Add NotInCallConstraint, restrict auto-download of media and documents when on an active voice or video call.

app/src/main/java/org/thoughtcrime/securesms/jobmanager/impl/NotInCallConstraint.java

@@ -0,0 +1,43 @@
+package org.thoughtcrime.securesms.jobmanager.impl;
+
+import android.app.job.JobInfo;
+
+import androidx.annotation.NonNull;
+
+import org.greenrobot.eventbus.EventBus;
+import org.thoughtcrime.securesms.events.WebRtcViewModel;
+import org.thoughtcrime.securesms.jobmanager.Constraint;
+
+/**
+ * Constraint met when the user is not in an active, connected call.
+ */
+public final class NotInCallConstraint implements Constraint {
+
+  public static final String KEY = "NotInCallConstraint";
+
+  @Override
+  public boolean isMet() {
+    return isNotInConnectedCall();
+  }
+
+  @Override
+  public @NonNull String getFactoryKey() {
+    return KEY;
+  }
+
+  public static boolean isNotInConnectedCall() {
+    WebRtcViewModel viewModel = EventBus.getDefault().getStickyEvent(WebRtcViewModel.class);
+    return viewModel == null || viewModel.getState() != WebRtcViewModel.State.CALL_CONNECTED;
+  }
+
+  @Override
+  public void applyToJobInfo(@NonNull JobInfo.Builder jobInfoBuilder) {
+  }
+
+  public static class Factory implements Constraint.Factory<NotInCallConstraint> {
+    @Override
+    public NotInCallConstraint create() {
+      return new NotInCallConstraint();
+    }
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/jobmanager/impl/NotInCallConstraintObserver.java

@@ -0,0 +1,37 @@
+package org.thoughtcrime.securesms.jobmanager.impl;
+
+import androidx.annotation.NonNull;
+
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+import org.thoughtcrime.securesms.events.WebRtcViewModel;
+import org.thoughtcrime.securesms.jobmanager.ConstraintObserver;
+
+public final class NotInCallConstraintObserver implements ConstraintObserver {
+
+  private static final String REASON = NotInCallConstraintObserver.class.getSimpleName();
+
+  @Override
+  public void register(@NonNull Notifier notifier) {
+    EventBus.getDefault().register(new EventBusListener(notifier));
+  }
+
+  private static final class EventBusListener {
+
+    private final Notifier notifier;
+
+    private EventBusListener(@NonNull Notifier notifier) {
+      this.notifier    = notifier;
+    }
+
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
+    public void consume(@NonNull WebRtcViewModel viewModel) {
+      NotInCallConstraint constraint = new NotInCallConstraint.Factory().create();
+
+      if (constraint.isMet()) {
+        notifier.onConstraintMet(REASON);
+      }
+    }
+  }
+}