authorizer/server/utils/common.go

package utils

import (
	"reflect"
)

// StringSliceContains checks if a string slice contains a particular string
func StringSliceContains(s []string, e string) bool {
	for _, a := range s {
		if a == e {
			return true
		}
	}
	return false
}

// RemoveDuplicateString removes duplicate strings from a string slice
func RemoveDuplicateString(strSlice []string) []string {
	allKeys := make(map[string]bool)
	list := []string{}
	for _, item := range strSlice {
		if _, value := allKeys[item]; !value {
			allKeys[item] = true
			list = append(list, item)
		}
	}
	return list
}

// ConvertInterfaceToSlice to convert interface to slice interface
func ConvertInterfaceToSlice(slice interface{}) []interface{} {
	s := reflect.ValueOf(slice)
	if s.Kind() != reflect.Slice {
		return nil
	}

	// Keep the distinction between nil and empty slice input
	if s.IsNil() {
		return nil
	}

	ret := make([]interface{}, s.Len())

	for i := 0; i < s.Len(); i++ {
		ret[i] = s.Index(i).Interface()
	}

	return ret
}