open tasks for rework

This are the open tasks that we need to finish before the rework branch can be merged. If you want to help, just edit this issue, add yourself to a task and start coding! 😄 See the pull request of the branch: https://github.com/owncloud/calendar/pull/521

Server-side

Task	Description	Time required	Assigned to	Current Status
Calendar Cache	Proper calendar cache with Watcher, Scanner and Updater	> 5 hours	@georgehrke	✅
Object Cache	Proper object cache with Watcher, Scanner and Updater	> 5 hours	@georgehrke	✅
Port Sharing		~2-5 hours
Port CalDAV	Port caldav implementation, add description support, preferably using public API	~2-5 hours
Port Migration	Existing calendar-tables didn't change structure, so the existing migrate.php is still working. We should consider adding Subscription-information to migration as well	< 2 hours
Upgrade Script	Clean-up what's broken in existing installations	< 2 hours
WebCal Backend		< 2 hours
Contacts Backend	See current implementation	0.5 hours	@DeepDiver1975	✅
Write Public API	API Design needs discussion, should be similar to Contacts API	~2-5 hours
Background Jobs	Make use of BackgroundJobs to update calendars and objects	~2-5 hours
Tests	Get Test coverage to > 95%	Unknown	everyone

Client-side

Task	Description	Time required	Assigned to	Current Status
Calendar Sharing Front-end	Yet to discuss with georg about the interaction.	> 5 hours	@georgehrke & @raghunayyar	waiting for back-end / API implementation
Stylise autocomplete dropdown	-	~1-2 hours	@raghunayyar	✅
Enabling disabling subscriptions	same logic as calendars, obviously	~ 2-3hours	@raghunayyar	✅
Implement Multiple uploads	-	~2-3 hours	@raghunayyar	WIP
Implement Repeating Events Dialog	Facing some issue uploading such event's .ics files	~2-3 hours	@raghunayyar & @georgehrke	-
beautify events editor further	-	~2-3 hours	@raghunayyar	WIP
finish editing events dialog	implement the post request in the desired format / standards	~2-3 hours	@raghunayyar and @georgehrke	WIP
Implement Create Events	Can start once editing is over	~2-3 hours	@raghunayyar	Depends on previous task
Restructure FullCalendar Heightwise	Exactly the way its fixed in master	~1-2 hours	@jbtbnl	yet to start
JavaScript Unit Tests	Get all controllers, Services, Directives and Filters covered	> 5 hours	everyone	in progress