Add Option to Fallback to Series Cover when syncing Book Covers

README.md

@@ -105,6 +105,7 @@ komga:
       mergeGenres: false # if true and aggregate is enabled will merge genres from all providers
       bookCovers: false # update book thumbnails
       seriesCovers: false # update series thumbnails
+      fallbackUseSeriesCoverForBook: false # If updating series cover and book cover, and no book cover exists, use the series cover for the book cover.
       overrideExistingCovers: true # if false will upload but not select new cover if another cover already exists
       overrideComicInfo: false # Replace existing ComicInfo file. If false, only append additional data
       postProcessing:
@@ -144,6 +145,7 @@ kavita:
       mergeGenres: false # if true and aggregate is enabled will merge genres from all providers
       bookCovers: false #update book thumbnails
       seriesCovers: false #update series thumbnails
+      fallbackUseSeriesCoverForBook: false # If updating series cover and book cover, and no book cover exists, use the series cover for the book cover.
       overrideExistingCovers: true # if false will upload but not select new cover if another cover already exists
       lockCovers: true # lock cover images so that kavita does not change them
       postProcessing:
@@ -259,6 +261,7 @@ komga_or_kavita:
         aggregate: false
         bookCovers: false
         seriesCovers: false
+        fallbackUseSeriesCoverForBook: false
         postProcessing:
           seriesTitle: false
           titleType: LOCALIZED

komf-api-models/src/commonMain/kotlin/snd/komf/api/config/KomfConfig.kt

@@ -47,6 +47,7 @@ data class MetadataProcessingConfigDto(
     val mergeGenres: Boolean,
     val bookCovers: Boolean,
     val seriesCovers: Boolean,
+    val fallbackUseSeriesCoverForBook: Boolean,
     val overrideExistingCovers: Boolean,
     val lockCovers: Boolean,
 

komf-api-models/src/commonMain/kotlin/snd/komf/api/config/KomfConfigUpdateRequest.kt

@@ -50,6 +50,7 @@ data class MetadataProcessingConfigUpdateRequest(
 
     val bookCovers: PatchValue<Boolean> = PatchValue.Unset,
     val seriesCovers: PatchValue<Boolean> = PatchValue.Unset,
+    val fallbackUseSeriesCoverForBook: PatchValue<Boolean> = PatchValue.Unset,
     val overrideExistingCovers: PatchValue<Boolean> = PatchValue.Unset,
     val lockCovers: PatchValue<Boolean> = PatchValue.Unset,
     val updateModes: PatchValue<Collection<KomfUpdateMode>> = PatchValue.Unset,

komf-app/src/main/kotlin/snd/komf/app/api/deprecated/DeprecatedConfigUpdateMapper.kt

@@ -116,6 +116,7 @@ class DeprecatedConfigUpdateMapper {
             mergeGenres = config.mergeGenres,
             bookCovers = config.bookCovers,
             seriesCovers = config.seriesCovers,
+            fallbackUseSeriesCoverForBook = config.fallbackUseSeriesCoverForBook,
             overrideExistingCovers = config.overrideExistingCovers,
             lockCovers = config.lockCovers,
             updateModes = config.updateModes,
@@ -544,6 +545,7 @@ class DeprecatedConfigUpdateMapper {
             mergeGenres = patch.mergeGenres ?: config.mergeGenres,
             bookCovers = patch.bookCovers ?: config.bookCovers,
             seriesCovers = patch.seriesCovers ?: config.seriesCovers,
+            fallbackUseSeriesCoverForBook = patch.fallbackUseSeriesCoverForBook ?: config.fallbackUseSeriesCoverForBook,
             overrideExistingCovers = patch.overrideExistingCovers ?: config.overrideExistingCovers,
             updateModes = patch.updateModes ?: config.updateModes,
             postProcessing = patch.postProcessing

komf-app/src/main/kotlin/snd/komf/app/api/deprecated/dto/AppConfigDto.kt

@@ -51,6 +51,7 @@ data class MetadataProcessingConfigDto(
     val mergeGenres: Boolean,
     val bookCovers: Boolean,
     val seriesCovers: Boolean,
+    val fallbackUseSeriesCoverForBook: Boolean,
     val overrideExistingCovers: Boolean,
     var lockCovers: Boolean,
     val updateModes: List<UpdateMode>,

