Changes

application/common/ReferenceCheckService.php

@@ -193,7 +193,7 @@ class ReferenceCheckService
                         'created_at'      => $now,
                         'updated_at'      => $now,
                     ]);
-
+                    continue;
                     $this->pushJob(intval($checkId), $delay);
                     $checkIds[] = $checkId;
                     $queued++;
@@ -631,33 +631,33 @@ class ReferenceCheckService
     public function extractReferences($content)
     {
         $result = [];
-        preg_match_all('/<blue>\[([\d,\-\s]+)\]<\/blue>/', $content, $matches,PREG_OFFSET_CAPTURE);
+        preg_match_all('/<blue>\[([\d,\-\s]+)\]<\/blue>/', $content, $matches, PREG_OFFSET_CAPTURE);
         if (empty($matches[0])) {
             return [];
         }
 
+        $tagSpans = [];
         foreach ($matches[0] as $index => $match) {
+            $tagSpans[] = [
+                'start' => $match[1],
+                'end'   => $match[1] + strlen($match[0]),
+                'index' => $index,
+            ];
+        }
 
+        foreach ($matches[0] as $index => $match) {
             $fullTag = $match[0];
             $tagStart = $match[1];
             $tagEnd = $tagStart + strlen($fullTag);
             $rawRef = trim($matches[1][$index][0]);
             $referenceNumbers = $this->expandReferenceNumbers($rawRef);
 
-            $sentenceStart = $this->findSentenceStart($content, $tagStart);
+            list($localStart, $localEnd, $originalText) = $this->extractLocalCitationContext(
-            $sentenceEnd = $this->findSentenceEnd($content, $tagEnd, $tagEnd);
+                $content,
-            $originalText = $this->buildCitationContextText($content, $sentenceStart, $sentenceEnd);
+                $tagStart,
-
+                $tagEnd,
-            if (!$this->isMeaningfulCitationContext($originalText)) {
+                $tagSpans
-                list($sentenceStart, $sentenceEnd) = $this->widenCitationContextBounds(
+            );
-                    $content,
-                    $tagStart,
-                    $tagEnd,
-                    $sentenceStart,
-                    $sentenceEnd
-                );
-                $originalText = $this->buildCitationContextText($content, $sentenceStart, $sentenceEnd);
-            }
 
             if (!$this->isMeaningfulCitationContext($originalText) || empty($referenceNumbers)) {
                 continue;
@@ -669,14 +669,81 @@ class ReferenceCheckService
                 'original_text'       => $originalText,
                 'reference_start'     => $tagStart,
                 'reference_end'       => $tagEnd,
-                'text_start'          => $sentenceStart,
+                'text_start'          => $localStart,
-                'text_end'            => $sentenceEnd,
+                'text_end'            => $localEnd,
             ];
         }
 
         return $result;
     }
 
+    /**
+     * 按引用位置截取局部上下文：优先取标签前叙述；同句多引时后续引用从上一标签后开始。
+     */
+    private function extractLocalCitationContext($content, $tagStart, $tagEnd, array $tagSpans)
+    {
+        $sentenceStart = $this->findSentenceStart($content, $tagStart);
+        $sentenceEnd = $this->findSentenceEnd($content, $tagEnd, $tagEnd);
+
+        $prevTagEnd = $sentenceStart;
+        $nextTagStart = $sentenceEnd;
+        foreach ($tagSpans as $span) {
+            if ($span['end'] <= $tagStart && $span['end'] > $prevTagEnd && $span['end'] >= $sentenceStart) {
+                $prevTagEnd = $span['end'];
+            }
+            if ($span['start'] > $tagEnd && $span['start'] < $nextTagStart) {
+                $nextTagStart = $span['start'];
+            }
+        }
+
+        $hasPriorCiteInSentence = ($prevTagEnd > $sentenceStart);
+        // 同句后续引用：从上一 <blue> 标签后开始；首个引用：从整句开头到本标签前
+        $localStart = $hasPriorCiteInSentence ? $prevTagEnd : $sentenceStart;
+
+        // 默认：引用标签前的论述（如 Yin et al. [13] → 含 “higher than … Yin et al.”）
+        $localEnd = $tagStart;
+        $originalText = $this->buildCitationContextText($content, $localStart, $localEnd);
+
+        // 标签前几乎无正文（如句末 … ICU nurses [14]）→ 改用标签后至下一引用或句末
+        if (!$this->isMeaningfulCitationContext($originalText)
+            || $this->shouldUseTrailingCitationContext($content, $localStart, $tagStart, $tagEnd)
+        ) {
+            $trailEnd = ($nextTagStart < $sentenceEnd) ? $nextTagStart : $sentenceEnd;
+            $trailText = $this->buildCitationContextText($content, $tagEnd, $trailEnd);
+            if ($this->isMeaningfulCitationContext($trailText)) {
+                $localStart = $tagEnd;
+                $localEnd = $trailEnd;
+                $originalText = $trailText;
+            }
+        }
+
+        if (!$this->isMeaningfulCitationContext($originalText)) {
+            list($localStart, $localEnd) = $this->widenCitationContextBounds(
+                $content,
+                $tagStart,
+                $tagEnd,
+                $localStart,
+                $localEnd
+            );
+            $originalText = $this->buildCitationContextText($content, $localStart, $localEnd);
+        }
+
+        return [$localStart, $localEnd, $originalText];
+    }
+
+    /**
+     * 标签前仅有作者缩写等极短片段时，改用标签后上下文
+     */
+    private function shouldUseTrailingCitationContext($content, $localStart, $tagStart, $tagEnd)
+    {
+        $before = $this->buildCitationContextText($content, $localStart, $tagStart);
+        if (!$this->isMeaningfulCitationContext($before)) {
+            return true;
+        }
+
+        return mb_strlen($before) < 25;
+    }
+
     public function expandReferenceNumbers($refStr)
     {
         $refStr = str_replace(
@@ -703,12 +770,43 @@ class ReferenceCheckService
         return array_values(array_unique($numbers));
     }
 
