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package standard
import (
"fmt"
"os"
"text/template"
)
// Templater is the standard implementation of ApplyTemplate using the "text/template" library.
type Templater struct {
templates map[string]*template.Template
}
// GetTemplate attempts to retrieve the template identified with id.
func (templater *Templater) GetTemplate(id string) (*template.Template, bool) {
tpl, found := templater.templates[id]
return tpl, found
}
// SetTemplateString creates a new template from the body and assigns it the id.
func (templater *Templater) SetTemplateString(templateID string, body string) error {
tpl, err := template.New("").Parse(body)
if err != nil {
return fmt.Errorf("parsing template string for ID %q: %w", templateID, err)
}
if templater.templates == nil {
templater.templates = make(map[string]*template.Template, 1)
}
templater.templates[templateID] = tpl
return nil
}
// SetTemplateFile creates a new template from the file and assigns it the id.
func (templater *Templater) SetTemplateFile(templateID string, file string) error {
bytes, err := os.ReadFile(file)
if err != nil {
return fmt.Errorf("reading template file %q for ID %q: %w", file, templateID, err)
}
return templater.SetTemplateString(templateID, string(bytes))
}
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