Support mass migration in 'Browse -> Migrate' (#2338)

app/src/main/java/eu/kanade/presentation/browse/MigrateMangaScreen.kt

@@ -1,84 +0,0 @@
-package eu.kanade.presentation.browse
-
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.lazy.items
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import eu.kanade.presentation.components.AppBar
-import eu.kanade.presentation.manga.components.BaseMangaListItem
-import eu.kanade.tachiyomi.ui.browse.migration.manga.MigrateMangaScreenModel
-import tachiyomi.domain.manga.model.Manga
-import tachiyomi.i18n.MR
-import tachiyomi.presentation.core.components.FastScrollLazyColumn
-import tachiyomi.presentation.core.components.material.Scaffold
-import tachiyomi.presentation.core.screens.EmptyScreen
-
-@Composable
-fun MigrateMangaScreen(
-    navigateUp: () -> Unit,
-    title: String?,
-    state: MigrateMangaScreenModel.State,
-    onClickItem: (Manga) -> Unit,
-    onClickCover: (Manga) -> Unit,
-) {
-    Scaffold(
-        topBar = { scrollBehavior ->
-            AppBar(
-                title = title,
-                navigateUp = navigateUp,
-                scrollBehavior = scrollBehavior,
-            )
-        },
-    ) { contentPadding ->
-        if (state.isEmpty) {
-            EmptyScreen(
-                stringRes = MR.strings.empty_screen,
-                modifier = Modifier.padding(contentPadding),
-            )
-            return@Scaffold
-        }
-
-        MigrateMangaContent(
-            contentPadding = contentPadding,
-            state = state,
-            onClickItem = onClickItem,
-            onClickCover = onClickCover,
-        )
-    }
-}
-
-@Composable
-private fun MigrateMangaContent(
-    contentPadding: PaddingValues,
-    state: MigrateMangaScreenModel.State,
-    onClickItem: (Manga) -> Unit,
-    onClickCover: (Manga) -> Unit,
-) {
-    FastScrollLazyColumn(
-        contentPadding = contentPadding,
-    ) {
-        items(state.titles) { manga ->
-            MigrateMangaItem(
-                manga = manga,
-                onClickItem = onClickItem,
-                onClickCover = onClickCover,
-            )
-        }
-    }
-}
-
-@Composable
-private fun MigrateMangaItem(
-    manga: Manga,
-    onClickItem: (Manga) -> Unit,
-    onClickCover: (Manga) -> Unit,
-    modifier: Modifier = Modifier,
-) {
-    BaseMangaListItem(
-        modifier = modifier,
-        manga = manga,
-        onClickItem = { onClickItem(manga) },
-        onClickCover = { onClickCover(manga) },
-    )
-}

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrateMangaScreen.kt

@@ -1,21 +1,41 @@
 package eu.kanade.tachiyomi.ui.browse.migration.manga
 
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.outlined.ArrowForward
+import androidx.compose.material3.Icon
+import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import cafe.adriel.voyager.core.model.rememberScreenModel
 import cafe.adriel.voyager.navigator.LocalNavigator
 import cafe.adriel.voyager.navigator.currentOrThrow
-import eu.kanade.presentation.browse.MigrateMangaScreen
+import eu.kanade.presentation.components.AppBar
+import eu.kanade.presentation.manga.components.BaseMangaListItem
 import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.ui.manga.MangaScreen
 import eu.kanade.tachiyomi.util.system.toast
 import kotlinx.coroutines.flow.collectLatest
 import mihon.feature.migration.config.MigrationConfigScreen
+import tachiyomi.domain.manga.model.Manga
 import tachiyomi.i18n.MR
+import tachiyomi.presentation.core.components.FastScrollLazyColumn
+import tachiyomi.presentation.core.components.material.ExtendedFloatingActionButton
+import tachiyomi.presentation.core.components.material.Scaffold
+import tachiyomi.presentation.core.i18n.stringResource
+import tachiyomi.presentation.core.screens.EmptyScreen
 import tachiyomi.presentation.core.screens.LoadingScreen
+import tachiyomi.presentation.core.util.selectedBackground
+import tachiyomi.presentation.core.util.shouldExpandFAB
 
 data class MigrateMangaScreen(
     private val sourceId: Long,
@@ -34,13 +54,59 @@ data class MigrateMangaScreen(
             return
         }
 
