Add a DiskSpaceNotLowConstraint and use for automatic attachment restore.

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

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.jobmanager.impl
+
+import android.app.job.JobInfo
+import android.os.Build
+import org.signal.core.util.DiskUtil
+import org.signal.core.util.mebiBytes
+import org.thoughtcrime.securesms.dependencies.AppDependencies
+import org.thoughtcrime.securesms.jobmanager.Constraint
+import kotlin.time.Duration.Companion.seconds
+
+/**
+ * A constraint that is met so long as there is [MINIMUM_DISK_SPACE_BYTES] of space remaining on the user's disk.
+ */
+object DiskSpaceNotLowConstraint : Constraint {
+
+  const val KEY = "DiskSpaceAvailableConstraint"
+
+  private val MINIMUM_DISK_SPACE_BYTES = 100.mebiBytes.inWholeBytes
+  private val CHECK_INTERVAL = 5.seconds.inWholeMilliseconds
+
+  private var lastKnownBytesRemaining: Long = Long.MAX_VALUE
+  private var lastCheckTime: Long = 0
+
+  override fun isMet(): Boolean {
+    if (System.currentTimeMillis() - lastCheckTime >= CHECK_INTERVAL) {
+      lastKnownBytesRemaining = DiskUtil.getAvailableSpace(AppDependencies.application).inWholeBytes
+      lastCheckTime = System.currentTimeMillis()
+    }
+
+    return lastKnownBytesRemaining > MINIMUM_DISK_SPACE_BYTES
+  }
+
+  override fun getFactoryKey(): String = KEY
+
+  override fun applyToJobInfo(jobInfoBuilder: JobInfo.Builder) {
+    if (Build.VERSION.SDK_INT >= 26) {
+      jobInfoBuilder.setRequiresStorageNotLow(true)
+    }
+  }
+
+  class Factory() : Constraint.Factory<DiskSpaceNotLowConstraint> {
+    override fun create(): DiskSpaceNotLowConstraint {
+      return DiskSpaceNotLowConstraint
+    }
+  }
+}