[#1496] Image conversion (#1505)

* [#1496] First conversion attempt

* [#1496] Configurable conversion

* Fix: allow nested configs (map)

* [#1496] Support explicit `none` conversion

* Use MimeUtils for provided download

* [1496] Support image conversion on load for downloaded images

* Lint

* [#1496] Support conversion on fresh download as well

Previous commit was only for already downloaded images, now also for
fresh and cached

* [#1496] Refactor: Move where conversion for download happens

* Rewrite config handling, improve custom types

* Lint

* Add format to pages mutation

* Lint

* Standardize url encode

* Lint

* Config: Allow additional conversion parameters

* Implement conversion quality parameter

* Lint

* Implement a conversion util to allow fallback readers

* Add downloadConversions to api and backup, fix updateValue issues

* Lint

* Minor cleanup

* Update libs.versions.toml

---------

Co-authored-by: Syer10 <syer10@users.noreply.github.com>

server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/ChapterMutation.kt

@@ -16,6 +16,7 @@ import suwayomi.tachidesk.manga.impl.chapter.getChapterDownloadReadyById
 import suwayomi.tachidesk.manga.model.table.ChapterMetaTable
 import suwayomi.tachidesk.manga.model.table.ChapterTable
 import suwayomi.tachidesk.server.JavalinSetup.future
+import java.net.URLEncoder
 import java.time.Instant
 import java.util.concurrent.CompletableFuture
 
@@ -226,7 +227,15 @@ class ChapterMutation {
     data class FetchChapterPagesInput(
         val clientMutationId: String? = null,
         val chapterId: Int,
-    )
+        val format: String? = null,
+    ) {
+        fun toParams(): Map<String, String> =
+            buildMap {
+                if (!format.isNullOrBlank()) {
+                    put("format", format)
+                }
+            }
+    }
 
     data class FetchChapterPagesPayload(
         val clientMutationId: String?,
@@ -236,16 +245,32 @@ class ChapterMutation {
 
     fun fetchChapterPages(input: FetchChapterPagesInput): CompletableFuture<DataFetcherResult<FetchChapterPagesPayload?>> {
         val (clientMutationId, chapterId) = input
+        val paramsMap = input.toParams()
 
         return future {
             asDataFetcherResult {
                 val chapter = getChapterDownloadReadyById(chapterId)
 
+                val params =
+                    buildString {
+                        if (paramsMap.isNotEmpty()) {
+                            append("?")
+                            paramsMap.entries.forEach { entry ->
+                                if (length > 1) {
+                                    append("&")
+                                }
+                                append(entry.key)
+                                append("=")
+                                append(URLEncoder.encode(entry.value, Charsets.UTF_8))
+                            }
+                        }
+                    }
+
                 FetchChapterPagesPayload(
                     clientMutationId = clientMutationId,
                     pages =
                         List(chapter.pageCount) { index ->
-                            "/api/v1/manga/${chapter.mangaId}/chapter/${chapter.index}/page/$index"
+                            "/api/v1/manga/${chapter.mangaId}/chapter/${chapter.index}/page/${index}$params"
                         },
                     chapter = ChapterType(chapter),
                 )

server/src/main/kotlin/suwayomi/tachidesk/graphql/mutations/SettingsMutation.kt

@@ -111,6 +111,18 @@ class SettingsMutation {
         configSetting.value = newSetting
     }
 
+    private fun <SettingType : Any, RealSettingType : Any> updateSetting(
+        newSetting: RealSettingType?,
+        configSetting: MutableStateFlow<SettingType>,
+        mapper: (RealSettingType) -> SettingType,
+    ) {
+        if (newSetting == null) {
+            return
+        }
+
+        configSetting.value = mapper(newSetting)
+    }
+
     @GraphQLIgnore
     fun updateSettings(settings: Settings) {
         updateSetting(settings.ip, serverConfig.ip)
@@ -140,6 +152,15 @@ class SettingsMutation {
         updateSetting(settings.autoDownloadAheadLimit, serverConfig.autoDownloadNewChaptersLimit) // deprecated
         updateSetting(settings.autoDownloadNewChaptersLimit, serverConfig.autoDownloadNewChaptersLimit)
         updateSetting(settings.autoDownloadIgnoreReUploads, serverConfig.autoDownloadIgnoreReUploads)
+        updateSetting(settings.downloadConversions, serverConfig.downloadConversions) { list ->
+            list.associate {
+                it.mimeType to
+                    ServerConfig.DownloadConversion(
+                        target = it.target,
+                        compressionLevel = it.compressionLevel,
+                    )
+            }
+        }
 
         // extension
         updateSetting(settings.extensionRepos, serverConfig.extensionRepos)
@@ -218,7 +239,12 @@ class SettingsMutation {
         val (clientMutationId) = input
 
         GlobalConfigManager.resetUserConfig()
-        val defaultServerConfig = ServerConfig({ GlobalConfigManager.config.getConfig(SERVER_CONFIG_MODULE_NAME) })
+        val defaultServerConfig =
+            ServerConfig {
+                GlobalConfigManager.config.getConfig(
+                    SERVER_CONFIG_MODULE_NAME,
+                )
+            }
 
         val settings = SettingsType(defaultServerConfig)
         updateSettings(settings)

server/src/main/kotlin/suwayomi/tachidesk/graphql/types/SettingsType.kt

@@ -48,6 +48,7 @@ interface Settings : Node {
     val autoDownloadAheadLimit: Int?
     val autoDownloadNewChaptersLimit: Int?
     val autoDownloadIgnoreReUploads: Boolean?
+    val downloadConversions: List<SettingsDownloadConversion>?
 
     // extension
     val extensionRepos: List<String>?
@@ -113,6 +114,18 @@ interface Settings : Node {
     val opdsChapterSortOrder: SortOrder?
 }
 
+interface SettingsDownloadConversion {
+    val mimeType: String
+    val target: String
+    val compressionLevel: Float?
+}
+
+class SettingsDownloadConversionType(
+    override val mimeType: String,
+    override val target: String,
+    override val compressionLevel: Float?,
+) : SettingsDownloadConversion
+
 data class PartialSettingsType(
     override val ip: String?,
     override val port: Int?,
@@ -142,6 +155,7 @@ data class PartialSettingsType(
     override val autoDownloadAheadLimit: Int?,
     override val autoDownloadNewChaptersLimit: Int?,
     override val autoDownloadIgnoreReUploads: Boolean?,
+    override val downloadConversions: List<SettingsDownloadConversionType>?,
     // extension
     override val extensionRepos: List<String>?,
     // requests
@@ -222,7 +236,8 @@ class SettingsType(
     )
     override val autoDownloadAheadLimit: Int,
     override val autoDownloadNewChaptersLimit: Int,
-    override val autoDownloadIgnoreReUploads: Boolean?,
+    override val autoDownloadIgnoreReUploads: Boolean,
+    override val downloadConversions: List<SettingsDownloadConversionType>,
     // extension
     override val extensionRepos: List<String>,
     // requests
@@ -299,6 +314,13 @@ class SettingsType(
         config.autoDownloadNewChaptersLimit.value, // deprecated
         config.autoDownloadNewChaptersLimit.value,
         config.autoDownloadIgnoreReUploads.value,
+        config.downloadConversions.value.map {
+            SettingsDownloadConversionType(
+                it.key,
+                it.value.target,
+                it.value.compressionLevel,
+            )
+        },
         // extension
         config.extensionRepos.value,
         // requests