Use PermissionDescriptor instead of String

scm-webapp/src/main/java/sonia/scm/security/PermissionAssigner.java

@@ -0,0 +1,35 @@
+package sonia.scm.security;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class PermissionAssigner {
+
+  private final SecuritySystem securitySystem;
+
+  public PermissionAssigner(SecuritySystem securitySystem) {
+    this.securitySystem = securitySystem;
+  }
+
+  public Collection<PermissionDescriptor> getAvailablePermissions() {
+    return securitySystem.getAvailablePermissions();
+  }
+
+  public Collection<PermissionDescriptor> readPermissionsForUser(String id) {
+    return securitySystem.getPermissions(p -> !p.isGroupPermission() && p.getName().equals(id)).stream().map(AssignedPermission::getPermission).collect(Collectors.toSet());
+  }
+
+  public void setPermissionsForUser(String id, Collection<PermissionDescriptor> permissions) {
+    Collection<AssignedPermission> existingPermissions = securitySystem.getPermissions(p -> !p.isGroupPermission() && p.getName().equals(id));
+    List<AssignedPermission> toRemove = existingPermissions.stream()
+      .filter(p -> !permissions.contains(p.getPermission()))
+      .collect(Collectors.toList());
+    toRemove.forEach(securitySystem::deletePermission);
+
+    permissions.stream()
+      .map(p -> new AssignedPermission(id, false, p))
+      .filter(p -> !existingPermissions.contains(p))
+      .forEach(securitySystem::addPermission);
+  }
+}