Merge pull request #2801 from Abyss777/manager

Implement user management

15 files changed, 360 insertions, 54 deletions

diff --git a/src/org/traccar/api/resource/CalendarResource.java b/src/org/traccar/api/resource/CalendarResource.java
index 0a9bb5daf..641d3b4b5 100644
--- a/src/org/traccar/api/resource/CalendarResource.java
+++ b/src/org/traccar/api/resource/CalendarResource.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 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.
@@ -45,8 +45,12 @@ public class CalendarResource extends BaseResource {
             @QueryParam("all") boolean all, @QueryParam("userId") long userId) throws SQLException {
 
         if (all) {
-            Context.getPermissionsManager().checkAdmin(getUserId());
-            return Context.getCalendarManager().getAllCalendars();
+            if (Context.getPermissionsManager().isAdmin(getUserId())) {
+                return Context.getCalendarManager().getAllCalendars();
+            } else {
+                Context.getPermissionsManager().checkManager(getUserId());
+                return Context.getCalendarManager().getManagedCalendars(getUserId());
+            }
         } else {
             if (userId == 0) {
                 userId = getUserId();
diff --git a/src/org/traccar/api/resource/DevicePermissionResource.java b/src/org/traccar/api/resource/DevicePermissionResource.java
index 3b89507fa..af38676b0 100644
--- a/src/org/traccar/api/resource/DevicePermissionResource.java
+++ b/src/org/traccar/api/resource/DevicePermissionResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2017 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.
@@ -35,7 +35,12 @@ public class DevicePermissionResource extends BaseResource {
 
     @POST
     public Response add(DevicePermission entity) throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
+        Context.getPermissionsManager().checkReadonly(getUserId());
+        Context.getPermissionsManager().checkUser(getUserId(), entity.getUserId());
+        Context.getPermissionsManager().checkDevice(getUserId(), entity.getDeviceId());
+        if (!Context.getPermissionsManager().isAdmin(getUserId())) {
+            Context.getPermissionsManager().checkDeviceLimit(entity.getUserId());
+        }
         Context.getDataManager().linkDevice(entity.getUserId(), entity.getDeviceId());
         Context.getPermissionsManager().refreshPermissions();
         if (Context.getGeofenceManager() != null) {
@@ -46,7 +51,9 @@ public class DevicePermissionResource extends BaseResource {
 
     @DELETE
     public Response remove(DevicePermission entity) throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
+        Context.getPermissionsManager().checkReadonly(getUserId());
+        Context.getPermissionsManager().checkUser(getUserId(), entity.getUserId());
+        Context.getPermissionsManager().checkDevice(getUserId(), entity.getDeviceId());
         Context.getDataManager().unlinkDevice(entity.getUserId(), entity.getDeviceId());
         Context.getPermissionsManager().refreshPermissions();
         if (Context.getGeofenceManager() != null) {
diff --git a/src/org/traccar/api/resource/DeviceResource.java b/src/org/traccar/api/resource/DeviceResource.java
index e4ecd3625..c9680ac77 100644
--- a/src/org/traccar/api/resource/DeviceResource.java
+++ b/src/org/traccar/api/resource/DeviceResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2017 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.
@@ -44,8 +44,12 @@ public class DeviceResource extends BaseResource {
     public Collection<Device> get(
             @QueryParam("all") boolean all, @QueryParam("userId") long userId) throws SQLException {
         if (all) {
-            Context.getPermissionsManager().checkAdmin(getUserId());
-            return Context.getDeviceManager().getAllDevices();
+            if (Context.getPermissionsManager().isAdmin(getUserId())) {
+                return Context.getDeviceManager().getAllDevices();
+            } else {
+                Context.getPermissionsManager().checkManager(getUserId());
+                return Context.getDeviceManager().getManagedDevices(getUserId());
+            }
         } else {
             if (userId == 0) {
                 userId = getUserId();
@@ -58,13 +62,7 @@ public class DeviceResource extends BaseResource {
     @POST
     public Response add(Device entity) throws SQLException {
         Context.getPermissionsManager().checkReadonly(getUserId());
-        int deviceLimit = Context.getPermissionsManager().getUser(getUserId()).getDeviceLimit();
-        if (deviceLimit != 0) {
-            int deviceCount = Context.getPermissionsManager().getDevicePermissions(getUserId()).size();
-            if (deviceCount >= deviceLimit) {
-                throw new SecurityException("User device limit reached");
-            }
-        }
+        Context.getPermissionsManager().checkDeviceLimit(getUserId());
         Context.getDeviceManager().addDevice(entity);
         Context.getDataManager().linkDevice(getUserId(), entity.getId());
         Context.getPermissionsManager().refreshPermissions();
diff --git a/src/org/traccar/api/resource/GeofenceResource.java b/src/org/traccar/api/resource/GeofenceResource.java
index 591908813..d5acf106a 100644
--- a/src/org/traccar/api/resource/GeofenceResource.java
+++ b/src/org/traccar/api/resource/GeofenceResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 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.
@@ -52,16 +52,20 @@ public class GeofenceResource extends BaseResource {
             geofenceManager.refreshGeofences();
         }
 
