Fix an issue with spaces in user ids

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/components/filebrowser/webdav/ReadFilesystemOperation.java

@@ -20,6 +20,7 @@
 
 package com.nextcloud.talk.components.filebrowser.webdav;
 
+import android.net.Uri;
 import at.bitfire.dav4android.DavResource;
 import at.bitfire.dav4android.Response;
 import at.bitfire.dav4android.exception.DavException;
@@ -34,14 +35,15 @@ import okhttp3.HttpUrl;
 import okhttp3.OkHttpClient;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 
 public class ReadFilesystemOperation {
     private final OkHttpClient okHttpClient;
     private final String url;
-    private final String basePath;
     private final int depth;
+    private final int cutOff;
 
     public ReadFilesystemOperation(OkHttpClient okHttpClient, UserEntity currentUser, String path, int depth) {
         OkHttpClient.Builder okHttpClientBuilder = okHttpClient.newBuilder();
@@ -49,7 +51,8 @@ public class ReadFilesystemOperation {
         okHttpClientBuilder.followSslRedirects(false);
         okHttpClientBuilder.authenticator(new RestModule.MagicAuthenticator(ApiUtils.getCredentials(currentUser.getUsername(), currentUser.getToken()), "Authorization"));
         this.okHttpClient = okHttpClientBuilder.build();
-        basePath = currentUser.getBaseUrl() + DavUtils.DAV_PATH + currentUser.getUserId();
+        String basePath = currentUser.getBaseUrl() + DavUtils.DAV_PATH + currentUser.getUserId();
+        cutOff = (currentUser.getBaseUrl() + DavUtils.DAV_PATH + Uri.encode(currentUser.getUserId(), String.valueOf(StandardCharsets.UTF_8))).length();
         this.url = basePath + path;
         this.depth = depth;
     }
@@ -86,10 +89,10 @@ public class ReadFilesystemOperation {
         }
 
         remoteFiles.add(BrowserFile.getModelFromResponse(rootElement[0],
-                rootElement[0].getHref().toString().substring(basePath.length())));
+                rootElement[0].getHref().toString().substring(cutOff)));
         for (Response memberElement : memberElements) {
             remoteFiles.add(BrowserFile.getModelFromResponse(memberElement,
-                    memberElement.getHref().toString().substring(basePath.length())));
+                    memberElement.getHref().toString().substring(cutOff)));
         }
 
         davResponse.setData(remoteFiles);