Update BookHelp.kt

优化章节序号和纯章节名匹配正则，使其能处理更复杂的字符串

app/src/main/java/io/legado/app/help/BookHelp.kt

@@ -327,18 +327,28 @@ object BookHelp {
         }
     }
 
-    private val chapterNamePattern by lazy {
-        Pattern.compile("^(.*?第([\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟０-９\\s]+)[章节篇回集])[、，。　：:.\\s]*")
+    private val chapterNamePattern1 by lazy {
+        Pattern.compile(".*?第([\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+)[章节篇回集话]")
     }
-
+    
+    private val chapterNamePattern2 by lazy {
+        Pattern.compile("^(?:[\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+[,:、])*([\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+)(?:[,:、]|\\.[^\\d])")
+    }
+    
+    private val regexA by lazy {
+        return@lazy "\\s".toRegex()
+    }
+    
     private fun getChapterNum(chapterName: String?): Int {
-        if (chapterName != null) {
-            val matcher: Matcher = chapterNamePattern.matcher(chapterName)
-            if (matcher.find()) {
-                return StringUtils.stringToInt(matcher.group(2))
-            }
-        }
-        return -1
+        chapterName ?: return -1
+        chapterName = StringUtils.fullToHalf(chapterName).replace(regexA, "")
+        return StringUtils.stringToInt(
+            (
+                chapterNamePattern1.matcher(chapterName).takeIf{it.find()}
+                ?:chapterNamePattern2.matcher(chapterName).takeIf{it.find()}
+            )?.group(1)
+            ?:"-1"
+        )
     }
 
     @Suppress("SpellCheckingInspection")
@@ -347,19 +357,22 @@ object BookHelp {
         return@lazy "[^\\w\\u4E00-\\u9FEF〇\\u3400-\\u4DBF\\u20000-\\u2A6DF\\u2A700-\\u2EBEF]".toRegex()
     }
 
-    private val regexA by lazy {
-        return@lazy "\\s".toRegex()
-    }
-
     private val regexB by lazy {
-        return@lazy "^第.*?章|[(\\[][^()\\[\\]]{2,}[)\\]]$".toRegex()
+        //章节序号，排除处于结尾的状况，避免将章节名替换为空字串
+        return@lazy "^.*?第(?:[\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+)[章节篇回集话](?!$)|^(?:[\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+[,:、])*(?:[\\d零〇一二两三四五六七八九十百千万壹贰叁肆伍陆柒捌玖拾佰仟]+)(?:[,:、](?!$)|\\.(?=[^\\d]))".toRegex()
     }
 
+    private val regexC by lazy {
+        //前后附加内容，整个章节名都在括号中时只剔除首尾括号，避免将章节名替换为空字串
+        return@lazy "(?!^)(?:[〖【《〔\\[{(][^〖【《〔\\[{()〕》】〗\\]}]+)?[)〕》】〗\\]}]$|^[〖【《〔\\[{(](?:[^〖【《〔\\[{()〕》】〗\\]}]+[〕》】〗\\]})])?(?!$)".toRegex()
+    }
+        
     private fun getPureChapterName(chapterName: String?): String {
         return if (chapterName == null) "" else StringUtils.fullToHalf(chapterName)
             .replace(regexA, "")
             .replace(regexB, "")
+            .replace(regexC, "")
             .replace(regexOther, "")
     }
 
-}
+}