-        Set<Long> result;
+        Set<Long> result = new HashSet<>();
         if (all) {
-            Context.getPermissionsManager().checkAdmin(getUserId());
-            result = new HashSet<>(geofenceManager.getAllGeofencesIds());
+            if (Context.getPermissionsManager().isAdmin(getUserId())) {
+                result.addAll(geofenceManager.getAllGeofencesIds());
+            } else {
+                Context.getPermissionsManager().checkManager(getUserId());
+                result.addAll(geofenceManager.getManagedGeofencesIds(getUserId()));
+            }
         } else {
             if (userId == 0) {
                 userId = getUserId();
             }
             Context.getPermissionsManager().checkUser(getUserId(), userId);
-            result = new HashSet<>(geofenceManager.getUserGeofencesIds(userId));
+            result.addAll(geofenceManager.getUserGeofencesIds(userId));
         }
 
         if (groupId != 0) {
diff --git a/src/org/traccar/api/resource/GroupPermissionResource.java b/src/org/traccar/api/resource/GroupPermissionResource.java
index 07f101765..61a725222 100644
--- a/src/org/traccar/api/resource/GroupPermissionResource.java
+++ b/src/org/traccar/api/resource/GroupPermissionResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 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.
@@ -35,7 +35,9 @@ public class GroupPermissionResource extends BaseResource {
 
     @POST
     public Response add(GroupPermission entity) throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
+        Context.getPermissionsManager().checkReadonly(getUserId());
+        Context.getPermissionsManager().checkUser(getUserId(), entity.getUserId());
+        Context.getPermissionsManager().checkGroup(getUserId(), entity.getGroupId());
         Context.getDataManager().linkGroup(entity.getUserId(), entity.getGroupId());
         Context.getPermissionsManager().refreshPermissions();
         if (Context.getGeofenceManager() != null) {
@@ -46,7 +48,9 @@ public class GroupPermissionResource extends BaseResource {
 
     @DELETE
     public Response remove(GroupPermission entity) throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
+        Context.getPermissionsManager().checkReadonly(getUserId());
+        Context.getPermissionsManager().checkUser(getUserId(), entity.getUserId());
+        Context.getPermissionsManager().checkGroup(getUserId(), entity.getGroupId());
         Context.getDataManager().unlinkGroup(entity.getUserId(), entity.getGroupId());
         Context.getPermissionsManager().refreshPermissions();
         if (Context.getGeofenceManager() != null) {
diff --git a/src/org/traccar/api/resource/GroupResource.java b/src/org/traccar/api/resource/GroupResource.java
index c98a20b7e..ceba69105 100644
--- a/src/org/traccar/api/resource/GroupResource.java
+++ b/src/org/traccar/api/resource/GroupResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 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.
@@ -42,8 +42,12 @@ public class GroupResource extends BaseResource {
     public Collection<Group> get(
             @QueryParam("all") boolean all, @QueryParam("userId") long userId) throws SQLException {
         if (all) {
-            Context.getPermissionsManager().checkAdmin(getUserId());
-            return Context.getDeviceManager().getAllGroups();
+            if (Context.getPermissionsManager().isAdmin(getUserId())) {
+                return Context.getDeviceManager().getAllGroups();
+            } else {
+                Context.getPermissionsManager().checkManager(getUserId());
+                return Context.getDeviceManager().getManagedGroups(getUserId());
+            }
         } else {
             if (userId == 0) {
                 userId = getUserId();
diff --git a/src/org/traccar/api/resource/UserPermissionResource.java b/src/org/traccar/api/resource/UserPermissionResource.java
new file mode 100644
index 000000000..a97c4a665
--- /dev/null
+++ b/src/org/traccar/api/resource/UserPermissionResource.java
@@ -0,0 +1,56 @@
+/*
+ * 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.api.resource;
+
+import java.sql.SQLException;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.traccar.Context;
+import org.traccar.api.BaseResource;
+import org.traccar.model.UserPermission;
+
+@Path("permissions/users")
+@Produces(MediaType.APPLICATION_JSON)
+@Consumes(MediaType.APPLICATION_JSON)
+public class UserPermissionResource extends BaseResource {
+
+    @POST
+    public Response add(UserPermission entity) throws SQLException {
+        Context.getPermissionsManager().checkAdmin(getUserId());
+        if (entity.getUserId() != entity.getManagedUserId()) {
+            Context.getDataManager().linkUser(entity.getUserId(), entity.getManagedUserId());
+            Context.getPermissionsManager().refreshUserPermissions();
+        }
+        return Response.ok(entity).build();
+    }
+
+    @DELETE
+    public Response remove(UserPermission entity) throws SQLException {
+        Context.getPermissionsManager().checkAdmin(getUserId());
+        Context.getDataManager().unlinkUser(entity.getUserId(), entity.getManagedUserId());
+        Context.getPermissionsManager().refreshUserPermissions();
+        return Response.noContent().build();
+    }
+
+}
diff --git a/src/org/traccar/api/resource/UserResource.java b/src/org/traccar/api/resource/UserResource.java
index 678daac9b..dd59a11ee 100644
--- a/src/org/traccar/api/resource/UserResource.java
+++ b/src/org/traccar/api/resource/UserResource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2017 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.
@@ -28,6 +28,7 @@ import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.sql.SQLException;
@@ -40,25 +41,42 @@ import java.util.Date;
 public class UserResource extends BaseResource {
 
