first commit

app/Models/ProjectGroup.php

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+<?php
+
+namespace App\Models;
+
+use App\Scopes\ProjectAccessScope;
+use App\Traits\ExposePermissions;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Kalnoy\Nestedset\AncestorsRelation;
+use Kalnoy\Nestedset\DescendantsRelation;
+use Kalnoy\Nestedset\NodeTrait;
+use Kalnoy\Nestedset\QueryBuilder;
+
+/**
+ * @method static QueryBuilder withDepth()
+ */
+class ProjectGroup extends Model
+{
+    use SoftDeletes;
+    use HasFactory;
+    use ExposePermissions;
+    use NodeTrait;
+
+    protected $fillable = [
+        'name',
+    ];
+
+    protected $dates = [
+        'deleted_at',
+        'created_at',
+        'updated_at',
+    ];
+
+    protected const PERMISSIONS = ['update', 'destroy'];
+
+    public function groupParentsWithProjectsCount(): AncestorsRelation
+    {
+        return $this->ancestors()->withCount('projects')->defaultOrder();
+    }
+
+    public function groupParent(): HasOne
+    {
+        return $this->hasOne(ProjectGroup::class, 'id', 'parent_id');
+    }
+
+    public function descendantsWithDepthAndProjectsCount(): DescendantsRelation
+    {
+        return $this->descendants()->withCount('projects')->withDepth()->defaultOrder();
+    }
+
+    protected static function boot(): void
+    {
+        parent::boot();
+    }
+
+    public function projects(): HasMany
+    {
+        return $this->hasMany(Project::class, 'group');
+    }
+}