Replace 0 with -

src/API/Kitsu/Transformer/AnimeListTransformer.php

@@ -40,7 +40,9 @@ class AnimeListTransformer extends AbstractTransformer {
 		$genres = array_column($anime['relationships']['genres'], 'name') ?? [];
 		sort($genres);
 
-		$rating = (int) 2 * $item['attributes']['rating'];
+		$rating = (int) $item['attributes']['rating'] !== 0
+			? (int) 2 * $item['attributes']['rating']
+			: '-';
 
 		$total_episodes = array_key_exists('episodeCount', $anime) && (int) $anime['episodeCount'] !== 0
 			? (int) $anime['episodeCount']
@@ -68,7 +70,7 @@ class AnimeListTransformer extends AbstractTransformer {
 			'id' => $item['id'],
 			'mal_id' => $MALid,
 			'episodes' => [
-				'watched' => (int) $item['attributes']['progress'] !== '0'
+				'watched' => (int) $item['attributes']['progress'] !== 0
 					? (int) $item['attributes']['progress']
 					: '-',
 				'total' => $total_episodes,
@@ -93,7 +95,7 @@ class AnimeListTransformer extends AbstractTransformer {
 			'notes' => $item['attributes']['notes'],
 			'rewatching' => (bool) $item['attributes']['reconsuming'],
 			'rewatched' => (int) $item['attributes']['reconsumeCount'],
-			'user_rating' => ($rating === 0) ? '-' : (int) $rating,
+			'user_rating' => $rating,
 			'private' => (bool) $item['attributes']['private'] ?? FALSE,
 		];
 	}

src/API/Kitsu/Transformer/MangaListTransformer.php

@@ -42,18 +42,22 @@ class MangaListTransformer extends AbstractTransformer {
 		$genres = array_column($manga['relationships']['genres'], 'name') ?? [];
 		sort($genres);
 
-		$rating = (is_numeric($item['attributes']['rating']))
-			? intval(2 * $item['attributes']['rating'])
+		$rating = (int) $item['attributes']['rating'] !== 0
+			? (int) 2 * $item['attributes']['rating']
 			: '-';
 
-		$totalChapters = ($manga['chapterCount'] > 0)
+		$totalChapters = ((int) $manga['chapterCount'] !== 0)
 			? $manga['chapterCount']
 			: '-';
 
-		$totalVolumes = ($manga['volumeCount'] > 0)
+		$totalVolumes = ((int) $manga['volumeCount'] !== 0)
 			? $manga['volumeCount']
 			: '-';
 
+		$readChapters = ((int) $item['attributes']['progress'] !== 0)
+			? $item['attributes']['progress']
+			: '-';
+
 		$MALid = NULL;
 
 		if (array_key_exists('mappings', $manga['relationships']))
@@ -72,7 +76,7 @@ class MangaListTransformer extends AbstractTransformer {
 			'id' => $item['id'],
 			'mal_id' => $MALid,
 			'chapters' => [
-				'read' => $item['attributes']['progress'],
+				'read' => $readChapters,
 				'total' => $totalChapters
 			],
 			'volumes' => [

tests/API/Kitsu/Transformer/__snapshots__/AnimeListTransformerTest__testTransform__1.php

@@ -3,7 +3,7 @@
   'mal_id' => '33206',
   'episodes' => 
   array (
-    'watched' => 0,
+    'watched' => '-',
     'total' => '-',
     'length' => NULL,
   ),