     @GET
-    public Collection<User> get() throws SQLException {
-        Context.getPermissionsManager().checkAdmin(getUserId());
-        return Context.getPermissionsManager().getUsers();
+    public Collection<User> get(@QueryParam("userId") long userId) throws SQLException {
+        if (Context.getPermissionsManager().isAdmin(getUserId())) {
+            if (userId != 0) {
+                return Context.getPermissionsManager().getUsers(userId);
+            } else {
+                return Context.getPermissionsManager().getAllUsers();
+            }
+        } else if (Context.getPermissionsManager().isManager(getUserId())) {
+            return Context.getPermissionsManager().getManagedUsers(getUserId());
+        } else {
+            throw new SecurityException("Admin or manager access required");
+        }
     }
 
     @PermitAll
     @POST
     public Response add(User entity) throws SQLException {
         if (!Context.getPermissionsManager().isAdmin(getUserId())) {
-            Context.getPermissionsManager().checkRegistration(getUserId());
             Context.getPermissionsManager().checkUserUpdate(getUserId(), new User(), entity);
-            entity.setDeviceLimit(Context.getConfig().getInteger("users.defaultDeviceLimit"));
-            int expirationDays = Context.getConfig().getInteger("users.defaultExpirationDays");
-            if (expirationDays > 0) {
-                entity.setExpirationTime(
-                    new Date(System.currentTimeMillis() + (long) expirationDays * 24 * 3600 * 1000));
+            if (Context.getPermissionsManager().isManager(getUserId())) {
+                Context.getPermissionsManager().checkUserLimit(getUserId());
+            } else {
+                Context.getPermissionsManager().checkRegistration(getUserId());
+                entity.setDeviceLimit(Context.getConfig().getInteger("users.defaultDeviceLimit"));
+                int expirationDays = Context.getConfig().getInteger("users.defaultExpirationDays");
+                if (expirationDays > 0) {
+                    entity.setExpirationTime(
+                        new Date(System.currentTimeMillis() + (long) expirationDays * 24 * 3600 * 1000));
+                }
             }
         }
         Context.getPermissionsManager().addUser(entity);
+        if (Context.getPermissionsManager().isManager(getUserId())) {
+            Context.getDataManager().linkUser(getUserId(), entity.getId());
+        }
+        Context.getPermissionsManager().refreshUserPermissions();
         if (Context.getNotificationManager() != null) {
             Context.getNotificationManager().refresh();
         }
diff --git a/src/org/traccar/database/CalendarManager.java b/src/org/traccar/database/CalendarManager.java
index 3e95f6698..31d484327 100644
--- a/src/org/traccar/database/CalendarManager.java
+++ b/src/org/traccar/database/CalendarManager.java
@@ -1,6 +1,6 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 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.
@@ -24,6 +24,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.traccar.Context;
 import org.traccar.helper.Log;
 import org.traccar.model.Calendar;
 import org.traccar.model.CalendarPermission;
@@ -69,6 +70,15 @@ public class CalendarManager {
         return result;
     }
 
