[WA2] Incooperating missing health, and more, in a custom trigger

[Deleted]

Hey.
I am looking for help regarding a custom trigger in WeakAuras. I want the trigger to hide the display under 4 circumstances:

1. Player has target (done)
2. Player is casting
3. Player is wounded
4. Player is in combat

I'm halfway there, I feel. Here is what I already have (can't post links, sorry):
Custom trigger
function()
local connector_hide = false

if(UnitExists("target")) then
connector_hide = 1
end;

return connector_hide
end

Custom untrigger
function()
local connector_hide = false

if(UnitExists("target")) then
connector_hide = 1
end;

return connector_hide
end


I already got the hide part to work, and I already got the has target part to work.

Now I am just missing the other 3 circumstances, and can't for the life of me find what their "functions" are called: for example, 'player has target' becoming UnitExists("target").

Any help is much appriciated.

[Brase]

is casting: wowwiki.wikia.com/wiki/API_UnitCastingInfo

is wounded: wowwiki.wikia.com/wiki/API_UnitHealthMax and wowwiki.wikia.com/wiki/API_UnitHealth

is in combat: wowwiki.wikia.com/wiki/API_UnitAffectingCombat