Update playlist design

app/Livewire/PlaylistOverview.php

@@ -2,10 +2,11 @@
 
 namespace App\Livewire;
 
+use App\Models\Episode;
 use App\Models\Playlist;
 use App\Models\PlaylistEpisode;
 use App\Services\PlaylistService;
-use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Facades\Auth;
 use Livewire\Attributes\Url;
 use Livewire\Component;
@@ -18,14 +19,13 @@ class PlaylistOverview extends Component
     protected PlaylistService $playlistService;
 
     #[Url(history: true)]
-    public $search;
+    public string $search = '';
 
-    public int $pagination = 25;
+    #[Url(history: true)]
+    public int $perPage = 25;
 
     public Playlist $playlist;
 
-    public Collection $playlistEpisodes;
-
     public bool $editingName = false;
 
     public string $editingPlaylistName = '';
@@ -37,35 +37,56 @@ class PlaylistOverview extends Component
 
     public function mount($playlist_id)
     {
-        $this->playlist = Playlist::with(['episodes.episode'])->findOrFail($playlist_id);
+        $this->playlist = Playlist::withCount('episodes')->with('user')->findOrFail($playlist_id);
 
-        // Set position if null
-        $this->playlist->episodes->each(function ($item, $index) {
-            if ($item->position === null) {
-                $item->position = $index + 1;
-                $item->save();
-            }
-        });
+        $this->sanitizePerPage();
 
-        $this->refreshEpisodes();
+        $this->repairNullPositions();
     }
 
-    public function refreshEpisodes()
+    public function updatingSearch(): void
     {
-        $this->playlistEpisodes = $this->playlist->episodes()->orderBy('position')->with('episode')->get();
+        $this->resetPage();
+    }
+
+    public function updatingPerPage(): void
+    {
+        $this->resetPage();
+    }
+
+    public function getEpisodesProperty(): LengthAwarePaginator
+    {
+        $this->sanitizePerPage();
+
+        return PlaylistEpisode::query()
+            ->where('playlist_id', $this->playlist->id)
+            ->when($this->search !== '', fn ($query) => $query->whereHas('episode', fn ($episode) => $episode
+                ->where('title', 'like', '%'.$this->search.'%')
+                ->orWhere('title_jpn', 'like', '%'.$this->search.'%')))
+            ->orderBy('position')
+            ->with(['episode.gallery' => fn ($gallery) => $gallery->orderBy('id')->limit(1)])
+            ->paginate($this->perPage);
+    }
+
+    public function getFirstEpisodeProperty(): ?Episode
+    {
+        return PlaylistEpisode::where('playlist_id', $this->playlist->id)
+            ->orderBy('position')
+            ->first()?->episode;
     }
 
     public function moveUp($episodeId)
     {
-        if (! Auth::check()) {
-            return;
-        }
-
-        if (Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
         $episode = PlaylistEpisode::find($episodeId);
+
+        if (! $episode) {
+            return;
+        }
+
         $above = PlaylistEpisode::where('playlist_id', $episode->playlist_id)
             ->where('position', '<', $episode->position)
             ->orderBy('position', 'desc')
@@ -74,21 +95,20 @@ class PlaylistOverview extends Component
         if ($above) {
             $this->playlistService->swapPositions($episode, $above);
         }
-
-        $this->refreshEpisodes();
     }
 
     public function moveDown($episodeId)
     {
-        if (! Auth::check()) {
-            return;
-        }
-
-        if (Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
         $episode = PlaylistEpisode::find($episodeId);
+
+        if (! $episode) {
+            return;
+        }
+
         $below = PlaylistEpisode::where('playlist_id', $episode->playlist_id)
             ->where('position', '>', $episode->position)
             ->orderBy('position')
@@ -97,28 +117,28 @@ class PlaylistOverview extends Component
         if ($below) {
             $this->playlistService->swapPositions($episode, $below);
         }
-
-        $this->refreshEpisodes();
     }
 
     public function remove($episodeId)
     {
-        if (! Auth::check()) {
-            return;
-        }
-
-        if (Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
         PlaylistEpisode::find($episodeId)?->delete();
         $this->playlistService->reorderPositions($this->playlist);
-        $this->refreshEpisodes();
+        $this->playlist->loadCount('episodes');
+
+        $lastPage = max(1, (int) ceil(PlaylistEpisode::where('playlist_id', $this->playlist->id)->count() / $this->perPage));
+
+        if ($this->getPage() > $lastPage) {
+            $this->setPage($lastPage);
+        }
     }
 
     public function editName()
     {
-        if (! Auth::check() || Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
@@ -134,7 +154,7 @@ class PlaylistOverview extends Component
 
     public function updateName()
     {
-        if (! Auth::check() || Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
@@ -152,7 +172,7 @@ class PlaylistOverview extends Component
 
     public function toggleVisibility()
     {
-        if (! Auth::check() || Auth::user()->id !== $this->playlist->user->id) {
+        if (! $this->isOwner()) {
             return;
         }
 
@@ -160,13 +180,39 @@ class PlaylistOverview extends Component
             'is_private' => ! $this->playlist->is_private,
         ]);
 
-        $this->playlist->refresh();
+        $this->playlist->loadCount('episodes');
     }
 
     public function render()
     {
         return view('livewire.playlist-overview', [
-            'query' => $this->search,
+            'episodes' => $this->episodes,
+            'firstEpisode' => $this->firstEpisode,
+            'isOwner' => $this->isOwner(),
         ]);
     }
+
+    private function isOwner(): bool
+    {
+        return Auth::check() && Auth::user()->id === $this->playlist->user_id;
+    }
+
+    private function sanitizePerPage(): void
+    {
+        if (! in_array($this->perPage, [25, 50, 100], true)) {
+            $this->perPage = 25;
+        }
+    }
+
+    private function repairNullPositions(): void
+    {
+        if (! PlaylistEpisode::where('playlist_id', $this->playlist->id)->whereNull('position')->exists()) {
+            return;
+        }
+
+        PlaylistEpisode::where('playlist_id', $this->playlist->id)
+            ->orderBy('position')->orderBy('id')
+            ->get()
+            ->each(fn ($playlistEpisode, $index) => $playlistEpisode->update(['position' => $index + 1]));
+    }
 }