1 files changed, 94 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/database/SimpleObjectManager.java b/src/main/java/org/traccar/database/SimpleObjectManager.java
new file mode 100644
index 000000000..15dda4520
--- /dev/null
+++ b/src/main/java/org/traccar/database/SimpleObjectManager.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Andrey Kunitsyn (andrey@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.database;
+
+import java.sql.SQLException;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.Context;
+import org.traccar.model.BaseModel;
+import org.traccar.model.Permission;
+import org.traccar.model.User;
+
+public abstract class SimpleObjectManager<T extends BaseModel> extends BaseObjectManager<T>
+        implements ManagableObjects {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(SimpleObjectManager.class);
+
+    private Map<Long, Set<Long>> userItems;
+
+    protected SimpleObjectManager(DataManager dataManager, Class<T> baseClass) {
+        super(dataManager, baseClass);
+    }
+
+    @Override
+    public final Set<Long> getUserItems(long userId) {
+        if (!userItems.containsKey(userId)) {
+            userItems.put(userId, new HashSet<Long>());
+        }
+        return userItems.get(userId);
+    }
+
+    @Override
+    public Set<Long> getManagedItems(long userId) {
+        Set<Long> result = new HashSet<>();
+        result.addAll(getUserItems(userId));
+        for (long managedUserId : Context.getUsersManager().getUserItems(userId)) {
+            result.addAll(getUserItems(managedUserId));
+        }
+        return result;
+    }
+
+    public final boolean checkItemPermission(long userId, long itemId) {
+        return getUserItems(userId).contains(itemId);
+    }
+
+    @Override
+    public void refreshItems() {
+        super.refreshItems();
+        refreshUserItems();
+    }
+
+    public final void refreshUserItems() {
+        if (getDataManager() != null) {
+            try {
+                if (userItems != null) {
+                    userItems.clear();
+                } else {
+                    userItems = new ConcurrentHashMap<>();
+                }
+                for (Permission permission : getDataManager().getPermissions(User.class, getBaseClass())) {
+                    getUserItems(permission.getOwnerId()).add(permission.getPropertyId());
+                }
+            } catch (SQLException | ClassNotFoundException error) {
+                LOGGER.warn("Error getting permissions", error);
+            }
+        }
+    }
+
+    @Override
+    public void removeItem(long itemId) throws SQLException {
+        super.removeItem(itemId);
+        refreshUserItems();
+    }
+
+}