Improved article loading.

* We are previously checking `hasEntryByPath`, `hasEntryByTitle`, `mainEntry.isRedirect` which are internally calling the same function as we are calling after checking this condition so it would be better to directly use those function to avoid calling same function twice see more details https://github.com/kiwix/java-libkiwix/pull/60.

core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimFileReader.kt

@@ -36,7 +36,6 @@ import org.kiwix.kiwixmobile.core.utils.files.FileUtils
 import org.kiwix.libkiwix.JNIKiwixException
 import org.kiwix.libzim.Archive
 import org.kiwix.libzim.DirectAccessInfo
-import org.kiwix.libzim.EntryNotFoundException
 import org.kiwix.libzim.Item
 import org.kiwix.libzim.Query
 import org.kiwix.libzim.Search
@@ -90,11 +89,8 @@ class ZimFileReader constructor(
   val mainPage: String?
     get() =
       try {
-        if (jniKiwixReader.mainEntry.isRedirect)
         jniKiwixReader.mainEntry.getItem(true).path
-        else
-          jniKiwixReader.mainEntry.path
-      } catch (entryNotFound: EntryNotFoundException) {
+      } catch (ignore: Exception) {
         null
       }
   val id: String get() = jniKiwixReader.uuid
@@ -143,10 +139,11 @@ class ZimFileReader constructor(
     }
 
   fun getPageUrlFrom(title: String): String? =
-    if (jniKiwixReader.hasEntryByTitle(title))
+    try {
       jniKiwixReader.getEntryByTitle(title).path
-    else
+    } catch (ignore: Exception) {
       null
+    }
 
   fun getRandomArticleUrl(): String? = jniKiwixReader.randomEntry.path
 
@@ -180,12 +177,12 @@ class ZimFileReader constructor(
 
   private fun getActualUrl(url: String, actualUrl: Boolean = false): String {
     val actualPath = url.toUri().filePath.decodeUrl
-    var redirectPath = if (jniKiwixReader.hasEntryByPath(actualPath)) {
+    var redirectPath = try {
       jniKiwixReader.getEntryByPath(actualPath)
         .getItem(true)
         .path
         .replaceWithEncodedString
-    } else {
+    } catch (ignore: Exception) {
       actualPath.replaceWithEncodedString
     }
     if (actualUrl && url.decodeUrl.contains("?")) {
@@ -208,9 +205,9 @@ class ZimFileReader constructor(
     }
 
   private fun loadAsset(uri: String): InputStream? {
-    val article = if (jniKiwixReader.hasEntryByPath(uri.filePath)) {
+    val article = try {
       jniKiwixReader.getEntryByPath(uri.filePath).getItem(true)
-    } else {
+    } catch (ignore: Exception) {
       null
     }
     val infoPair = article?.directAccessInformation
@@ -260,9 +257,9 @@ class ZimFileReader constructor(
   }
 
   private fun getItem(url: String): Item? =
-    if (jniKiwixReader.hasEntryByPath(getActualUrl(url))) {
+    try {
       jniKiwixReader.getEntryByPath(getActualUrl(url)).getItem(true)
-    } else {
+    } catch (ignore: Exception) {
       null
     }