@heinlein-video/rrule
Version:
rrule fork. Includes the src/ folder for typescript sourceMaps
388 lines • 12.5 kB
JavaScript
import ENGLISH from './i18n';
import { RRule } from '../rrule';
// =============================================================================
// Parser
// =============================================================================
var Parser = /** @class */ (function () {
function Parser(rules) {
this.done = true;
this.rules = rules;
}
Parser.prototype.start = function (text) {
this.text = text;
this.done = false;
return this.nextSymbol();
};
Parser.prototype.isDone = function () {
return this.done && this.symbol === null;
};
Parser.prototype.nextSymbol = function () {
var best;
var bestSymbol;
this.symbol = null;
this.value = null;
do {
if (this.done)
return false;
var rule = void 0;
best = null;
for (var name_1 in this.rules) {
rule = this.rules[name_1];
var match = rule.exec(this.text);
if (match) {
if (best === null || match[0].length > best[0].length) {
best = match;
bestSymbol = name_1;
}
}
}
if (best != null) {
this.text = this.text.substr(best[0].length);
if (this.text === '')
this.done = true;
}
if (best == null) {
this.done = true;
this.symbol = null;
this.value = null;
return;
}
} while (bestSymbol === 'SKIP');
this.symbol = bestSymbol;
this.value = best;
return true;
};
Parser.prototype.accept = function (name) {
if (this.symbol === name) {
if (this.value) {
var v = this.value;
this.nextSymbol();
return v;
}
this.nextSymbol();
return true;
}
return false;
};
Parser.prototype.acceptNumber = function () {
return this.accept('number');
};
Parser.prototype.expect = function (name) {
if (this.accept(name))
return true;
throw new Error('expected ' + name + ' but found ' + this.symbol);
};
return Parser;
}());
export default function parseText(text, language) {
if (language === void 0) { language = ENGLISH; }
var options = {};
var ttr = new Parser(language.tokens);
if (!ttr.start(text))
return null;
S();
return options;
function S() {
// every [n]
ttr.expect('every');
var n = ttr.acceptNumber();
if (n)
options.interval = parseInt(n[0], 10);
if (ttr.isDone())
throw new Error('Unexpected end');
switch (ttr.symbol) {
case 'day(s)':
options.freq = RRule.DAILY;
if (ttr.nextSymbol()) {
AT();
F();
}
break;
// FIXME Note: every 2 weekdays != every two weeks on weekdays.
// DAILY on weekdays is not a valid rule
case 'weekday(s)':
options.freq = RRule.WEEKLY;
options.byweekday = [RRule.MO, RRule.TU, RRule.WE, RRule.TH, RRule.FR];
ttr.nextSymbol();
F();
break;
case 'week(s)':
options.freq = RRule.WEEKLY;
if (ttr.nextSymbol()) {
ON();
F();
}
break;
case 'hour(s)':
options.freq = RRule.HOURLY;
if (ttr.nextSymbol()) {
ON();
F();
}
break;
case 'minute(s)':
options.freq = RRule.MINUTELY;
if (ttr.nextSymbol()) {
ON();
F();
}
break;
case 'month(s)':
options.freq = RRule.MONTHLY;
if (ttr.nextSymbol()) {
ON();
F();
}
break;
case 'year(s)':
options.freq = RRule.YEARLY;
if (ttr.nextSymbol()) {
ON();
F();
}
break;
case 'monday':
case 'tuesday':
case 'wednesday':
case 'thursday':
case 'friday':
case 'saturday':
case 'sunday':
options.freq = RRule.WEEKLY;
var key = ttr.symbol
.substr(0, 2)
.toUpperCase();
options.byweekday = [RRule[key]];
if (!ttr.nextSymbol())
return;
// TODO check for duplicates
while (ttr.accept('comma')) {
if (ttr.isDone())
throw new Error('Unexpected end');
var wkd = decodeWKD();
if (!wkd) {
throw new Error('Unexpected symbol ' + ttr.symbol + ', expected weekday');
}
options.byweekday.push(RRule[wkd]);
ttr.nextSymbol();
}
MDAYs();
F();
break;
case 'january':
case 'february':
case 'march':
case 'april':
case 'may':
case 'june':
case 'july':
case 'august':
case 'september':
case 'october':
case 'november':
case 'december':
options.freq = RRule.YEARLY;
options.bymonth = [decodeM()];
if (!ttr.nextSymbol())
return;
// TODO check for duplicates
