Feature Idea: Bidirectional Sync between Nextcloud Deck and Mattermost Boards Plugin

🚀 Feature Idea: Bidirectional Sync between Nextcloud Deck and Mattermost Boards Plugin

Is your feature request related to a problem? Please describe.

Teams frequently use both Nextcloud Deck for task/project planning and Mattermost (with its Boards plugin) for team communication and lightweight task management. Currently, there is no way to sync tasks or boards between these two platforms, causing duplicated effort and fractured workflows.

Describe the solution you'd like

Implement bidirectional synchronization between Nextcloud Deck and the Mattermost Boards plugin, allowing users to:

• Sync boards and cards (tasks) between Deck and Mattermost Boards
• Preserve key metadata such as titles, descriptions, due dates, assignees, statuses, and comments
• Choose one-way or two-way sync modes
• Manage sync settings through a user-friendly UI within Nextcloud Deck

This could be realized as a Nextcloud app or integration module that authenticates with Mattermost APIs and translates data models accordingly.

Describe alternatives you've considered

• Manually exporting/importing board data (cumbersome and error-prone)
• Using third-party proprietary integrations (lack of privacy, not open source)
• Relying solely on one platform (forces users to switch tools, reducing productivity)

Additional context

• Mattermost Boards is based on Focalboard technology and exposes structured data about boards and cards: https://github.com/mattermost/mattermost-plugin-boards
• Nextcloud Deck provides REST APIs for boards and cards: https://docs.nextcloud.com/server/latest/developer_manual/api/deck/index.html
• Open-source interoperability supports user data ownership and reduces vendor lock-in
• Similar syncs between open-source Kanban tools are rare but highly requested by users working across multiple platforms

Start by reviewing the linked Mattermost Boards issue and the Nextcloud Deck REST API documentation to compare board and card models, authentication, and available metadata. The issue names no repository files or tests; done would require an agreed integration scope covering synchronization direction, settings, and the listed board and card fields.