Bugfix/npe help thread close (#1160)

* handle thread channel no longer exists

* apply spotless

* remove logger, no longer needed

* handle unexpected errors while marking threads archived in database

* spotless formatting

* suppress warning from sonar for usage of throwable

* catch base exception instead of throwable

Author: ankitsmt211

application/src/main/java/org/togetherjava/tjbot/features/help/HelpThreadLifecycleListener.java

@@ -1,5 +1,6 @@
 package org.togetherjava.tjbot.features.help;
 
+import net.dv8tion.jda.api.JDA;
 import net.dv8tion.jda.api.entities.channel.concrete.ThreadChannel;
 import net.dv8tion.jda.api.entities.channel.forums.ForumTag;
 import net.dv8tion.jda.api.events.channel.update.ChannelUpdateAppliedTagsEvent;
@@ -75,14 +76,25 @@ private void handleThreadStatus(ThreadChannel threadChannel) {
         boolean isArchived = threadChannel.isArchived();
 
         if (isArchived) {
-            handleArchiveStatus(closedAt, threadChannel);
+            handleArchiveStatus(closedAt, threadId, threadChannel.getJDA());
             return;
         }
 
         updateThreadStatusToActive(threadId);
     }
 
-    void handleArchiveStatus(Instant closedAt, ThreadChannel threadChannel) {
+    void handleArchiveStatus(Instant closedAt, long id, JDA jda) {
+        ThreadChannel threadChannel = jda.getThreadChannelById(id);
+        if (threadChannel == null) {
+            logger.info("thread with id: {} no longer exists, marking archived in records", id);
+            database.write(context -> context.update(HELP_THREADS)
+                .set(HELP_THREADS.CLOSED_AT, closedAt)
+                .set(HELP_THREADS.TICKET_STATUS, HelpSystemHelper.TicketStatus.ARCHIVED.val)
+                .where(HELP_THREADS.CHANNEL_ID.eq(id))
+                .execute());
+            return;
+        }
+
         long threadId = threadChannel.getIdLong();
         int messageCount = threadChannel.getMessageCount();
         int participantsExceptAuthor = threadChannel.getMemberCount() - 1;
@@ -96,6 +108,7 @@ void handleArchiveStatus(Instant closedAt, ThreadChannel threadChannel) {
             .execute());
 
         logger.info("Thread with id: {}, updated to archived status in database", threadId);
+
     }
 
     private void updateThreadStatusToActive(long threadId) {

application/src/main/java/org/togetherjava/tjbot/features/help/MarkHelpThreadCloseInDBRoutine.java

@@ -1,7 +1,6 @@
 package org.togetherjava.tjbot.features.help;
 
 import net.dv8tion.jda.api.JDA;
-import net.dv8tion.jda.api.entities.channel.concrete.ThreadChannel;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -59,13 +58,12 @@ private void updateTicketStatus(JDA jda) {
             .map(HelpThreadsRecord::getChannelId)
             .toList());
 
-
         threadIdsToClose.forEach(id -> {
             try {
-                ThreadChannel threadChannel = jda.getThreadChannelById(id);
-                helpThreadLifecycleListener.handleArchiveStatus(now, threadChannel);
+                helpThreadLifecycleListener.handleArchiveStatus(now, id, jda);
             } catch (Exception exception) {
-                logger.warn("unable to mark thread as close with id :{}", id, exception);
+                logger.warn("Failed to update status of thread with id: {} to archived", id,
+                        exception);
             }
         });
     }