chrono-node
Version:
A natural language date parser in Javascript
34 lines • 1.59 kB
JavaScript
import { TIME_UNIT_DICTIONARY, NUMBER_PATTERN, parseDuration } from "../constants.js";
import { ParsingComponents } from "../../../results.js";
import { AbstractParserWithWordBoundaryChecking } from "../../../common/parsers/AbstractParserWithWordBoundary.js";
import { reverseDuration } from "../../../calculation/duration.js";
import { matchAnyPattern } from "../../../utils/pattern.js";
const CASUAL_UNIT_PATTERN = "(?:" + NUMBER_PATTERN + "\\s{0,5})?(?:" + matchAnyPattern(TIME_UNIT_DICTIONARY) + ")";
const PATTERN = new RegExp("(này|trước|qua|sau|tới|tiếp)\\s*(" +
CASUAL_UNIT_PATTERN +
")" +
"|(" +
CASUAL_UNIT_PATTERN +
")\\s*(này|trước|qua|sau|tới|tiếp)" +
"(?=\\W|$)", "i");
export default class VITimeUnitCasualRelativeFormatParser extends AbstractParserWithWordBoundaryChecking {
innerPattern() {
return PATTERN;
}
innerExtract(context, match) {
const modifier = (match[1] || match[4] || "").toLowerCase();
const unitText = (match[2] || match[3] || "").toLowerCase();
let duration = parseDuration(unitText);
if (Object.keys(duration).length === 0) {
const unit = TIME_UNIT_DICTIONARY[unitText];
if (!unit)
return null;
duration = { [unit]: 1 };
}
if (modifier === "trước" || modifier === "qua") {
duration = reverseDuration(duration);
}
return ParsingComponents.createRelativeFromReference(context.reference, duration);
}
}
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