Script erstellt

app/Http/Controllers/AdminController.php

@@ -0,0 +1,212 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\User;
+use App\Models\NailPolish;
+use App\Models\Manufacturer;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Hash;
+use Illuminate\Support\Facades\Mail;
+
+class AdminController extends Controller
+{
+    /**
+     * Dashboard für Administratoren
+     */
+    public function dashboard()
+    {
+        $totalUsers = User::count();
+        $totalNailPolishes = NailPolish::count();
+        $totalManufacturers = Manufacturer::count();
+        $recentUsers = User::latest()->take(5)->get();
+        $recentNailPolishes = NailPolish::latest()->take(5)->get();
+        $recentManufacturers = Manufacturer::latest()->take(5)->get();
+        
+        return view("admin.dashboard", compact("totalUsers", "totalNailPolishes", "totalManufacturers", "recentUsers", "recentNailPolishes", "recentManufacturers"));
+    }
+
+    /**
+     * Liste aller Benutzer
+     */
+    public function users(Request $request)
+    {
+        $search = $request->get("search");
+        
+        $users = User::when($search, function($query) use ($search) {
+            return $query->where("name", "like", "%{$search}%")
+                        ->orWhere("email", "like", "%{$search}%");
+        })->orderBy("name")->paginate(20);
+        
+        return view("admin.users.index", compact("users", "search"));
+    }
+
+    /**
+     * Formular zum Erstellen eines neuen Benutzers
+     */
+    public function createUser()
+    {
+        return view("admin.users.create");
+    }
+
+    /**
+     * Neuen Benutzer speichern
+     */
+    public function storeUser(Request $request)
+    {
+        $request->validate([
+            "name" => "required|string|max:255",
+            "email" => "required|string|email|max:255|unique:users",
+            "password" => "required|string|min:8|confirmed",
+        ]);
+
+        // Passwort für E-Mail speichern (wird nach dem Speichern gelöscht)
+        $plainPassword = $request->password;
+
+        // User erstellen
+        $user = User::create([
+            "name" => $request->name,
+            "email" => $request->email,
+            "password" => Hash::make($request->password),
+            "is_admin" => $request->has("is_admin"),
+        ]);
+
+        // Willkommens-E-Mail senden
+        try {
+            Mail::send("emails.welcome-user", [
+                "user" => $user,
+                "password" => $plainPassword
+            ], function($message) use ($user) {
+                $message->to($user->email, $user->name)
+                        ->subject("🎨 Willkommen bei der NeoNail DB - Ihre Login-Daten")
+                        ->from(config("mail.from.address"), config("mail.from.name"));
+            });
+
+            // Admin-Bestätigung senden
+            Mail::raw("Hallo Admin!
+
+Ein neuer User wurde erfolgreich erstellt und eine Willkommens-E-Mail gesendet.
+
+📋 User-Details:
+   - Name: {$user->name}
+   - E-Mail: {$user->email}
+   - Admin-Status: " . ($user->isAdmin() ? "Ja" : "Nein") . "
+   - Erstellt: " . now() . "
+
+Die Willkommens-E-Mail enthält:
+   - Login-Daten (Website, E-Mail, Passwort)
+   - Aufforderung zum Passwort-Ändern
+   - Feature-Übersicht
+   - Direkte Links zur Anwendung
+
+Viele Grüße,
+NeoNail DB System", function($message) {
+                $message->to("oliver@vogt.de.com", "Admin")