+    public Collection<Calendar> getManagedCalendars(long userId) {
+        ArrayList<Calendar> result = new ArrayList<>();
+        result.addAll(getUserCalendars(userId));
+        for (long managedUserId : Context.getPermissionsManager().getUserPermissions(userId)) {
+            result.addAll(getUserCalendars(managedUserId));
+        }
+        return result;
+    }
+
     public final void refreshUserCalendars() {
         if (dataManager != null) {
             try {
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index 278109229..8337762f7 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2017 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.
@@ -51,6 +51,7 @@ import org.traccar.model.Position;
 import org.traccar.model.Server;
 import org.traccar.model.Statistics;
 import org.traccar.model.User;
+import org.traccar.model.UserPermission;
 import org.traccar.model.DeviceGeofence;
 import org.traccar.model.GeofencePermission;
 
@@ -527,4 +528,23 @@ public class DataManager {
                 .setLong("calendarId", calendarId)
                 .executeUpdate();
     }
+
+    public Collection<UserPermission> getUserPermissions() throws SQLException {
+        return QueryBuilder.create(dataSource, getQuery("database.selectUserPermissions"))
+                .executeQuery(UserPermission.class);
+    }
+
+    public void linkUser(long userId, long managedUserId) throws SQLException {
+        QueryBuilder.create(dataSource, getQuery("database.linkUser"))
+                .setLong("userId", userId)
+                .setLong("managedUserId", managedUserId)
+                .executeUpdate();
+    }
+
+    public void unlinkUser(long userId, long managedUserId) throws SQLException {
+        QueryBuilder.create(dataSource, getQuery("database.unlinkUser"))
+                .setLong("userId", userId)
+                .setLong("managedUserId", managedUserId)
+                .executeUpdate();
+    }
 }
diff --git a/src/org/traccar/database/DeviceManager.java b/src/org/traccar/database/DeviceManager.java
index c70e67231..8e75903db 100644
--- a/src/org/traccar/database/DeviceManager.java
+++ b/src/org/traccar/database/DeviceManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 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.
@@ -160,6 +160,15 @@ public class DeviceManager implements IdentityManager {
         return devices;
     }
 
+    public Collection<Device> getManagedDevices(long userId) throws SQLException {
+        Collection<Device> devices = new ArrayList<>();
+        devices.addAll(getDevices(userId));
+        for (long managedUserId : Context.getPermissionsManager().getUserPermissions(userId)) {
+            devices.addAll(getDevices(managedUserId));
+        }
+        return devices;
+    }
+
     public void addDevice(Device device) throws SQLException {
         dataManager.addDevice(device);
 
@@ -289,6 +298,15 @@ public class DeviceManager implements IdentityManager {
         return groups;
     }
 
+    public Collection<Group> getManagedGroups(long userId) throws SQLException {
+        Collection<Group> groups = new ArrayList<>();
+        groups.addAll(getGroups(userId));
+        for (long managedUserId : Context.getPermissionsManager().getUserPermissions(userId)) {
+            groups.addAll(getGroups(managedUserId));
+        }
+        return groups;
+    }
+
     private void checkGroupCycles(Group group) {
         Set<Long> groups = new HashSet<>();
         while (group != null) {
diff --git a/src/org/traccar/database/GeofenceManager.java b/src/org/traccar/database/GeofenceManager.java
index e2e0c12d4..b8e6a5d73 100644
--- a/src/org/traccar/database/GeofenceManager.java
+++ b/src/org/traccar/database/GeofenceManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2017 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.
@@ -242,6 +242,15 @@ public class GeofenceManager {
         }
     }
 
+    public final Set<Long> getManagedGeofencesIds(long userId) {
+        Set<Long> geofences = new HashSet<>();
+        geofences.addAll(getUserGeofencesIds(userId));
+        for (long managedUserId : Context.getPermissionsManager().getUserPermissions(userId)) {
+            geofences.addAll(getUserGeofencesIds(managedUserId));
+        }
+        return geofences;
+    }
+
     public final Collection<Geofence> getGeofences(Set<Long> geofencesIds) {
         geofencesLock.readLock().lock();
         try {
diff --git a/src/org/traccar/database/PermissionsManager.java b/src/org/traccar/database/PermissionsManager.java
index 6c0610655..4a5f759a8 100644
--- a/src/org/traccar/database/PermissionsManager.java
+++ b/src/org/traccar/database/PermissionsManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2017 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.
@@ -23,8 +23,10 @@ import org.traccar.model.Group;
 import org.traccar.model.GroupPermission;
 import org.traccar.model.Server;
 import org.traccar.model.User;
+import org.traccar.model.UserPermission;
 
 import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -47,6 +49,8 @@ public class PermissionsManager {
     private final Map<Long, Set<Long>> deviceUsers = new HashMap<>();
     private final Map<Long, Set<Long>> groupDevices = new HashMap<>();
 
