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smov/plugins/figmaTokensToThemeTokens.mjs

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JavaScript

/**
* This script turns output from the figma plugin "style to JSON" into a usuable theme.
* It expects a format of "themes/{NAME}/anythinghere"
*/
import fs from "fs";
const fileLocation = "./figmaTokens.json";
const theme = "blue";
const fileContents = fs.readFileSync(fileLocation, {
encoding: "utf-8"
});
const tokens = JSON.parse(fileContents);
const themeTokens = tokens.themes[theme];
const output = {};
function setKey(obj, key, defaultVal) {
const realKey = key.match(/^\d+$/g) ? "c" + key : key;
if (obj[key]) return obj[key];
obj[realKey] = defaultVal;
return obj[realKey];
}
function handleToken(token, path) {
if (typeof token.name === "string" && typeof token.description === "string") {
let ref = output;
const lastKey = path.pop();
path.forEach((v) => {
ref = setKey(ref, v, {});
});
setKey(ref, lastKey, token.hex);
return;
}
for (let key in token) {
handleToken(token[key], [...path, key]);
}
}
handleToken(themeTokens, []);
console.log(JSON.stringify(output, null, 2));