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I have a problem I would like to solve on a technical level.

There is a set of resources. I use a single resource at given time. The resource is used for some time, then I switch to use another resource. After the switch the previous resource needs to regenerate for another period of time. The problem I would like to solve is to:
a) find the list of available resources (that means, all the items who has got enough of rest)
b) with the information how long resource has been in resting period.

Do you know if there is something in #HomeAssistant which would fulfil my needs? I am able to write some automations from scratch, but I am a little bit too lazy to do that right now