Gracefully handle device out of space for sync or download

[MTRichards]

As an ownCloud user, I want to have my iOS device to gracefully handle the case where I am out of disk space so that my device and ownCloud app do not crash when I fill storage with ownCloud synced files

Acceptance Criteria:

• ownCloud monitors amount of free disk space on the iOS device
• New internal option allows us to set the amount of free space for the app to leave empty (default is 500 MB - we can adjust later if that is not enough) - the app will leave 500MB free even when reporting no more free space
• When the device recognizes that syncing or downloading any additional files requested by the user will cause an "out of space" situation, the user is warned
• Warning appears as a popup on top of the app, and says "Automatic syncing is disabled because ownCloud is out of free space. Syncing will automatically resume once enough free space is available."
• Warning has an OK button
• Once the user removes some files from the device, or changes the "free space" setting above, syncing will resume until the device again finds a free space warning.

@jancborchardt @rperezb

[rperezb]

Some doubts:

• will this option be included under the new section: sync settings
• How it has to be shown for the users? A text field with 500 MB by default? so if a user wants to disable it, they will set it to 0. Something similar to the desktop client thx

[MTRichards]

I think it should be under sync settings, that would make the most sense, though it also has an impact for general downloads.

[MTRichards]

How it has to be shown for the users? A text field with 500 MB by default? so if a user wants to disable it, they will set it to 0. Something similar to the desktop client thx

Ideally there is no user editable setting. I initially had it as an editable setting, but then removed the editable setting to keep things simpler/ @jancborchardt your thoughts on this?

[jancborchardt]

Yeah, I also like that we just choose 500MB as sane setting and don’t expose a setting for this. It makes no sense for people to be able to set that they want their whole storage be filled up by ownCloud – it’s just going to be frustrating.