Project structure refactor:

- Change package name general_server to gateway
- Changing the structure of directories and packages
- Adding vendor to the project

vendor/github.com/spf13/cast/slice.go

@@ -0,0 +1,106 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package cast
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// ToSliceE casts any value to a []any type.
+func ToSliceE(i any) ([]any, error) {
+	i, _ = indirect(i)
+
+	var s []any
+
+	switch v := i.(type) {
+	case []any:
+		// TODO: use slices.Clone
+		return append(s, v...), nil
+	case []map[string]any:
+		for _, u := range v {
+			s = append(s, u)
+		}
+
+		return s, nil
+	default:
+		return s, fmt.Errorf(errorMsg, i, i, s)
+	}
+}
+
+func toSliceE[T Basic](i any) ([]T, error) {
+	v, ok, err := toSliceEOk[T](i)
+	if err != nil {
+		return nil, err
+	}
+
+	if !ok {
+		return nil, fmt.Errorf(errorMsg, i, i, []T{})
+	}
+
+	return v, nil
+}
+
+func toSliceEOk[T Basic](i any) ([]T, bool, error) {
+	i, _ = indirect(i)
+	if i == nil {
+		return nil, true, fmt.Errorf(errorMsg, i, i, []T{})
+	}
+
+	switch v := i.(type) {
+	case []T:
+		// TODO: clone slice
+		return v, true, nil
+	}
+
+	kind := reflect.TypeOf(i).Kind()
+	switch kind {
+	case reflect.Slice, reflect.Array:
+		s := reflect.ValueOf(i)
+		a := make([]T, s.Len())
+
+		for j := 0; j < s.Len(); j++ {
+			val, err := ToE[T](s.Index(j).Interface())
+			if err != nil {
+				return nil, true, fmt.Errorf(errorMsg, i, i, []T{})
+			}
+
+			a[j] = val
+		}
+
+		return a, true, nil
+	default:
+		return nil, false, nil
+	}
+}
+
+// ToStringSliceE casts any value to a []string type.
+func ToStringSliceE(i any) ([]string, error) {
+	if a, ok, err := toSliceEOk[string](i); ok {
+		if err != nil {
+			return nil, err
+		}
+
+		return a, nil
+	}
+
+	var a []string
+
+	switch v := i.(type) {
+	case string:
+		return strings.Fields(v), nil
+	case any:
+		str, err := ToStringE(v)
+		if err != nil {
+			return nil, fmt.Errorf(errorMsg, i, i, a)
+		}
+
+		return []string{str}, nil
+	default:
+		return nil, fmt.Errorf(errorMsg, i, i, a)
+	}
+}