Log token expiration

app/src/main/java/eu/faircode/email/GmailState.java

@@ -53,6 +53,13 @@ public class GmailState {
         return token;
     }
 
+    Long getAccessTokenExpirationTime() {
+        if (token == null || acquired == 0)
+            return null;
+        else
+            return acquired + TOKEN_LIFETIME;
+    }
+
     void refresh(@NonNull Context context, @NonNull String user, boolean expire) throws AuthenticatorException, OperationCanceledException, IOException {
         if (expire || acquired + TOKEN_LIFETIME < new Date().getTime())
             try {

app/src/main/java/eu/faircode/email/ServiceAuthenticator.java

@@ -33,6 +33,7 @@ import net.openid.appauth.NoClientAuthentication;
 import org.json.JSONException;
 
 import java.io.IOException;
+import java.util.Date;
 import java.util.Objects;
 import java.util.concurrent.Semaphore;
 
@@ -84,6 +85,9 @@ public class ServiceAuthenticator extends Authenticator {
         if (auth == AUTH_TYPE_GMAIL) {
             GmailState authState = GmailState.jsonDeserialize(password);
             authState.refresh(context, user, expire);
+            Long expiration = authState.getAccessTokenExpirationTime();
+            if (expiration != null)
+                EntityLog.log(context, user + " token expiration=" + new Date(expiration));
 
             String newPassword = authState.jsonSerializeString();
             if (!Objects.equals(password, newPassword)) {
@@ -96,6 +100,9 @@ public class ServiceAuthenticator extends Authenticator {
         } else if (auth == AUTH_TYPE_OAUTH) {
             AuthState authState = AuthState.jsonDeserialize(password);
             OAuthRefresh(context, provider, authState);
+            Long expiration = authState.getAccessTokenExpirationTime();
+            if (expiration != null)
+                EntityLog.log(context, user + " token expiration=" + new Date(expiration));
 
             String newPassword = authState.jsonSerializeString();
             if (!Objects.equals(password, newPassword)) {