+                        ->subject("✅ NeoNail DB - Neuer User erstellt")
+                        ->from(config("mail.from.address"), config("mail.from.name"));
+            });
+
+            $successMessage = "Benutzer erfolgreich erstellt! Willkommens-E-Mail wurde gesendet.";
+            
+        } catch (\Exception $e) {
+            // User wurde erstellt, aber E-Mail fehlgeschlagen
+            \Log::error("Fehler beim Senden der Willkommens-E-Mail: " . $e->getMessage());
+            $successMessage = "Benutzer erfolgreich erstellt! E-Mail konnte nicht gesendet werden.";
+        }
+
+        return redirect()->route("admin.users.index")
+            ->with("success", $successMessage);
+    }
+
+    /**
+     * Formular zum Bearbeiten eines Benutzers
+     */
+    public function editUser(User $user)
+    {
+        return view("admin.users.edit", compact("user"));
+    }
+
+    /**
+     * Benutzer aktualisieren
+     */
+    public function updateUser(Request $request, User $user)
+    {
+        $request->validate([
+            "name" => "required|string|max:255",
+            "email" => "required|string|email|max:255|unique:users,email," . $user->id,
+            "password" => "nullable|string|min:8|confirmed",
+        ]);
+
+        $user->name = $request->name;
+        $user->email = $request->email;
+        $user->is_admin = $request->has("is_admin");
+        
+        if ($request->filled("password")) {
+            $user->password = Hash::make($request->password);
+        }
+        
+        $user->save();
+
+        return redirect()->route("admin.users.index")
+            ->with("success", "Benutzer erfolgreich aktualisiert!");
+    }
+
+    /**
+     * Benutzer löschen
+     */
+    public function destroyUser(User $user)
+    {
+        $userName = $user->name;
+        $userEmail = $user->email;
+        
+        $user->delete();
+
+        // Admin-Benachrichtigung über gelöschten User
+        try {
+            Mail::raw("Hallo Admin!
+
+Ein User wurde erfolgreich gelöscht.
+
+📋 Gelöschter User:
+   - Name: {$userName}
+   - E-Mail: {$userEmail}
+   - Gelöscht: " . now() . "
+
+Viele Grüße,
+NeoNail DB System", function($message) {
+                $message->to("oliver@vogt.de.com", "Admin")
+                        ->subject("🗑️ NeoNail DB - User gelöscht")
+                        ->from(config("mail.from.address"), config("mail.from.name"));
+            });
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Senden der Lösch-Benachrichtigung: " . $e->getMessage());
+        }
+
+        return redirect()->route("admin.users.index")
+            ->with("success", "Benutzer erfolgreich gelöscht!");
+    }
+
+    /**
+     * Statistiken anzeigen
+     */
+    public function statistics()
+    {
+        $totalUsers = User::count();
+        $totalNailPolishes = NailPolish::count();
+        $usersWithCollections = User::has("nailPolishes")->count();
+        $averageCollectionSize = User::withCount("nailPolishes")->avg("nail_polishes_count");
+        
+        $topUsers = User::withCount("nailPolishes")
+            ->orderBy("nail_polishes_count", "desc")
+            ->take(10)
+            ->get();
+        
+        return view("admin.statistics", compact(
+            "totalUsers", 
+            "totalNailPolishes", 
+            "usersWithCollections", 
+            "averageCollectionSize",
+            "topUsers"
+        ));
+    }
+}

