| 42 | } |
| 43 | |
| 44 | func validate(v reflect.Value, path interface{}) []error { |
| 45 | var errs []error |
| 46 | switch v.Kind() { |
| 47 | case reflect.Ptr: |
| 48 | if v.IsNil() { |
| 49 | return nil |
| 50 | } |
| 51 | errs = append(errs, validate(v.Elem(), path)...) |
| 52 | case reflect.Slice: |
| 53 | for i := 0; i < v.Len(); i++ { |
| 54 | errs = append(errs, validate(v.Index(i), fmt.Sprintf("%s[%d]", path, i))...) |
| 55 | } |
| 56 | case reflect.Map: |
| 57 | for _, key := range v.MapKeys() { |
| 58 | errs = append(errs, validate(v.MapIndex(key), |
| 59 | fmt.Sprintf("%s[%s]", path, key.Interface()))...) |
| 60 | } |
| 61 | case reflect.Struct: |
| 62 | for i := 0; i < v.NumField(); i++ { |
| 63 | // Skip non-exported fields. |
| 64 | if !v.Field(i).CanInterface() { |
| 65 | continue |
| 66 | } |
| 67 | |
| 68 | errs = append(errs, validate(v.Field(i), |
| 69 | fmt.Sprintf("%s.%s", path, v.Type().Field(i).Name))...) |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | if v.Kind() != reflect.Ptr { |
| 74 | vp := reflect.New(v.Type()) |
| 75 | vp.Elem().Set(v) |
| 76 | if validatable, ok := vp.Interface().(Validatable); ok { |
| 77 | for _, err := range validatable.Validate() { |
| 78 | if err != nil { |
| 79 | errs = append(errs, errors.Wrapf(err, "error found at %s", path)) |
| 80 | } |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | return errs |
| 86 | } |