Address Build Warnings and Cleanup (#707)

* Address build warnings and cleanup

* Actual name of who defined the protocol

* Remove uneeded detekt supression

* GraphQL Before-After cleanup

* Lint

* Cleanup unused functions

* Fix some discrepancies with the 1.5 source api and fix lang exception

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/download/DownloadManager.kt

@@ -13,6 +13,7 @@ import io.javalin.websocket.WsContext
 import io.javalin.websocket.WsMessageContext
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
@@ -51,6 +52,7 @@ import kotlin.time.Duration.Companion.seconds
 
 private val logger = KotlinLogging.logger {}
 
+@OptIn(FlowPreview::class)
 object DownloadManager {
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
     private val clients = ConcurrentHashMap<String, WsContext>()
@@ -150,9 +152,6 @@ object DownloadManager {
         if (immediate) {
             sendStatusToAllClients()
         }
-        /*if (downloadChapter != null) { TODO GRAPHQL
-            downloadSubscriptionSource.publish(downloadChapter)
-        }*/
     }
 
     private fun getStatus(): DownloadStatus {

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/download/fileProvider/FileDownloader.kt

@@ -12,6 +12,7 @@ fun interface FileDownload0Args : FileDownload {
     }
 }
 
+@Suppress("UNCHECKED_CAST")
 fun interface FileDownload3Args<A, B, C> : FileDownload {
     suspend fun execute(
         a: A,

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/download/fileProvider/FileRetriever.kt

@@ -14,6 +14,7 @@ fun interface RetrieveFile0Args : RetrieveFile {
     }
 }
 
+@Suppress("UNCHECKED_CAST")
 fun interface RetrieveFile1Args<A> : RetrieveFile {
     fun execute(a: A): Pair<InputStream, String>