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safe.go
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safe.go
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/*************************************************************************
* MIT License
* Copyright (c) 2019 Model Rocket
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
// Package safe returns a safe scalar value from a possible nil pointer
package safe
import (
"time"
"github.com/spf13/cast"
)
// String handles nil pointers to always return a valid string
func String(s interface{}, def ...interface{}) string {
val := cast.ToString(s)
if val == "" && len(def) > 0 {
return cast.ToString(def[0])
}
return val
}
// Bool returns a safe bool from the value
func Bool(b interface{}, def ...bool) bool {
switch t := b.(type) {
case bool:
return t
case *bool:
if t == nil {
if len(def) > 0 {
return def[0]
}
break
}
return *t
}
return cast.ToBool(b)
}
// Int64 returns a safe int64 from the value or default if nil
func Int64(i interface{}, def ...int64) int64 {
switch t := i.(type) {
case int64:
return t
case *int64:
if t == nil {
if len(def) > 0 {
return def[0]
}
break
}
return *t
}
return cast.ToInt64(i)
}
// Uint64 returns a safe uint64 from the value or default if nil
func Uint64(i interface{}, def ...uint64) uint64 {
switch t := i.(type) {
case uint64:
return t
case *uint64:
if t == nil {
if len(def) > 0 {
return def[0]
}
break
}
return *t
}
return cast.ToUint64(i)
}
// Int returns a safe int64 from the value or default if nil
func Int(i interface{}, def ...int) int {
switch t := i.(type) {
case int:
return t
case *int:
if t == nil {
if len(def) > 0 {
return def[0]
}
break
}
return *t
}
return cast.ToInt(i)
}
// StrEqual compares to values as strings safely
func StrEqual(s1, s2 interface{}) bool {
return String(s1) == String(s2)
}
// Time returns a safe time
func Time(t interface{}, def ...time.Time) time.Time {
val := cast.ToTime(t)
if val.IsZero() && len(def) > 0 {
return def[0]
}
return val
}