From 2e769ee25bf7d134e4625cc5814661588adf7794 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Tue, 15 Feb 2022 23:17:31 -0800
Subject: Implement memory permissions

---
 src/main/java/org/traccar/model/Pair.java          | 44 ++++++++++++++++++++++
 .../java/org/traccar/storage/MemoryStorage.java    | 36 +++++++++++++-----
 2 files changed, 70 insertions(+), 10 deletions(-)
 create mode 100644 src/main/java/org/traccar/model/Pair.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/traccar/model/Pair.java b/src/main/java/org/traccar/model/Pair.java
new file mode 100644
index 000000000..fa856db96
--- /dev/null
+++ b/src/main/java/org/traccar/model/Pair.java
@@ -0,0 +1,44 @@
+package org.traccar.model;
+
+import java.util.Objects;
+
+public class Pair<K, V> {
+
+    private final K first;
+    private final V second;
+
+    public Pair(K first, V second) {
+        this.first = first;
+        this.second = second;
+    }
+
+    public K getFirst() {
+        return first;
+    }
+
+    public V getSecond() {
+        return second;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Pair pair = (Pair) o;
+
+        if (!Objects.equals(first, pair.first)) return false;
+        if (!Objects.equals(second, pair.second)) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = first != null ? first.hashCode() : 0;
+        result = 31 * result + (second != null ? second.hashCode() : 0);
+        return result;
+    }
+
+}
diff --git a/src/main/java/org/traccar/storage/MemoryStorage.java b/src/main/java/org/traccar/storage/MemoryStorage.java
index 0a2e5a81f..9cfe30a2b 100644
--- a/src/main/java/org/traccar/storage/MemoryStorage.java
+++ b/src/main/java/org/traccar/storage/MemoryStorage.java
@@ -1,43 +1,59 @@
 package org.traccar.storage;
 
+import org.traccar.model.Pair;
 import org.traccar.model.Permission;
 import org.traccar.storage.query.Request;
 
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
 
 public class MemoryStorage extends Storage {
 
+    private final Map<Pair<Class<?>, Class<?>>, Set<Pair<Long, Long>>> permissions = new HashMap<>();
+
     @Override
-    public <T> List<T> getObjects(Class<T> clazz, Request request) throws StorageException {
+    public <T> List<T> getObjects(Class<T> clazz, Request request) {
         return null;
     }
 
     @Override
-    public <T> long addObject(T entity, Request request) throws StorageException {
+    public <T> long addObject(T entity, Request request) {
         return 0;
     }
 
     @Override
-    public <T> void updateObject(T entity, Request request) throws StorageException {
+    public <T> void updateObject(T entity, Request request) {
     }
 
     @Override
-    public void removeObject(Class<?> clazz, Request request) throws StorageException {
+    public void removeObject(Class<?> clazz, Request request) {
     }
 
-    @Override
-    public List<Permission> getPermissions(Class<?> ownerClass, Class<?> propertyClass) throws StorageException {
-        return null;
+    private Set<Pair<Long, Long>> getPermissionsSet(Class<?> ownerClass, Class<?> propertyClass) {
+        return permissions.computeIfAbsent(new Pair<>(ownerClass, propertyClass), k -> new HashSet<>());
     }
 
     @Override
-    public void addPermission(Permission permission) throws StorageException {
-
+    public List<Permission> getPermissions(Class<?> ownerClass, Class<?> propertyClass) {
+        return getPermissionsSet(ownerClass, propertyClass).stream()
+                .map(pair -> new Permission(ownerClass, pair.getFirst(), propertyClass, pair.getSecond()))
+                .collect(Collectors.toList());
     }
 
     @Override
-    public void removePermission(Permission permission) throws StorageException {
+    public void addPermission(Permission permission) {
+        getPermissionsSet(permission.getOwnerClass(), permission.getPropertyClass())
+                .add(new Pair<>(permission.getOwnerId(), permission.getPropertyId()));
+    }
 
+    @Override
+    public void removePermission(Permission permission) {
+        getPermissionsSet(permission.getOwnerClass(), permission.getPropertyClass())
+                .remove(new Pair<>(permission.getOwnerId(), permission.getPropertyId()));
     }
 
 }
-- 
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