func readTemplate(appname string) (*viper.Viper, error) {
aux := viper.New()
aux.SetConfigName("config")
aux.AddConfigPath("apps/" + appname + "/")
err := aux.ReadInConfig()
return aux, err
}
// ReplacePlaceholders generated a config file using the base config file for appname by replacing the possible placeholders
// that the config fiel might have given a group of labels. These labels are used to retrieve the placeholders stored values
func ReplacePlaceholders(s storage.Storage) func(c *gin.Context) {
return func(c *gin.Context) {
name := c.Param("appname")
labels := c.DefaultQuery("labels", "default")
renderType := c.Param("format")
list := make(map[string]*placeholders.Placeholder)
myViper, err := readTemplate(name)
if err != nil {
c.String(http.StatusNotFound, "")
} else {
properties := placeholders.GetPlaceHolders(myViper)
for _, v := range properties.Placeholders {
list[v.PlaceHolder] = v
}
lbls := strings.Split(labels, ",")
// MERGE values of different labels, last overrides current value
for _, label := range lbls {
l := s.GetOptions(name, label)
for k, v := range l {
if list[k] != nil {
list[k].PropertyValue = v
}
}
}
template := replaceTemplatePlaceHolders(myViper, list)
extension := getFileExtension(myViper)
replacedViper := viper.New()
replacedViper.SetConfigType(extension)
replacedViper.ReadConfig(bytes.NewBuffer([]byte(template)))
b, err := render(replacedViper, renderType)
if err == nil {
c.Data(http.StatusOK, "text/plain", b)
}
if err != nil {
c.String(http.StatusInternalServerError, "Could not render %s", err)
}
}
}
}