OpenSim.Region.ScriptEngine.Shared.Api.LSL_Api.llRequestPermissions C# (CSharp) Method

        public void llRequestPermissions(string agent, int perm)
        {
            UUID agentID;

            if (!UUID.TryParse(agent, out agentID))
                return;

            if (agentID == UUID.Zero || perm == 0) // Releasing permissions
            {
                llReleaseControls();

                m_item.PermsGranter = UUID.Zero;
                m_item.PermsMask = 0;

                m_ScriptEngine.PostScriptEvent(m_item.ItemID, new EventParams(
                        "run_time_permissions", new Object[] {
                        new LSL_Integer(0) },
                        new DetectParams[0]));

                return;
            }

            if (m_item.PermsGranter != agentID || (perm & ScriptBaseClass.PERMISSION_TAKE_CONTROLS) == 0)
                llReleaseControls();

            m_host.AddScriptLPS(1);

            int implicitPerms = 0;

            if (m_host.ParentGroup.IsAttachment && (UUID)agent == m_host.ParentGroup.AttachedAvatar)
            {
                // When attached, certain permissions are implicit if requested from owner
                implicitPerms = ScriptBaseClass.PERMISSION_TAKE_CONTROLS |
                        ScriptBaseClass.PERMISSION_TRIGGER_ANIMATION |
                        ScriptBaseClass.PERMISSION_CONTROL_CAMERA |
                        ScriptBaseClass.PERMISSION_TRACK_CAMERA |
                        ScriptBaseClass.PERMISSION_ATTACH |
                        ScriptBaseClass.PERMISSION_OVERRIDE_ANIMATIONS;
            }
            else
            {
                if (m_host.ParentGroup.GetSittingAvatars().SingleOrDefault(sp => sp.UUID == agentID) != null)
                {
                    // When agent is sitting, certain permissions are implicit if requested from sitting agent
                    implicitPerms = ScriptBaseClass.PERMISSION_TRIGGER_ANIMATION |
                        ScriptBaseClass.PERMISSION_CONTROL_CAMERA |
                        ScriptBaseClass.PERMISSION_TRACK_CAMERA |
                        ScriptBaseClass.PERMISSION_TAKE_CONTROLS;
                }
                else
                {
                    if (World.GetExtraSetting("auto_grant_attach_perms") == "true")
                        implicitPerms = ScriptBaseClass.PERMISSION_ATTACH;
                }
                if (World.GetExtraSetting("auto_grant_all_perms") == "true")
                {
                    implicitPerms = perm;
                }
            }

            if ((perm & (~implicitPerms)) == 0) // Requested only implicit perms
            {
                m_host.TaskInventory.LockItemsForWrite(true);
                m_host.TaskInventory[m_item.ItemID].PermsGranter = agentID;
                m_host.TaskInventory[m_item.ItemID].PermsMask = perm;
                m_host.TaskInventory.LockItemsForWrite(false);

                m_ScriptEngine.PostScriptEvent(m_item.ItemID, new EventParams(
                        "run_time_permissions", new Object[] {
                        new LSL_Integer(perm) },
                        new DetectParams[0]));

                return;
            }

            ScenePresence presence = World.GetScenePresence(agentID);
            
            if (presence != null)
            {
                // If permissions are being requested from an NPC and were not implicitly granted above then
                // auto grant all requested permissions if the script is owned by the NPC or the NPCs owner
                INPCModule npcModule = World.RequestModuleInterface<INPCModule>();
                if (npcModule != null && npcModule.IsNPC(agentID, World))
                {
                    if (npcModule.CheckPermissions(agentID, m_host.OwnerID))
                    {
                        lock (m_host.TaskInventory)
                        {
                            m_host.TaskInventory[m_item.ItemID].PermsGranter = agentID;
                            m_host.TaskInventory[m_item.ItemID].PermsMask = perm;
                        }

                        m_ScriptEngine.PostScriptEvent(
                            m_item.ItemID,
                            new EventParams(
                                "run_time_permissions", new Object[] { new LSL_Integer(perm) }, new DetectParams[0]));
                    }

                    // it is an NPC, exit even if the permissions werent granted above, they are not going to answer
                    // the question!
                    return;
                }

                string ownerName = resolveName(m_host.ParentGroup.RootPart.OwnerID);
                if (ownerName == String.Empty)
                    ownerName = "(hippos)";

                if (!m_waitingForScriptAnswer)
                {
                    m_host.TaskInventory.LockItemsForWrite(true);
                    m_host.TaskInventory[m_item.ItemID].PermsGranter = agentID;
                    m_host.TaskInventory[m_item.ItemID].PermsMask = 0;
                    m_host.TaskInventory.LockItemsForWrite(false);

                    presence.ControllingClient.OnScriptAnswer += handleScriptAnswer;
                    m_waitingForScriptAnswer=true;
                }

                presence.ControllingClient.SendScriptQuestion(
                    m_host.UUID, m_host.ParentGroup.RootPart.Name, ownerName, m_item.ItemID, perm);

                return;
            }

            // Requested agent is not in range, refuse perms
            m_ScriptEngine.PostScriptEvent(
                m_item.ItemID,
                new EventParams("run_time_permissions", new Object[] { new LSL_Integer(0) }, new DetectParams[0]));
        }