[UWP][Fallback Requirements] Change requirements handling from a function to a property

[RebeccaAnne]

Platform

What platform is your issue or question related to? (Delete other platforms).

• UWP

Details

Currently IAdaptiveCardElement has a MeetsRequirements() method on it to determine whether the element meets its requirements. For our known types, a single implementation exists in the base class that is used by all elements. For custom types, however, defining the requirement handling this way requires custom type developers to provide their own implementation of MeetsRequirements for their type.

To address this, we should change the MeetsRequirements function to a Requirements property which simply contains the requirements. We can then run our logic on that property to determine if it meets the requirements, removing the need from third party developers to understand and re-implement that logic in their own types.

[RebeccaAnne]

The current design also prevents callers from adding requirements programmatically using the object model.

[ghost]

🎉AdaptiveCards@2020.07 has been released which fixes this issue.:tada:

Handy links:

• Release Notes
• AdaptiveCards Website
• Official NPM Designer Release
• Official NPM Templating Release
• Official NPM Renderer Release
• Official Nuget Templating Release
• Official Nuget Renderer Release
• Official Maven Renderer Release
• Official CocoaPod Renderer Release