team members and invitations

app/Models/ProjectInvitation.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Str;
+
+class ProjectInvitation extends Model
+{
+    protected $fillable = [
+        'project_id',
+        'invited_by',
+        'email',
+        'role',
+        'token',
+        'expires_at',
+        'accepted_at',
+    ];
+
+    protected $casts = [
+        'expires_at' => 'datetime',
+        'accepted_at' => 'datetime',
+    ];
+
+    protected static function booted(): void
+    {
+        static::creating(function (ProjectInvitation $invitation) {
+            $invitation->token ??= Str::random(32);
+            $invitation->expires_at ??= now()->addDays(7);
+        });
+    }
+
+    public function project(): BelongsTo
+    {
+        return $this->belongsTo(Project::class);
+    }
+
+    public function inviter(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'invited_by');
+    }
+
+    public function isExpired(): bool
+    {
+        return $this->expires_at->isPast();
+    }
+
+    public function isPending(): bool
+    {
+        return !$this->accepted_at && !$this->isExpired();
+    }
+
+    public function accept(User $user): void
+    {
+        if ($this->isExpired()) {
+            throw new \RuntimeException('Invitation has expired');
+        }
+
+        if ($this->accepted_at) {
+            throw new \RuntimeException('Invitation has already been accepted');
+        }
+
+        $this->project->users()->attach($user->id, ['role' => $this->role]);
+        $this->update(['accepted_at' => now()]);
+    }
+}