fix: return null instead of 0 for song year and playCount

Author: sumitkolhe

src/modules/songs/helpers/song.helper.ts

@@ -7,12 +7,12 @@ export const createSongPayload = (song: z.infer<typeof SongAPIResponseModel>): z
   id: song.id,
   name: song.title,
   type: song.type,
-  year: song?.year || null,
+  year: song.year || null,
   releaseDate: song.more_info?.release_date || null,
   duration: song.more_info?.duration ? Number(song.more_info?.duration) : null,
   label: song.more_info?.label || null,
   explicitContent: song.explicit_content === '1',
-  playCount: Number(song.play_count || 0),
+  playCount: song.play_count ? Number(song.play_count) : null,
   language: song.language,
   hasLyrics: song.more_info?.has_lyrics === 'true',
   lyricsId: song.more_info?.lyrics_id || null,

src/modules/songs/models/song.model.ts

@@ -66,7 +66,7 @@ export const SongModel = z.object({
   duration: z.number().nullable(),
   label: z.string().nullable(),
   explicitContent: z.boolean(),
-  playCount: z.number(),
+  playCount: z.number().nullable(),
   language: z.string(),
   hasLyrics: z.boolean(),
   lyricsId: z.string().nullable(),