app/Http/Controllers/Auth/LoginController.php

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+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+
+class LoginController extends Controller
+{
+    public function showLoginForm()
+    {
+        return view('auth.login');
+    }
+
+    public function login(Request $request)
+    {
+        $credentials = $request->validate([
+            'email' => ['required', 'email'],
+            'password' => ['required'],
+        ]);
+
+        if (Auth::attempt($credentials, $request->boolean('remember'))) {
+            $request->session()->regenerate();
+
+            return redirect()->intended(route('user-nail-polishes.index'));
+        }
+
+        return back()->withErrors([
+            'email' => 'Die angegebenen Anmeldedaten stimmen nicht überein.',
+        ])->onlyInput('email');
+    }
+
+    public function logout(Request $request)
+    {
+        Auth::logout();
+
+        $request->session()->invalidate();
+        $request->session()->regenerateToken();
+
+        return redirect('/');
+    }
+}

app/Http/Controllers/Controller.php

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+<?php
+
+namespace App\Http\Controllers;
+
+abstract class Controller
+{
+    //
+}

app/Http/Controllers/ManufacturerController.php

@@ -0,0 +1,154 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Manufacturer;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+
+class ManufacturerController extends Controller
+{
+    /**
+     * Zeigt alle Hersteller an
+     */
+    public function index(Request $request)
+    {
+        $search = $request->get('search');
+        
+        $query = Manufacturer::withCount('nailPolishes');
+        
+        if ($search) {
+            $query->search($search);
+        }
+        
+        $manufacturers = $query->orderBy('name')->paginate(20);
+        
+        return view('manufacturers.index', compact('manufacturers', 'search'));
+    }
+
+    /**
+     * Zeigt das Formular zum Erstellen eines neuen Herstellers
+     */
+    public function create()
+    {
+        return view('manufacturers.create');
+    }
+
+    /**
+     * Speichert einen neuen Hersteller
+     */
+    public function store(Request $request)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255|unique:manufacturers',
+            'description' => 'nullable|string|max:1000',
+            'website' => 'nullable|url|max:255',
+            'country' => 'nullable|string|max:100',
+        ]);
+
+        try {
+            $manufacturer = Manufacturer::create([
+                'name' => $request->name,
+                'description' => $request->description,
+                'website' => $request->website,
+                'country' => $request->country,
+            ]);
+
+            return redirect()->route('manufacturers.index')
+                           ->with('success', "Hersteller '{$manufacturer->name}' wurde erfolgreich erstellt!");
+
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Erstellen des Herstellers: " . $e->getMessage());
+            return back()->with('error', 'Fehler beim Erstellen des Herstellers. Bitte versuchen Sie es erneut.')
+                        ->withInput();
+        }
+    }
+
+    /**
+     * Zeigt einen Hersteller an
+     */
+    public function show(Manufacturer $manufacturer)
+    {
+        $manufacturer->load(['nailPolishes' => function($query) {
+            $query->orderBy('name');
+        }]);
+        
+        return view('manufacturers.show', compact('manufacturer'));
+    }
+
+    /**
+     * Zeigt das Formular zum Bearbeiten eines Herstellers
+     */
+    public function edit(Manufacturer $manufacturer)
+    {
+        return view('manufacturers.edit', compact('manufacturer'));
+    }
+
+    /**
+     * Aktualisiert einen Hersteller
+     */
+    public function update(Request $request, Manufacturer $manufacturer)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255|unique:manufacturers,name,' . $manufacturer->id,
+            'description' => 'nullable|string|max:1000',
+            'website' => 'nullable|url|max:255',
+            'country' => 'nullable|string|max:100',
+        ]);
+
+        try {
+            $manufacturer->update([
+                'name' => $request->name,
+                'description' => $request->description,
+                'website' => $request->website,
+                'country' => $request->country,
+            ]);
+
+            return redirect()->route('manufacturers.index')
+                           ->with('success', "Hersteller '{$manufacturer->name}' wurde erfolgreich aktualisiert!");
+
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Aktualisieren des Herstellers: " . $e->getMessage());
+            return back()->with('error', 'Fehler beim Aktualisieren des Herstellers. Bitte versuchen Sie es erneut.')
+                        ->withInput();
+        }
+    }
+
+    /**
+     * Löscht einen Hersteller
+     */
+    public function destroy(Manufacturer $manufacturer)
+    {
+        try {
+            // Prüfe, ob der Hersteller noch Nagellacke hat
+            if ($manufacturer->hasNailPolishes()) {
+                return back()->with('error', "Hersteller '{$manufacturer->name}' kann nicht gelöscht werden, da noch Nagellacke zugeordnet sind.");
+            }
+
+            $name = $manufacturer->name;
+            $manufacturer->delete();
+
+            return redirect()->route('manufacturers.index')
+                           ->with('success', "Hersteller '{$name}' wurde erfolgreich gelöscht!");
+
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Löschen des Herstellers: " . $e->getMessage());
+            return back()->with('error', 'Fehler beim Löschen des Herstellers. Bitte versuchen Sie es erneut.');
+        }
+    }
+
+    /**
+     * API-Endpoint für AJAX-Suche nach Herstellern
+     */
+    public function search(Request $request)
+    {
+        $search = $request->get('q');
+        
+        $manufacturers = Manufacturer::where('name', 'like', "%{$search}%")
+                                   ->orderBy('name')
+                                   ->limit(10)
+                                   ->get(['id', 'name']);
+        
+        return response()->json($manufacturers);
+    }
+}

