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package cc
import (
"fmt"
"reflect"
"time"
)
// TODO(damnever): cache used value
// Value implements the Valuer interface.
type Value struct {
v interface{}
}
// NewValue creates a new Value.
func NewValue(v interface{}) *Value {
return &Value{v: v}
}
// Exist returns true is value is a valid value, otherwise false.
func (v *Value) Exist() bool {
if v.v == nil {
return false
}
return reflect.ValueOf(v.v).IsValid()
}
// Pattern returns a Patterner.
func (v *Value) Pattern() Patterner {
return NewPattern(v.String())
}
// Raw returns the raw value.
func (v *Value) Raw() interface{} {
return v.v
}
// Config returns the value as a Configer, the modification on returned
// Configer has no affect to the origin value.
func (v *Value) Config() Configer {
switch x := v.v.(type) {
case Configer:
val := newConfig()
for kx, kv := range x.KV() {
val.kv[kx] = kv
}
return val
case map[string]interface{}:
val := newConfig()
for kx, kv := range x {
val.kv[kx] = kv
}
return val
case map[interface{}]interface{}:
val := newConfig()
val.kv = unknownMapToStringMap(x)
return val
}
return newConfig()
}
// Map returns the value as a map, the modification on returned
// map has no affect to the origin value.
func (v *Value) Map() map[string]Valuer {
switch x := v.v.(type) {
case Configer:
val := x.KV()
ms := make(map[string]Valuer, len(val))
for kx, vx := range val {
ms[kx] = NewValue(vx)
}
return ms
case map[string]interface{}:
ms := make(map[string]Valuer, len(x))
for kx, vx := range x {
ms[kx] = NewValue(vx)
}
return ms
case map[interface{}]interface{}:
ms := make(map[string]Valuer, len(x))
for kx, kv := range x {
ms[fmt.Sprintf("%v", kx)] = NewValue(kv)
}
return ms
}
return map[string]Valuer{}
}
// List returns the value as slice, the modification on returned
// slice has no affect to the origin value.
func (v *Value) List() []Valuer {
if x, ok := v.v.([]interface{}); ok {
vs := make([]Valuer, len(x))
for i, e := range x {
vs[i] = NewValue(e)
}
return vs
}
return []Valuer{}
}
// String returns the string value, returns "" if not exists.
func (v *Value) String() string {
return v.StringOr("")
}
// StringOr returns the string value, returns the deflt if not exists.
func (v *Value) StringOr(deflt string) string {
return toString(v.v, deflt)
}
// StringAnd returns the (string value, true) if pattern matched,
// otherwise returns ("", false).
func (v *Value) StringAnd(pattern string) (string, bool) {
if !v.Exist() {
return "", false
}
p := NewPattern(pattern)
if s := v.String(); p.ValidateString(s) {
return s, true
}
return "", false
}
// StringAndOr returns the string value if pattern matched,
// otherwise returns the deflt.
func (v *Value) StringAndOr(pattern string, deflt string) string {
if s, ok := v.StringAnd(pattern); ok {
return s
}
return deflt
}
// Bool returns the bool value, returns false if not exists.
func (v *Value) Bool() bool {
return v.BoolOr(false)
}
// BoolOr returns the bool value, returns the deflt if not exists.
func (v *Value) BoolOr(deflt bool) bool {
return toBool(v.v, deflt)
}
// Int returns the int value, returns 0 if not exists.
func (v *Value) Int() int {
return v.IntOr(0)
}
// IntOr returns the int value, returns the deflt if not exists.
func (v *Value) IntOr(deflt int) int {
return toInt(v.v, deflt)
}
// IntAnd returns the (int value, true) if pattern matched,
// otherwise returns (0, false).
func (v *Value) IntAnd(pattern string) (int, bool) {
if !v.Exist() {
return 0, false
}
p := NewPattern(pattern)
if n := v.Int(); p.ValidateInt(n) {
return n, true
}
return 0, false
}
// IntAndOr returns the int value if pattern matched,
// otherwise returns the deflt.
func (v *Value) IntAndOr(pattern string, deflt int) int {
if n, ok := v.IntAnd(pattern); ok {
return n
}
return deflt
}
// Int64 returns the int64 value, returns 0 if not exists.
func (v *Value) Int64() int64 {
return v.Int64Or(0)
}
// Int64Or returns the int64 value, returns the deflt if not exists.
func (v *Value) Int64Or(deflt int64) int64 {
return toInt64(v.v, deflt)
}
// Int64And returns the (int64 value, true) if pattern matched,
// otherwise returns (0, false). NOTE: we convert all numbers into
// float64 then validate.
func (v *Value) Int64And(pattern string) (int64, bool) {
if !v.Exist() {
return 0, false
}
p := NewPattern(pattern)
if n := v.Int64(); p.ValidateFloat(float64(n)) {
return n, true
}
return 0, false
}
// Int64AndOr returns the int value if pattern matched,
// otherwise returns the deflt. NOTE: we convert all numbers into
// float64 then validate.
func (v *Value) Int64AndOr(pattern string, deflt int64) int64 {
if n, ok := v.Int64And(pattern); ok {
return n
}
return deflt
}
// Float returns the float64 value, returns 0.0 if not exists.
func (v *Value) Float() float64 {
return v.FloatOr(0.0)
}
// FloatOr returns the float64 value, return the deflt if not exists.
func (v *Value) FloatOr(deflt float64) float64 {
return toFloat64(v.v, deflt)
}
// FloatAnd returns the (float64 value, true) if pattern matched,
// otherwise returns (0.0, false).
func (v *Value) FloatAnd(pattern string) (float64, bool) {
if !v.Exist() {
return 0.0, false
}
p := NewPattern(pattern)
if n := v.Float(); p.ValidateFloat(n) {
return n, true
}
return 0.0, false
}
// FloatAndOr returns the float64 value if pattern matched,
// otherwise returns the deflt.
func (v *Value) FloatAndOr(pattern string, deflt float64) float64 {
if n, ok := v.FloatAnd(pattern); ok {
return n
}
return deflt
}
// Duration returns the time.Duration value, returns time.Duration(0) if not exists.
func (v *Value) Duration() time.Duration {
return v.DurationOr(0)
}
// DurationOr returns the time.Duration value, returns time.Duration(deflt)
// if not exists.
func (v *Value) DurationOr(deflt int64) time.Duration {
return time.Duration(v.Int64Or(deflt))
}
// DurationAnd returns the (time.Duration(value), true) if pattern matched,
// otherwise (time.Duration(0), false) returned. NOTE: we convert all numbers
// into float64 then validate.
func (v *Value) DurationAnd(pattern string) (time.Duration, bool) {
n, ok := v.Int64And(pattern)
return time.Duration(n), ok
}
// DurationAndOr returns the time.Duration value if pattern matched,
// otherwise returns the deflt. NOTE: we convert all numbers into
// float64 then validate.
func (v *Value) DurationAndOr(pattern string, deflt int64) time.Duration {
if d, ok := v.DurationAnd(pattern); ok {
return d
}
return time.Duration(deflt)
}
// GoString implements the native format for Value
func (v *Value) GoString() string {
return fmt.Sprintf("%v", v.v)
}