Invalidate auth token when removing account

app/src/main/java/org/tasks/caldav/BaseCaldavAccountSettingsActivity.java

@@ -349,7 +349,7 @@ public abstract class BaseCaldavAccountSettingsActivity extends ThemedInjectingA
     }
   }
 
-  private void removeAccount() {
+  private void removeAccountPrompt() {
     if (requestInProgress()) {
       return;
     }
@@ -357,16 +357,16 @@ public abstract class BaseCaldavAccountSettingsActivity extends ThemedInjectingA
     dialogBuilder
         .newDialog()
         .setMessage(R.string.logout_warning, caldavAccount.getName())
-        .setPositiveButton(
+        .setPositiveButton(R.string.remove, (dialog, which) -> removeAccount())
-            R.string.remove,
+        .setNegativeButton(android.R.string.cancel, null)
-            (dialog, which) -> {
+        .show();
+  }
+
+  protected void removeAccount() {
     taskDeleter.delete(caldavAccount);
     tracker.reportEvent(Events.CALDAV_ACCOUNT_REMOVED);
     setResult(RESULT_OK);
     finish();
-            })
-        .setNegativeButton(android.R.string.cancel, null)
-        .show();
   }
 
   private void discard() {
@@ -392,7 +392,7 @@ public abstract class BaseCaldavAccountSettingsActivity extends ThemedInjectingA
         startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://tasks.org/caldav")));
         break;
       case R.id.remove:
-        removeAccount();
+        removeAccountPrompt();
         break;
     }
     return onOptionsItemSelected(item);

app/src/main/java/org/tasks/etesync/EteSyncAccountSettingsActivity.java

@@ -10,6 +10,8 @@ import androidx.lifecycle.ViewModelProviders;
 import butterknife.OnFocusChange;
 import butterknife.OnTextChanged;
 import com.todoroo.astrid.helper.UUIDHelper;
+import io.reactivex.Completable;
+import io.reactivex.schedulers.Schedulers;
 import javax.inject.Inject;
 import org.tasks.R;
 import org.tasks.activities.AddEteSyncAccountViewModel;
@@ -123,4 +125,14 @@ public class EteSyncAccountSettingsActivity extends BaseCaldavAccountSettingsAct
   void onEncryptionPasswordFocused(boolean hasFocus) {
     changePasswordFocus(binding.encryptionPassword, hasFocus);
   }
+
+  @Override
+  protected void removeAccount() {
+    if (caldavAccount != null) {
+      Completable.fromAction(() -> eteSyncClient.forAccount(caldavAccount).invalidateToken())
+          .subscribeOn(Schedulers.io())
+          .subscribe();
+    }
+    super.removeAccount();
+  }
 }

app/src/main/java/org/tasks/etesync/EteSyncClient.java

@@ -57,6 +57,7 @@ public class EteSyncClient {
   private final Preferences preferences;
   private final DebugNetworkInterceptor interceptor;
   private final String username;
+  private final String token;
   private final String encryptionPassword;
   private final OkHttpClient httpClient;
   private final HttpUrl httpUrl;
@@ -75,6 +76,7 @@ public class EteSyncClient {
     this.preferences = preferences;
     this.interceptor = interceptor;
     username = null;
+    token = null;
     encryptionPassword = null;
     httpClient = null;
     httpUrl = null;
@@ -98,6 +100,7 @@ public class EteSyncClient {
     this.interceptor = interceptor;
     this.username = username;
     this.encryptionPassword = encryptionPassword;
+    this.token = token;
 
     CustomCertManager customCertManager = new CustomCertManager(context);
     customCertManager.setAppInForeground(foreground);
@@ -188,7 +191,8 @@ public class EteSyncClient {
     return result;
   }
 
-  void getSyncEntries(Journal journal, CaldavCalendar calendar, Callback<List<Pair<Entry, SyncEntry>>> callback)
+  void getSyncEntries(
+      Journal journal, CaldavCalendar calendar, Callback<List<Pair<Entry, SyncEntry>>> callback)
       throws IntegrityException, Exceptions.HttpException, VersionTooNewException {
     JournalEntryManager journalEntryManager =
         new JournalEntryManager(httpClient, httpUrl, journal.getUid());
@@ -196,7 +200,8 @@ public class EteSyncClient {
     List<Entry> journalEntries;
     do {
       journalEntries = journalEntryManager.list(crypto, calendar.getCtag(), MAX_FETCH);
-      callback.call(transform(journalEntries, e -> Pair.create(e, SyncEntry.fromJournalEntry(crypto, e))));
+      callback.call(
+          transform(journalEntries, e -> Pair.create(e, SyncEntry.fromJournalEntry(crypto, e))));
     } while (journalEntries.size() >= MAX_FETCH);
   }
 
@@ -213,4 +218,12 @@ public class EteSyncClient {
     foreground = true;
     return this;
   }
+
+  void invalidateToken() {
+    try {
+      new JournalAuthenticator(httpClient, httpUrl).invalidateAuthToken(token);
+    } catch (Exception e) {
+      Timber.e(e);
+    }
+  }
 }