fix: 修复部分歌词翻译内容在拼接时可能会遗漏的问题

由于翻译歌词的时间标签与原文歌词存在误差所导致；
优化部分代码，移除正则表达式的使用

src/qqHandler.php

@@ -1,5 +1,5 @@
 <?php
-require('common.php');
+require('qqTranslation.php');
 
 class AumQQHandler {
     public static $siteSearch = 'https://c.y.qq.com/soso/fcgi-bin/client_search_cp?aggr=1&format=json&cr=1&flag_qc=0&p=1&n=30&w=';
@@ -26,13 +26,13 @@ public static function getContent($url, $defaultValue) {
         if ($result === false) {
             return $defaultValue;
         } else {
-            return AumQQHandler::getCleanJsonData($result);
+            return $result;
         }
     }
 
-    public static function search($word) {
+    public static function search($title, $artist) {
         $results = array();
-        $url = AumQQHandler::$siteSearch . urlencode($word);
+        $url = AumQQHandler::$siteSearch . urlencode($title);
         $jsonContent = AumQQHandler::getContent($url, '{"data":{"song":{"list":[]}}}');
         $json = json_decode($jsonContent, true);
 
@@ -68,16 +68,9 @@ public static function downloadLyric($songId) {
         // Chinese translation
         if (strlen($json['trans']) > 0) {
             $transLyric = base64_decode($json['trans']);
-            $lyric = AumCommon::getChineseTranslationLrc($lyric, $transLyric);
+            $tl = new AumQQTranslation($lyric, $transLyric);
+            $lyric = $tl->getChineseTranslationLrc();
         }
         return $lyric;
     }
-
-    public static function getCleanJsonData($data) {
-        if (preg_match('/^\w+\((\{.+})\)\s*$/', $data)) {
-            preg_match('/^\w+\((\{.+})\)\s*$/', $data, $matches);
-            return $matches[1];
-        }
-        return $data;
-    }
 }

src/qqSource.php

@@ -17,7 +17,7 @@ public function getLyricsList($artist, $title, $info) {
         $this->mTitle = $title;
         $this->lowTitle = strtolower($title);
 
-        $list = AumQQHandler::search($title);
+        $list = AumQQHandler::search($title, $artist);
         if (count($list) === 0) {
             return 0;
         }

src/qqTranslation.php

@@ -0,0 +1,132 @@
+<?php
+
+class AumQQTranslation {
+    private $orgLrc;
+    private $transLrc;
+    public function __construct($orgLrc, $transLrc) {
+        $this->orgLrc = $orgLrc;
+        $this->transLrc = $transLrc;
+    }
+
+    private function getLrcTime($str) {
+        $key = strstr($str, ']', true);
+        if ($key === false) {
+            return '';
+        }
+
+        return $key . ']';
+    }
+
+    private function getLrcText($str, $key) {
+        if ($key === '') {
+            return $str;
+        }
+
+        return str_replace($key, '', $str);
+    }
+
+    private function isValidLrcTime($str) {
+        if (trim($str) === '' || $str[0] !== '[') {
+            return false;
+        }
+
+        $keyLen = strlen($str);
+        if ($keyLen < 9 || $keyLen > 11) {
+            return false;
+        }
+        for ($count = 1; $count < $keyLen - 1; $count++) {
+            $ch = $str[$count];
+            if ($ch !== ':' && $ch !== '.' && !is_numeric($ch)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private function isValidLrcText($str) {
+        if (trim($str) === '' || trim($str) === '//') {
+            return false;
+        }
+        return true;
+    }
+
+    private function getTimeFromTag($tag) {
+        $min = (int)substr($tag, 1, 2);
+        $sec = (int)substr($tag, 4, 2);
+        $mil = (int)substr($tag, 7, strlen($tag) - 8);
+        return $mil + $sec * 1000 + $min * 60 * 1000;
+    }
+
+    // 若 $lTime > $rTime, 返回 1; $lTime < $rTime, 返回 -1; $lTime == $rTime, 返回 0
+    private function compareTime($lTime, $rTime) {
+        $subVal = $lTime - $rTime;
+        // 允许有 1ms 的误差
+        if ($subVal > 1) {
+            return 1;
+        } elseif ($subVal < -1) {
+            return  -1;
+        } else {
+            return 0;
+        }
+    }
+
+    private function processLrcLine($lrc) {
+        $result = array();
+        foreach (explode("\n", $lrc) as $line) {
+            $line = trim($line);
+            $key = $this->getLrcTime($line);
+            $value = $this->getLrcText($line, $key);
+            if (!$this->isValidLrcTime($key) || !$this->isValidLrcText($value)) {
+                $key = '';
+                $value = $line;
+            }
+            array_push($result, array('tag' => $key, 'lrc' => $value));
+        }
+        return $result;
+    }
+
+    public function getChineseTranslationLrc()
+    {
+        $resultLrc = '';
+        $orgLines = $this->processLrcLine($this->orgLrc);
+        $transLines = $this->processLrcLine($this->transLrc);
+
+        $transCursor = 0;
+        foreach ($orgLines as $line) {
+            $key = $line['tag'];
+            $value = $line['lrc'];
+            $resultLrc .= $key . $value;
+
+            $trans = '';
+            if ($key !== '') {
+                $time = $this->getTimeFromTag($key);
+                for ($i = $transCursor; $i < count($transLines); $i++) {
+                    $tKey = $transLines[$i]['tag'];
+                    if ($tKey === '') {
+                        continue;
+                    }
+
+                    $tTime = $this->getTimeFromTag($tKey);
+                    if ($this->compareTime($tTime, $time) > 0) {
+                        $transCursor = $i;
+                        break;
+                    }
+
+                    $tValue = $transLines[$i]['lrc'];
+                    if ($this->compareTime($tTime, $time) == 0) {
+                        $transCursor = $i + 1;
+                        $trans = $tValue;
+                        break;
+                    }
+                }
+            }
+
+            if ($trans !== '') {
+                $resultLrc .= " 【{$trans}】";
+            }
+            $resultLrc .= "\n";
+        }
+        return $resultLrc;
+    }
+}