chrono-node
Version:
A natural language date parser in Javascript
205 lines • 7.08 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseTimeUnits = exports.TIME_UNITS_NO_ABBR_PATTERN = exports.TIME_UNITS_PATTERN = exports.parseYear = exports.YEAR_PATTERN = exports.parseOrdinalNumberPattern = exports.ORDINAL_NUMBER_PATTERN = exports.parseNumberPattern = exports.NUMBER_PATTERN = exports.TIME_UNIT_DICTIONARY = exports.TIME_UNIT_DICTIONARY_NO_ABBR = exports.ORDINAL_WORD_DICTIONARY = exports.INTEGER_WORD_DICTIONARY = exports.MONTH_DICTIONARY = exports.FULL_MONTH_NAME_DICTIONARY = exports.WEEKDAY_DICTIONARY = void 0;
const pattern_1 = require("../../utils/pattern");
const years_1 = require("../../calculation/years");
exports.WEEKDAY_DICTIONARY = {
sunday: 0,
sun: 0,
"sun.": 0,
monday: 1,
mon: 1,
"mon.": 1,
tuesday: 2,
tue: 2,
"tue.": 2,
wednesday: 3,
wed: 3,
"wed.": 3,
thursday: 4,
thurs: 4,
"thurs.": 4,
thur: 4,
"thur.": 4,
thu: 4,
"thu.": 4,
friday: 5,
fri: 5,
"fri.": 5,
saturday: 6,
sat: 6,
"sat.": 6,
};
exports.FULL_MONTH_NAME_DICTIONARY = {
january: 1,
february: 2,
march: 3,
april: 4,
may: 5,
june: 6,
july: 7,
august: 8,
september: 9,
october: 10,
november: 11,
december: 12,
};
exports.MONTH_DICTIONARY = Object.assign(Object.assign({}, exports.FULL_MONTH_NAME_DICTIONARY), { jan: 1, "jan.": 1, feb: 2, "feb.": 2, mar: 3, "mar.": 3, apr: 4, "apr.": 4, jun: 6, "jun.": 6, jul: 7, "jul.": 7, aug: 8, "aug.": 8, sep: 9, "sep.": 9, sept: 9, "sept.": 9, oct: 10, "oct.": 10, nov: 11, "nov.": 11, dec: 12, "dec.": 12 });
exports.INTEGER_WORD_DICTIONARY = {
one: 1,
two: 2,
three: 3,
four: 4,
five: 5,
six: 6,
seven: 7,
eight: 8,
nine: 9,
ten: 10,
eleven: 11,
twelve: 12,
};
exports.ORDINAL_WORD_DICTIONARY = {
first: 1,
second: 2,
third: 3,
fourth: 4,
fifth: 5,
sixth: 6,
seventh: 7,
eighth: 8,
ninth: 9,
tenth: 10,
eleventh: 11,
twelfth: 12,
thirteenth: 13,
fourteenth: 14,
fifteenth: 15,
sixteenth: 16,
seventeenth: 17,
eighteenth: 18,
nineteenth: 19,
twentieth: 20,
"twenty first": 21,
"twenty-first": 21,
"twenty second": 22,
"twenty-second": 22,
"twenty third": 23,
"twenty-third": 23,
"twenty fourth": 24,
"twenty-fourth": 24,
"twenty fifth": 25,
"twenty-fifth": 25,
"twenty sixth": 26,
"twenty-sixth": 26,
"twenty seventh": 27,
"twenty-seventh": 27,
"twenty eighth": 28,
"twenty-eighth": 28,
"twenty ninth": 29,
"twenty-ninth": 29,
"thirtieth": 30,
"thirty first": 31,
"thirty-first": 31,
};
exports.TIME_UNIT_DICTIONARY_NO_ABBR = {
second: "second",
seconds: "second",
minute: "minute",
minutes: "minute",
hour: "hour",
hours: "hour",
day: "d",
days: "d",
week: "week",
weeks: "week",
month: "month",
months: "month",
quarter: "quarter",
quarters: "quarter",
year: "year",
years: "year",
};
exports.TIME_UNIT_DICTIONARY = Object.assign({ s: "second", sec: "second", second: "second", seconds: "second", m: "minute", min: "minute", mins: "minute", minute: "minute", minutes: "minute", h: "hour", hr: "hour", hrs: "hour", hour: "hour", hours: "hour", d: "d", day: "d", days: "d", w: "w", week: "week", weeks: "week", mo: "month", mon: "month", mos: "month", month: "month", months: "month", qtr: "quarter", quarter: "quarter", quarters: "quarter", y: "year", yr: "year", year: "year", years: "year" }, exports.TIME_UNIT_DICTIONARY_NO_ABBR);
