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plist.go
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plist.go
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// Copyright 2023 The Yock Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package yocke
import (
"errors"
"fmt"
"os"
"reflect"
"strconv"
"strings"
"github.com/ansurfen/yock/util"
"howett.net/plist"
)
// PlistFile manage plist, which serves for PosixMetaTable
type PlistFile struct {
file string
fp *os.File
v any
}
// CreatePlistFile create specify plist when plist isn't exist
func CreatePlistFile(file string) (*PlistFile, error) {
fp, err := os.Create(file)
if err != nil {
return nil, err
}
pf := &PlistFile{
fp: fp,
file: file,
}
if err := pf.read(); err != nil {
return pf, err
}
return pf, err
}
// OpenPlistFile open specify plist
func OpenPlistFile(file string) (*PlistFile, error) {
fp, err := os.Open(file)
if err != nil {
return nil, err
}
pf := &PlistFile{
fp: fp,
file: file,
}
if err := pf.read(); err != nil {
return pf, err
}
return pf, err
}
func (pf *PlistFile) read() error {
return plist.NewDecoder(pf.fp).Decode(&pf.v)
}
func (pf *PlistFile) Write() error {
return plist.NewEncoder(pf.fp).Encode(pf.v)
}
// GetValue returns CFValue according to key
func (pf *PlistFile) GetValue(key string) CFValue {
switch vv := pf.v.(type) {
case cfDictionary:
return any2CFValue(vv[key])
default:
if len(key) > 0 {
return CFNone{}
}
}
return any2CFValue(pf.v)
}
// GetBaseValue returns CFValue. If not exist in plist, it'll return CFNone.
func (pf *PlistFile) GetBaseValue() CFValue {
switch vv := pf.v.(type) {
case cfString, cfNumber, cfBool, cfData, cfUID, cfReal:
return any2CFValue(vv)
}
return CFNone{}
}
// GetDict returns CFDictionary. If not exist in plist, it'll return a empty CFDictionary.
func (pf *PlistFile) GetDict() CFDictionary {
switch v := pf.v.(type) {
case cfDictionary:
return CFDictionary{val: v}
default:
fmt.Println(reflect.TypeOf(v))
}
return CFDictionary{}
}
// GetDict returns CFArray. If not exist in plist, it'll return a empty CFArray.
func (pf *PlistFile) GetArr() CFArray {
switch v := pf.GetValue("").(type) {
case CFArray:
return v
}
return CFArray{}
}
// GetArrByField return CFArray according to field
func (pf *PlistFile) GetArrByField(field string) CFArray {
fields := strings.Split(field, ".")
if len(fields) == 0 {
return CFArray{}
}
dict := pf.GetDict()
ret := CFArray{}
for i, f := range fields {
switch v := dict.GetCFValue(f).(type) {
case CFDictionary:
dict = v
case CFArray:
if i == len(fields)-1 {
ret = v
}
default:
return CFArray{}
}
}
return ret
}
func any2CFValue(v any) CFValue {
switch vv := v.(type) {
case string:
return CFString{val: vv}
case uint64:
return CFNumber{val: vv}
case int:
return CFNumber{val: uint64(vv)}
case bool:
return CFBool{val: vv}
case float64:
return CFReal{val: vv}
case []byte:
return CFData{val: vv}
case []any:
return CFArray{val: vv}
case cfDictionary:
return CFDictionary{val: vv}
case plist.UID:
return CFUID{val: vv}
default:
}
return CFNone{}
}
// Set set root element of plist
func (pf *PlistFile) Set(value any) {
pf.v = value
}
// SetByField set element in sprcify field, which support recurse and meant that you can set a.b.c field.
func (pf *PlistFile) SetByField(field string, value CFValue) error {
fields := strings.Split(field, ".")
if len(fields) == 0 {
return nil
}
t := pf.v
sp := len(fields) - 1
stack := make([]cfDictionary, sp)
for i, f := range fields {
switch v := t.(type) {
case cfDictionary:
if i == sp {
v[f] = value
break
}
stack[i] = v
t = v[f]
default:
return errors.New("invalid type")
}
}
return nil
}
// SetByIdx set element in specify position if position is available.
