JASS Scripting Soul Gems/Enchanting

Ok, I am a master of being a noob at JASS. I tried to learn once and it went over my head. SO, I learnt HTML, got really good at it, and started learning PHP because apparently it gets easier to more you know (Plus, I learnt real BASIC and Lingo).

Now, down to the point. I am trying to make a Soul capture, Soul Gem, Enchanting system. Basically, the GUI triggers, if I could make them (because some of the functions I need to make don't seem to be there) would look like this:

Trigger = Capture Soul (generic) (generic) means any name so I don't have to write this out multiple times)

Events - unit obtains item = Soul (generic)
Conditions - (none)
Actions -
if - unit owns item = Soul Gem
then - remove item = Soul (generic)
- remove item = Soul Gem
- add item = (generic) Soul Gem (full)
- show message to triggering player = "You have captured a soul"
else - remove item = Soul (generic)
- show message to triggering player = "You have failed to capture a soul"

Because it would be a big work load if I asked for them all at once, so once someone have figured this out, I will submit the enchanting one.

If it helps, I was also going to make 4 different kinds of Soul:
Common
Grand
Divine
Putrid


Thank you to anyone who figures this out.

What exactly do you want? If that's how you want your trigger to be then why not make it? And, if you want us to help you figure out a better way to make this system you're going to have to explain what you're trying to do. I've encountered completely different soul capture/soul gem concepts in several games so I'm not sure where you're going with it.

Well the reason I am unable to make it is because I cant find ways of doing so.

And I did tell you want I need... If you read the trigger, its what I need...

It's just a loop that checks items in slots and then some If/Then/Else checking; you should be able to figure it out...

Well thats the problem, I cant.