[1.12.2] Block models: Vanilla multipart with block variant

[Aarilight]

The block I have is based on endersteel bars from vanilla, here's the current blockstate:

{
	"multipart": [
		{   "apply": { "model": "soulus:bars_endersteel_post_ends" }},
		{   "when": { "north": false, "east": false, "south": false, "west": false },
			"apply": { "model": "soulus:bars_endersteel_post" }
		},
		{   "when": { "north": true, "east": false, "south": false, "west": false },
			"apply": { "model": "soulus:bars_endersteel_cap" }
		},
		{   "when": { "north": false, "east": true, "south": false, "west": false },
			"apply": { "model": "soulus:bars_endersteel_cap", "y": 90 }
		},
		{   "when": { "north": false, "east": false, "south": true, "west": false },
			"apply": { "model": "soulus:bars_endersteel_cap_alt" }
		},
		{   "when": { "north": false, "east": false, "south": false, "west": true },
			"apply": { "model": "soulus:bars_endersteel_cap_alt", "y": 90 }
		},
		{   "when": { "north": true },
			"apply": { "model": "soulus:bars_endersteel_side" }
		},
		{   "when": { "east": true },
			"apply": { "model": "soulus:bars_endersteel_side", "y": 90 }
		},
		{   "when": { "south": true },
			"apply": { "model": "soulus:bars_endersteel_side_alt" }
		},
		{   "when": { "west": true },
			"apply": { "model": "soulus:bars_endersteel_side_alt", "y": 90 }
		}
	]
}

 

I want to add variants for the block, eg, my enum:

NORMAL(0, "normal"), 
WOOD(1, "wood"), 
STONE(2, "stone"), 
END_STONE(3, "end_stone"), 
BLAZE(4, "blaze");

 

How can I combine the multipart and block variation? I was looking at Choonster's block variant example: https://github.com/Choonster-Minecraft-Mods/TestMod3/blob/1.12.2/src/main/resources/assets/testmod3/blockstates/variants.json, this makes me think I have to copy the whole multipart thing for every variation, is this the case, or is there a simpler way to write this?