From 3082f7b3e5bfd00ec6f6801222060dfc0d10b7e0 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Sun, 26 Mar 2023 06:54:29 -0700
Subject: Implement group commands

---
 .../java/org/traccar/helper/model/DeviceUtil.java  | 48 +++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

(limited to 'src/main/java/org/traccar/helper')

diff --git a/src/main/java/org/traccar/helper/model/DeviceUtil.java b/src/main/java/org/traccar/helper/model/DeviceUtil.java
index 597078caf..5d8cb5f25 100644
--- a/src/main/java/org/traccar/helper/model/DeviceUtil.java
+++ b/src/main/java/org/traccar/helper/model/DeviceUtil.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -16,11 +16,20 @@
 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() {
@@ -30,4 +39,41 @@ public final class DeviceUtil {
         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;
+    }
+
 }
-- 
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