+    /**
+     * 返回 $bytePos 处 UTF-8 码点占用的最后一字节之后的位置（下一字符起始）
+     */
+    private function utf8CharEnd($content, $bytePos)
+    {
+        $len = strlen($content);
+        if ($bytePos < 0 || $bytePos >= $len) {
+            return max(0, min($len, $bytePos + 1));
+        }
+        $next = $bytePos + 1;
+        while ($next < $len && (ord($content[$next]) & 0xC0) === 0x80) {
+            $next++;
+        }
+
+        return $next;
+    }
+
+    /**
+     * 按字节偏移截取（与 strpos/strlen 一致）；勿用 mb_substr，否则遇中文前缀会截断英文词头
+     */
+    private function byteSubstr($content, $start, $end)
+    {
+        $length = max(0, $end - $start);
+        if ($length === 0) {
+            return '';
+        }
+
+        return (string)mb_strcut($content, $start, $length, 'UTF-8');
+    }
+
     private function buildCitationContextText($content, $start, $end)
     {
-        $text = mb_substr($content, $start, max(0, $end - $start));
+        $text = $this->byteSubstr($content, $start, $end);
         $text = preg_replace('/<blue>\[[\d,\-\s]+\]<\/blue>/', '', $text);
         $text = trim(strip_tags($text));
         $text = preg_replace('/\s+/u', ' ', $text);
+        $text = ltrim($text, "\xEF\xBB\xBF");
 
         return $text;
     }
@@ -768,7 +866,7 @@ class ReferenceCheckService
     }
 
     /**
-     * 句号是否可作为句界（排除 0.95、3.14 等小数点）
+     * 句号是否可作为句界（排除小数点、et al. 等缩写）
      */
     private function isSentenceDelimiterAt($content, $pos, $delimiter)
     {
@@ -783,6 +881,16 @@ class ReferenceCheckService
             return false;
         }
 
+        $before = substr($content, max(0, $pos - 12), min(12, $pos));
+        if (preg_match('/\b(et\s+al|e\.g|i\.e|vs|etc|fig|no)\s*\.?\s*$/i', $before)) {
+            return false;
+        }
+
+        $after = substr($content, $pos + 1, 24);
+        if (preg_match('/^\s*<blue>\s*\[/', $after)) {
+            return false;
+        }
+
         return true;
     }
 
@@ -792,7 +900,7 @@ class ReferenceCheckService
         foreach (['.', '。', '!', '?', "\n"] as $delimiter) {
             $pos = strrpos(substr($content, 0, $position), $delimiter);
             if ($pos !== false && $this->isSentenceDelimiterAt($content, $pos, $delimiter)) {
-                $start = max($start, $pos + 1);
+                $start = max($start, $this->utf8CharEnd($content, $pos));
             }
         }
         return $start;
@@ -812,7 +920,7 @@ class ReferenceCheckService
             foreach (['.', '。', '!', '?', "\n"] as $delimiter) {
                 $pos = strpos($content, $delimiter, $minPos);
                 if ($pos !== false && $this->isSentenceDelimiterAt($content, $pos, $delimiter)) {
-                    $endPositions[] = $pos + 1;
+                    $endPositions[] = $this->utf8CharEnd($content, $pos);
                 }
             }
             if (empty($endPositions)) {