resolve-accept-language/lib/esm/index.js

Resolve the preferred locale based on the value of an `Accept-Language` HTTP header.

var __read=this&&this.__read||function(e,r){var a="function"==typeof Symbol&&e[Symbol.iterator];if(!a)return e;var t,n,o=a.call(e),l=[];try{for(;(void 0===r||r-- >0)&&!(t=o.next()).done;)l.push(t.value)}catch(e){n={error:e}}finally{try{t&&!t.done&&(a=o.return)&&a.call(o)}finally{if(n)throw n.error}}return l},__spreadArray=this&&this.__spreadArray||function(e,r,a){if(a||2===arguments.length)for(var t,n=0,o=r.length;n<o;n++)!t&&n in r||(t||(t=Array.prototype.slice.call(r,0,n)),t[n]=r[n]);return e.concat(t||Array.prototype.slice.call(r))},__values=this&&this.__values||function(e){var r="function"==typeof Symbol&&Symbol.iterator,a=r&&e[r],t=0;if(a)return a.call(e);if(e&&"number"==typeof e.length)return{next:function(){return e&&t>=e.length&&(e=void 0),{value:e&&e[t++],done:!e}}};throw new TypeError(r?"Object is not iterable.":"Symbol.iterator is not defined.")};import{getDirectives}from"./directives.js";import{Locale,LocaleList,isLocale}from"./locales.js";export var MATCH_TYPES={locale:"locale",languageSpecificLocale:"languageSpecificLocale",language:"language",relatedLocale:"relatedLocale",languageCountry:"languageCountry",country:"country",defaultLocale:"defaultLocale"};export var resolveAcceptLanguage=function(e,r,a,t){if(r.forEach((function(e){if(!isLocale(e,!1))throw new Error("Invalid locale identifier '".concat(e,"'. A valid locale should follow the BCP 47 'language-country' format."))})),!isLocale(a,!1))throw new Error("Invalid default locale identifier '".concat(a,"'. A valid locale should follow the BCP 47 'language-country' format."));if(!r.some((function(e){return e.toLowerCase()===a.toLowerCase()})))throw new Error("The default locale '".concat(a,"' must be included in the locales array because it is used as a fallback when no match is found."));var n=new Locale(a),o=new Set(__spreadArray([n.identifier],__read(r.map((function(e){return new Locale(e).identifier}))),!1)),l=function(){var r,a,l,i,c,u,f,d,y=new LocaleList(o),v=getDirectives(e),h=v.filter((function(e){return y.languages.has(e.languageCode)})),s=function(e){var r=e.locale,a=e.languageCode;if(void 0!==r)return y.locales.has(r)?{value:{match:r,matchType:MATCH_TYPES.locale}}:"continue";var t=v.find((function(e){return e.languageCode===a&&void 0!==e.locale&&y.locales.has(e.locale)}));if(t)return{value:{match:t.locale,matchType:MATCH_TYPES.languageSpecificLocale}};var n=y.objects.find((function(e){return e.languageCode===a}));return n?{value:{match:n.identifier,matchType:MATCH_TYPES.language}}:void 0};try{for(var g=__values(h),m=g.next();!m.done;m=g.next()){var p=s(j=m.value);if("object"==typeof p)return p.value}}catch(e){r={error:e}}finally{try{m&&!m.done&&(a=g.return)&&a.call(g)}finally{if(r)throw r.error}}var _=function(e){var r=y.objects.find((function(r){return r.languageCode===e.languageCode}));if(r)return{value:{match:r.identifier,matchType:MATCH_TYPES.relatedLocale}}};try{for(var C=__values(h),T=C.next();!T.done;T=C.next()){var w=_(j=T.value);if("object"==typeof w)return w.value}}catch(e){l={error:e}}finally{try{T&&!T.done&&(i=C.return)&&i.call(C)}finally{if(l)throw l.error}}var L=y.objects.filter((function(e){return e.languageCode===n.languageCode&&e.identifier!==n.identifier})).map((function(e){return e.countryCode}));if(L.length>0)try{for(var b=__values(v),S=b.next();!S.done;S=b.next()){if(void 0!==(j=S.value).locale&&void 0!==j.countryCode&&L.includes(j.countryCode))return{match:"".concat(n.languageCode,"-").concat(j.countryCode),matchType:MATCH_TYPES.languageCountry}}}catch(e){c={error:e}}finally{try{S&&!S.done&&(u=b.return)&&u.call(b)}finally{if(c)throw c.error}}if(null==t?void 0:t.matchCountry){var A=function(e){var r=y.objects.find((function(r){return r.countryCode===e.countryCode}));if(r)return{value:{match:r.identifier,matchType:MATCH_TYPES.country}}};try{for(var E=__values(v),x=E.next();!x.done;x=E.next()){var j,P=A(j=x.value);if("object"==typeof P)return P.value}}catch(e){f={error:e}}finally{try{x&&!x.done&&(d=E.return)&&d.call(E)}finally{if(f)throw f.error}}}return{match:n.identifier,matchType:MATCH_TYPES.defaultLocale}}();return(null==t?void 0:t.returnMatchType)?l:l.match};