intl-messageformat-parser
Version:
Parses ICU Message strings into an AST via JavaScript.
97 lines (96 loc) • 3.24 kB
JavaScript
/*
* Copyright 2015, Yahoo Inc.
* Copyrights licensed under the New BSD License.
* See the accompanying LICENSE file for terms.
*/
import { __spreadArray } from "tslib";
import { isLiteralElement, isTagElement, isSelectElement, isArgumentElement, isDateElement, isTimeElement, isNumberElement, isPluralElement, TYPE, SKELETON_TYPE, isPoundElement, } from './types';
export function printAST(ast) {
return doPrintAST(ast, false);
}
export function doPrintAST(ast, isInPlural) {
var printedNodes = ast.map(function (el) {
if (isLiteralElement(el)) {
return printLiteralElement(el, isInPlural);
}
if (isArgumentElement(el)) {
return printArgumentElement(el);
}
if (isDateElement(el) || isTimeElement(el) || isNumberElement(el)) {
return printSimpleFormatElement(el);
}
if (isPluralElement(el)) {
return printPluralElement(el);
}
if (isSelectElement(el)) {
return printSelectElement(el);
}
if (isPoundElement(el)) {
return '#';
}
if (isTagElement(el)) {
return printTagElement(el);
}
});
return printedNodes.join('');
}
function printTagElement(el) {
return "<" + el.value + ">" + printAST(el.children) + "</" + el.value + ">";
}
function printEscapedMessage(message) {
return message.replace(/([{}](?:.*[{}])?)/su, "'$1'");
}
function printLiteralElement(_a, isInPlural) {
var value = _a.value;
var escaped = printEscapedMessage(value);
return isInPlural ? escaped.replace('#', "'#'") : escaped;
}
function printArgumentElement(_a) {
var value = _a.value;
return "{" + value + "}";
}
function printSimpleFormatElement(el) {
return "{" + el.value + ", " + TYPE[el.type] + (el.style ? ", " + printArgumentStyle(el.style) : '') + "}";
}
function printNumberSkeletonToken(token) {
var stem = token.stem, options = token.options;
return options.length === 0
? stem
: "" + stem + options.map(function (o) { return "/" + o; }).join('');
}
function printArgumentStyle(style) {
if (typeof style === 'string') {
return printEscapedMessage(style);
}
else if (style.type === SKELETON_TYPE.dateTime) {
return "::" + printDateTimeSkeleton(style);
}
else {
return "::" + style.tokens.map(printNumberSkeletonToken).join(' ');
}
}
export function printDateTimeSkeleton(style) {
return style.pattern;
}
function printSelectElement(el) {
var msg = [
el.value,
'select',
Object.keys(el.options)
.map(function (id) { return id + "{" + doPrintAST(el.options[id].value, false) + "}"; })
.join(' '),
].join(',');
return "{" + msg + "}";
}
function printPluralElement(el) {
var type = el.pluralType === 'cardinal' ? 'plural' : 'selectordinal';
var msg = [
el.value,
type,
__spreadArray([
el.offset ? "offset:" + el.offset : ''
], Object.keys(el.options).map(function (id) { return id + "{" + doPrintAST(el.options[id].value, true) + "}"; })).filter(Boolean)
.join(' '),
].join(',');
return "{" + msg + "}";
}