79 lines
2.1 KiB
PHP
79 lines
2.1 KiB
PHP
<?php
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/*
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* Copyright 2011 Johannes M. Schmitt <schmittjoh@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace JMS\DiExtraBundle\Generator;
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class NameGenerator
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{
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private $count = 0;
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private $firstChars = 'abcdefghijklmnopqrstuvwxyz';
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private $firstCharsLength = 26;
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private $nonFirstChars = 'abcdefghijklmnopqrstuvwxyz0123456789_';
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private $nonFirstCharsLength = 37;
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private $reservedNames = array();
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public function addReservedName($name)
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{
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$this->reservedNames[$name] = true;
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}
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public function setFirstChars($chars)
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{
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$this->firstChars = $chars;
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$this->firstCharsLength = strlen($chars);
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}
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public function setNonFirstChars($chars)
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{
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$this->nonFirstChars = $chars;
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$this->nonFirstCharsLength = strlen($chars);
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}
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public function reset()
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{
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$this->count = 0;
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}
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public function nextName()
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{
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while (true) {
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$name = '';
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$i = $this->count;
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if ('' === $name) {
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$name .= $this->firstChars[$i%$this->firstCharsLength];
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$i = intval($i/$this->firstCharsLength);
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}
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while ($i > 0) {
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$i -= 1;
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$name .= $this->nonFirstChars[$i%$this->nonFirstCharsLength];
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$i = intval($i/$this->nonFirstCharsLength);
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}
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$this->count += 1;
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// check that the name is not reserved
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if (isset($this->reservedNames[$name])) {
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continue;
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}
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return $name;
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}
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}
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} |