The "RC HVAC Manager" app does just what you describe. Unfortunately, @cybrmage seems to have left the community and withdrawn public distribution of his code. In the absence of a copyright statement or license, it would be inappropriate to create derivative works (and HE staff probably shouldn't look at the code, if HE is planning to produce & distribute a 'clean room' version that has similar functionality).
Having said all of that, there are plenty of examples of how RC HVAC Manager works in the [WITHDRAWN - Use the new Broadlink integration by @tomw] NATIVE Broadlink RM/RM Pro/RM Mini/SP driver thread, and a close reading will point to the source code for the last released version.
