Move category deletion to dialog

app/src/main/java/io/timelimit/android/ui/manage/category/settings/CategorySettingsFragment.kt

@@ -66,8 +66,7 @@ class CategorySettingsFragment : Fragment() {
             }
         })
 
-        checkbox_delete_category.setOnCheckedChangeListener { _, isChecked -> btn_delete_category.isEnabled = isChecked }
-        btn_delete_category.setOnClickListener { doDeleteCategory() }
+        btn_delete_category.setOnClickListener { deleteCategory() }
 
         edit_category_title_go.setOnClickListener { doRenameCategory() }
         edit_category_title.setOnEditorActionListener { _, actionId, _ ->
@@ -126,9 +125,9 @@ class CategorySettingsFragment : Fragment() {
         }
     }
 
-    private fun doDeleteCategory() {
-        auth.tryDispatchParentAction(DeleteCategoryAction(
-                categoryId = params.categoryId
-        ))
+    private fun deleteCategory() {
+        if (auth.requestAuthenticationOrReturnTrue()) {
+            DeleteCategoryDialogFragment.newInstance(params).show(fragmentManager!!)
+        }
     }
 }

app/src/main/java/io/timelimit/android/ui/manage/category/settings/DeleteCategoryDialogFragment.kt

@@ -0,0 +1,73 @@
+package io.timelimit.android.ui.manage.category.settings
+
+import android.os.Bundle
+import android.view.View
+import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import io.timelimit.android.R
+import io.timelimit.android.data.model.Category
+import io.timelimit.android.data.model.UserType
+import io.timelimit.android.extensions.showSafe
+import io.timelimit.android.logic.AppLogic
+import io.timelimit.android.logic.DefaultAppLogic
+import io.timelimit.android.sync.actions.DeleteCategoryAction
+import io.timelimit.android.ui.main.ActivityViewModel
+import io.timelimit.android.ui.main.getActivityViewModel
+import io.timelimit.android.ui.manage.category.ManageCategoryFragmentArgs
+import io.timelimit.android.ui.util.ConfirmDeleteDialogFragment
+
+class DeleteCategoryDialogFragment: ConfirmDeleteDialogFragment() {
+    companion object {
+        private const val TAG = "DeleteCategoryDialogFragment"
+
+        fun newInstance(args: ManageCategoryFragmentArgs) = DeleteCategoryDialogFragment().apply {
+            arguments = args.toBundle()
+        }
+    }
+
+    private val params: ManageCategoryFragmentArgs by lazy { ManageCategoryFragmentArgs.fromBundle(arguments!!) }
+    private val appLogic: AppLogic by lazy { DefaultAppLogic.with(context!!) }
+    private val auth: ActivityViewModel by lazy { getActivityViewModel(activity!!) }
+
+    val categoryEntry: LiveData<Category?> by lazy {
+        appLogic.database.category().getCategoryByChildIdAndId(
+                categoryId = params.categoryId,
+                childId = params.childId
+        )
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        auth.authenticatedUser.observe(this, Observer {
+            if (it?.second?.type != UserType.Parent) {
+                dismissAllowingStateLoss()
+            }
+        })
+
+        categoryEntry.observe(this, Observer {
+            if (it == null) {
+                dismissAllowingStateLoss()
+            }
+        })
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        categoryEntry.observe(this, Observer {
+            binding.text = getString(R.string.category_settings_delete_dialog, it?.title)
+        })
+    }
+
+    override fun onConfirmDeletion() {
+        auth.tryDispatchParentAction(DeleteCategoryAction(
+                categoryId = params.categoryId
+        ))
+
+        dismiss()
+    }
+
+    fun show(fragmentManager: FragmentManager) = showSafe(fragmentManager, TAG)
+}

app/src/main/java/io/timelimit/android/ui/util/ConfirmDeleteDialogFragment.kt

@@ -0,0 +1,26 @@
+package io.timelimit.android.ui.util
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import io.timelimit.android.databinding.ConfirmDeleteDialogBinding
+
+abstract class ConfirmDeleteDialogFragment: BottomSheetDialogFragment(), ConfirmDeleteDialogFragmentHandlers {
+    lateinit var binding: ConfirmDeleteDialogBinding
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        binding = ConfirmDeleteDialogBinding.inflate(inflater, container, false)
+
+        binding.handlers = this
+
+        return binding.root
+    }
+
+    abstract override fun onConfirmDeletion()
+}
+
+interface ConfirmDeleteDialogFragmentHandlers {
+    fun onConfirmDeletion()
+}