Move permission getter in Apk class

Also fix permissions list based on the fact
that F-Droid deletes android.permission. prefix
only for default Android permissions, not custom ones.

app/src/main/java/org/fdroid/fdroid/AppDetails.java

@@ -92,6 +92,7 @@ import org.fdroid.fdroid.installer.InstallerService;
 import org.fdroid.fdroid.net.Downloader;
 import org.fdroid.fdroid.net.DownloaderService;
 
+import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
@@ -1375,14 +1376,12 @@ public class AppDetails extends AppCompatActivity {
         private void buildPermissionInfo() {
             final TextView permissionListView = (TextView) llViewMorePermissions.findViewById(R.id.permissions_list);
 
-            CommaSeparatedList permsList = appDetails.getApks().getItem(0).permissions;
+            ArrayList<String> permsList = appDetails.getApks().getItem(0).getFullPermissionList();
             if (permsList == null) {
                 permissionListView.setText(R.string.no_permissions);
             } else {
-                Iterator<String> permissions = permsList.iterator();
                 StringBuilder sb = new StringBuilder();
-                while (permissions.hasNext()) {
-                    final String permissionName = permissions.next();
+                for (String permissionName : permsList) {
                     try {
                         final Permission permission = new Permission(getActivity(), permissionName);
                         // TODO: Make this list RTL friendly

app/src/main/java/org/fdroid/fdroid/Permission.java

@@ -4,7 +4,7 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.content.pm.PermissionInfo;
 
-class Permission {
+public class Permission {
 
     private final PackageManager packageManager;
     private final PermissionInfo permissionInfo;
@@ -13,17 +13,7 @@ class Permission {
             throws PackageManager.NameNotFoundException {
         this.packageManager = context.getPackageManager();
         this.permissionInfo = this.packageManager.getPermissionInfo(
-                fdroidToAndroid(permission), PackageManager.GET_META_DATA);
-    }
-
-    /**
-     * It appears that all of the permissions in android.Manifest.permissions
-     * are prefixed with "android.permission." and then the constant name.
-     * FDroid just includes the constant name in the apk list, so we prefix it
-     * with "android.permission."
-     */
-    private static String fdroidToAndroid(String permission) {
-        return "android.permission." + permission;
+                permission, PackageManager.GET_META_DATA);
     }
 
     public CharSequence getName() {

app/src/main/java/org/fdroid/fdroid/data/Apk.java

@@ -5,9 +5,11 @@ import android.content.ContentValues;
 import android.database.Cursor;
 import android.os.Build;
 import android.os.Parcelable;
+import android.util.Log;
 
 import org.fdroid.fdroid.Utils;
 
+import java.util.ArrayList;
 import java.util.Date;
 
 public class Apk extends ValueObject implements Comparable<Apk> {
@@ -141,6 +143,43 @@ public class Apk extends ValueObject implements Comparable<Apk> {
         return repoAddress + "/" + apkName.replace(" ", "%20");
     }
 
+    public ArrayList<String> getFullPermissionList() {
+        if (this.permissions == null) {
+            return null;
+        }
+
+        ArrayList<String> permissionsFull = new ArrayList<>();
+        for (String perm : this.permissions) {
+            permissionsFull.add(fdroidToAndroidPermission(perm));
+        }
+        return permissionsFull;
+    }
+
+    public String[] getFullPermissionsArray() {
+        ArrayList<String> fullPermissions = getFullPermissionList();
+        if (fullPermissions == null) {
+            return null;
+        }
+
+        return fullPermissions.toArray(new String[fullPermissions.size()]);
+    }
+
+    /**
+     * It appears that the default Android permissions in android.Manifest.permissions
+     * are prefixed with "android.permission." and then the constant name.
+     * FDroid just includes the constant name in the apk list, so we prefix it
+     * with "android.permission."
+     *
+     * see https://gitlab.com/fdroid/fdroidserver/blob/master/fdroidserver/update.py#L535#
+     */
+    public static String fdroidToAndroidPermission(String permission) {
+        if (!permission.contains(".")) {
+            return "android.permission." + permission;
+        }
+
+        return permission;
+    }
+
     @Override
     public String toString() {
         return packageName + " (version " + versionCode + ")";

app/src/main/java/org/fdroid/fdroid/privileged/views/AppDiff.java

@@ -24,6 +24,7 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.os.Build;
 
+import org.fdroid.fdroid.Permission;
 import org.fdroid.fdroid.data.Apk;
 
 import java.util.ArrayList;
@@ -45,17 +46,7 @@ public class AppDiff {
         mPkgInfo = new PackageInfo();
         mPkgInfo.packageName = apk.packageName;
         mPkgInfo.applicationInfo = new ApplicationInfo();
-
-        if (apk.permissions == null) {
-            mPkgInfo.requestedPermissions = null;
-        } else {
-            // TODO: duplicate code with Permission.fdroidToAndroid
-            ArrayList<String> permissionsFixed = new ArrayList<>();
-            for (String perm : apk.permissions.toArrayList()) {
-                permissionsFixed.add("android.permission." + perm);
-            }
-            mPkgInfo.requestedPermissions = permissionsFixed.toArray(new String[permissionsFixed.size()]);
-        }
+        mPkgInfo.requestedPermissions = apk.getFullPermissionsArray();
 
         init();
     }