chrono-node
Version:
A natural language date parser in Javascript
74 lines • 2.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const years_1 = require("../../calculation/years");
const PATTERN = new RegExp("([^\\d]|^)" +
"([0-3]{0,1}[0-9]{1})[\\/\\.\\-]([0-3]{0,1}[0-9]{1})" +
"(?:[\\/\\.\\-]([0-9]{4}|[0-9]{2}))?" +
"(\\W|$)", "i");
const OPENING_GROUP = 1;
const ENDING_GROUP = 5;
const FIRST_NUMBERS_GROUP = 2;
const SECOND_NUMBERS_GROUP = 3;
const YEAR_GROUP = 4;
class SlashDateFormatParser {
constructor(littleEndian) {
this.groupNumberMonth = littleEndian ? SECOND_NUMBERS_GROUP : FIRST_NUMBERS_GROUP;
this.groupNumberDay = littleEndian ? FIRST_NUMBERS_GROUP : SECOND_NUMBERS_GROUP;
}
pattern() {
return PATTERN;
}
extract(context, match) {
const index = match.index + match[OPENING_GROUP].length;
const indexEnd = match.index + match[0].length - match[ENDING_GROUP].length;
if (index > 0) {
const textBefore = context.text.substring(0, index);
if (textBefore.match("\\d/?$")) {
return;
}
}
if (indexEnd < context.text.length) {
const textAfter = context.text.substring(indexEnd);
if (textAfter.match("^/?\\d")) {
return;
}
}
const text = context.text.substring(index, indexEnd);
if (text.match(/^\d\.\d$/) || text.match(/^\d\.\d{1,2}\.\d{1,2}\s*$/)) {
return;
}
if (!match[YEAR_GROUP] && text.indexOf("/") < 0) {
return;
}
const result = context.createParsingResult(index, text);
let month = parseInt(match[this.groupNumberMonth]);
let day = parseInt(match[this.groupNumberDay]);
if (month < 1 || month > 12) {
if (month > 12) {
if (day >= 1 && day <= 12 && month <= 31) {
[day, month] = [month, day];
}
else {
return null;
}
}
}
if (day < 1 || day > 31) {
return null;
}
result.start.assign("day", day);
result.start.assign("month", month);
if (match[YEAR_GROUP]) {
const rawYearNumber = parseInt(match[YEAR_GROUP]);
const year = years_1.findMostLikelyADYear(rawYearNumber);
result.start.assign("year", year);
}
else {
const year = years_1.findYearClosestToRef(context.refDate, day, month);
result.start.imply("year", year);
}
return result;
}
}
exports.default = SlashDateFormatParser;
//# sourceMappingURL=SlashDateFormatParser.js.map