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import config from '@automattic/calypso-config';
import { localizeUrl, getLanguageSlugs } from '@automattic/i18n-utils';
import performanceMark from 'calypso/server/lib/performance-mark';
import { isUserLoggedIn } from 'calypso/state/current-user/selectors';
import { setDocumentHeadLink } from 'calypso/state/document-head/actions';
const getLocalizedCanonicalUrl = ( path, locale, excludeSearch = false ) => {
const baseUrl = new URL( path, 'https://wordpress.com' );
if ( excludeSearch ) {
baseUrl.search = '';
}
const baseUrlWithoutLang = baseUrl.href.replace(
new RegExp( `\\/(${ getLanguageSlugs().join( '|' ) })(\\/|\\?|$)` ),
'$2'
);
let localizedUrl = localizeUrl( baseUrlWithoutLang, locale, false );
// Remove the trailing slash if `path` doesn't have one either.
if ( ! path.endsWith( '/' ) && localizedUrl.endsWith( '/' ) ) {
localizedUrl = localizedUrl.slice( 0, -1 );
}
return localizedUrl;
};
export const excludeSearchFromCanonicalUrlAndHrefLangLinks = ( context, next ) => {
context.excludeSearchFromCanonicalUrl = true;
next();
};
export const setLocalizedCanonicalUrl = ( context, next ) => {
performanceMark( context, 'setLocalizedCanonicalUrl' );
if ( ! context.isServerSide || isUserLoggedIn( context.store.getState() ) ) {
next();
return;
}
const canonicalUrl = getLocalizedCanonicalUrl(
context.originalUrl,
context.i18n.getLocaleSlug(),
context.excludeSearchFromCanonicalUrl
);
context.store.dispatch(
setDocumentHeadLink( {
rel: 'canonical',
href: canonicalUrl,
} )
);
next();
};
export const setHrefLangLinks = ( context, next ) => {
if ( ! context.isServerSide || isUserLoggedIn( context.store.getState() ) ) {
next();
return;
}
performanceMark( context, 'setHrefLangLinks' );
const langCodes = [ 'x-default', 'en', ...config( 'magnificent_non_en_locales' ) ];
const hrefLangBlock = langCodes.map( ( hrefLang ) => {
let localeSlug = hrefLang;
if ( localeSlug === 'x-default' ) {
localeSlug = config( 'i18n_default_locale_slug' );
}
const href = getLocalizedCanonicalUrl(
context.originalUrl,
localeSlug,
context.excludeSearchFromCanonicalUrl
);
return {
rel: 'alternate',
hrefLang,
href,
};
} );
context.store.dispatch( setDocumentHeadLink( hrefLangBlock ) );
next();
};
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