app/Http/Controllers/NailPolishController.php

@@ -0,0 +1,165 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\NailPolish;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Storage;
+use Intervention\Image\Facades\Image;
+
+class NailPolishController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index(Request $request)
+    {
+        $search = $request->get('search');
+        
+        $nailPolishes = NailPolish::when($search, function($query) use ($search) {
+            return $query->search($search);
+        })->orderBy('name')->paginate(20);
+        
+        return view('nail-polishes.index', compact('nailPolishes', 'search'));
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        return view('nail-polishes.create');
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255',
+            'number' => 'required|string|max:50|unique:nail_polishes',
+            'image' => 'nullable|image|mimes:jpeg,png,jpg,gif|max:2048'
+        ]);
+
+        $nailPolish = new NailPolish();
+        $nailPolish->name = $request->name;
+        $nailPolish->number = $request->number;
+
+        if ($request->hasFile('image')) {
+            $image = $request->file('image');
+            $filename = time() . '_' . $image->getClientOriginalName();
+            
+            // Bild optimieren und speichern
+            $optimizedImage = Image::make($image)
+                ->resize(300, 300, function ($constraint) {
+                    $constraint->aspectRatio();
+                    $constraint->upsize();
+                })
+                ->encode('jpg', 80);
+            
+            Storage::disk('public')->put('nail-polishes/' . $filename, $optimizedImage);
+            $nailPolish->image_path = 'nail-polishes/' . $filename;
+        }
+
+        $nailPolish->save();
+
+        return redirect()->route('nail-polishes.index')
+            ->with('success', 'Nagellack erfolgreich hinzugefügt!');
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(NailPolish $nailPolish)
+    {
+        return view('nail-polishes.show', compact('nailPolish'));
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(NailPolish $nailPolish)
+    {
+        return view('nail-polishes.edit', compact('nailPolish'));
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, NailPolish $nailPolish)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255',
+            'number' => 'required|string|max:50|unique:nail_polishes,number,' . $nailPolish->id,
+            'image' => 'nullable|image|mimes:jpeg,png,jpg,gif|max:2048'
+        ]);
+
+        $nailPolish->name = $request->name;
+        $nailPolish->number = $request->number;
+
+        if ($request->hasFile('image')) {
+            // Altes Bild löschen
+            if ($nailPolish->image_path) {
+                Storage::disk('public')->delete($nailPolish->image_path);
+            }
+
+            $image = $request->file('image');
+            $filename = time() . '_' . $image->getClientOriginalName();
+            
+            // Bild optimieren und speichern
+            $optimizedImage = Image::make($image)
+                ->resize(300, 300, function ($constraint) {
+                    $constraint->aspectRatio();
+                    $constraint->upsize();
+                })
+                ->encode('jpg', 80);
+            
+            Storage::disk('public')->put('nail-polishes/' . $filename, $optimizedImage);
+            $nailPolish->image_path = 'nail-polishes/' . $filename;
+        }
+
+        $nailPolish->save();
+
+        return redirect()->route('nail-polishes.index')
+            ->with('success', 'Nagellack erfolgreich aktualisiert!');
+    }
+
+    /**
+     * Löscht einen Nagellack
+     */
+    public function destroy(NailPolish $nailPolish)
+    {
+        try {
+            // Prüfe, ob der Lack von anderen Usern verwendet wird
+            $usersWithThisPolish = $nailPolish->users()->count();
+            
+            if ($usersWithThisPolish > 0) {
+                return back()->with('error', "Dieser Lack kann nicht gelöscht werden, da er von {$usersWithThisPolish} Benutzer(n) in ihrer Sammlung verwendet wird. Bitte entfernen Sie ihn zuerst aus allen Sammlungen.");
+            }
+            
+            // Lösche das Bild, falls vorhanden
+            if ($nailPolish->image_path && Storage::disk('public')->exists($nailPolish->image_path)) {
+                Storage::disk('public')->delete($nailPolish->image_path);
+            }
+            
+            $nailPolish->delete();
+            
+            return redirect()->route('nail-polishes.index')
+                ->with('success', "Lack '{$nailPolish->name}' wurde erfolgreich gelöscht!");
+                
+        } catch (\Exception $e) {
+            return back()->with('error', 'Fehler beim Löschen des Lackes: ' . $e->getMessage());
+        }
+    }
+
+    /**
+     * Zeigt an, welche User einen bestimmten Lack haben
+     */
+    public function showUsers(NailPolish $nailPolish)
+    {
+        $users = $nailPolish->users()->paginate(20);
+        
+        return view('nail-polishes.show-users', compact('nailPolish', 'users'));
+    }
+}

