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

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

"use strict";var __read=this&&this.__read||function(e,r){var a="function"==typeof Symbol&&e[Symbol.iterator];if(!a)return e;var t,o,n=a.call(e),l=[];try{for(;(void 0===r||r-- >0)&&!(t=n.next()).done;)l.push(t.value)}catch(e){o={error:e}}finally{try{t&&!t.done&&(a=n.return)&&a.call(n)}finally{if(o)throw o.error}}return l},__spreadArray=this&&this.__spreadArray||function(e,r,a){if(a||2===arguments.length)for(var t,o=0,n=r.length;o<n;o++)!t&&o in r||(t||(t=Array.prototype.slice.call(r,0,o)),t[o]=r[o]);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.")};Object.defineProperty(exports,"__esModule",{value:!0}),exports.resolveAcceptLanguage=exports.MATCH_TYPES=void 0;var directives_1=require("./directives"),locales_1=require("./locales");exports.MATCH_TYPES={locale:"locale",languageSpecificLocale:"languageSpecificLocale",language:"language",relatedLocale:"relatedLocale",languageCountry:"languageCountry",country:"country",defaultLocale:"defaultLocale"};var resolveAcceptLanguage=function(e,r,a,t){if(r.forEach((function(e){if(!(0,locales_1.isLocale)(e,!1))throw new Error("Invalid locale identifier '".concat(e,"'. A valid locale should follow the BCP 47 'language-country' format."))})),!(0,locales_1.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 o=new locales_1.Locale(a),n=new Set(__spreadArray([o.identifier],__read(r.map((function(e){return new locales_1.Locale(e).identifier}))),!1)),l=function(){var r,a,l,c,i,u,f,d,s=new locales_1.LocaleList(n),v=(0,directives_1.getDirectives)(e),y=v.filter((function(e){return s.languages.has(e.languageCode)})),g=function(e){var r=e.locale,a=e.languageCode;if(void 0!==r)return s.locales.has(r)?{value:{match:r,matchType:exports.MATCH_TYPES.locale}}:"continue";var t=v.find((function(e){return e.languageCode===a&&void 0!==e.locale&&s.locales.has(e.locale)}));if(t)return{value:{match:t.locale,matchType:exports.MATCH_TYPES.languageSpecificLocale}};var o=s.objects.find((function(e){return e.languageCode===a}));return o?{value:{match:o.identifier,matchType:exports.MATCH_TYPES.language}}:void 0};try{for(var h=__values(y),p=h.next();!p.done;p=h.next()){var _=g(P=p.value);if("object"==typeof _)return _.value}}catch(e){r={error:e}}finally{try{p&&!p.done&&(a=h.return)&&a.call(h)}finally{if(r)throw r.error}}var C=function(e){var r=s.objects.find((function(r){return r.languageCode===e.languageCode}));if(r)return{value:{match:r.identifier,matchType:exports.MATCH_TYPES.relatedLocale}}};try{for(var m=__values(y),T=m.next();!T.done;T=m.next()){var w=C(P=T.value);if("object"==typeof w)return w.value}}catch(e){l={error:e}}finally{try{T&&!T.done&&(c=m.return)&&c.call(m)}finally{if(l)throw l.error}}var x=s.objects.filter((function(e){return e.languageCode===o.languageCode&&e.identifier!==o.identifier})).map((function(e){return e.countryCode}));if(x.length>0)try{for(var L=__values(v),A=L.next();!A.done;A=L.next()){if(void 0!==(P=A.value).locale&&void 0!==P.countryCode&&x.includes(P.countryCode))return{match:"".concat(o.languageCode,"-").concat(P.countryCode),matchType:exports.MATCH_TYPES.languageCountry}}}catch(e){i={error:e}}finally{try{A&&!A.done&&(u=L.return)&&u.call(L)}finally{if(i)throw i.error}}if(null==t?void 0:t.matchCountry){var b=function(e){var r=s.objects.find((function(r){return r.countryCode===e.countryCode}));if(r)return{value:{match:r.identifier,matchType:exports.MATCH_TYPES.country}}};try{for(var S=__values(v),E=S.next();!E.done;E=S.next()){var P,M=b(P=E.value);if("object"==typeof M)return M.value}}catch(e){f={error:e}}finally{try{E&&!E.done&&(d=S.return)&&d.call(S)}finally{if(f)throw f.error}}}return{match:o.identifier,matchType:exports.MATCH_TYPES.defaultLocale}}();return(null==t?void 0:t.returnMatchType)?l:l.match};exports.resolveAcceptLanguage=resolveAcceptLanguage;