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export function convertBase({ value, fromBase, toBase }: { value: string; fromBase: number; toBase: number }) {
const range = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+/'.split('');
const fromRange = range.slice(0, fromBase);
const toRange = range.slice(0, toBase);
let decValue = value
.split('')
.reverse()
.reduce((carry: number, digit: string, index: number) => {
if (!fromRange.includes(digit)) {
throw new Error(`Invalid digit "${digit}" for base ${fromBase}.`);
}
return (carry += fromRange.indexOf(digit) * fromBase ** index);
}, 0);
let newValue = '';
while (decValue > 0) {
newValue = toRange[decValue % toBase] + newValue;
decValue = (decValue - (decValue % toBase)) / toBase;
}
return newValue || '0';
}
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