app/Http/Controllers/UserNailPolishController.php

@@ -0,0 +1,186 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\NailPolish;
+use App\Models\User;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Storage;
+
+class UserNailPolishController extends Controller
+{
+    /**
+     * Zeigt die Sammlung des aktuellen Benutzers an
+     */
+    public function index(Request $request)
+    {
+        $user = Auth::user();
+        $search = $request->get("search");
+        
+        $query = $user->nailPolishes();
+        
+        if ($search) {
+            $query->where(function($q) use ($search) {
+                $q->where("name", "like", "%{$search}%")
+                  ->orWhere("number", "like", "%{$search}%");
+            });
+        }
+        
+        $nailPolishes = $query->orderBy("name")->paginate(12);
+        
+        return view("user-nail-polishes.index", compact("nailPolishes", "search"));
+    }
+
+    /**
+     * Zeigt alle verfügbaren Lacke an, die der User noch nicht hat
+     */
+    public function available(Request $request)
+    {
+        $user = Auth::user();
+        $search = $request->get("search");
+        
+        $query = NailPolish::whereNotIn("id", $user->nailPolishes()->pluck("nail_polishes.id"));
+        
+        if ($search) {
+            $query->search($search);
+        }
+        
+        $nailPolishes = $query->orderBy("name")->paginate(12);
+        
+        return view("user-nail-polishes.available", compact("nailPolishes", "search"));
+    }
+
+    /**
+     * Fügt einen Lack zur Sammlung des Users hinzu
+     */
+    public function add(NailPolish $nailPolish)
+    {
+        $user = Auth::user();
+        
+        // Prüfe, ob der Lack bereits in der Sammlung ist
+        if ($user->nailPolishes()->where("nail_polish_id", $nailPolish->id)->exists()) {
+            return back()->with("warning", "Dieser Lack ist bereits in Ihrer Sammlung!");
+        }
+        
+        $user->nailPolishes()->attach($nailPolish->id);
+        
+        return back()->with("success", "Lack \"{$nailPolish->name}\" wurde zu Ihrer Sammlung hinzugefügt!");
+    }
+
+    /**
+     * Entfernt einen Lack aus der Sammlung des Users
+     */
+    public function remove(NailPolish $nailPolish)
+    {
+        try {
+            $user = Auth::user();
+            
+            // Prüfe, ob der Lack in der Sammlung ist
+            if (!$user->nailPolishes()->where("nail_polish_id", $nailPolish->id)->exists()) {
+                return back()->with("warning", "Dieser Lack ist nicht in Ihrer Sammlung!");
+            }
+            
+            $user->nailPolishes()->detach($nailPolish->id);
+            
+            return back()->with("success", "Lack \"{$nailPolish->name}\" wurde aus Ihrer Sammlung entfernt!");
+            
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Entfernen des Lackes: " . $e->getMessage());
+            return back()->with("error", "Fehler beim Entfernen des Lackes. Bitte versuchen Sie es erneut.");
+        }
+    }
+
+    /**
+     * Zeigt das Formular zum Erstellen eines neuen Lackes
+     */
+    public function create()
+    {
+        return view("user-nail-polishes.create");
+    }
+
+    /**
+     * Speichert einen neuen Lack (wird automatisch zum Hauptkatalog hinzugefügt)
+     */
+    public function store(Request $request)
+    {
+        $request->validate([
+            "name" => "required|string|max:255",
+            "number" => "required|string|max:50",
+            "manufacturer_id" => "required_without:new_manufacturer|exists:manufacturers,id",
+            "new_manufacturer" => "required_without:manufacturer_id|string|max:255|unique:manufacturers,name",
+            "image" => "nullable|image|max:10240", // Max 10MB
+        ], [
+            "name.required" => "Der Name des Lackes ist erforderlich.",
+            "number.required" => "Die Nummer des Lackes ist erforderlich.",
+            "manufacturer_id.required_without" => "Bitte wählen Sie einen Hersteller aus oder erstellen Sie einen neuen.",
+            "new_manufacturer.required_without" => "Bitte wählen Sie einen Hersteller aus oder erstellen Sie einen neuen.",
+            "new_manufacturer.unique" => "Ein Hersteller mit diesem Namen existiert bereits.",
+            "image.image" => "Die Datei muss ein Bild sein.",
+            "image.max" => "Das Bild darf maximal 10MB groß sein.",
