60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
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import RollTerm from "./term.mjs";
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/**
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* A type of RollTerm used to represent static numbers.
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* @extends {RollTerm}
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*/
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export default class NumericTerm extends RollTerm {
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constructor({number, options}={}) {
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super({options});
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this.number = Number(number);
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}
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/**
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* The term's numeric value.
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* @type {number}
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*/
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number;
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/** @inheritdoc */
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static REGEXP = new RegExp(`^([0-9]+(?:\\.[0-9]+)?)${RollTerm.FLAVOR_REGEXP_STRING}?$`);
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/** @inheritdoc */
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static SERIALIZE_ATTRIBUTES = ["number"];
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/** @inheritdoc */
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get expression() {
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return String(this.number);
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}
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/** @inheritdoc */
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get total() {
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return this.number;
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}
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/* -------------------------------------------- */
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/* Factory Methods */
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/* -------------------------------------------- */
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/**
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* Determine whether a string expression matches a NumericTerm
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* @param {string} expression The expression to parse
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* @returns {RegExpMatchArray|null}
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*/
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static matchTerm(expression) {
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return expression.match(this.REGEXP) || null;
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}
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/* -------------------------------------------- */
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/**
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* Construct a term of this type given a matched regular expression array.
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* @param {RegExpMatchArray} match The matched regular expression array
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* @returns {NumericTerm} The constructed term
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*/
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static fromMatch(match) {
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const [number, flavor] = match.slice(1);
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return new this({number, options: {flavor}});
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}
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}
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