Laravel alert

app-events-SiteAnnouncement.php

<?php

/*
app/events/SiteAnnouncement.php
*/

namespace App\Events;

use App\Models\Announcement;
use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class SiteAnnouncement implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $message;

    public function __construct($message) {
        $this->message = $message;
    }

    public function broadcastOn(): Channel {
        return new Channel('public.announcements'); // Public channel
    }
}

app-Filament-Resources-AnnouncementResource.php

<?php
/*
app/Filament/Resources/AnnouncementResource.php
*/

namespace App\Filament\Resources;

use App\Filament\Resources\AnnouncementResource\Pages;
use App\Filament\Resources\AnnouncementResource\RelationManagers;
use App\Models\Announcement;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Textarea;
use Filament\Forms\Components\Toggle;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletingScope;

class AnnouncementResource extends Resource
{
    protected static ?string $model = Announcement::class;

    protected static ?string $navigationGroup = 'Notifications';

    protected static ?string $navigationIcon = 'heroicon-o-rectangle-stack';

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Toggle::make('active')
                    ->columnSpanFull(),
                TextInput::make('title')
                    ->maxLength(255),
                TextInput::make('url'),
                TextArea::make('text')
                    ->columnSpanFull(),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('title')
                    ->searchable(),
                Tables\Columns\TextColumn::make('text')
                    ->searchable(),
                Tables\Columns\TextColumn::make('url')
                    ->searchable(),
                Tables\Columns\IconColumn::make('active')
                    ->boolean(),
                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                //
            ])
            ->actions([
                Tables\Actions\EditAction::make(),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                ]),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            //
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListAnnouncements::route('/'),
            'create' => Pages\CreateAnnouncement::route('/create'),
            'edit' => Pages\EditAnnouncement::route('/{record}/edit'),
        ];
    }
}

app-livewire-Announcement.php

<?php

/*
app/livewire/Announcement.php
*/

namespace App\Livewire;

use Livewire\Component;

class Announcement extends Component
{
    public function render()
    {
        return view('livewire.announcement');
    }
}

app-Providers-AppServiceProvider.php

<?php

/*
app/Providers/AppServiceProvider.php
*/


namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Gate;
use Illuminate\Contracts\Auth\Access\Gate as GateContract;
use Illuminate\Support\Facades\View;
use App\Models\Announcement;
use CmsMulti\FilamentClearCache\Facades\FilamentClearCache;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        //
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(GateContract $gate)
    {
        FilamentClearCache::addCommand('page-cache:clear');

        $activeAnnouncement = Announcement::where('active', true)->first();
              

        // Share the announcement with all views
        View::share('activeAnnouncement', $activeAnnouncement);
    }
}

model-Announcement.php

<?php

/*
app/models/Announcement.php
*/

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Announcement extends Model
{
    protected $fillable = [
        'title', 'text', 'url', 'active',
    ];
    
}

resources-views-livewire-announcement.blade.php

<!--
resources/views/livewire/announcement.blade.php
-->

<!-- livewire -->
<div wire:poll.5s>
@if (isset($activeAnnouncement) && $activeAnnouncement)
  <div class="w-full bg-red-700 text-white p-3 text-center font-bold text-lg animate-pulse">
@if($activeAnnouncement->url)
<a href="{{ $activeAnnouncement->url }}">
  @endif
  @if($activeAnnouncement->text)
    {{ $activeAnnouncement->text }}
  @endif
  @if($activeAnnouncement->url)
  </a>
  @endif
  </div>
@endif
</div>
<!-- end -->