mirror of
https://github.com/osmarks/mycorrhiza.git
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106 lines
3.2 KiB
Go
106 lines
3.2 KiB
Go
package l18n
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import (
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"fmt"
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"golang.org/x/text/feature/plural"
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"golang.org/x/text/language"
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"net/http"
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"strings"
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)
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// matcher is a language.Matcher configured for all supported languages.
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var locales = language.NewMatcher([]language.Tag{
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language.Make("en"),
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language.Make("ru"),
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})
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// FromRequest takes a HTTP request and picks the most appropriate localizer (with English fallback)
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func FromRequest(r *http.Request) *Localizer {
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t, _, _ := language.ParseAcceptLanguage(r.Header.Get("Accept-Language"))
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tag, _, _ := locales.Match(t...)
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// TODO: support subtags such as en-US, en-GB, zh-Hans
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base, _ := tag.Base()
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return New(base.String(), "en")
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}
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var formNames = map[plural.Form]string{
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plural.Other: "other",
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plural.Zero: "zero",
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plural.One: "one",
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plural.Two: "two",
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plural.Few: "few",
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plural.Many: "many",
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}
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func (t Localizer) rawPlural(lang, rawKey string, n int) (string, bool) {
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key := t.getLocalizationKey(lang, rawKey)
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str, ok := t.Localizations[key]
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if !ok {
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return key, false
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}
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var (
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formIdx = plural.Cardinal.MatchPlural(language.Make(lang), n, 0, 0, 0, 0)
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form = formNames[formIdx]
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)
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plural, plOk := t.Localizations[fmt.Sprintf("%v+%v", key, form)]
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if !plOk {
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return key, false
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}
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return fmt.Sprintf(str, plural), true
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}
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// GetPlural gets a translated string respecting locale-specific plural rules. Technically, it replaces %s token with +form subkey and proceed as usual.
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func (t Localizer) GetPlural(key string, n int, replacements ...*Replacements) string {
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str, ok := t.rawPlural(t.Locale, key, n)
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if !ok {
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str, ok = t.rawPlural(t.FallbackLocale, key, n)
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if !ok {
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return key
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}
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}
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// As in the original, we skip templating if have nothing to replace (however, it's strange case for plurals)
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if strings.Index(str, "}}") == -1 {
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return str
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}
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return t.replace(str, append(replacements, &Replacements{"n": n})...)
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}
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// GetPlural64 is ditto for int64
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func (t Localizer) GetPlural64(key string, n int64, replacements ...*Replacements) string {
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str, ok := t.rawPlural(t.Locale, key, int(n%1000000))
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if !ok {
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str, ok = t.rawPlural(t.FallbackLocale, key, int(n%1000000))
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if !ok {
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return key
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}
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}
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// As in the original, we skip templating if have nothing to replace (however, it's strange case for plurals)
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if strings.Index(str, "}}") == -1 {
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return str
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}
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return t.replace(str, append(replacements, &Replacements{"n": n})...)
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}
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func getLocalizationKey(locale string, key string) string {
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return fmt.Sprintf("%v.%v", locale, key)
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}
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/* chekoopa: Missing translation features:
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- history records (they use Git description, the possible solution is to parse and translate)
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- history dates (history.WithRevisions doesn't consider locale, Monday package is bad idea)
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- probably error messages (which are scattered across the code)
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- default top bar (it is static from one-shot cfg.SetDefaultHeaderLinks, but it is possible to track default-ness in templates)
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- alt solution is implementing "special" links
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- dynamic UI (JS are static, though we may send some strings through templates)
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- help switches, like,
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- "Read in your language"
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- "Try reading it in English", if no page found in a foreign locale
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- feeds (it seems diffcult to pull locale here)
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We do not translate:
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- stdout traces (logging is English-only)
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*/
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