@spartacus/core
Version:
Spartacus - the core framework
81 lines • 11.8 kB
JavaScript
import { Inject, Injectable, isDevMode } from '@angular/core';
import { Observable } from 'rxjs';
import { I18NEXT_INSTANCE } from './i18next-instance';
import * as i0 from "@angular/core";
import * as i1 from "../config/i18n-config";
import * as i2 from "../translation-chunk.service";
export class I18nextTranslationService {
constructor(config, translationChunk,
// Required param added in 3.0.x as a critical bug fix, not subject to the breaking changes policy
i18next) {
this.config = config;
this.translationChunk = translationChunk;
this.i18next = i18next;
this.NON_BREAKING_SPACE = String.fromCharCode(160);
this.NAMESPACE_SEPARATOR = ':';
}
translate(key, options = {}, whitespaceUntilLoaded = false) {
// If we've already loaded the chunk (or failed to load), we should immediately emit the value
// (or the fallback value in case the key is missing).
// Moreover, we SHOULD emit a value (or a fallback value) synchronously (not in a promise/setTimeout).
// Otherwise, we the will trigger additional deferred change detection in a view that consumes the returned observable,
// which together with `switchMap` operator may lead to an infinite loop.
const chunkName = this.translationChunk.getChunkNameForKey(key);
const namespacedKey = this.getNamespacedKey(key, chunkName);
return new Observable((subscriber) => {
const translate = () => {
if (!this.i18next.isInitialized) {
return;
}
if (this.i18next.exists(namespacedKey, options)) {
subscriber.next(this.i18next.t(namespacedKey, options));
}
else {
if (whitespaceUntilLoaded) {
subscriber.next(this.NON_BREAKING_SPACE);
}
this.i18next.loadNamespaces(chunkName, () => {
if (!this.i18next.exists(namespacedKey, options)) {
this.reportMissingKey(key, chunkName);
subscriber.next(this.getFallbackValue(namespacedKey));
}
else {
subscriber.next(this.i18next.t(namespacedKey, options));
}
});
}
};
translate();
this.i18next.on('languageChanged', translate);
return () => this.i18next.off('languageChanged', translate);
});
}
loadChunks(chunkNames) {
return this.i18next.loadNamespaces(chunkNames);
}
/**
* Returns a fallback value in case when the given key is missing
* @param key
*/
getFallbackValue(key) {
return isDevMode() ? `[${key}]` : this.NON_BREAKING_SPACE;
}
reportMissingKey(key, chunkName) {
if (isDevMode()) {
console.warn(`Translation key missing '${key}' in the chunk '${chunkName}'`);
}
}
getNamespacedKey(key, chunk) {
return chunk + this.NAMESPACE_SEPARATOR + key;
}
}
I18nextTranslationService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: I18nextTranslationService, deps: [{ token: i1.I18nConfig }, { token: i2.TranslationChunkService }, { token: I18NEXT_INSTANCE }], target: i0.ɵɵFactoryTarget.Injectable });
I18nextTranslationService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: I18nextTranslationService, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: I18nextTranslationService, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: function () { return [{ type: i1.I18nConfig }, { type: i2.TranslationChunkService }, { type: undefined, decorators: [{
type: Inject,
args: [I18NEXT_INSTANCE]
}] }]; } });
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