Fix/graphql subscriptions logging (#704)

* Only log operationMessage in case gql logging is enabled

* Always log message type and operation name

server/src/main/kotlin/suwayomi/tachidesk/graphql/server/subscriptions/ApolloSubscriptionProtocolHandler.kt

@@ -35,6 +35,7 @@ import suwayomi.tachidesk.graphql.server.subscriptions.SubscriptionOperationMess
 import suwayomi.tachidesk.graphql.server.subscriptions.SubscriptionOperationMessage.ServerMessages.GQL_ERROR
 import suwayomi.tachidesk.graphql.server.subscriptions.SubscriptionOperationMessage.ServerMessages.GQL_NEXT
 import suwayomi.tachidesk.graphql.server.toGraphQLContext
+import suwayomi.tachidesk.server.serverConfig
 
 /**
  * Implementation of the `graphql-ws` protocol defined by Apollo
@@ -52,9 +53,30 @@ class ApolloSubscriptionProtocolHandler(
     private val basicConnectionErrorMessage = SubscriptionOperationMessage(type = GQL_ERROR.type)
     private val acknowledgeMessage = SubscriptionOperationMessage(GQL_CONNECTION_ACK.type)
 
+    private fun getOperationName(payload: Any?): String {
+        val unknownOperationName = "__UNKNOWN__"
+
+        try {
+            @Suppress("UNCHECKED_CAST")
+            return (payload as Map<String, String>)["operationName"] ?: unknownOperationName
+        } catch (e: Exception) {
+            return unknownOperationName
+        }
+    }
+
     fun handleMessage(context: WsMessageContext): Flow<SubscriptionOperationMessage> {
         val operationMessage = convertToMessageOrNull(context.message()) ?: return flowOf(basicConnectionErrorMessage)
-        logger.debug { "GraphQL subscription client message, sessionId=${context.sessionId} operationMessage=$operationMessage" }
+        logger.debug {
+            "GraphQL subscription client message, sessionId=${context.sessionId} type=${operationMessage.type} operationName=${
+            getOperationName(operationMessage.payload)
+            } ${
+            if (serverConfig.gqlDebugLogsEnabled.value) {
+                "operationMessage=$operationMessage"
+            } else {
+                ""
+            }
+            }"
+        }
 
         return try {
             when (operationMessage.type) {