chrono-node
Version:
A natural language date parser in Javascript
34 lines • 1.56 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const constants_1 = require("../constants");
const results_1 = require("../../../results");
const AbstractParserWithWordBoundary_1 = require("../../../common/parsers/AbstractParserWithWordBoundary");
const timeunits_1 = require("../../../utils/timeunits");
const PATTERN = new RegExp(`(this|last|past|next|after|\\+|-)\\s*(${constants_1.TIME_UNITS_PATTERN})(?=\\W|$)`, "i");
const PATTERN_NO_ABBR = new RegExp(`(this|last|past|next|after|\\+|-)\\s*(${constants_1.TIME_UNITS_NO_ABBR_PATTERN})(?=\\W|$)`, "i");
class ENTimeUnitCasualRelativeFormatParser extends AbstractParserWithWordBoundary_1.AbstractParserWithWordBoundaryChecking {
constructor(allowAbbreviations = true) {
super();
this.allowAbbreviations = allowAbbreviations;
}
innerPattern() {
return this.allowAbbreviations ? PATTERN : PATTERN_NO_ABBR;
}
innerExtract(context, match) {
const prefix = match[1].toLowerCase();
let timeUnits = constants_1.parseTimeUnits(match[2]);
if (!timeUnits) {
return null;
}
switch (prefix) {
case "last":
case "past":
case "-":
timeUnits = timeunits_1.reverseTimeUnits(timeUnits);
break;
}
return results_1.ParsingComponents.createRelativeFromReference(context.reference, timeUnits);
}
}
exports.default = ENTimeUnitCasualRelativeFormatParser;
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