while (ttr.accept('comma')) {
if (ttr.isDone())
throw new Error('Unexpected end');
var m = decodeM();
if (!m) {
throw new Error('Unexpected symbol ' + ttr.symbol + ', expected month');
}
options.bymonth.push(m);
ttr.nextSymbol();
}
ON();
F();
break;
default:
throw new Error('Unknown symbol');
}
}
function ON() {
var on = ttr.accept('on');
var the = ttr.accept('the');
if (!(on || the))
return;
do {
var nth = decodeNTH();
var wkd = decodeWKD();
var m = decodeM();
// nth <weekday> | <weekday>
if (nth) {
// ttr.nextSymbol()
if (wkd) {
ttr.nextSymbol();
if (!options.byweekday)
options.byweekday = [];
options.byweekday.push(RRule[wkd].nth(nth));
}
else {
if (!options.bymonthday)
options.bymonthday = [];
options.bymonthday.push(nth);
ttr.accept('day(s)');
}
// <weekday>
}
else if (wkd) {
ttr.nextSymbol();
if (!options.byweekday)
options.byweekday = [];
options.byweekday.push(RRule[wkd]);
}
else if (ttr.symbol === 'weekday(s)') {
ttr.nextSymbol();
if (!options.byweekday) {
options.byweekday = [RRule.MO, RRule.TU, RRule.WE, RRule.TH, RRule.FR];
}
}
else if (ttr.symbol === 'week(s)') {
ttr.nextSymbol();
var n = ttr.acceptNumber();
if (!n) {
throw new Error('Unexpected symbol ' + ttr.symbol + ', expected week number');
}
options.byweekno = [parseInt(n[0], 10)];
while (ttr.accept('comma')) {
n = ttr.acceptNumber();
if (!n) {
throw new Error('Unexpected symbol ' + ttr.symbol + '; expected monthday');
}
options.byweekno.push(parseInt(n[0], 10));
}
}
else if (m) {
ttr.nextSymbol();
if (!options.bymonth)
options.bymonth = [];
options.bymonth.push(m);
}
else {
return;
}
} while (ttr.accept('comma') || ttr.accept('the') || ttr.accept('on'));
}
function AT() {
var at = ttr.accept('at');
if (!at)
return;
do {
var n = ttr.acceptNumber();
if (!n) {
throw new Error('Unexpected symbol ' + ttr.symbol + ', expected hour');
}
options.byhour = [parseInt(n[0], 10)];
while (ttr.accept('comma')) {
n = ttr.acceptNumber();
if (!n) {
throw new Error('Unexpected symbol ' + ttr.symbol + '; expected hour');
}
options.byhour.push(parseInt(n[0], 10));
}
} while (ttr.accept('comma') || ttr.accept('at'));
}
function decodeM() {
switch (ttr.symbol) {
case 'january':
return 1;
case 'february':
return 2;
case 'march':
return 3;
case 'april':
return 4;
case 'may':
return 5;
case 'june':
return 6;
case 'july':
return 7;
case 'august':
return 8;
case 'september':
return 9;
case 'october':
return 10;
case 'november':
return 11;
case 'december':
return 12;
default:
return false;
}
}
function decodeWKD() {
switch (ttr.symbol) {
case 'monday':
case 'tuesday':
case 'wednesday':
case 'thursday':
case 'friday':
case 'saturday':
case 'sunday':
return ttr.symbol.substr(0, 2).toUpperCase();
default:
return false;
}
}
function decodeNTH() {
switch (ttr.symbol) {
case 'last':
ttr.nextSymbol();
return -1;
case 'first':
ttr.nextSymbol();
return 1;
case 'second':
ttr.nextSymbol();
return ttr.accept('last') ? -2 : 2;
case 'third':
ttr.nextSymbol();
return ttr.accept('last') ? -3 : 3;
case 'nth':
var v = parseInt(ttr.value[1], 10);
if (v < -366 || v > 366)
throw new Error('Nth out of range: ' + v);
ttr.nextSymbol();
return ttr.accept('last') ? -v : v;
default:
return false;
}
}
function MDAYs() {
ttr.accept('on');
ttr.accept('the');
var nth = decodeNTH();
if (!nth)
return;
options.bymonthday = [nth];
ttr.nextSymbol();
while (ttr.accept('comma')) {
nth = decodeNTH();
if (!nth) {
throw new Error('Unexpected symbol ' + ttr.symbol + '; expected monthday');
}
options.bymonthday.push(nth);
ttr.nextSymbol();
}
}
function F() {
if (ttr.symbol === 'until') {
var date = Date.parse(ttr.text);
if (!date)
throw new Error('Cannot parse until date:' + ttr.text);
options.until = new Date(date);
}
else if (ttr.accept('for')) {
options.count = parseInt(ttr.value[0], 10);
ttr.expect('number');
// ttr.expect('times')
}
}
}
//# sourceMappingURL=parsetext.js.map