Add clear action for entities

collect_app/src/androidTest/java/org/odk/collect/android/feature/entitymanagement/DeleteEntitiesTest.kt

@@ -0,0 +1,33 @@
+package org.odk.collect.android.feature.entitymanagement
+
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.RuleChain
+import org.odk.collect.android.support.TestDependencies
+import org.odk.collect.android.support.pages.FormEntryPage
+import org.odk.collect.android.support.rules.CollectTestRule
+import org.odk.collect.android.support.rules.TestRuleChain
+import org.odk.collect.strings.R.string
+
+class DeleteEntitiesTest {
+
+    private val rule = CollectTestRule(useDemoProject = false)
+    private val testDependencies = TestDependencies()
+
+    @get:Rule
+    val ruleChain: RuleChain = TestRuleChain.chain(testDependencies)
+        .around(rule)
+
+    @Test
+    fun canClearAllEntities() {
+        testDependencies.server.addForm("one-question-entity-registration.xml")
+
+        rule.withMatchExactlyProject(testDependencies.server.url)
+            .startBlankForm("One Question Entity Registration")
+            .fillOutAndFinalize(FormEntryPage.QuestionAndAnswer("Name", "Logan Roy"))
+            .openEntityBrowser()
+            .clickOptionsIcon(string.clear_entities)
+            .clickOnString(string.clear_entities)
+            .assertTextDoesNotExist("people")
+    }
+}

collect_app/src/main/java/org/odk/collect/android/entities/JsonFileEntitiesRepository.kt

@@ -41,6 +41,11 @@ class JsonFileEntitiesRepository(directory: File) : EntitiesRepository {
         writeEntities(entities)
     }
 
+    override fun clear() {
+        StrictMode.noteSlowCall("Writing to JSON file")
+        entitiesFile.delete()
+    }
+
     private fun writeEntities(entities: MutableList<Entity>) {
         StrictMode.noteSlowCall("Writing to JSON file")
 

collect_app/src/test/java/org/odk/collect/android/entities/EntitiesRepositoryTest.kt

@@ -132,4 +132,19 @@ abstract class EntitiesRepositoryTest {
         assertThat(wines.size, equalTo(1))
         assertThat(wines[0].label, equalTo("Léoville Barton 2008"))
     }
+
+    @Test
+    fun `clear() deletes all entities`() {
+        val repository = buildSubject()
+
+        val wine = Entity("wines", "1", "Léoville Barton 2008")
+        val whisky = Entity("whiskys", "2", "Lagavulin 16")
+        repository.save(wine)
+        repository.save(whisky)
+
+        repository.clear()
+        assertThat(repository.getDatasets().size, equalTo(0))
+        assertThat(repository.getEntities("wines").size, equalTo(0))
+        assertThat(repository.getEntities("whiskys").size, equalTo(0))
+    }
 }

entities/src/main/AndroidManifest.xml

@@ -3,7 +3,8 @@
 
     <application>
         <activity
-            android:name=".EntityBrowserActivity" />
+            android:name=".EntityBrowserActivity"
+            android:theme="@style/Theme.Material3.DayNight"/>
     </application>
 
 </manifest>

entities/src/main/java/org/odk/collect/entities/DatasetsFragment.kt

@@ -2,8 +2,13 @@ package org.odk.collect.entities
 
 import android.os.Bundle
 import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.MenuHost
+import androidx.core.view.MenuProvider
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.ViewModelProvider
@@ -15,7 +20,7 @@ import androidx.recyclerview.widget.RecyclerView.ViewHolder
 import org.odk.collect.entities.databinding.DatasetItemLayoutBinding
 import org.odk.collect.entities.databinding.ListLayoutBinding
 
-class DatasetsFragment(private val viewModelFactory: ViewModelProvider.Factory) : Fragment() {
+class DatasetsFragment(private val viewModelFactory: ViewModelProvider.Factory, private val menuHost: MenuHost) : Fragment() {
 
     private val entitiesViewModel by viewModels<EntitiesViewModel> { viewModelFactory }
 
@@ -34,6 +39,19 @@ class DatasetsFragment(private val viewModelFactory: ViewModelProvider.Factory)
         entitiesViewModel.datasets.observe(viewLifecycleOwner) {
             binding.list.adapter = DatasetsAdapter(it, findNavController())
         }
+
+        menuHost.addMenuProvider(DatasetsMenuProvider(entitiesViewModel), viewLifecycleOwner)
+    }
+}
+
+private class DatasetsMenuProvider(private val entitiesViewModel: EntitiesViewModel) : MenuProvider {
+    override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) {
+        menuInflater.inflate(R.menu.datasets, menu)
+    }
+
+    override fun onMenuItemSelected(menuItem: MenuItem): Boolean {
+        entitiesViewModel.clearAll()
+        return true
     }
 }
 

entities/src/main/java/org/odk/collect/entities/EntitiesRepository.kt

@@ -4,4 +4,5 @@ interface EntitiesRepository {
     fun save(entity: Entity)
     fun getDatasets(): Set<String>
     fun getEntities(dataset: String): List<Entity>
+    fun clear()
 }

entities/src/main/java/org/odk/collect/entities/EntitiesViewModel.kt

@@ -27,4 +27,11 @@ class EntitiesViewModel(
 
         return result
     }
+
+    fun clearAll() {
+        scheduler.immediate(background = true) {
+            entitiesRepository.clear()
+            _datasets.postValue(entitiesRepository.getDatasets().toList())
+        }
+    }
 }

entities/src/main/java/org/odk/collect/entities/EntityBrowserActivity.kt

@@ -27,7 +27,7 @@ class EntityBrowserActivity : LocalizedActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         supportFragmentManager.fragmentFactory = FragmentFactoryBuilder()
-            .forClass(DatasetsFragment::class) { DatasetsFragment(viewModelFactory) }
+            .forClass(DatasetsFragment::class) { DatasetsFragment(viewModelFactory, this) }
             .forClass(EntitiesFragment::class) { EntitiesFragment(viewModelFactory) }
             .build()
 
@@ -44,5 +44,6 @@ class EntityBrowserActivity : LocalizedActivity() {
         val appBarConfiguration = AppBarConfiguration(navController.graph)
         val toolbar = findViewById<Toolbar>(org.odk.collect.androidshared.R.id.toolbar)
         toolbar.setupWithNavController(navController, appBarConfiguration)
+        setSupportActionBar(toolbar)
     }
 }

entities/src/main/java/org/odk/collect/entities/InMemEntitiesRepository.kt

@@ -12,6 +12,10 @@ class InMemEntitiesRepository : EntitiesRepository {
         return entities.filter { it.dataset == dataset }
     }
 
+    override fun clear() {
+        entities.clear()
+    }
+
     override fun save(entity: Entity) {
         val existing = entities.find { it.id == entity.id && it.dataset == entity.dataset }
 

entities/src/main/res/menu/datasets.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/clear_entities"
+        android:title="@string/clear_entities"
+        app:showAsAction="never" />
+</menu>

strings/src/main/res/values/strings.xml

@@ -1128,6 +1128,9 @@
     <!-- Text for button that leads to browser for the user to view and manage local entites -->
     <string name="entity_browser_button">View local entities</string>
 
+    <!-- Text for button that deletes all entities for the project -->
+    <string name="clear_entities">Clear all</string>
+
     <!--
     ##############################################
     # Crash handling