Allow a rootless navigation structure

[Facundo Batista]

Currently, the 7digital scope is returning this structure for the categories/departments/navigation:

{'canned_query': 'scope://com.canonical.scopes.sevendigital',
 'label': 'All categories',
 'subdepartments': [{'canned_query': 'scope://com.canonical.scopes.sevendigital?dep=newreleases',
                     'has_subdepartments': False,
                     'label': 'New releases'},
                    {'canned_query': 'scope://com.canonical.scopes.sevendigital?dep=topalbums',
                     'has_subdepartments': False,
                     'label': 'Top albums'},
                    {'canned_query': 'scope://com.canonical.scopes.sevendigital?dep=toptracks',
                     'has_subdepartments': False,
                     'label': 'Top tracks'},
                    {'canned_query': 'scope://com.canonical.scopes.sevendigital?dep=genres',
                     'has_subdepartments': True,
                     'label': 'Genres'}]}

However, Design requested for this structure to be rootless, to don't have a "All categories" root in the beginning. Currently, if the server returns the needed structure, it doesn't work ok.

Talking with Pawel and Albert they agreed works needs to be done in this project for this to be possible.

[Facundo Batista (facundo)]

Related bugs in other projects:

https://bugs.launchpad.net/unity-scopes-shell/+bug/1364340
https://bugs.launchpad.net/unity-scopes-api/+bug/1364341

[Paweł Stołowski (stolowski)]

With filters support this could be re-designed to use option-selector filters:
- one option selector filter with new releases, top albums, top tracks, genres in it; selecting 'genres' creates additional option-selector filter with the list of genres in it.
- two option selector filters displayed all the time: one with new releases, top albums, top tracks, the other with the list of genres - makes sense so long as 7digital api allows browsing new releases/top albums/tracks and filtering by genre at the same time.

This is just an idea to consider. Allowing rootless departments will require significant investement in terms of implementation.