+    private final Map<Long, Set<Long>> userPermissions = new HashMap<>();
+
     public Set<Long> getGroupPermissions(long userId) {
         if (!groupPermissions.containsKey(userId)) {
             groupPermissions.put(userId, new HashSet<Long>());
@@ -75,10 +79,18 @@ public class PermissionsManager {
         return groupDevices.get(groupId);
     }
 
+    public Set<Long> getUserPermissions(long userId) {
+        if (!userPermissions.containsKey(userId)) {
+            userPermissions.put(userId, new HashSet<Long>());
+        }
+        return userPermissions.get(userId);
+    }
+
     public PermissionsManager(DataManager dataManager) {
         this.dataManager = dataManager;
         refreshUsers();
         refreshPermissions();
+        refreshUserPermissions();
     }
 
     public final void refreshUsers() {
@@ -97,6 +109,17 @@ public class PermissionsManager {
         }
     }
 
+    public final void refreshUserPermissions() {
+        userPermissions.clear();
+        try {
+            for (UserPermission permission : dataManager.getUserPermissions()) {
+                getUserPermissions(permission.getUserId()).add(permission.getManagedUserId());
+            }
+        } catch (SQLException error) {
+            Log.warning(error);
+        }
+    }
+
     public final void refreshPermissions() {
         groupPermissions.clear();
         devicePermissions.clear();
@@ -146,6 +169,39 @@ public class PermissionsManager {
         }
     }
 
+    public boolean isManager(long userId) {
+        return users.containsKey(userId) && users.get(userId).getUserLimit() > 0;
+    }
+
+    public void checkManager(long userId) throws SecurityException {
+        if (!isManager(userId)) {
+            throw new SecurityException("Manager access required");
+        }
+    }
+
+    public void checkManager(long userId, long managedUserId) throws SecurityException {
+        checkManager(userId);
+        if (!userPermissions.get(userId).contains(managedUserId)) {
+            throw new SecurityException("User access denied");
+        }
+    }
+
+    public void checkUserLimit(long userId) throws SecurityException {
+        if (!isAdmin(userId) && userPermissions.get(userId).size() >= users.get(userId).getUserLimit()) {
+            throw new SecurityException("Manager user limit reached");
+        }
+    }
+
+    public void checkDeviceLimit(long userId) throws SecurityException {
+        int deviceLimit = users.get(userId).getDeviceLimit();
+        if (deviceLimit != 0) {
+            int deviceCount = getDevicePermissions(userId).size();
+            if (deviceCount >= deviceLimit) {
+                throw new SecurityException("User device limit reached");
+            }
+        }
+    }
+
     public boolean isReadonly(long userId) {
         return users.containsKey(userId) && users.get(userId).getReadonly();
     }
@@ -168,29 +224,49 @@ public class PermissionsManager {
 
     public void checkUserUpdate(long userId, User before, User after) throws SecurityException {
         if (before.getAdmin() != after.getAdmin()
-                || before.getReadonly() != after.getReadonly()
-                || before.getDisabled() != after.getDisabled()
                 || before.getDeviceLimit() != after.getDeviceLimit()
+                || before.getUserLimit() != after.getUserLimit()) {
+            checkAdmin(userId);
+        }
+        if (before.getReadonly() != after.getReadonly()
+                || before.getDisabled() != after.getDisabled()
                 || !Objects.equals(before.getExpirationTime(), after.getExpirationTime())
                 || !Objects.equals(before.getToken(), after.getToken())) {
-            checkAdmin(userId);
+            if (userId == after.getId()) {
+                checkAdmin(userId);
+            }
+            if (!isAdmin(userId)) {
+                checkManager(userId);
+            }
         }
     }
 
