{{end}}`
defaultSignInTemplate = `{{define "sign_in.html"}}
Sign In
{{ if .CustomLogin }}
{{end}}`
)
// LoadTemplates adds the Sign In and Error templates from the custom template
// directory, or uses the defaults if they do not exist or the custom directory
// is not provided.
func LoadTemplates(customDir string) (*template.Template, error) {
t := template.New("").Funcs(template.FuncMap{
"ToUpper": strings.ToUpper,
"ToLower": strings.ToLower,
})
var err error
t, err = addTemplate(t, customDir, signInTemplateName, defaultSignInTemplate)
if err != nil {
return nil, fmt.Errorf("could not add Sign In template: %v", err)
}
t, err = addTemplate(t, customDir, errorTemplateName, defaultErrorTemplate)
if err != nil {
return nil, fmt.Errorf("could not add Error template: %v", err)
}
return t, nil
}
// addTemplate will add the template from the custom directory if provided,
// else it will add the default template.
func addTemplate(t *template.Template, customDir, fileName, defaultTemplate string) (*template.Template, error) {
filePath := filepath.Join(customDir, fileName)
if customDir != "" && isFile(filePath) {
t, err := t.ParseFiles(filePath)
if err != nil {
return nil, fmt.Errorf("failed to parse template %s: %v", filePath, err)
}
return t, nil
}
t, err := t.Parse(defaultTemplate)
if err != nil {
// This should not happen.
// Default templates should be tested and so should never fail to parse.
logger.Panic("Could not parse defaultTemplate: ", err)
}
return t, nil
}
// isFile checks if the file exists and checks whether it is a regular file.
// If either of these fail then it cannot be used as a template file.
func isFile(fileName string) bool {
info, err := os.Stat(fileName)
if err != nil {
logger.Errorf("Could not load file %s: %v, will use default template", fileName, err)
return false
}
return info.Mode().IsRegular()
}