+        ]);
+
+        try {
+            // Hersteller verarbeiten
+            $manufacturerId = null;
+            if ($request->filled('new_manufacturer')) {
+                // Neuen Hersteller erstellen
+                $manufacturer = \App\Models\Manufacturer::create([
+                    'name' => trim($request->new_manufacturer),
+                ]);
+                $manufacturerId = $manufacturer->id;
+            } else {
+                $manufacturerId = $request->manufacturer_id;
+            }
+
+            $nailPolish = new NailPolish();
+            $nailPolish->name = trim($request->name);
+            $nailPolish->number = trim($request->number);
+            $nailPolish->manufacturer_id = $manufacturerId;
+            
+            // Vereinfachte Bildverarbeitung ohne Intervention Image
+            if ($request->hasFile("image") && $request->file("image")->isValid()) {
+                $image = $request->file("image");
+                
+                // Erstelle einen eindeutigen Dateinamen
+                $filename = "nail_polish_" . time() . "_" . uniqid() . "." . $image->getClientOriginalExtension();
+                $path = "nail_polishes/" . $filename;
+                
+                // Speichere das Bild direkt ohne Verarbeitung
+                Storage::disk("public")->putFileAs("nail_polishes", $image, $filename);
+                $nailPolish->image_path = $path;
+                
+                \Log::info("Bild erfolgreich gespeichert: " . $path);
+            }
+            
+            $nailPolish->save();
+            
+            // Füge den Lack automatisch zur Sammlung des Users hinzu
+            $user = Auth::user();
+            $user->nailPolishes()->attach($nailPolish->id);
+            
+            $successMessage = "Lack \"{$nailPolish->name}\" wurde erfolgreich erstellt und zu Ihrer Sammlung hinzugefügt!";
+            if ($request->filled('new_manufacturer')) {
+                $successMessage .= " Neuer Hersteller \"{$request->new_manufacturer}\" wurde ebenfalls erstellt.";
+            }
+            
+            return redirect()->route("user-nail-polishes.index")
+                ->with("success", $successMessage);
+                
+        } catch (\Exception $e) {
+            \Log::error("Fehler beim Erstellen des Lackes: " . $e->getMessage());
+            return back()->with("error", "Fehler beim Erstellen des Lackes: " . $e->getMessage())
+                ->withInput();
+        }
+    }
+
+    /**
+     * Zeigt die Sammlung eines bestimmten Users (für Admin)
+     */
+    public function showUserCollection(User $user)
+    {
+        $nailPolishes = $user->nailPolishes()->orderBy("name")->paginate(12);
+        
+        return view("user-nail-polishes.show-user", compact("user", "nailPolishes"));
+    }
+}

app/Http/Middleware/AdminMiddleware.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class AdminMiddleware
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        // Admin-Berechtigung mit is_admin Spalte
+        if (!auth()->check() || !auth()->user()->isAdmin()) {
+            abort(403, 'Zugriff verweigert. Admin-Berechtigung erforderlich.');
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/Authenticate.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Symfony\Component\HttpFoundation\Response;
+
+class Authenticate
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next, string ...$guards): Response
+    {
+        $guards = empty($guards) ? [null] : $guards;
+
+        foreach ($guards as $guard) {
+            if (!Auth::guard($guard)->check()) {
+                return redirect()->route('login');
+            }
+        }
+
+        return $next($request);
+    }
+}

app/Http/Middleware/RedirectIfAuthenticated.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Symfony\Component\HttpFoundation\Response;
+
+class RedirectIfAuthenticated
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
+     */
+    public function handle(Request $request, Closure $next, string ...$guards): Response
+    {
+        $guards = empty($guards) ? [null] : $guards;
+
+        foreach ($guards as $guard) {
+            if (Auth::guard($guard)->check()) {
+                return redirect()->route('user-nail-polishes.index');
+            }
+        }
+
+        return $next($request);
+    }
+}