优化

app/src/main/java/io/legado/app/model/localBook/LocalBook.kt

@@ -16,12 +16,17 @@ import java.io.File
 import java.io.FileInputStream
 import java.io.FileNotFoundException
 import java.io.InputStream
-import java.util.regex.Matcher
 import java.util.regex.Pattern
 import javax.script.SimpleBindings
 
 object LocalBook {
 
+    private val nameAuthorPatterns = arrayOf(
+        Pattern.compile("(.*?)《([^《》]+)》(.*)"),
+        Pattern.compile("(^)(.+) 作者：(.+)$"),
+        Pattern.compile("(^)(.+) by (.+)$")
+    )
+
     @Throws(FileNotFoundException::class, SecurityException::class)
     fun getBookInputStream(book: Book): InputStream {
         val uri = Uri.parse(book.bookUrl)
@@ -117,21 +122,16 @@ object LocalBook {
         val tempFileName = fileName.substringBeforeLast(".")
         var name: String
         var author: String
-        //匹配(知轩藏书常用格式) 《书名》其它信息作者：作者名.txt
-        val m1 = Pattern
-            .compile("(.*?)《([^《》]+)》(.*)")
-            .matcher(tempFileName)
-        //匹配 书名 作者：作者名.txt
-        val m2 = Pattern
-            .compile("(^)(.+) 作者：(.+)$")
-            .matcher(tempFileName)
-
-        (m1.takeIf { m1.find() } ?: m2.takeIf { m2.find() }).run {
-            if (this is Matcher) {
-                //按默认格式将文件名分解成书名、作者名
+        for (pattern in nameAuthorPatterns) {
+            pattern.matcher(tempFileName).takeIf { it.find() }?.run {
                 name = group(2)!!
-                author = BookHelp.formatBookAuthor((group(1) ?: "") + (group(3) ?: ""))
-            } else if (!AppConfig.bookImportFileName.isNullOrBlank()) {
+                val group1 = group(1) ?: ""
+                val group3 = group(3) ?: ""
+                author = BookHelp.formatBookAuthor(group1 + group3)
+                return Pair(name, author)
+            }
+        }
+        if (!AppConfig.bookImportFileName.isNullOrBlank()) {
             try {
                 //在脚本中定义如何分解文件名成书名、作者名
                 val jsonStr = AppConst.SCRIPT_ENGINE.eval(
@@ -154,8 +154,6 @@ object LocalBook {
             author = BookHelp.formatBookAuthor(tempFileName.replace(name, ""))
                 .takeIf { it.length != tempFileName.length } ?: ""
         }
-
-        }
         return Pair(name, author)
     }