# Events & Notifications

Events are used in the [communication](https://appflowy.gitbook.io/docs/essential-documentation/contribute-to-appflowy/architecture/frontend/inter-process-communication) between the frontend and the backend. If you interested in the process about generating the events files, please check [this](https://appflowy.gitbook.io/docs/essential-documentation/contribute-to-appflowy/architecture/backend/event) out.

This document explains the events and notifications defined in the Folder scope.

## Events

| FolderEvent          |                                                                   |
| -------------------- | ----------------------------------------------------------------- |
| CreateWorkspace      | Create a new workspace                                            |
| ReadCurrentWorkspace | Read the current opening workspace                                |
| OpenWorkspace        | Open the workspace and mark it as the current workspace           |
| ReadWorkspaceApps    | Return a list of apps that belong to this workspace               |
| CreateApp            | Create a new app                                                  |
| DeleteApp            | Delete the app                                                    |
| ReadApp              | Return the app info                                               |
| UpdateApp            | Update the app's properties including the name,description, etc.  |
| CreateView           | Create a new view in the corresponding app                        |
| ReadView             | Return the view info                                              |
| UpdateView           | Update the view's properties including the name,description, etc. |
| DeleteView           | Move the view to the trash folder                                 |
| DuplicateView        | Duplicate the view                                                |
| CloseView            | Close and release the resources that are used by this view        |
| SetLatestView        | Set the current visiting view                                     |
| MoveItem             | Move the view or app to another place                             |
| ReadTrash            | Read the trash that was deleted by the user                       |
| PutbackTrash         | Put back the trash to the origin folder                           |
| DeleteTrash          | Delete the trash from the disk                                    |
| RestoreAllTrash      | Put back all the trash to its original folder                     |
| DeleteAllTrash       | Delete all the trash from the disk                                |

## Notifications

| FolderNotification        |                                                                                                             |
| ------------------------- | ----------------------------------------------------------------------------------------------------------- |
| DidCreateWorkspace        | Trigger after creating a workspace                                                                          |
| DidDeleteWorkspace        | Trigger after deleting a workspace                                                                          |
| DidUpdateWorkspace        | Trigger after updating a workspace                                                                          |
| DidUpdateWorkspaceApps    | Trigger when the number of apps of the workspace is changed                                                 |
| DidUpdateWorkspaceSetting | Trigger when the settings of the workspace are changed. The changes including the latest visiting view, etc |
| DidUpdateApp              | Trigger when the properties including rename,update description of the app are changed                      |
| DidUpdateView             | Trigger when the properties including rename,update description of the view are changed                     |
| DidDeleteView             | Trigger after deleting the view                                                                             |
| DidRestoreView            | Trigger when restore the view from trash                                                                    |
| DidMoveViewToTrash        | Trigger after moving the view to trash                                                                      |
| DidUpdateTrash            | Trigger when the number of trash is changed                                                                 |