-        MigrateMangaScreen(
-            navigateUp = navigator::pop,
-            title = state.source!!.name,
-            state = state,
-            onClickItem = { navigator.push(MigrationConfigScreen(it.id)) },
-            onClickCover = { navigator.push(MangaScreen(it.id)) },
-        )
+        BackHandler(enabled = state.selectionMode) {
+            screenModel.clearSelection()
+        }
+
+        val lazyListState = rememberLazyListState()
+
+        Scaffold(
+            topBar = { scrollBehavior ->
+                AppBar(
+                    title = state.source!!.name,
+                    navigateUp = {
+                        if (state.selectionMode) {
+                            screenModel.clearSelection()
+                        } else {
+                            navigator.pop()
+                        }
+                    },
+                    scrollBehavior = scrollBehavior,
+                )
+            },
+            floatingActionButton = {
+                if (state.selectionMode) {
+                    ExtendedFloatingActionButton(
+                        text = { Text(text = stringResource(MR.strings.migrationConfigScreen_continueButtonText)) },
+                        icon = {
+                            Icon(imageVector = Icons.AutoMirrored.Outlined.ArrowForward, contentDescription = null)
+                        },
+                        onClick = {
+                            val selection = state.selection
+                            screenModel.clearSelection()
+                            navigator.push(MigrationConfigScreen(selection))
+                        },
+                        expanded = lazyListState.shouldExpandFAB(),
+                    )
+                }
+            },
+        ) { contentPadding ->
+            if (state.isEmpty) {
+                EmptyScreen(
+                    stringRes = MR.strings.empty_screen,
+                    modifier = Modifier.padding(contentPadding),
+                )
+                return@Scaffold
+            }
+
+            MigrateMangaContent(
+                lazyListState = lazyListState,
+                contentPadding = contentPadding,
+                state = state,
+                onClickItem = screenModel::toggleSelection,
+                onClickCover = { navigator.push(MangaScreen(it.id)) },
+            )
+        }
 
         LaunchedEffect(Unit) {
             screenModel.events.collectLatest { event ->
@@ -52,4 +118,43 @@ data class MigrateMangaScreen(
             }
         }
     }
+
+    @Composable
+    private fun MigrateMangaContent(
+        lazyListState: LazyListState,
+        contentPadding: PaddingValues,
+        state: MigrateMangaScreenModel.State,
+        onClickItem: (Manga) -> Unit,
+        onClickCover: (Manga) -> Unit,
+    ) {
+        FastScrollLazyColumn(
+            state = lazyListState,
+            contentPadding = contentPadding,
+        ) {
+            items(state.titles) { manga ->
+                MigrateMangaItem(
+                    manga = manga,
+                    isSelected = manga.id in state.selection,
+                    onClickItem = onClickItem,
+                    onClickCover = onClickCover,
+                )
+            }
+        }
+    }
+
+    @Composable
+    private fun MigrateMangaItem(
+        manga: Manga,
+        isSelected: Boolean,
+        onClickItem: (Manga) -> Unit,
+        onClickCover: (Manga) -> Unit,
+        modifier: Modifier = Modifier,
+    ) {
+        BaseMangaListItem(
+            modifier = modifier.selectedBackground(isSelected),
+            manga = manga,
+            onClickItem = { onClickItem(manga) },
+            onClickCover = { onClickCover(manga) },
+        )
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrateMangaScreenModel.kt

@@ -16,6 +16,7 @@ import kotlinx.coroutines.flow.receiveAsFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import logcat.LogPriority
+import mihon.core.common.utils.mutate
 import tachiyomi.core.common.util.system.logcat
 import tachiyomi.domain.manga.interactor.GetFavorites
 import tachiyomi.domain.manga.model.Manga
@@ -57,9 +58,23 @@ class MigrateMangaScreenModel(
         }
     }
 
+    fun toggleSelection(item: Manga) {
+        mutableState.update { state ->
+            val selection = state.selection.mutate { list ->
+                if (!list.remove(item.id)) list.add(item.id)
+            }
+            state.copy(selection = selection)
+        }
+    }
+
+    fun clearSelection() {
+        mutableState.update { it.copy(selection = emptySet()) }
+    }
+
     @Immutable
     data class State(
         val source: Source? = null,
+        val selection: Set<Long> = emptySet(),
         private val titleList: ImmutableList<Manga>? = null,
     ) {
 
@@ -71,6 +86,8 @@ class MigrateMangaScreenModel(
 
         val isEmpty: Boolean
             get() = titles.isEmpty()
+
+        val selectionMode = selection.isNotEmpty()
     }
 }