AliasesTrait.php
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AliasesTrait.php
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	<?php

	namespace App\Traits;

	trait AliasesTrait
	{
	/**
	* Email aliases of this object.
	*
	* @return \Illuminate\Database\Eloquent\Relations\HasMany
	*/
	public function aliases()
	{
	return $this->hasMany(static::class . 'Alias');
	}

	/**
	* Find whether an email address exists as an alias
	*
	* @param string $email Email address
	*
	* @return bool True if found, False otherwise
	*/
	public static function aliasExists(string $email): bool
	{
	if (strpos($email, '@') === false) {
	return false;
	}

	$email = \App\Utils::emailToLower($email);
	$class = static::class . 'Alias';

	return $class::where('alias', $email)->count() > 0;
	}

	/**
	* A helper to update object's aliases list.
	*
	* Example Usage:
	*
	* ```php
	* $user = User::firstOrCreate(['email' => 'some@other.org']);
	* $user->setAliases(['alias1@other.org', 'alias2@other.org']);
	* ```
	*
	* @param array $aliases An array of email addresses
	*
	* @return void
	*/
	public function setAliases(array $aliases): void
	{
	$aliases = array_map('\App\Utils::emailToLower', $aliases);
	$aliases = array_unique($aliases);

	$existing_aliases = [];

	foreach ($this->aliases()->get() as $alias) {
	/** @var \App\UserAlias\|\App\SharedFolderAlias $alias */
	if (!in_array($alias->alias, $aliases)) {
	$alias->delete();
	} else {
	$existing_aliases[] = $alias->alias;
	}
	}
	foreach (array_diff($aliases, $existing_aliases) as $alias) {
	$this->aliases()->create(['alias' => $alias]);
	}
	}
	}