Fix backups deletion pipeline.

app/src/main/java/org/thoughtcrime/securesms/jobmanager/impl/DeletionNotAwaitingMediaDownloadConstraint.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.jobmanager.impl
+
+import android.app.job.JobInfo
+import org.thoughtcrime.securesms.backup.DeletionState
+import org.thoughtcrime.securesms.jobmanager.Constraint
+import org.thoughtcrime.securesms.jobmanager.ConstraintObserver
+import org.thoughtcrime.securesms.keyvalue.SignalStore
+
+/**
+ * When we are awaiting media download, we want to suppress the running of the
+ * deletion job such that once media *is* downloaded it can finish off deleting
+ * the backup.
+ */
+object DeletionNotAwaitingMediaDownloadConstraint : Constraint {
+
+  const val KEY = "DeletionNotAwaitingMediaDownloadConstraint"
+
+  override fun isMet(): Boolean {
+    return SignalStore.backup.deletionState != DeletionState.AWAITING_MEDIA_DOWNLOAD
+  }
+
+  override fun getFactoryKey(): String = KEY
+
+  override fun applyToJobInfo(jobInfoBuilder: JobInfo.Builder) = Unit
+
+  object Observer : ConstraintObserver {
+    val listeners: MutableSet<ConstraintObserver.Notifier> = mutableSetOf()
+
+    override fun register(notifier: ConstraintObserver.Notifier) {
+      listeners += notifier
+    }
+
+    fun notifyListeners() {
+      for (listener in listeners) {
+        listener.onConstraintMet(KEY)
+      }
+    }
+  }
+
+  class Factory : Constraint.Factory<DeletionNotAwaitingMediaDownloadConstraint> {
+    override fun create(): DeletionNotAwaitingMediaDownloadConstraint {
+      return DeletionNotAwaitingMediaDownloadConstraint
+    }
+  }
+}