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/** @import {I18nDefinitionMap, Translations, I18nDefinition, NormalizedI18nDefinition, NormalizedI18nDefinitionMap} from '../i18n-normalizer/i18n-normalizer.js' */
/**
* Reducer for {@link merge} function, works on data prepared in {@link mergeReducer}
* @param {I18nMergeIntermediaryResult} acc - accumulator
* @param {NormalizedI18nDefinition} i18nDefinition - i18n definition
* @param {string} language - i18n definition locale
* @param {string | URL} locationBase - i18n definition url location
* @returns {I18nMergeIntermediaryResult} updated accumulator
*/
function mergeLang (acc, i18nDefinition, language, locationBase) {
const { translations, import: ext } = i18nDefinition
const strLang = language.toString()
const definition = acc[strLang] || { import: new Set(), translations: {} }
const definitionExtSet = definition.import
ext.forEach((e) => {
const importLocation = new URL(e, locationBase).href
definitionExtSet.add(importLocation)
})
definition.translations = {
...definition.translations,
...translations,
}
acc[strLang] = definition
return acc
}
/**
* Reducer for {@link merge} function, prepares i18n merge before applying {@link mergeLang}
* @param {I18nMergeIntermediaryResult} acc - accumulator
* @param {I18nLangMergeData} mergeData - merge data
* @returns {I18nMergeIntermediaryResult} updated accumulator
*/
function mergeReducer (acc, mergeData) {
const { location, kind } = mergeData
const locationStr = typeof location === 'string' ? location : location.href
if (kind === 'definition') {
const i18nDefinition = normalizeI18nDefinition(mergeData.data).result
return mergeLang(acc, i18nDefinition, mergeData.language.toString(), location)
}
if (kind === 'translations') {
const i18nDefinition = normalizeI18nDefinition(locationStr).result
return mergeLang(acc, i18nDefinition, mergeData.language.toString(), location)
}
const i18nDefinitionMap = normalizeI18nDefinitionMap(mergeData.data).result
return Object.entries(i18nDefinitionMap).reduce(
(acc, [lang, def]) => mergeLang(acc, def, lang, location),
acc)
}
/**
* @param {...I18nLangMergeData} data - data to merge
* @returns {NormalizedI18nDefinitionMap} merged data
*/
function merge (...data) {
const result = data.reduce(mergeReducer, {})
return Object.fromEntries(
Object.entries(result).map(([lang, { import: ext, translations }]) => [
lang,
{
import: [...ext],
translations,
},
])
)
}
/**
* {@link merge} call thunk
* @param {I18nLangMergeData[]} data - {@link merge} input
* @returns {() => NormalizedI18nDefinitionMap} thunk that calls merge with `data` and memoizes it
*/
const mergeThunk = (data) => {
let buildResult = () => {
const result = merge(...data)
buildResult = () => result
return result
}
return () => buildResult()
}
/**
* @param {I18nLangMergeData[]} data - current data to merge
* @returns {Readonly<MergerInstance>} immutable merger instance
*/
const mergeInstance = (data) => Object.freeze({
addMap: (i18nInfo, location) => mergeInstance([...data, { kind: 'map', data: i18nInfo, location }]),
addDefinitionOnLanguage: (i18nDef, language, location) => mergeInstance([...data, { kind: 'definition', language, data: i18nDef, location }]),
addTranslations: (location, language) => mergeInstance([...data, { kind: 'translations', language, location }]),
build: mergeThunk(data),
})
export const builder = mergeInstance([])
/** @typedef {{[language: string]: {"import": Set<string>,translations: Translations}}} I18nMergeIntermediaryResult */
/** @typedef {I18nMapMergeData | I18nDefinitionMergeData | I18nTranslationMergeData } I18nLangMergeData */
/**
* @typedef {object} I18nMapMergeData
* I18n definition map merge data
* @property {'map'} kind - merge data type
* @property {I18nDefinitionMap} data - i18n definition map data
* @property {URL | string} location - i18n definition map location
*/
/**
* @typedef {object} I18nDefinitionMergeData
* @property {'definition'} kind - merge data type
* @property {I18nDefinition} data - i18n definition data
* @property {URL | string} location - i18n definition location
* @property {Intl.Locale | string} language - i18n definition locale
*/
/**
* @typedef {object} I18nTranslationMergeData
* @property {'translations'} kind - merge data type
* @property {URL | string} location - translations map location
* @property {Intl.Locale | string} language - translations map locale
*/
/**
* @typedef {object} MergerInstance
* Contains api to add data to merge or merge with the current data
* @property {(i18nInfo: I18nDefinitionMap, location: URL | string) => MergerInstance} addMap - add map of locale to i18n definition to merge
* @property {(i18nDef: I18nDefinition, language: Intl.Locale | string, location: URL | string) => MergerInstance} addDefinitionOnLanguage - add i18n definition map in a specific locale to merge
* @property {(location: URL | string, language: Intl.Locale | string) => MergerInstance} addTranslations - add url location of a translation map in a specific locale to merge
* @property {() => NormalizedI18nDefinitionMap} build - merge current data
*/
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