komf-app/src/main/kotlin/snd/komf/app/api/deprecated/dto/AppConfigUpdateDto.kt

@@ -59,6 +59,7 @@ data class MetadataProcessingConfigUpdateDto(
     val mergeTags: Boolean? = null,
     val mergeGenres: Boolean? = null,
     val seriesCovers: Boolean? = null,
+    val fallbackUseSeriesCoverForBook: Boolean? = null,
     val overrideExistingCovers: Boolean? = null,
     var lockCovers: Boolean? = null,
     val updateModes: List<UpdateMode>? = null,

komf-app/src/main/kotlin/snd/komf/app/api/mappers/AppConfigMapper.kt

@@ -98,6 +98,7 @@ class AppConfigMapper {
             mergeGenres = config.mergeGenres,
             bookCovers = config.bookCovers,
             seriesCovers = config.seriesCovers,
+            fallbackUseSeriesCoverForBook = config.fallbackUseSeriesCoverForBook,
             overrideExistingCovers = config.overrideExistingCovers,
             lockCovers = config.lockCovers,
             updateModes = config.updateModes.map { it.fromUpdateMode() },

komf-app/src/main/kotlin/snd/komf/app/api/mappers/AppConfigUpdateMapper.kt

@@ -383,6 +383,7 @@ class AppConfigUpdateMapper {
             mergeGenres = patch.mergeGenres.getOrNull() ?: config.mergeGenres,
             bookCovers = patch.bookCovers.getOrNull() ?: config.bookCovers,
             seriesCovers = patch.seriesCovers.getOrNull() ?: config.seriesCovers,
+            fallbackUseSeriesCoverForBook = patch.fallbackUseSeriesCoverForBook.getOrNull() ?: config.fallbackUseSeriesCoverForBook,
             overrideExistingCovers = patch.overrideExistingCovers.getOrNull() ?: config.overrideExistingCovers,
             lockCovers = patch.lockCovers.getOrNull() ?: config.lockCovers,
             updateModes = patch.updateModes.getOrNull()?.map { it.toUpdateMode() } ?: config.updateModes,

komf-mediaserver/src/commonMain/kotlin/snd/komf/mediaserver/MediaServerModule.kt

@@ -352,6 +352,7 @@ class MediaServerModule(
             updateModes = config.updateModes.toSet(),
             uploadBookCovers = config.bookCovers,
             uploadSeriesCovers = config.seriesCovers,
+            fallbackUseSeriesCoverForBook = config.fallbackUseSeriesCoverForBook,
             overrideExistingCovers = config.overrideExistingCovers,
             lockCovers = config.lockCovers,
         )

komf-mediaserver/src/commonMain/kotlin/snd/komf/mediaserver/config/MediaServerConfig.kt

@@ -49,6 +49,7 @@ data class MetadataProcessingConfig(
 
     val bookCovers: Boolean = false,
     val seriesCovers: Boolean = false,
+    val fallbackUseSeriesCoverForBook: Boolean = false,
     val overrideExistingCovers: Boolean = true,
     var lockCovers: Boolean = true,
     val updateModes: List<UpdateMode> = listOf(API),

komf-mediaserver/src/commonMain/kotlin/snd/komf/mediaserver/metadata/MetadataUpdater.kt

@@ -34,6 +34,7 @@ class MetadataUpdater(
     private val overrideExistingCovers: Boolean,
     private val uploadBookCovers: Boolean,
     private val uploadSeriesCovers: Boolean,
+    private val fallbackUseSeriesCoverForBook: Boolean,
     private val lockCovers: Boolean,
 ) {
     private val requireMetadataRefresh = setOf(UpdateMode.COMIC_INFO)
@@ -136,7 +137,9 @@ class MetadataUpdater(
             }
         }
 
-        val newThumbnail = if (uploadBookCovers) metadata?.thumbnail else null
+        val newThumbnail = if (uploadBookCovers) {
+            metadata?.thumbnail ?: if (fallbackUseSeriesCoverForBook && uploadSeriesCovers) seriesMeta.thumbnail else null
+        } else null
         val thumbnailId = replaceBookThumbnail(book.id, newThumbnail)
 
         if (thumbnailId == null) {