feat: allow canceling search for a migrating manga without remove it

so user can perform manual search without waiting

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

@@ -51,6 +51,9 @@ fun MigrationListScreen(
     onMigrationItemClick: (Manga) -> Unit,
     openMigrationDialog: (Boolean) -> Unit,
     skipManga: (Long) -> Unit,
+    // KMK -->
+    cancelManga: (Long) -> Unit,
+    // KMK <--
     searchManually: (MigratingManga) -> Unit,
     migrateNow: (Long) -> Unit,
     copyNow: (Long) -> Unit,
@@ -138,6 +141,9 @@ fun MigrationListScreen(
                             .weight(0.2f),
                         result = result,
                         skipManga = { skipManga(migrationItem.manga.id) },
+                        // KMK -->
+                        cancelManga = { cancelManga(migrationItem.manga.id) },
+                        // KMK <--
                         searchManually = { searchManually(migrationItem) },
                         migrateNow = {
                             migrateNow(migrationItem.manga.id)

app/src/main/java/eu/kanade/presentation/browse/components/MigrationActionIcon.kt

@@ -27,6 +27,9 @@ fun MigrationActionIcon(
     modifier: Modifier,
     result: MigratingManga.SearchResult,
     skipManga: () -> Unit,
+    // KMK -->
+    cancelManga: () -> Unit,
+    // KMK <--
     searchManually: () -> Unit,
     migrateNow: () -> Unit,
     copyNow: () -> Unit,
@@ -36,7 +39,9 @@ fun MigrationActionIcon(
 
     Box(modifier) {
         if (result is MigratingManga.SearchResult.Searching) {
-            IconButton(onClick = skipManga) {
+            // KMK -->
+            IconButton(onClick = cancelManga) {
+                // KMK <--
                 Icon(
                     imageVector = Icons.Outlined.Close,
                     contentDescription = stringResource(SYMR.strings.action_stop),

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/advanced/process/MigratingManga.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.ui.browse.migration.advanced.process
 
 import android.content.Context
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -20,6 +21,10 @@ class MigratingManga(
 ) {
     val migrationScope = CoroutineScope(parentContext + SupervisorJob() + Dispatchers.Default)
 
+    // KMK -->
+    lateinit var searchingJob: Deferred<Manga?>
+    // KMK <--
+
     val searchResult = MutableStateFlow<SearchResult>(SearchResult.Searching)
 
     // <MAX, PROGRESS>

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/advanced/process/MigrationListScreen.kt

@@ -106,6 +106,9 @@ class MigrationListScreen(private val config: MigrationProcedureConfig) : Screen
             },
             openMigrationDialog = screenModel::openMigrateDialog,
             skipManga = { screenModel.removeManga(it) },
+            // KMK -->
+            cancelManga = { screenModel.cancelManga(it) },
+            // KMK <--
             searchManually = { migrationItem ->
                 val sources = screenModel.getMigrationSources()
                 val validSources = if (sources.size == 1) {

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/advanced/process/MigrationListScreenModel.kt

@@ -180,7 +180,9 @@ class MigrationListScreenModel(
                 val mangaSource = sourceManager.getOrStub(mangaObj.source)
 
                 val result = try {
-                    manga.migrationScope.async {
+                    // KMK -->
+                    manga.searchingJob = manga.migrationScope.async {
+                        // KMK <--
                         val validSources = if (sources.size == 1) {
                             sources
                         } else {
@@ -288,7 +290,10 @@ class MigrationListScreenModel(
 
                             null
                         }
-                    }.await()
+                    }
+                    // KMK -->
+                    manga.searchingJob.await()
+                    // KMK <--
                 } catch (e: CancellationException) {
                     // Ignore canceled migrations
                     continue
@@ -434,6 +439,7 @@ class MigrationListScreenModel(
         updateManga.awaitAll(listOfNotNull(mangaUpdate, prevMangaUpdate))
     }
 
+    /** Set a manga picked from manual search to be used as migration target */
     fun useMangaForMigration(context: Context, newMangaId: Long, selectedMangaId: Long) {
         val migratingManga = migratingItems.value.orEmpty().find { it.manga.id == selectedMangaId }
             ?: return
@@ -545,6 +551,19 @@ class MigrationListScreenModel(
         }
     }
 
+    // KMK -->
+    /** Cancel searching without remove it from list so user can perform manual search */
+    fun cancelManga(mangaId: Long) {
+        screenModelScope.launchIO {
+            val item = migratingItems.value.orEmpty().find { it.manga.id == mangaId }
+                ?: return@launchIO
+            item.searchingJob.cancel()
+            item.searchResult.value = SearchResult.NotFound
+            sourceFinished()
+        }
+    }
+    // KMK <--
+
     fun removeManga(mangaId: Long) {
         screenModelScope.launchIO {
             val item = migratingItems.value.orEmpty().find { it.manga.id == mangaId }