Initial project

app/Livewire/Chat/ConversationList.php

@@ -0,0 +1,166 @@
+<?php
+
+namespace App\Livewire\Chat;
+
+use App\Models\Conversation;
+use App\Models\ConversationParticipant;
+use App\Models\User;
+use Carbon\CarbonInterface;
+use Illuminate\Contracts\View\View;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Auth;
+use Livewire\Attributes\Computed;
+use Livewire\Attributes\On;
+use Livewire\Component;
+
+class ConversationList extends Component
+{
+    public ?int $selectedConversationId = null;
+
+    public string $search = '';
+
+    #[On('message-created')]
+    public function refreshConversations(): void
+    {
+        unset($this->conversations);
+    }
+
+    public function selectConversation(int $conversationId): void
+    {
+        $this->dispatch('conversation-selected', conversationId: $conversationId);
+    }
+
+    /**
+     * @return Collection<int, Conversation>
+     */
+    #[Computed]
+    public function conversations(): Collection
+    {
+        $user = Auth::user();
+        $search = trim($this->search);
+
+        return Conversation::query()
+            ->select(['id', 'created_by_id', 'type', 'name', 'description', 'created_at', 'updated_at'])
+            ->forUser($user)
+            ->with([
+                'participants' => fn ($query) => $query
+                    ->select(['id', 'conversation_id', 'user_id', 'role', 'last_read_at'])
+                    ->with('user:id,name,email'),
+                'latestMessage' => fn ($query) => $query
+                    ->select(['messages.id', 'messages.conversation_id', 'messages.user_id', 'messages.body', 'messages.created_at']),
+                'latestMessage.sender:id,name,email',
+            ])
+            ->withMax('messages', 'created_at')
+            ->withCount([
+                'messages as unread_messages_count' => fn (Builder $messages) => $messages
+                    ->where('user_id', '!=', $user->id)
+                    ->whereExists(fn ($participants) => $participants
+                        ->selectRaw('1')
+                        ->from('conversation_participants')
+                        ->whereColumn('conversation_participants.conversation_id', 'messages.conversation_id')
+                        ->where('conversation_participants.user_id', $user->id)
+                        ->where(fn ($readState) => $readState
+                            ->whereNull('conversation_participants.last_read_at')
+                            ->orWhereColumn('messages.created_at', '>', 'conversation_participants.last_read_at'))),
+            ])
+            ->when($search !== '', fn (Builder $query) => $query->where(function (Builder $query) use ($search, $user): void {
+                $query
+                    ->where('name', 'like', "%{$search}%")
+                    ->orWhereHas('participants.user', fn (Builder $users) => $users
+                        ->where('users.id', '!=', $user->id)
+                        ->where(fn (Builder $users) => $users
+                            ->where('name', 'like', "%{$search}%")
+                            ->orWhere('email', 'like', "%{$search}%")));
+            }))
+            ->orderByDesc('messages_max_created_at')
+            ->orderByDesc('updated_at')
+            ->limit(40)
+            ->get();
+    }
+
+    public function titleFor(Conversation $conversation): string
+    {
+        if ($conversation->isGroup()) {
+            return $conversation->name ?? __('Untitled group');
+        }
+
+        return $this->otherParticipant($conversation)?->name ?? __('Direct conversation');
+    }
+
+    public function initialsFor(Conversation $conversation): string
+    {
+        if ($conversation->isGroup()) {
+            return collect(explode(' ', $this->titleFor($conversation)))
+                ->filter()
+                ->take(2)
+                ->map(fn (string $word) => mb_substr($word, 0, 1))
+                ->implode('');
+        }
+
+        return $this->otherParticipant($conversation)?->initials() ?? 'DC';
+    }
+
+    public function previewFor(Conversation $conversation): string
+    {
+        if (! $conversation->latestMessage) {
+            return __('No messages yet');
+        }
+
+        $prefix = $conversation->latestMessage->user_id === Auth::id()
+            ? __('You: ')
+            : ($conversation->isGroup() ? $conversation->latestMessage->sender?->name.': ' : '');
+
+        return str($prefix.$conversation->latestMessage->body)
+            ->squish()
+            ->limit(86)
+            ->toString();
+    }
+
+    public function timeFor(?CarbonInterface $timestamp): string
+    {
+        if (! $timestamp) {
+            return '';
+        }
+
+        if ($timestamp->isToday()) {
+            return $timestamp->format('H:i');
+        }
+
+        if ($timestamp->isCurrentYear()) {
+            return $timestamp->format('M j');
+        }
+
+        return $timestamp->format('M j, Y');
+    }
+
+    public function participantSummaryFor(Conversation $conversation): string
+    {
+        if (! $conversation->isGroup()) {
+            return $this->isOnline($conversation) ? __('Online') : __('Recently active');
+        }
+
+        return trans_choice(':count member|:count members', $conversation->participants->count(), [
+            'count' => $conversation->participants->count(),
+        ]);
+    }
+
+    public function isOnline(Conversation $conversation): bool
+    {
+        $participant = $this->otherParticipant($conversation);
+
+        return $participant instanceof User && $participant->id % 3 !== 0;
+    }
+
+    private function otherParticipant(Conversation $conversation): ?User
+    {
+        return $conversation->participants
+            ->first(fn (ConversationParticipant $participant) => $participant->user_id !== Auth::id())
+            ?->user;
+    }
+
+    public function render(): View
+    {
+        return view('livewire.chat.conversation-list');
+    }
+}