Fix job queue issue resuming message send job (#990)

Author: SessionHero01

libsession/src/main/java/org/session/libsession/messaging/jobs/JobQueue.kt

@@ -1,8 +1,6 @@
 package org.session.libsession.messaging.jobs
 
-import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.channels.Channel
@@ -11,6 +9,7 @@ import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import org.session.libsession.messaging.MessagingModuleConfiguration
 import org.session.libsignal.utilities.Log
+import java.lang.RuntimeException
 import java.util.Timer
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicInteger
@@ -19,14 +18,16 @@ import kotlin.math.min
 import kotlin.math.pow
 import kotlin.math.roundToLong
 
-@OptIn(ExperimentalCoroutinesApi::class)
 class JobQueue : JobDelegate {
     private var hasResumedPendingJobs = false // Just for debugging
     private val jobTimestampMap = ConcurrentHashMap<Long, AtomicInteger>()
 
     private val scope: CoroutineScope = GlobalScope
     private val queue = Channel<Job>(UNLIMITED)
-    private val pendingJobIds = mutableSetOf<String>()
+
+    // Track the send message jobs that are pending or in progress. This doesn't take the
+    // first launch of the send message job into account
+    private val pendingSendMessageJobIDs = hashSetOf<String>()
 
     private val openGroupChannels = mutableMapOf<String, Channel<Job>>()
 
@@ -92,12 +93,19 @@ class JobQueue : JobDelegate {
         Log.d(dispatcherName,"processJob: ${javaClass.simpleName} (id: $id)")
         delegate = this@JobQueue
 
-        try {
+        val runResult = runCatching {
             execute(dispatcherName)
         }
-        catch (e: Exception) {
+
+        // Remove the job from the pending "send message job" list, regardless of whether
+        // we are a send message job, as IDs are unique across all job types
+        synchronized(pendingSendMessageJobIDs) {
+            pendingSendMessageJobIDs.remove(id)
+        }
+
+        runResult.onFailure { e ->
             Log.d(dispatcherName, "unhandledJobException: ${javaClass.simpleName} (id: $id)", e)
-            this@JobQueue.handleJobFailed(this, dispatcherName, e)
+            this@JobQueue.handleJobFailed(this, dispatcherName, e as? Exception ?: RuntimeException(e))
         }
     }
 
@@ -181,7 +189,13 @@ class JobQueue : JobDelegate {
             Log.e("Loki", "tried to resume pending send job with no ID")
             return
         }
-        if (!pendingJobIds.add(id)) {
+
+        // Check if the job is already in progress and mark it as in progress if it is not
+        val jobIsInProgress = synchronized(pendingSendMessageJobIDs) {
+            !pendingSendMessageJobIDs.add(id)
+        }
+
+        if (jobIsInProgress) {
             Log.e("Loki","tried to re-queue pending/in-progress job (id: $id)")
             return
         }
@@ -234,7 +248,6 @@ class JobQueue : JobDelegate {
     override fun handleJobSucceeded(job: Job, dispatcherName: String) {
         val jobId = job.id ?: return
         MessagingModuleConfiguration.shared.storage.markJobAsSucceeded(jobId)
-        pendingJobIds.remove(jobId)
     }
 
     override fun handleJobFailed(job: Job, dispatcherName: String, error: Exception) {