Moved fixExtension to its own class

app/src/main/java/fr/free/nrw/commons/upload/UploadItem.kt

@@ -1,9 +1,9 @@
 package fr.free.nrw.commons.upload
 
 import android.net.Uri
-import fr.free.nrw.commons.utils.Utils
 import fr.free.nrw.commons.filepicker.MimeTypeMapWrapper.Companion.getExtensionFromMimeType
 import fr.free.nrw.commons.nearby.Place
+import fr.free.nrw.commons.utils.FilenameUtils
 import fr.free.nrw.commons.utils.ImageUtils
 
 class UploadItem(
@@ -32,7 +32,7 @@ class UploadItem(
      * languages have been entered, the first language is used.
      */
     val filename: String
-        get() = Utils.fixExtension(
+        get() = FilenameUtils.fixExtension(
             uploadMediaDetails[0].captionText,
             getExtensionFromMimeType(mimeType)
         )

app/src/main/java/fr/free/nrw/commons/utils/FilenameUtils.java

@@ -0,0 +1,36 @@
+package fr.free.nrw.commons.utils;
+
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+public final class FilenameUtils {
+
+    /**
+     * Adds extension to filename. Converts to .jpg if system provides .jpeg, adds .jpg if no extension detected
+     * @param title File name
+     * @param extension Correct extension
+     * @return File with correct extension
+     */
+    public static String fixExtension(String title, String extension) {
+        Pattern jpegPattern = Pattern.compile("\\.jpeg$", Pattern.CASE_INSENSITIVE);
+
+        // People are used to ".jpg" more than ".jpeg" which the system gives us.
+        if (extension != null && extension.toLowerCase(Locale.ENGLISH).equals("jpeg")) {
+            extension = "jpg";
+        }
+        title = jpegPattern.matcher(title).replaceFirst(".jpg");
+        if (extension != null && !title.toLowerCase(Locale.getDefault())
+                .endsWith("." + extension.toLowerCase(Locale.ENGLISH))) {
+            title += "." + extension;
+        }
+
+        // If extension is still null, make it jpg. (Hotfix for https://github.com/commons-app/apps-android-commons/issues/228)
+        // If title has an extension in it, if won't be true
+        if (extension == null && title.lastIndexOf(".")<=0) {
+           extension = "jpg";
+           title += "." + extension;
+        }
+
+        return title;
+    }
+}

app/src/main/java/fr/free/nrw/commons/utils/Utils.java

@@ -7,40 +7,8 @@ import android.text.SpannableString;
 import android.text.style.UnderlineSpan;
 import android.widget.TextView;
 
-import java.util.Locale;
-import java.util.regex.Pattern;
-
 public class Utils {
 
-    /**
-     * Adds extension to filename. Converts to .jpg if system provides .jpeg, adds .jpg if no extension detected
-     * @param title File name
-     * @param extension Correct extension
-     * @return File with correct extension
-     */
-    public static String fixExtension(String title, String extension) {
-        Pattern jpegPattern = Pattern.compile("\\.jpeg$", Pattern.CASE_INSENSITIVE);
-
-        // People are used to ".jpg" more than ".jpeg" which the system gives us.
-        if (extension != null && extension.toLowerCase(Locale.ENGLISH).equals("jpeg")) {
-            extension = "jpg";
-        }
-        title = jpegPattern.matcher(title).replaceFirst(".jpg");
-        if (extension != null && !title.toLowerCase(Locale.getDefault())
-                .endsWith("." + extension.toLowerCase(Locale.ENGLISH))) {
-            title += "." + extension;
-        }
-
-        // If extension is still null, make it jpg. (Hotfix for https://github.com/commons-app/apps-android-commons/issues/228)
-        // If title has an extension in it, if won't be true
-        if (extension == null && title.lastIndexOf(".")<=0) {
-           extension = "jpg";
-           title += "." + extension;
-        }
-
-        return title;
-    }
-
     /*
     *Copies the content to the clipboard
     *

app/src/test/kotlin/fr/free/nrw/commons/utils/UtilsFixExtensionTest.kt

@@ -1,6 +1,6 @@
 package fr.free.nrw.commons.utils
 
-import fr.free.nrw.commons.utils.Utils.fixExtension
+import fr.free.nrw.commons.utils.FilenameUtils.fixExtension
 import org.junit.Assert.assertEquals
 import org.junit.Test