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/**
* Assume that, you want to assign a person to each language
/
class SamplePerson {
id = null;
name = null;

/**
* @param {any} value
* @returns {SamplePerson}
/
static cast(value) {
const obj = SamplePerson();
obj.id = value?.id || null;
obj.name = value?.name || null;
//validates value is {id: string, name: string}
return obj;
}
/**
* @param {Array} values
* @returns {Array}
/
static castArray(values) {
const list = [];
values.forEach(value => {
list.push(SamplePerson.cast(value));
});
return list;
}
}
export class I18nPerson extends AbstractI18n {
constructor() {
super(SamplePerson.cast);
}
}
export class I18nPersonArray extends AbstractI18n {
constructor() {
super(SamplePerson.castArray);
}
}
const i18nPerson = new I18nPerson();

//DEF_KEY is "__" it will be filled by default language (languageDefault)
//Invalid language will be removed, only languageAvailableList keys will be seved
i18nPerson.cast({en: {id:5}, invalidLang: {id:23, name: 'dummy'}}); //{__: {id:5, name: null}, en: {id:5, name: null}}

//Plain value (not-i18n) will be converted as i18n
i18nPerson.cast(req, {id:7}) //{__: {id:7, name: null}, en: {id:7, name: null}}

//DEF_KEY will be removed
i18nPerson.view(req, {__: {id:7, name: 'Eric'}, en: {id:7, name: 'Eric'}, de: {id:34, name: 'Hans'}}) //{en: {id:7, name: 'Eric'}, de: {id:34, name: 'Hans'}}

//it based on languageDefaultList, ie: if it is ['en', 'de']
i18nPerson.def(req) //{en: {id:null, name: null}, de: {id:null, name: null}}

//it based on languageDefault, ie: if it is 'de'
i18nPerson.mapToPlain(req, {__: {id:7, name: 'Eric'}, en: {id:7, name: 'Eric'}, de: {id:34, name: 'Hans'}}) //{id:34, name: 'Hans'}