// For map, index will be convert string as key to set.
func (pf *PlistFile) SetByIdx(idx int, value any) error {
if pf.Len() <= idx {
return errors.New("out of range")
}
switch v := pf.v.(type) {
case cfString, cfNumber, cfBool, cfData, cfUID, cfReal:
pf.v = value
case cfArray:
v[idx] = value
pf.v = v
case cfDictionary:
v[strconv.Itoa(idx)] = value
pf.v = v
}
return nil
}
func (pf *PlistFile) Append(value any) error {
return nil
}
// Len return plist length.
// Length of array or map depend on elements amount.
// For other type that include string, date, number and so on, it ever returns 1.
func (pf *PlistFile) Len() int {
switch v := pf.v.(type) {
case cfString, cfNumber, cfBool, cfData, cfUID, cfReal:
return 1
case cfArray:
return len(v)
case cfDictionary:
return len(v)
}
return -1
}
func (pf *PlistFile) SafeSet(key string, value any) error {
switch v := pf.v.(type) {
case string:
pf.v = value
case uint64:
pf.v = value
case map[string]any:
if _, ok := v[key]; !ok {
v[key] = value
pf.v = v
}
case []any:
pf.v = append(v, value)
default:
fmt.Println(reflect.TypeOf(v).String())
}
return nil
}
func (pf *PlistFile) Backup() error {
_, err := util.Exec(fmt.Sprintf("cp %s %s", pf.file,
fmt.Sprintf("%s_%s.plist", util.Filename(pf.file), util.NowTimestampByString())))
return err
}
func (pf *PlistFile) Free() {
pf.fp.Close()
}
func GetPlistValue(v CFValue, name string) CFValue {
switch v.Type() {
case CF_DICT:
dict := v.(CFDictionary)
if d, ok := dict.val[name]; ok {
return any2CFValue(d)
}
case CF_ARR:
default:
}
return CFNone{}
}
const (
CF_DICT = iota
CF_ARR
CF_STR
CF_NUM
CF_BOOL
CF_DATA
CF_UID
CF_REAL
CF_NONE
)
type CFValue interface {
Type() uint8
}
type CFDictionary struct {
val map[string]any
}
func (CFDictionary) Type() uint8 {
return CF_DICT
}
func (c CFDictionary) Foreach(cb func(k string, v CFValue) bool) {
for k, v := range c.val {
if !cb(k, any2CFValue(v)) {
break
}
}
}
func (c CFDictionary) GetCFValue(field string) CFValue {
if v, ok := c.val[field]; ok {
return any2CFValue(v)
}
return CFNone{}
}
func (c CFDictionary) Set(field string, v any) {
c.val[field] = v
}
type CFArray struct {
val []any
}
func (CFArray) Type() uint8 {
return CF_ARR
}
func (c CFArray) Foreach(cb func(idx int, v CFValue) bool) {
for i := 0; i < len(c.val); i++ {
if !cb(i, any2CFValue(c.val[i])) {
break
}
}
}
func (c CFArray) SetByIdx(idx int, v any) error {
if len(c.val) <= idx {
return errors.New("out of range")
}
c.val[idx] = v
return nil
}
func (c CFArray) GetByIdx(idx int) CFValue {
if len(c.val) <= idx {
return CFNone{}
}
return any2CFValue(c.val[idx])
}
func (c CFArray) Copy() CFArray {
arr := CFArray{}
arr.val = append(arr.val, c.val...)
return arr
}
type CFString struct {
val string
}
func (CFString) Type() uint8 {
return CF_STR
}
type CFNumber struct {
val uint64
}
func (CFNumber) Type() uint8 {
return CF_NUM
}
type CFBool struct {
val bool
}
func (CFBool) Type() uint8 {
return CF_BOOL
}
type CFData struct {
val []byte
}
func (CFData) Type() uint8 {
return CF_DATA
}
type CFUID struct {
val plist.UID
}
func (CFUID) Type() uint8 {
return CF_UID
}
type CFReal struct {
val float64
}
func (CFReal) Type() uint8 {
return CF_REAL
}
type CFNone struct{}
func (CFNone) Type() uint8 { return CF_NONE }
type (
cfDictionary = map[string]any
cfArray = []any
cfString = string
cfNumber = int
cfBool = bool
cfData = []byte
cfUID = uint64
cfReal = float64
)