exports.NUMBER_PATTERN = `(?:${pattern_1.matchAnyPattern(exports.INTEGER_WORD_DICTIONARY)}|[0-9]+|[0-9]+\\.[0-9]+|half(?:\\s{0,2}an?)?|an?\\b(?:\\s{0,2}few)?|few|several|the|a?\\s{0,2}couple\\s{0,2}(?:of)?)`;
function parseNumberPattern(match) {
const num = match.toLowerCase();
if (exports.INTEGER_WORD_DICTIONARY[num] !== undefined) {
return exports.INTEGER_WORD_DICTIONARY[num];
}
else if (num === "a" || num === "an" || num == "the") {
return 1;
}
else if (num.match(/few/)) {
return 3;
}
else if (num.match(/half/)) {
return 0.5;
}
else if (num.match(/couple/)) {
return 2;
}
else if (num.match(/several/)) {
return 7;
}
return parseFloat(num);
}
exports.parseNumberPattern = parseNumberPattern;
exports.ORDINAL_NUMBER_PATTERN = `(?:${pattern_1.matchAnyPattern(exports.ORDINAL_WORD_DICTIONARY)}|[0-9]{1,2}(?:st|nd|rd|th)?)`;
function parseOrdinalNumberPattern(match) {
let num = match.toLowerCase();
if (exports.ORDINAL_WORD_DICTIONARY[num] !== undefined) {
return exports.ORDINAL_WORD_DICTIONARY[num];
}
num = num.replace(/(?:st|nd|rd|th)$/i, "");
return parseInt(num);
}
exports.parseOrdinalNumberPattern = parseOrdinalNumberPattern;
exports.YEAR_PATTERN = `(?:[1-9][0-9]{0,3}\\s{0,2}(?:BE|AD|BC|BCE|CE)|[1-2][0-9]{3}|[5-9][0-9]|2[0-5])`;
function parseYear(match) {
if (/BE/i.test(match)) {
match = match.replace(/BE/i, "");
return parseInt(match) - 543;
}
if (/BCE?/i.test(match)) {
match = match.replace(/BCE?/i, "");
return -parseInt(match);
}
if (/(AD|CE)/i.test(match)) {
match = match.replace(/(AD|CE)/i, "");
return parseInt(match);
}
const rawYearNumber = parseInt(match);
return years_1.findMostLikelyADYear(rawYearNumber);
}
exports.parseYear = parseYear;
const SINGLE_TIME_UNIT_PATTERN = `(${exports.NUMBER_PATTERN})\\s{0,3}(${pattern_1.matchAnyPattern(exports.TIME_UNIT_DICTIONARY)})`;
const SINGLE_TIME_UNIT_REGEX = new RegExp(SINGLE_TIME_UNIT_PATTERN, "i");
const SINGLE_TIME_UNIT_NO_ABBR_PATTERN = `(${exports.NUMBER_PATTERN})\\s{0,3}(${pattern_1.matchAnyPattern(exports.TIME_UNIT_DICTIONARY_NO_ABBR)})`;
const TIME_UNIT_CONNECTOR_PATTERN = `\\s{0,5},?(?:\\s*and)?\\s{0,5}`;
exports.TIME_UNITS_PATTERN = pattern_1.repeatedTimeunitPattern(`(?:(?:about|around)\\s{0,3})?`, SINGLE_TIME_UNIT_PATTERN, TIME_UNIT_CONNECTOR_PATTERN);
exports.TIME_UNITS_NO_ABBR_PATTERN = pattern_1.repeatedTimeunitPattern(`(?:(?:about|around)\\s{0,3})?`, SINGLE_TIME_UNIT_NO_ABBR_PATTERN, TIME_UNIT_CONNECTOR_PATTERN);
function parseTimeUnits(timeunitText) {
const fragments = {};
let remainingText = timeunitText;
let match = SINGLE_TIME_UNIT_REGEX.exec(remainingText);
while (match) {
collectDateTimeFragment(fragments, match);
remainingText = remainingText.substring(match[0].length).trim();
match = SINGLE_TIME_UNIT_REGEX.exec(remainingText);
}
if (Object.keys(fragments).length == 0) {
return null;
}
return fragments;
}
exports.parseTimeUnits = parseTimeUnits;
function collectDateTimeFragment(fragments, match) {
if (match[0].match(/^[a-zA-Z]+$/)) {
return;
}
const num = parseNumberPattern(match[1]);
const unit = exports.TIME_UNIT_DICTIONARY[match[2].toLowerCase()];
fragments[unit] = num;
}
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