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<?php |
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/** |
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* Pterodactyl - Panel |
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* Copyright (c) 2015 - 2017 Dane Everitt <[email protected]>. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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namespace Pterodactyl\Services; |
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use DB; |
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use Uuid; |
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class UuidService |
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{ |
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/** |
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* Generate a unique UUID validating against specified table and column. |
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* Defaults to `users.uuid`. |
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* |
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* @param string $table |
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* @param string $field |
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* @param int $type |
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* @return string |
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*/ |
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public function generate($table = 'users', $field = 'uuid', $type = 4) |
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{ |
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$return = false; |
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do { |
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$uuid = Uuid::generate($type); |
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if (! DB::table($table)->where($field, $uuid)->exists()) { |
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$return = $uuid; |
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} |
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} while (! $return); |
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return (string) $return; |
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} |
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/** |
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* Generates a ShortUUID code which is 8 characters long and is used for identifying servers in the system. |
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* |
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* @param string $table |
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* @param string $field |
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* @param null|string $attachedUuid |
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* @return string |
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*/ |
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public function generateShort($table = 'servers', $field = 'uuidShort', $attachedUuid = null) |
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{ |
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$return = false; |
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do { |
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$short = (is_null($attachedUuid)) ? substr(Uuid::generate(4), 0, 8) : substr($attachedUuid, 0, 8); |
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$attachedUuid = null; |
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if (! DB::table($table)->where($field, $short)->exists()) { |
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$return = $short; |
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} |
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} while (! $return); |
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return (string) $return; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: