Add delete button to edit filter activity. (#3553)

Adds workaround for #3545

app/src/main/java/com/keylesspalace/tusky/components/filters/EditFilterActivity.kt

@@ -11,6 +11,7 @@ import androidx.core.content.IntentCompat
 import androidx.core.view.size
 import androidx.core.widget.doAfterTextChanged
 import androidx.lifecycle.lifecycleScope
+import at.connyduck.calladapter.networkresult.fold
 import com.google.android.material.chip.Chip
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.switchmaterial.SwitchMaterial
@@ -24,7 +25,9 @@ import com.keylesspalace.tusky.entity.Filter
 import com.keylesspalace.tusky.entity.FilterKeyword
 import com.keylesspalace.tusky.network.MastodonApi
 import com.keylesspalace.tusky.util.viewBinding
+import com.keylesspalace.tusky.util.visible
 import kotlinx.coroutines.launch
+import retrofit2.HttpException
 import java.util.Date
 import javax.inject.Inject
 
@@ -78,6 +81,9 @@ class EditFilterActivity : BaseActivity() {
 
         binding.actionChip.setOnClickListener { showAddKeywordDialog() }
         binding.filterSaveButton.setOnClickListener { saveChanges() }
+        binding.filterDeleteButton.setOnClickListener { deleteFilter() }
+        binding.filterDeleteButton.visible(originalFilter != null)
+
         for (switch in contextSwitches.keys) {
             switch.setOnCheckedChangeListener { _, isChecked ->
                 val context = contextSwitches[switch]!!
@@ -259,6 +265,32 @@ class EditFilterActivity : BaseActivity() {
         }
     }
 
+    private fun deleteFilter() {
+        originalFilter?.let { filter ->
+            lifecycleScope.launch {
+                api.deleteFilter(filter.id).fold(
+                    {
+                        finish()
+                    },
+                    { throwable ->
+                        if (throwable is HttpException && throwable.code() == 404) {
+                            api.deleteFilterV1(filter.id).fold(
+                                {
+                                    finish()
+                                },
+                                {
+                                    Snackbar.make(binding.root, "Error deleting filter '${filter.title}'", Snackbar.LENGTH_SHORT).show()
+                                }
+                            )
+                        } else {
+                            Snackbar.make(binding.root, "Error deleting filter '${filter.title}'", Snackbar.LENGTH_SHORT).show()
+                        }
+                    }
+                )
+            }
+        }
+    }
+
     companion object {
         const val FILTER_TO_EDIT = "FilterToEdit"
 

app/src/main/res/layout/activity_edit_filter.xml

@@ -144,14 +144,30 @@
                 android:minHeight="48dp"
                 android:text="@string/pref_title_account_filter_keywords" />
 
-            <Button
+            <LinearLayout
-                android:id="@+id/filter_save_button"
+                android:layout_width="match_parent"
-                android:layout_width="wrap_content"
-                android:layout_gravity="end"
                 android:layout_height="wrap_content"
-                android:padding="6dp"
+                android:paddingStart="?android:attr/listPreferredItemPaddingStart"
-                android:layout_marginBottom="16dp"
+                android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
-                android:text="@string/action_save" />
+                android:gravity="end"
+                style="?android:attr/buttonBarStyle">
+
+                <Button
+                    android:id="@+id/filter_delete_button"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/action_delete"
+                    style="?android:attr/buttonBarButtonStyle" />
+
+                <Button
+                    android:id="@+id/filter_save_button"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:text="@string/action_save"
+                    style="?android:attr/buttonBarButtonStyle" />
+            </LinearLayout>
+
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 </androidx.coordinatorlayout.widget.CoordinatorLayout>