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add defaultIfEmpty function for template default values

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This commit is contained in:
Pedro Pérez 2024-11-24 23:01:51 +01:00
parent 5183e62271
commit 8da9de3177
1 changed files with 9 additions and 0 deletions
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9
template.go
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@ -56,10 +56,19 @@ func (re *Render) apply(opts ...RenderOptions) *Render {
return re return re
} }
func defaultIfEmpty(fallback, value string) string {
if strings.TrimSpace(value) == "" {
return fallback
}
return value
}
func (re *Render) Template(w http.ResponseWriter, tmpl string, td *TemplateData) error { func (re *Render) Template(w http.ResponseWriter, tmpl string, td *TemplateData) error {
var tc templateCache var tc templateCache
var err error var err error
re.Functions["default"] = defaultIfEmpty
if td == nil { if td == nil {
td = &TemplateData{} td = &TemplateData{}
} }