feat: 优化代码

app/src/main/java/io/legado/app/data/entities/BookSource.kt

@@ -169,7 +169,7 @@ data class BookSource(
                         }
                     }
                     val b = a.split("(&&|\n)+".toRegex())
-                    b.map { c ->
+                    b.forEach { c ->
                         val d = c.split("::")
                         if (d.size > 1)
                             exploreKinds.add(ExploreKind(d[0], d[1]))

app/src/main/java/io/legado/app/data/entities/RssSource.kt

@@ -100,4 +100,18 @@ data class RssSource(
         return a == b || (a.isNullOrEmpty() && b.isNullOrEmpty())
     }
 
+    fun sortUrls(): LinkedHashMap<String, String> {
+        val sortMap = linkedMapOf<String, String>()
+        val sortUrl = sortUrl
+        if (sortUrl.isNullOrEmpty()) {
+            sortMap["default"] = sourceUrl
+        } else {
+            sortUrl.split("(&&|\n)+".toRegex()).forEach { c ->
+                val d = c.split("::")
+                if (d.size > 1)
+                    sortMap[d[0]] = d[1]
+            }
+        }
+        return sortMap
+    }
 }