[Feature]: Implement Connect/workbench/shinyapps.io (hosted) bookmark integrations

[schloerke]

Related R implementation: https://github.com/posit-dev/connect/blob/8de330aec6a61cf21e160b5081d08a1d3d7e8129/R/connect.R#L915

Location for Python implementation: https://github.com/posit-dev/connect/blob/49d698dd950351bf781759f18432b13070900486/python/connect_fastapi_runtime.py#L588-L597

Ex implementation:

@shiny.bookmark.set_global_save_dir_fn
def connect_save_shiny_bookmark(id: str) -> Path:
    path = Path("connect") / id
    path.mkdir(parents=True, exist_ok=True)
    return path
@shiny.bookmark.set_global_restore_dir_fn
def connect_restore_shiny_bookmark(id: str) -> Path:
    return Path("connect") / id

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Once fixed within Connect's repo, Workbench and shinyapps.io will get the upgrade for free.

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For anyone coming to this issue on how to perform custom integration, please use :

# Make an app with bookmarking enabled
app = App(ui, server, bookmark_store="url")

# Set save/restore functions
app.set_global_save_dir_fn(save_bookmark_dir)
app.set_global_restore_dir_fn(restore_bookmark_dir)

If this is impossible for you, please make an issue for discussion as we're trying to minimize global state as much as possible.

This is tolerable as it is setting the default state... not necessarily storing per-session information.

[schloerke]

(Work with @karangattu on testing within Connect when it is implemented)

[schloerke]

Issue: https://github.com/posit-dev/connect/issues/30949

PR: https://github.com/posit-dev/connect/pull/30950

[schloerke]

Update: Connect team has verbally approved of PR. Waiting a couple weeks before hopefully having it merged in the 2025.04 release at the end of the month.

[schloerke]

Shinyapps.io ex: https://barret.shinyapps.io/test-py-shiny-bookmarking/?_inputs_&letter=%22B%22&_values_&lowercase=%22b%22