koa i18n middleware in bpframework.

$3

https://github.com/bpcloud/middleware

$3

Setup.

``js
import { Application } from 'bpframework';
import * as middleware_i18n from '@bpframework/middleware-koa-i18n';

let cfg = {
dirs: ['resource/locales'],
defaultLocale: 'zh-CN',
functionName: '__i18n',
queryField: 'locale', // querystring - /?locale=en-US
cookieField: 'locale',
localeAlias: {
zh: 'zh-CN',
},
};

Application.use(middleware_i18n.middleware(cfg))
Application.runKoa(...);
`

Use in anywhere.

`js
__i18n('hello {name}', {name:'world'}) // return 'hello world' by default locale
__i18n('hello %s %s', 'name', 'world') // return 'hello name world' by default locale
__i18nLang('en', 'hello {name}', {name:'world'}) // return 'hello world' by 'en' locale
`

Use in controller.

`js
@RequestMapping({
path: '/test',
method: RequestMethod.GET,
})
async test(
@RestObject restObj: RestObjectTypeRest // or RestObjectType
): Promise {

// return 'hello world' by locale
restObj.ctx.__i18n('hello {name}', {name:'world'});

...
}
``