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import { isUserLoggedIn } from 'calypso/state/current-user/selectors';
import { setSection } from 'calypso/state/ui/actions';
import { setLocale } from 'calypso/state/ui/language/actions';
const noop = () => {};
export function makeLayoutMiddleware( LayoutComponent ) {
return ( context, next ) => {
const {
i18n,
store,
queryClient,
section,
pathname,
query,
primary,
secondary,
renderHeaderSection,
showGdprBanner,
cachedMarkup,
} = context;
// Markup exists in the cache; no need to do extra work which won't be used.
if ( cachedMarkup ) {
return next();
}
// On server, only render LoggedOutLayout when logged-out.
if ( ! ( context.isServerSide && isUserLoggedIn( context.store.getState() ) ) ) {
context.layout = (
<LayoutComponent
i18n={ i18n }
store={ store }
queryClient={ queryClient }
currentSection={ section }
currentRoute={ pathname }
currentQuery={ query }
primary={ primary }
secondary={ secondary }
renderHeaderSection={ renderHeaderSection }
redirectUri={ context.originalUrl }
showGdprBanner={ showGdprBanner }
/>
);
}
next();
};
}
export function setSectionMiddleware( section ) {
return ( context, next = noop ) => {
// save the section in context
context.section = section;
// save the section to Redux, too (poised to become legacy)
context.store.dispatch( setSection( section ) );
next();
};
}
export function setLocaleMiddleware( param = 'lang' ) {
return ( context, next ) => {
const queryLocale = context.query[ param ];
if ( queryLocale ) {
context.lang = queryLocale;
context.store.dispatch( setLocale( queryLocale ) );
}
const paramsLocale = context.params[ param ];
if ( paramsLocale ) {
context.lang = paramsLocale;
context.store.dispatch( setLocale( paramsLocale ) );
}
next();
};
}
/**
* Composes multiple handlers into one.
* @param {Object[]} handlers { ...( context, Function ) => void } - A list of route handlers to compose
* @returns {Function} { ( context, Function ) => void } - A new route handler that executes the handlers in succession
*/
export function composeHandlers( ...handlers ) {
return ( context, next ) => {
const it = handlers.values();
function handleNext() {
const nextHandler = it.next().value;
if ( ! nextHandler ) {
next();
} else {
nextHandler( context, handleNext );
}
}
handleNext();
};
}
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