Migrate EmojiPickerPresenter to assisted-factory pattern with EmptyGetRecentEmojis

libraries/emoji/api/build.gradle.kts

@@ -18,5 +18,5 @@ dependencies {
     implementation(projects.libraries.matrix.api)
 
     implementation(libs.kotlinx.collections.immutable)
-    implementation(libs.matrix.emojibase.bindings)
+    api(libs.matrix.emojibase.bindings)
 }

libraries/emoji/api/src/main/kotlin/io/element/android/libraries/emoji/api/picker/EmojiPickerPresenter.kt

@@ -8,5 +8,10 @@
 package io.element.android.libraries.emoji.api.picker
 
 import io.element.android.libraries.architecture.Presenter
+import io.element.android.libraries.emoji.api.recentemojis.GetRecentEmojis
 
-fun interface EmojiPickerPresenter : Presenter<EmojiPickerState>
+fun interface EmojiPickerPresenter : Presenter<EmojiPickerState> {
+    fun interface Factory {
+        fun create(getRecentEmojis: GetRecentEmojis): EmojiPickerPresenter
+    }
+}

libraries/emoji/api/src/main/kotlin/io/element/android/libraries/emoji/api/recentemojis/GetRecentEmojis.kt

@@ -9,6 +9,7 @@
 package io.element.android.libraries.emoji.api.recentemojis
 
 import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
 
 /**
  * Returns the list of recently used emojis for reactions.
@@ -16,3 +17,11 @@ import kotlinx.collections.immutable.ImmutableList
 fun interface GetRecentEmojis {
     suspend operator fun invoke(): Result<ImmutableList<String>>
 }
+
+/**
+ * A [GetRecentEmojis] that never returns any recent emojis. Handy for pickers that don't want
+ * a "Recent" tab (e.g. the user-status picker).
+ */
+object EmptyGetRecentEmojis : GetRecentEmojis {
+    override suspend fun invoke(): Result<ImmutableList<String>> = Result.success(persistentListOf())
+}

libraries/emoji/impl/src/main/kotlin/io/element/android/libraries/emoji/impl/picker/DefaultEmojiPickerPresenter.kt

@@ -17,8 +17,10 @@ import androidx.compose.runtime.produceState
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalInspectionMode
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedFactory
+import dev.zacsweers.metro.AssistedInject
 import dev.zacsweers.metro.ContributesBinding
-import dev.zacsweers.metro.Inject
 import io.element.android.emojibasebindings.Emoji
 import io.element.android.libraries.core.coroutine.CoroutineDispatchers
 import io.element.android.libraries.designsystem.theme.components.IconSource
@@ -37,13 +39,18 @@ import kotlinx.coroutines.delay
 import kotlinx.coroutines.withContext
 import kotlin.time.Duration.Companion.milliseconds
 
-@Inject
-@ContributesBinding(SessionScope::class)
+@AssistedInject
 class DefaultEmojiPickerPresenter(
     private val emojibaseProvider: EmojibaseProvider,
-    private val getRecentEmojis: GetRecentEmojis,
+    @Assisted private val getRecentEmojis: GetRecentEmojis,
     private val coroutineDispatchers: CoroutineDispatchers,
 ) : EmojiPickerPresenter {
+    @AssistedFactory
+    @ContributesBinding(SessionScope::class)
+    interface Factory : EmojiPickerPresenter.Factory {
+        override fun create(getRecentEmojis: GetRecentEmojis): DefaultEmojiPickerPresenter
+    }
+
     @Composable
     override fun present(): EmojiPickerState {
         val queryState = rememberTextFieldState()
@@ -86,7 +93,9 @@ class DefaultEmojiPickerPresenter(
         val searchQuery = queryState.text.toString()
         LaunchedEffect(searchQuery, data) {
             if (searchQuery.isEmpty() || data.allEmojis.isEmpty()) {
-                emojiResults = SearchBarResultState.Initial()
+                if (emojiResults !is SearchBarResultState.Initial) {
+                    emojiResults = SearchBarResultState.Initial()
+                }
                 return@LaunchedEffect
             }
             delay(100.milliseconds)