1 files changed, 79 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/helper/model/DeviceUtil.java b/src/main/java/org/traccar/helper/model/DeviceUtil.java
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--- /dev/null
+++ b/src/main/java/org/traccar/helper/model/DeviceUtil.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2022 - 2023 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.helper.model;
+
+import org.traccar.model.Device;
+import org.traccar.model.Group;
+import org.traccar.model.User;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Condition;
+import org.traccar.storage.query.Request;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public final class DeviceUtil {
+
+    private DeviceUtil() {
+    }
+
+    public static void resetStatus(Storage storage) throws StorageException {
+        storage.updateObject(new Device(), new Request(new Columns.Include("status")));
+    }
+
+
+    public static Collection<Device> getAccessibleDevices(
+            Storage storage, long userId,
+            Collection<Long> deviceIds, Collection<Long> groupIds) throws StorageException {
+
+        var devices = storage.getObjects(Device.class, new Request(
+                new Columns.All(),
+                new Condition.Permission(User.class, userId, Device.class)));
+        var deviceById = devices.stream()
+                .collect(Collectors.toUnmodifiableMap(Device::getId, x -> x));
+        var devicesByGroup = devices.stream()
+                .filter(x -> x.getGroupId() > 0)
+                .collect(Collectors.groupingBy(Device::getGroupId));
+
+        var groups = storage.getObjects(Group.class, new Request(
+                new Columns.All(),
+                new Condition.Permission(User.class, userId, Group.class)));
+        var groupsByGroup = groups.stream()
+                .filter(x -> x.getGroupId() > 0)
+                .collect(Collectors.groupingBy(Group::getGroupId));
+
+        var results = deviceIds.stream()
+                .map(deviceById::get)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+
+        var groupQueue = new LinkedList<>(groupIds);
+        while (!groupQueue.isEmpty()) {
+            long groupId = groupQueue.pop();
+            results.addAll(devicesByGroup.getOrDefault(groupId, Collections.emptyList()));
+            groupQueue.addAll(groupsByGroup.getOrDefault(groupId, Collections.emptyList())
+                    .stream().map(Group::getId).collect(Collectors.toUnmodifiableList()));
+        }
+
+        return results;
+    }
+
+}