GroupName.php
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GroupName.php
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	<?php

	namespace App\Rules;

	use Illuminate\Contracts\Validation\Rule;
	use Illuminate\Support\Facades\Validator;
	use Illuminate\Support\Str;

	class GroupName implements Rule
	{
	private $message;
	private $owner;
	private $domain;

	/**
	* Class constructor.
	*
	* @param \App\User $owner The account owner
	* @param string $domain The domain name of the group
	*/
	public function __construct($owner, $domain)
	{
	$this->owner = $owner;
	$this->domain = Str::lower($domain);
	}

	/**
	* Determine if the validation rule passes.
	*
	* @param string $attribute Attribute name
	* @param mixed $name The value to validate
	*
	* @return bool
	*/
	public function passes($attribute, $name): bool
	{
	if (empty($name) \|\| !is_string($name)) {
	$this->message = \trans('validation.nameinvalid');
	return false;
	}

	// Check the max length, according to the database column length
	if (strlen($name) > 191) {
	$this->message = \trans('validation.max.string', ['max' => 191]);
	return false;
	}

	// Check if the name is unique in the domain
	// FIXME: Maybe just using the whole groups table would be faster than groups()?
	$exists = $this->owner->groups()
	->where('name', $name)
	->where('email', 'like', '%@' . $this->domain)
	->exists();

	if ($exists) {
	$this->message = \trans('validation.nameexists');
	return false;
	}

	return true;
	}

	/**
	* Get the validation error message.
	*
	* @return string
	*/
	public function message(): ?string
	{
	return $this->message;
	}
	}