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package generator
import (
"log"
"codeberg.org/snonux/snonux/internal/generator/templates"
)
// fallbackThemeName is returned by getTheme when an unknown name is requested,
// matching the previous behaviour of the hand-maintained themeRegistry map.
const fallbackThemeName = "neon"
// themeSet caches the list of theme names available in the embedded template FS
// so ListThemes and getTheme do not re-read the directory on every call.
var themeSet = loadThemeSet()
func loadThemeSet() map[string]struct{} {
names, err := templates.ThemeNames()
if err != nil {
// At build time the embed //go:embed directive guarantees the FS is
// populated, so this should never happen; log and continue with an
// empty set so getTheme() falls back cleanly.
log.Printf("warning: could not enumerate themes from embedded FS: %v", err)
return map[string]struct{}{}
}
out := make(map[string]struct{}, len(names))
for _, n := range names {
out[n] = struct{}{}
}
return out
}
// getTheme returns the HTML template body for the given theme name, loading it
// from the embedded template FS. It falls back to the neon theme if the name
// is unknown (preserving previous behaviour of the hand-maintained map).
func getTheme(name string) string {
if _, ok := themeSet[name]; !ok {
name = fallbackThemeName
}
body, err := templates.Theme(name)
if err != nil {
// Last-resort fallback: try neon. If that also fails, return an empty
// string; template.Parse will then produce a diagnostic error.
if body, err = templates.Theme(fallbackThemeName); err != nil {
log.Printf("warning: could not load fallback theme %q: %v", fallbackThemeName, err)
return ""
}
}
return body
}
// ListThemes returns a sorted list of all available theme names.
func ListThemes() []string {
names, err := templates.ThemeNames()
if err != nil {
log.Printf("warning: could not list themes from embedded FS: %v", err)
return nil
}
return names
}
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