convertWB.js

'use strict'

const fs = require('fs');

let rawdata = fs.readFileSync('./WesterosBlocks.json');
let content = JSON.parse(rawdata);
let newcontent = { blocks: [] };

function makeName(label) {
    label = label.toLowerCase();
    label = label.replace(/\s+/g,"_");
    return label.replace(/[^0-9a-z_]/gi, '')
}
const skippedFields = [ 'blockName', 'blockID', 'blockIDs', 'subBlocks', 'modelBlockMeta' ];
const skippedSubBlockFields = [ 'meta' ];

let ids = new Set();

content.blocks.forEach(block => {
	// If stack, build stack data and drop extra subblocks
	if (block.blockType.includes("-stack")) {
		let first = block.subBlocks[0];
		first.stack = [];
		block.subBlocks.forEach(subblock => {
			let rec = { };
			if (subblock.textures) rec.textures = subblock.textures;
			if (subblock.boundingBox) rec.boundingBox = subblock.boundingBox;
			if (subblock.cuboids) rec.cuboids = subblock.cuboids;
			if (subblock.collisionBoxes) rec.collisionBoxes = subblock.collisionBoxes;
			delete subblock.textures;
			delete subblock.boundingBox;
			delete subblock.cuboids;
			delete subblock.collisionBoxes;
			first.stack.push(rec);
		});
		block.subBlocks = [ first ]; 			
	}
    block.subBlocks.forEach(subblock => {
        let newblock = { blockName: makeName(subblock.label) };
        let cnt = 1;
        while (ids.has(newblock.blockName)) {
            cnt++;
            newblock.blockName = makeName(subblock.label) + cnt;
        }
        ids.add(newblock.blockName);
        Object.keys(block).forEach(k => {
            if (skippedFields.includes(k)) return;
            newblock[k] = block[k];
        });
        Object.keys(subblock).forEach(k => {
            if (skippedSubBlockFields.includes(k)) return;
            newblock[k] = subblock[k];
        });
        newblock.legacyBlockID = block.blockName + ":" + subblock.meta;
        subblock.newName = newblock.blockName;	// Remember new name
        
        newcontent.blocks.push(newblock);
    });
});
// Second pass for sake of modelBlockNames
content.blocks.forEach(block => {
	if (block.modelBlockName) {
		let modelLegacyID = block.modelBlockName + ":" + block.modelBlockMeta;
		let model = newcontent.blocks.find(r => r.legacyBlockID == modelLegacyID);
		let modelID;
		if (model) {
			modelID = model.blockName;
		}
		else if (block.modelBlockName.startsWith("minecraft:")) {
			if (block.modelBlockName == 'minecraft:hardened_clay')
				modelID = 'minecraft:terracotta';
			else if (block.modelBlockName == 'minecraft:double_stone_slab')
				modelID = 'minecraft:stone_slab';
			else
				modelID = block.modelBlockName;
		}
		else {
			console.log(`Bad modelBlockName ${block.modelBlockName} for ${block.blockName}`);
		}
		if (modelID) {
			let newrec = newcontent.blocks.find(r => r.blockName == block.subBlocks[0].newName);
			newrec.modelBlockName = modelID;
		}
    }
});

console.log(JSON.stringify(newcontent, null, '    '));