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reflection.go
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reflection.go
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package goclitools
import (
"fmt"
"reflect"
"strings"
)
// ReflectionFill ...
func ReflectionFill(o interface{}) error {
return ReflectionFillUsingObject(o, false)
}
// ReflectionFillUsingObject ...
func ReflectionFillUsingObject(o interface{}, useExistingValues bool) error {
v := reflect.ValueOf(o)
if v.Kind() == reflect.Ptr && !v.IsNil() {
v = v.Elem()
}
t := v.Type()
for i := 0; i < v.NumField(); i++ {
typeField := t.Field(i)
field := v.Field(i)
tag := typeField.Tag
if field.IsValid() && field.CanSet() {
switch typeField.Type.Kind() {
case reflect.Bool:
defaultValue := true
if useExistingValues {
defaultValue = field.Bool()
}
field.SetBool(ConfirmWithDefault(typeField.Name, defaultValue))
break
case reflect.String:
optionsString := tag.Get("options")
var promptText string
if useExistingValues {
promptText = fmt.Sprintf("%s (%s)", typeField.Name, field.String())
} else {
promptText = typeField.Name
}
if optionsString != "" {
options := strings.Split(optionsString, ",")
index, err := PromptWithChoice(promptText, options)
if err != nil {
return err
}
field.SetString(options[index])
} else {
value := Prompt(promptText)
if useExistingValues && value == "" {
break
}
field.SetString(value)
}
break
}
}
}
return nil
}