63 lines
1.6 KiB
PHP
63 lines
1.6 KiB
PHP
<?php
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/**
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* Copyright 1999-2021 iFLYTEK Corporation
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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 IFlytek\Xfyun\Speech\Helper;
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use IFlytek\Xfyun\Speech\Constants\LfasrConstants;
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/**
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* 转写切片ID生成类
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*
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* @author guizheng@iflytek.com
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*/
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class SliceIdGenerator
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{
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/**
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* @var string 当前切片ID
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*/
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private $id;
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public function __construct()
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{
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$this->id = LfasrConstants::ORIGIN_SLICE_ID;
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}
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/**
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* 返回当前切片ID，并生成下一个切片ID，赋值给对象的当前ID
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*
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* @return string
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*/
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public function getId()
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{
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$currentId = $this->id;
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$nextId = $currentId;
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$pos = strlen($currentId) - 1;
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while ($pos >= 0) {
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$charAtPos = $nextId[$pos];
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if ($charAtPos != 'z') {
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$nextId = substr($nextId, 0, $pos) . chr((ord($charAtPos) + 1)) . substr($nextId, $pos + 1);
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break;
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} else {
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$nextId = substr($nextId, 0, $pos) . 'a';
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$pos = $pos - 1;
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}
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}
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$this->id = $nextId;
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return $currentId;
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}
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}
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