Fix sync issues

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/model/FavouriteCategorySyncDto.kt

@@ -34,7 +34,7 @@ data class FavouriteCategorySyncDto(
 		put("created_at", createdAt)
 		put("sort_key", sortKey)
 		put("title", title)
-		put("order", order)
+		put("`order`", order)
 		put("track", track)
 		put("show_in_lib", isVisibleInLibrary)
 		put("deleted_at", deletedAt)

app/src/main/kotlin/org/koitharu/kotatsu/sync/data/model/SyncDto.kt

@@ -5,8 +5,8 @@ import kotlinx.serialization.Serializable
 
 @Serializable
 data class SyncDto(
-	@SerialName("history") val history: List<HistorySyncDto>?,
+	@SerialName("history") val history: List<HistorySyncDto>? = null,
-	@SerialName("categories") val categories: List<FavouriteCategorySyncDto>?,
+	@SerialName("categories") val categories: List<FavouriteCategorySyncDto>? = null,
-	@SerialName("favourites") val favourites: List<FavouriteSyncDto>?,
+	@SerialName("favourites") val favourites: List<FavouriteSyncDto>? = null,
 	@SerialName("timestamp") val timestamp: Long,
 )

app/src/main/kotlin/org/koitharu/kotatsu/sync/domain/SyncHelper.kt

@@ -22,7 +22,6 @@ import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
-import okhttp3.internal.closeQuietly
 import okio.IOException
 import org.jetbrains.annotations.Blocking
 import org.koitharu.kotatsu.BuildConfig
@@ -89,12 +88,12 @@ class SyncHelper @AssistedInject constructor(
 		val response = httpClient.newCall(request).execute().parseDtoOrNull()
 		response?.categories?.let { categories ->
 			val categoriesResult = upsertFavouriteCategories(categories)
-			stats.numDeletes += categoriesResult.first().count?.toLong() ?: 0L
+			stats.numDeletes += categoriesResult.firstOrNull()?.count?.toLong() ?: 0L
 			stats.numInserts += categoriesResult.drop(1).sumOf { it.count?.toLong() ?: 0L }
 		}
 		response?.favourites?.let { favourites ->
 			val favouritesResult = upsertFavourites(favourites)
-			stats.numDeletes += favouritesResult.first().count?.toLong() ?: 0L
+			stats.numDeletes += favouritesResult.firstOrNull()?.count?.toLong() ?: 0L
 			stats.numInserts += favouritesResult.drop(1).sumOf { it.count?.toLong() ?: 0L }
 			stats.numEntries += stats.numInserts + stats.numDeletes
 		}
@@ -119,7 +118,7 @@ class SyncHelper @AssistedInject constructor(
 		val response = httpClient.newCall(request).execute().parseDtoOrNull()
 		response?.history?.let { history ->
 			val result = upsertHistory(history)
-			stats.numDeletes += result.first().count?.toLong() ?: 0L
+			stats.numDeletes += result.firstOrNull()?.count?.toLong() ?: 0L
 			stats.numInserts += result.drop(1).sumOf { it.count?.toLong() ?: 0L }
 			stats.numEntries += stats.numInserts + stats.numDeletes
 		}
@@ -286,15 +285,11 @@ class SyncHelper @AssistedInject constructor(
 
 	private fun uri(authority: String, table: String) = "content://$authority/$table".toUri()
 
-	private fun Response.parseDtoOrNull(): SyncDto? {
+	private fun Response.parseDtoOrNull(): SyncDto? = use {
-		return try {
 		when {
-				!isSuccessful -> throw IOException(body?.string())
+			!isSuccessful -> throw IOException(body.string())
 			code == HttpURLConnection.HTTP_NO_CONTENT -> null
-				else -> Json.decodeFromString<SyncDto>(body?.string() ?: return null)
+			else -> Json.decodeFromString<SyncDto>(body.string())
-			}
-		} finally {
-			closeQuietly()
 		}
 	}