33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
import replaceBareSymbolsWithValueAccessor from '/imports/api/creature/computation/utility/replaceBareSymbolsWithValueAccessor.js';
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import computeStat from '/imports/api/creature/computation/computeStat.js';
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import * as math from 'mathjs';
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export default function evaluateCalculation(string, memo){
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if (!string) return string;
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// Parse the string using mathjs
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let calc;
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try {
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calc = math.parse(string);
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} catch (e) {
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console.error(e);
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return string;
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}
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// Ensure all symbol nodes are defined and coputed
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calc.traverse(node => {
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if (node.isSymbolNode){
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let stat = memo.statsByVariableName[node.name];
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if (stat && !stat.computationDetails.computed){
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computeStat(stat, memo);
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}
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}
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});
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// Ensure any bare symbols are value accessors instead
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let substitutedCalc = calc.transform(replaceBareSymbolsWithValueAccessor);
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// Evaluate the expression to a number or return with substitutions
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try {
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return substitutedCalc.evaluate(memo.statsByVariableName);
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} catch (e){
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return substitutedCalc.toString();
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}
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}
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