[#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/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)