perf: convert to cbz on first scan

komga/src/main/kotlin/org/gotson/komga/application/tasks/Task.kt

@@ -20,6 +20,11 @@ sealed class Task(priority: Int = DEFAULT_PRIORITY, val groupId: String? = null)
     override fun toString(): String = "ScanLibrary(libraryId='$libraryId', priority='$priority')"
   }
 
+  class FindBooksToConvert(val libraryId: String, priority: Int = DEFAULT_PRIORITY) : Task(priority) {
+    override fun uniqueId() = "FIND_BOOKS_TO_CONVERT_$libraryId"
+    override fun toString(): String = "FindBooksToConvert(libraryId='$libraryId', priority='$priority')"
+  }
+
   class EmptyTrash(val libraryId: String, priority: Int = DEFAULT_PRIORITY) : Task(priority) {
     override fun uniqueId() = "EMPTY_TRASH_$libraryId"
     override fun toString(): String = "EmptyTrash(libraryId='$libraryId', priority='$priority')"

komga/src/main/kotlin/org/gotson/komga/application/tasks/TaskHandler.kt

@@ -60,10 +60,17 @@ class TaskHandler(
               taskReceiver.hashBooksWithoutHash(library)
               taskReceiver.hashBookPagesWithMissingHash(library)
               taskReceiver.repairExtensions(library, LOWEST_PRIORITY)
-              taskReceiver.convertBooksToCbz(library, LOWEST_PRIORITY)
+              taskReceiver.findBooksToConvert(library, LOWEST_PRIORITY)
               taskReceiver.removeDuplicatePages(library, LOWEST_PRIORITY)
             } ?: logger.warn { "Cannot execute task $task: Library does not exist" }
 
+          is Task.FindBooksToConvert ->
+            libraryRepository.findByIdOrNull(task.libraryId)?.let { library ->
+              bookConverter.getConvertibleBooks(library).forEach {
+                taskReceiver.convertBookToCbz(it, task.priority + 1)
+              }
+            } ?: logger.warn { "Cannot execute task $task: Library does not exist" }
+
           is Task.EmptyTrash ->
             libraryRepository.findByIdOrNull(task.libraryId)?.let { library ->
               libraryContentLifecycle.emptyTrash(library)

komga/src/main/kotlin/org/gotson/komga/application/tasks/TaskReceiver.kt

@@ -58,7 +58,7 @@ class TaskReceiver(
         libraryIds = listOf(library.id),
         mediaStatus = listOf(Media.Status.UNKNOWN, Media.Status.OUTDATED),
       ),
-      UnpagedSorted(Sort.by(Sort.Order.asc("seriesId"), Sort.Order.asc("number")))
+      UnpagedSorted(Sort.by(Sort.Order.asc("seriesId"), Sort.Order.asc("number"))),
     ).forEach {
       submitTask(Task.AnalyzeBook(it.id, groupId = it.seriesId))
     }
@@ -78,11 +78,12 @@ class TaskReceiver(
       }
   }
 
-  fun convertBooksToCbz(library: Library, priority: Int = DEFAULT_PRIORITY) {
-    if (library.convertToCbz)
-      bookConverter.getConvertibleBooks(library).forEach {
-        submitTask(Task.ConvertBook(it.id, priority, it.seriesId))
-      }
+  fun findBooksToConvert(library: Library, priority: Int = DEFAULT_PRIORITY) {
+    submitTask(Task.FindBooksToConvert(library.id, priority))
+  }
+
+  fun convertBookToCbz(book: Book, priority: Int = DEFAULT_PRIORITY) {
+    submitTask(Task.ConvertBook(book.id, priority, book.seriesId))
   }
 
   fun repairExtensions(library: Library, priority: Int = DEFAULT_PRIORITY) {

komga/src/main/kotlin/org/gotson/komga/domain/service/BookConverter.kt

@@ -57,7 +57,13 @@ class BookConverter(
   private val skippedRepairs = mutableListOf<String>()
 
   fun getConvertibleBooks(library: Library): Collection<Book> =
-    bookRepository.findAllByLibraryIdAndMediaTypes(library.id, convertibleTypes)
+    if (library.convertToCbz)
+      bookRepository.findAllByLibraryIdAndMediaTypes(library.id, convertibleTypes)
+        .also { logger.info { "Found ${it.size} books to convert" } }
+    else {
+      logger.info { "CBZ conversion is not enabled, skipping" }
+      emptyList()
+    }
 
   fun convertToCbz(book: Book) {
     // perform various checks

komga/src/main/resources/application-dev.yml

@@ -9,8 +9,8 @@ komga:
     file: ":memory:"
   cors.allowed-origins:
     - http://localhost:8081
-  task-consumers: 5
-  task-consumers-max: 20
+#  task-consumers: 5
+#  task-consumers-max: 20
 #  delete-empty-collections: true
 #  delete-empty-read-lists: true
   oauth2-account-creation: false