refactoring into clusters

app/Filament/Clusters/Newsletter/MailVorlages/MailVorlageResource.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages;
+
+use App\Filament\Clusters\Newsletter\MailVorlages\Pages\ListMailVorlages;
+use App\Filament\Clusters\Newsletter\MailVorlages\Schemas\MailVorlageForm;
+use App\Filament\Clusters\Newsletter\MailVorlages\Tables\MailVorlagesTable;
+use App\Filament\Clusters\Newsletter\NewsletterCluster;
+use App\Models\MailVorlage;
+use BackedEnum;
+use Filament\Resources\Resource;
+use Filament\Schemas\Schema;
+use Filament\Support\Icons\Heroicon;
+use Filament\Tables\Table;
+
+class MailVorlageResource extends Resource
+{
+    protected static ?string $model = MailVorlage::class;
+
+    protected static ?int $navigationSort = 3;
+
+    protected static ?string $cluster = NewsletterCluster::class;
+
+    protected static string|BackedEnum|null $navigationIcon = Heroicon::OutlinedDocumentText;
+
+    protected static ?string $navigationLabel = 'Mail Vorlagen';
+
+    protected static ?string $modelLabel = 'Mail Vorlagen';
+
+    protected static ?string $pluralModelLabel = 'Mail Vorlagen';
+
+    public static function form(Schema $schema): Schema
+    {
+        return MailVorlageForm::configure($schema);
+    }
+
+    public static function table(Table $table): Table
+    {
+        return MailVorlagesTable::configure($table);
+    }
+
+    public static function getPages(): array
+    {
+        return [
+            'index' => ListMailVorlages::route('/'),
+        ];
+    }
+
+    public static function getNavigationBadge(): ?string
+    {
+        return parent::getEloquentQuery()->count();
+    }
+}

app/Filament/Clusters/Newsletter/MailVorlages/Pages/CreateMailVorlage.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages\Pages;
+
+use App\Filament\Clusters\Newsletter\MailVorlages\MailVorlageResource;
+use Filament\Resources\Pages\CreateRecord;
+
+class CreateMailVorlage extends CreateRecord
+{
+    protected static string $resource = MailVorlageResource::class;
+}

app/Filament/Clusters/Newsletter/MailVorlages/Pages/EditMailVorlage.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages\Pages;
+
+use App\Filament\Clusters\Newsletter\MailVorlages\MailVorlageResource;
+use Filament\Actions\DeleteAction;
+use Filament\Resources\Pages\EditRecord;
+
+class EditMailVorlage extends EditRecord
+{
+    protected static string $resource = MailVorlageResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            DeleteAction::make(),
+        ];
+    }
+}

app/Filament/Clusters/Newsletter/MailVorlages/Pages/ListMailVorlages.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages\Pages;
+
+use App\Filament\Clusters\Newsletter\MailVorlages\MailVorlageResource;
+use Filament\Actions\CreateAction;
+use Filament\Resources\Pages\ListRecords;
+
+class ListMailVorlages extends ListRecords
+{
+    protected static string $resource = MailVorlageResource::class;
+
+    // protected function getTableRecordsPerPageSelectOptions(): array
+    // {
+    //     return [1];
+    // }
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            CreateAction::make()->createAnother(false),
+        ];
+    }
+}

app/Filament/Clusters/Newsletter/MailVorlages/Schemas/MailVorlageForm.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages\Schemas;
+
+use Filament\Forms\Components\RichEditor;
+use Filament\Forms\Components\TextInput;
+use Filament\Schemas\Schema;
+use Illuminate\Support\HtmlString;
+
+class MailVorlageForm
+{
+    public static function configure(Schema $schema): Schema
+    {
+        return $schema
+            ->components([
+                TextInput::make('titel')
+                    ->suffix('Nur zur Kennung')
+                    ->required(),
+                TextInput::make('subjekt')
+                    ->label('Betreff')
+                    ->required(),
+                RichEditor::make('inhalt')
+                    ->required()
+                    ->aboveContent(new HtmlString('<div class="text-xs text-blue-600">Im Text können <b>Vornamen</b>, <b>Nachnamen</b> und <b>Herr/Frau</b> des Empfänger/der Empfängerin mit den Platzhaltern ###vorname###, ###nachname### und ###geschlecht### ersetzen werden. <br><br></div>'))
+                    ->toolbarButtons([
+                        ['bold', 'italic', 'underline', 'strike', 'code', 'small', 'highlight'],
+                        ['undo', 'redo'],
+                    ]),
+                RichEditor::make('unterschrift')
+                    ->toolbarButtons([
+                        ['bold', 'italic'],
+                        ['undo', 'redo'],
+                    ]),
+            ])->columns(1);
+    }
+}

app/Filament/Clusters/Newsletter/MailVorlages/Tables/MailVorlagesTable.php

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+<?php
+
+namespace App\Filament\Clusters\Newsletter\MailVorlages\Tables;
+
+use App\Models\MailVorlage;
+use Filament\Actions\DeleteAction;
+use Filament\Actions\EditAction;
+use Filament\Forms\Components\Select;
+use Filament\Support\Enums\TextSize;
+use Filament\Tables\Columns\Layout\Split;
+use Filament\Tables\Columns\Layout\Stack;
+use Filament\Tables\Columns\TextColumn;
+use Filament\Tables\Enums\FiltersLayout;
+use Filament\Tables\Filters\Filter;
+use Filament\Tables\Table;
+use Illuminate\Database\Eloquent\Builder;
+
+class MailVorlagesTable
+{
+    public static function configure(Table $table): Table
+    {
+        return $table
+            ->columns([
+                Split::make([
+                    Stack::make([
+                        TextColumn::make('subjekt')
+                            ->size(TextSize::Medium),
+                        TextColumn::make('inhalt')
+                            ->label('E-Mail Vorlage')
+                            ->extraAttributes(['class' => 'tiptap'])
+                            ->markdown()
+                            ->wrap(),
+                        TextColumn::make('unterschrift')
+                            ->markdown(),
+                    ])->space(10),
+                ]),
+            ])
+            ->paginated(false)
+            ->filters([
+                Filter::make('vorlagen_id')
+                    ->schema([
+                        Select::make('vorlagen_id')
+                            ->searchable()
+                            ->hiddenLabel()
+                            ->preload()
+                            ->default(1)
+                            ->selectablePlaceholder(false)
+                            ->options(function (): array {
+                                return MailVorlage::pluck('titel', 'id')->toArray();
+                            }),
+                    ])
+                    ->query(function (Builder $query, array $data): Builder {
+                        return $query
+                            ->when(
+                                $data['vorlagen_id'],
+                                fn (Builder $query, $vorlagen_id): Builder => $query->where('id', $vorlagen_id),
+                            );
+                    }),
+
+            ], layout: FiltersLayout::AboveContent)
+            ->persistFiltersInSession()
+            ->filtersResetActionPosition(null)
+            ->hiddenFilterIndicators()
+            ->deferFilters(false)
+            ->recordActions([
+                EditAction::make()->iconButton(),
+                DeleteAction::make()->iconButton(),
+            ]);
+    }
+}