Enable editing of supplier products and listing services connected to them

app/Models/SupplierDetail.php

@@ -3,7 +3,9 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
 
+use App\Models\Supplier\{Broadband,Generic,Phone,Type};
 use App\Traits\SiteID;
 
 class SupplierDetail extends Model
@@ -14,8 +16,50 @@ class SupplierDetail extends Model
 
 	/* RELATIONS */
 
+	public function broadbands()
+	{
+		return $this->hasMany(Broadband::class);
+	}
+
+	public function generics()
+	{
+		return $this->hasMany(Generic::class);
+	}
+
+	public function phones()
+	{
+		return $this->hasMany(Phone::class);
+	}
+
 	public function supplier()
 	{
 		return $this->belongsTo(Supplier::class);
 	}
+
+	/* METHODS */
+
+	/**
+	 * Find a supplier product of a particular type
+	 *
+	 * @param string $type
+	 * @param int $id
+	 * @return Type
+	 * @throws \Exception
+	 */
+	public function find(string $type,int $id): Type
+	{
+		switch ($type) {
+			case 'broadband':
+				$item =  $this->broadbands->where('id',$id);
+				break;
+
+			default:
+				throw new \Exception('Unknown type: '.$type);
+		}
+
+		if ($item->count() !== 1)
+			throw new ModelNotFoundException(sprintf('Unknown Model of type [%s] with id [%d]',$type,$id));
+
+		return $item->pop();
+	}
 }