fox/mapstruct/hooks.go

package mapstruct

import (
	"fmt"
	"reflect"
	"strconv"
)

// applyStructToMapHook applies hooks for struct-to-map conversion.
func applyStructToMapHook(v reflect.Value, field reflect.StructField, opts *Options) (any, bool, error) {
	// Check field-specific hooks first
	if hook, ok := opts.FieldHooks[field.Name]; ok {
		result, err := hook(v, field)
		return result, true, err
	}

	// Check type hooks
	if hook, ok := opts.TypeHooks[v.Type()]; ok {
		result, err := hook(v, field)
		return result, true, err
	}

	// Handle pointers
	if v.Kind() == reflect.Ptr {
		if v.IsNil() {
			return nil, true, nil
		}
		v = v.Elem()
		if hook, ok := opts.TypeHooks[v.Type()]; ok {
			result, err := hook(v, field)
			return result, true, err
		}
	}

	return nil, false, nil
}

// applyMapToStructHook applies hooks for map-to-struct conversion.
func applyMapToStructHook(value string, field reflect.StructField, opts *Options) (any, error) {
	// Check field-specific hooks
	if hook, ok := opts.FieldHooks[field.Name]; ok {
		return hook(reflect.ValueOf(value), field)
	}

	// Check type hooks
	if hook, ok := opts.StringTypeHooks[field.Type]; ok {
		return hook(value, field)
	}

	// Handle basic types
	switch field.Type.Kind() {
	case reflect.String:
		return value, nil
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.ParseInt(value, 10, 64)
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return strconv.ParseUint(value, 10, 64)
	case reflect.Float32, reflect.Float64:
		return strconv.ParseFloat(value, 64)
	case reflect.Bool:
		return strconv.ParseBool(value)
	default:
		return nil, fmt.Errorf("unsupported type: %s", field.Type.String())
	}
}

//// getFieldName extracts the field name from struct tags.
//func getFieldName(field reflect.StructField, tagName string) (string, bool) {
//	if tag, ok := field.Tag.Lookup(tagName); ok {
//		if tag == "-" {
//			return "", true
//		}
//		if commaIdx := strings.Index(tag, ","); commaIdx != -1 {
//			tag = tag[:commaIdx]
//		}
//		if tag != "" {
//			return tag, false
//		}
//	}
//	return field.Name, false
//}