Aspects purely related to controller conditions (minimal package).
Controllers update models and views, and the conditions/event handlers can work both ways. Before Keera Hails' reactive values were introduced, I used directional conditions to keep models and views in sync. Since most update operations in one direction were almost verbatim copies of update operations in the other direction, I often decided to create only one and pass the direction of the update as a parameter.
This package contains that pattern: direction of updates in MVC Controller's handlers. It is only useful in combination with the rest of Keera Hails suite.
It has no strange dependencies, so you should be able to install it normally with cabal. It is not in hackage, so you'll have to clone the repo first.
$ git clone [email protected]:keera-studios/hails-mvc-controller.git
$ cd hails-mvc-controller
$ cabal install
(Note: I prefer to use cabal-dev or cabal sandboxes, and I recommend that you do the same.)