plural-rules/dist/code.mjs.map

Evaluates plural rules, so that localization libraries can choose the right plural form.

{"version":3,"file":"code.mjs","sources":["../src/code.js","../src/data-indexer.js"],"sourcesContent":["import parsePluralRule from 'cldrpluralruleparser'\nimport { indexPluralForms, parsePluralForms } from './data-indexer.js'\n\nlet rules = []\nlet cardinals = {}\n\nfunction normalizeLocale (locale) {\n  return locale.toLowerCase().replace('_', '-')\n}\n\nfunction getLanguage (locale) {\n  const separator = locale.indexOf('-')\n  return separator > 0 && locale.substr(0, separator)\n}\n\nfunction getPluralRulesForCardinals (locale) {\n  locale = normalizeLocale(locale)\n  let forms = cardinals[locale]\n  let language\n  if (forms === undefined) {\n    language = getLanguage(locale)\n    if (language) {\n      forms = cardinals[language]\n    }\n  }\n  if (forms === undefined) {\n    throw new Error(`Unrecognised locale: \"${locale}\".`)\n  } else if (typeof forms === 'string') {\n    forms = parsePluralForms(forms)\n    cardinals[language || locale] = forms\n  }\n  return forms\n}\n\nfunction getPluralFormForCardinal (locale, count) {\n  const forms = typeof locale !== 'string'\n    ? locale\n    : getPluralRulesForCardinals(locale)\n  for (const form in forms) {\n    const rule = forms[form]\n    if (parsePluralRule(rules[rule], count)) {\n      return form\n    }\n  }\n}\n\nfunction setPluralFormsForCardinals (locale, forms) {\n  locale = normalizeLocale(locale)\n  cardinals[locale] = indexPluralForms(forms, rules)\n}\n\nfunction populatePluralData (data) {\n  rules = data.rules\n  cardinals = data.cardinals\n}\n\nlet supportedLocales\n\nfunction getSupportedLocales() {\n  if (!supportedLocales) supportedLocales = Object.keys(cardinals)\n  return supportedLocales\n}\n\nfunction getPluralFormsForLocale(locale) {\n  const cardinal = cardinals[locale]\n  if (cardinal === undefined) return\n  return cardinal\n    .split(',')\n    .map(form => form.substring(0, form.indexOf(':')))\n}\n\nexport {\n  getPluralRulesForCardinals, getPluralFormForCardinal,\n  setPluralFormsForCardinals, populatePluralData,\n  getSupportedLocales, getPluralFormsForLocale\n}\n","// Input string with the object serialized:\n//   \"one:0,other:1\"\n// Output forms, names pointing to array indexes of their rules:\n//   {\n//     \"one\": 0,\n//     \"other\": 1\n//   }\nfunction parsePluralForms (serializedForms) {\n  return serializedForms\n    .split(',')\n    .reduce((result, serializedForm) => {\n      const parts = serializedForm.split(':')\n      result[parts[0]] = +parts[1]\n      return result\n    }, {})\n}\n\n// Input forms with rules:\n//   {\n//     \"pluralRule-count-one\": \"i = 1 and v = 0 @integer 1\",\n//     \"pluralRule-count-other\": \" @integer 0, 2~16, 100, 1000, 10000, 100000, 1000000, …\n//       @decimal 0.0~1.5, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …\"\n//   }\n// Output rules, an array of distinct strings:\n//   [\n//     \"i = 1 and v = 0 @integer 1\",\n//     \" @integer 0, 2~16, 100, 1000, 10000, 100000, 1000000, …\n//        @decimal 0.0~1.5, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …\",\n//     ...\n//   ]\n// Output forms, names pointing to array indexes of their rules:\n//   {\n//     \"one\": 0,\n//     \"other\": 1\n//   }\nfunction indexPluralForms (forms, rules) {\n  // Iterate over all plural forms.\n  return Object\n    .keys(forms)\n    .reduce((result, formName) => {\n      // Refer to plural rules in the de-duplication array.\n      let rule = forms[formName]\n      if (typeof rule === 'string') {\n        rule = rule\n          .trim()\n          .replace(/ {2}/g, ' ')\n        let ruleIndex = rules.indexOf(rule)\n        if (ruleIndex < 0) {\n          ruleIndex = rules.length\n          rules.push(rule)\n        }\n        rule = ruleIndex\n      }\n      // Cut off prefixes \"pluralRule-count- from plural forms.\n      if (formName.length > 17) {\n        formName = formName.substr(17)\n      }\n      result[formName] = rule\n      return result\n    }, {})\n}\n\nexport { indexPluralForms, parsePluralForms 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