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package middleware
import (
"cmp"
"context"
"errors"
"log"
"net/http"
"strings"
"git.thomasvoss.com/euro-cash.eu/i18n"
"git.thomasvoss.com/euro-cash.eu/templates"
)
const PrinterKey = "printer"
func I18n(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var p, pZero i18n.Printer
if c, err := r.Cookie("lang"); errors.Is(err, http.ErrNoCookie) {
log.Println("Language cookie not set")
} else {
var ok bool
p, ok = i18n.Printers[strings.ToLower(c.Value)]
if !ok {
log.Printf("Language ‘%s’ is unsupported\n", c.Value)
}
}
used := cmp.Or(p, i18n.DefaultPrinter)
ctx := context.WithValue(r.Context(), PrinterKey, used)
if p == pZero {
templates.Root(nil, templates.SetLanguage()).Render(ctx, w)
/* TODO: Redirect the user back to where they came from */
} else {
next.ServeHTTP(w, r.WithContext(ctx))
}
})
}
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