Orders list filtering (based on order status) - No UI

[astralbodies]

Add the ability to pass Order Status filters into the view.

• No UI, just the capability
• Filter based on 1 or more status items.

Based on: https://github.com/woocommerce/woocommerce-mobile/issues/89

FluxC

• Add support for passing an order status filter to the API. Response payloads should also include the applied filter.
• Add Instrumentation tests where necessary
• Add some test features to the example app

UI

• Add support for passing a filter when fetching fresh orders from the api
• Add support for passing a filter to query the database
• Retain applied order status filter across device configurations
• The OrderListFragment should support setting an order status filter on creation

[aforcier]

@olaolusoga @astralbodies:

@AmandaRiu and I were discussing this item and it doesn't look like we have any design for it. Is this something we want in the MVLP?

[astralbodies]

@aforcier I think the idea behind this one was the list is capable of being filtered but there isn't necessarily a UI component to it. When I tap on "orders to fulfill" from the dashboard it'll be filtered. But that does bring up a good point .... do we want the user to be able to filter/sort the list differently.

[AmandaRiu]

@astralbodies @aforcier I'll update this ticket to reflect this is non-UI and capability only so I can move forward with it when ready. If a UI component is eventually added that can be a new ticket :)

[aforcier]

In terms of FluxC, there will be helper methods available to return all orders matching one or more statuses from the database. A more advanced addition will be to also allow fetching more orders matching some set of statuses from the server (so if you're in the "On Hold"-filtered view and swipe to the bottom, we'll fetch more "on hold" orders for you specifically).