File system warnings for moves of shared content items

A system for synchronizing shared content item changes from a client device to a content management system, the system comprising:

• a processor;
• a storage index configured to store a log of all content item changes synchronized to the content management system, the storage index including a unique identifier for each content item, and a system file path identifying a location in a storage of the client device that a copy of a shared content item is stored;
• an operating system of the client device having a kernel layer for managing file system events and I/O events for the storage, and an application layer for executing application instructions;
• and
• a content item synchronization service resident in the application layer and configured to:
• detect a content item change event on the client device, wherein the content item change event is associated with a user account of the content management system and wherein the content item change event pertains to a shared content item accessible to at least one other user account of the content management system,
• compare a source file system path for the content item change event with a destination file system path for the content item change event to determine a canonical move causing the content item change event, wherein the destination file system path is accessible to the user account,
• determine that the move causing the content item change event will result in making the shared content item unavailable to the at least one other user account of the content management system,
• after determining that the move will result in making the shared content item unavailable, display a notification on the client device causing the content item change event, wherein the notification informs the user account associated with the content item change event that the content item change event will result in making the shared content item unavailable to the at least one other user account, and
• when a selection of the notification to undo the canonical move is received, return the content item to the source file system path, and when a selection of the notification to continue with the canonical move is received, synchronize the content item change event with the content management system.

A method comprising:

• detecting, by a content management synchronization service at a client device, a content item change event on the client device, wherein the content item change event is associated with a user account of a content management system and wherein the content item change pertains to a shared content item accessible to at least one other user account of the content management system;
• comparing, by the content management synchronization service, a source file system path for the content item change event with a destination file system path for the content item change event to determine a canonical move causing the content item change event;
• determining, by the content management synchronization service, that the content item change event is the canonical move of the content item from the source file system path that is shared with the at least one other user account to the destination file system path that is not shared with the at least one other user account causing the content item to become unavailable to the at least one other user account of the content management system, wherein the destination file system path is accessible to the user account;
• in response to determining that the content item change event will result in the shared content item being unavailable to the at least one other user account of the content management system, displaying a notification on the client device causing the content item change event, wherein the notification informs the user account associated with the content item change event that the content item change event will result in making the shared content item unavailable to the at least one other user account;
• and
• when a selection of the notification to undo the canonical move is received, returning the content item to the source file system path, and when a selection of the notification to continue with the canonical move is received, synchronizing the content item change event with the content management system.