1 files changed, 99 insertions, 5 deletions
diff --git a/src/main/java/org/traccar/storage/query/Condition.java b/src/main/java/org/traccar/storage/query/Condition.java
index 82c8e8479..08b199052 100644
--- a/src/main/java/org/traccar/storage/query/Condition.java
+++ b/src/main/java/org/traccar/storage/query/Condition.java
@@ -1,14 +1,41 @@
+/*
+ * Copyright 2022 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.storage.query;
 
+import org.traccar.model.GroupedModel;
+
+import java.util.List;
+
 public interface Condition {
 
-    class Equals extends Compare {
-        public Equals(String column, String variable) {
-            this(column, variable, null);
+    static Condition merge(List<Condition> conditions) {
+        Condition result = null;
+        var iterator = conditions.iterator();
+        if (iterator.hasNext()) {
+            result = iterator.next();
+            while (iterator.hasNext()) {
+                result = new Condition.And(result, iterator.next());
+            }
         }
+        return result;
+    }
 
-        public Equals(String column, String variable, Object value) {
-            super(column, "=", variable, value);
+    class Equals extends Compare {
+        public Equals(String column, Object value) {
+            super(column, "=", column, value);
         }
     }
 
@@ -114,4 +141,71 @@ public interface Condition {
         }
     }
 
+    class Permission implements Condition {
+        private final Class<?> ownerClass;
+        private final long ownerId;
+        private final Class<?> propertyClass;
+        private final long propertyId;
+        private final boolean excludeGroups;
+
+        private Permission(
+                Class<?> ownerClass, long ownerId, Class<?> propertyClass, long propertyId, boolean excludeGroups) {
+            this.ownerClass = ownerClass;
+            this.ownerId = ownerId;
+            this.propertyClass = propertyClass;
+            this.propertyId = propertyId;
+            this.excludeGroups = excludeGroups;
+        }
+
+        public Permission(Class<?> ownerClass, long ownerId, Class<?> propertyClass) {
+            this(ownerClass, ownerId, propertyClass, 0, false);
+        }
+
+        public Permission(Class<?> ownerClass, Class<?> propertyClass, long propertyId) {
+            this(ownerClass, 0, propertyClass, propertyId, false);
+        }
+
+        public Permission excludeGroups() {
+            return new Permission(this.ownerClass, this.ownerId, this.propertyClass, this.propertyId, true);
+        }
+
+        public Class<?> getOwnerClass() {
+            return ownerClass;
+        }
+
+        public long getOwnerId() {
+            return ownerId;
+        }
+
+        public Class<?> getPropertyClass() {
+            return propertyClass;
+        }
+
+        public long getPropertyId() {
+            return propertyId;
+        }
+
+        public boolean getIncludeGroups() {
+            boolean ownerGroupModel = GroupedModel.class.isAssignableFrom(ownerClass);
+            boolean propertyGroupModel = GroupedModel.class.isAssignableFrom(propertyClass);
+            return (ownerGroupModel || propertyGroupModel) && !excludeGroups;
+        }
+    }
+
+    class LatestPositions implements Condition {
+        private final long deviceId;
+
+        public LatestPositions(long deviceId) {
+            this.deviceId = deviceId;
+        }
+
+        public LatestPositions() {
+            this(0);
+        }
+
+        public long getDeviceId() {
+            return deviceId;
+        }
+    }
+
 }