALOG
             )
         }