-    public void checkUser(long userId, long otherUserId) throws SecurityException {
-        if (userId != otherUserId) {
-            checkAdmin(userId);
+    public void checkUser(long userId, long managedUserId) throws SecurityException {
+        if (userId != managedUserId && !isAdmin(userId)) {
+            checkManager(userId, managedUserId);
         }
     }
 
     public void checkGroup(long userId, long groupId) throws SecurityException {
-        if (!getGroupPermissions(userId).contains(groupId)) {
+        if (!getGroupPermissions(userId).contains(groupId) && !isAdmin(userId)) {
+            checkManager(userId);
+            for (long managedUserId : getUserPermissions(userId)) {
+                if (getGroupPermissions(managedUserId).contains(groupId)) {
+                    return;
+                }
+            }
             throw new SecurityException("Group access denied");
         }
     }
 
     public void checkDevice(long userId, long deviceId) throws SecurityException {
-        if (!getDevicePermissions(userId).contains(deviceId)) {
+        if (!getDevicePermissions(userId).contains(deviceId) && !isAdmin(userId)) {
+            checkManager(userId);
+            for (long managedUserId : getUserPermissions(userId)) {
+                if (getDevicePermissions(managedUserId).contains(deviceId)) {
+                    return;
+                }
+            }
             throw new SecurityException("Device access denied");
         }
     }
@@ -203,12 +279,24 @@ public class PermissionsManager {
 
     public void checkGeofence(long userId, long geofenceId) throws SecurityException {
         if (!Context.getGeofenceManager().checkGeofence(userId, geofenceId) && !isAdmin(userId)) {
+            checkManager(userId);
+            for (long managedUserId : getUserPermissions(userId)) {
+                if (Context.getGeofenceManager().checkGeofence(managedUserId, geofenceId)) {
+                    return;
+                }
+            }
             throw new SecurityException("Geofence access denied");
         }
     }
 
     public void checkCalendar(long userId, long calendarId) throws SecurityException {
         if (!Context.getCalendarManager().checkCalendar(userId, calendarId) && !isAdmin(userId)) {
+            checkManager(userId);
+            for (long managedUserId : getUserPermissions(userId)) {
+                if (Context.getCalendarManager().checkCalendar(managedUserId, calendarId)) {
+                    return;
+                }
+            }
             throw new SecurityException("Calendar access denied");
         }
     }
@@ -222,10 +310,24 @@ public class PermissionsManager {
         this.server = server;
     }
 
-    public Collection<User> getUsers() {
+    public Collection<User> getAllUsers() {
         return users.values();
     }
 
+    public Collection<User> getUsers(long userId) {
+        Collection<User> result = new ArrayList<>();
+        for (long managedUserId : getUserPermissions(userId)) {
+            result.add(users.get(managedUserId));
+        }
+        return result;
+    }
+
+    public Collection<User> getManagedUsers(long userId) {
+        Collection<User> result = getUsers(userId);
+        result.add(users.get(userId));
+        return result;
+    }
+
     public User getUser(long userId) {
         return users.get(userId);
     }
@@ -257,6 +359,7 @@ public class PermissionsManager {
         usersTokens.remove(users.get(userId).getToken());
         users.remove(userId);
         refreshPermissions();
+        refreshUserPermissions();
     }
 
     public User login(String email, String password) throws SQLException {
diff --git a/src/org/traccar/model/User.java b/src/org/traccar/model/User.java
index e6b9d663f..72fe2c9f9 100644
--- a/src/org/traccar/model/User.java
+++ b/src/org/traccar/model/User.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2013 - 2017 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.
@@ -180,6 +180,16 @@ public class User extends Extensible {
         this.deviceLimit = deviceLimit;
     }
 
+    private int userLimit;
+
+    public int getUserLimit() {
+        return userLimit;
+    }
+
+    public void setUserLimit(int userLimit) {
+        this.userLimit = userLimit;
+    }
+
     private String token;
 
     public String getToken() {
diff --git a/src/org/traccar/model/UserPermission.java b/src/org/traccar/model/UserPermission.java
new file mode 100644
index 000000000..39ead5ef1
--- /dev/null
+++ b/src/org/traccar/model/UserPermission.java
@@ -0,0 +1,41 @@
+/*
+ * 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.model;
+
+public class UserPermission {
+
+    private long userId;
+
+    public long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(long userId) {
+        this.userId = userId;
+    }
+
+    private long managedUserId;
+
+    public long getManagedUserId() {
+        return managedUserId;
+    }
+
+    public void setManagedUserId(long managedUserId) {
+        this.managedUserId = managedUserId;
+    }
+
+}