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ListAttr.go
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ListAttr.go
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package entity
import (
"fmt"
"strings"
"github.com/xiaonanln/goworld/engine/gwlog"
)
// ListAttr is a attribute for a list of attributes
type ListAttr struct {
owner *Entity
parent interface{}
pkey interface{} // key of this item in parent
path []interface{}
flag attrFlag
items []interface{}
}
func (a *ListAttr) String() string {
var sb strings.Builder
sb.WriteString("ListAttr{")
isFirstField := true
for _, v := range a.items {
if !isFirstField {
sb.WriteString(", ")
}
switch a := v.(type) {
case *MapAttr:
sb.WriteString(a.String())
case *ListAttr:
sb.WriteString(a.String())
default:
fmt.Fprintf(&sb, "%#v", v)
}
isFirstField = false
}
sb.WriteString("}")
return sb.String()
}
// Size returns size of ListAttr
func (a *ListAttr) Size() int {
return len(a.items)
}
func (a *ListAttr) removeFromParent() {
a.parent = nil
a.pkey = nil
a.clearOwner()
}
func (a *ListAttr) clearOwner() {
a.owner = nil
a.flag = 0
a.path = nil
// clear owner of children recursively
for _, v := range a.items {
switch a := v.(type) {
case *MapAttr:
a.clearOwner()
case *ListAttr:
a.clearOwner()
}
}
}
func (a *ListAttr) setParent(owner *Entity, parent interface{}, pkey interface{}, flag attrFlag) {
a.parent = parent
a.pkey = pkey
a.setOwner(owner, flag)
}
func (a *ListAttr) setOwner(owner *Entity, flag attrFlag) {
a.owner = owner
a.flag = flag
// set owner of children recursively
for _, v := range a.items {
switch a := v.(type) {
case *MapAttr:
a.setOwner(owner, flag)
case *ListAttr:
a.setOwner(owner, flag)
}
}
}
// Set sets item value
func (a *ListAttr) set(index int, val interface{}) {
a.items[index] = val
switch sa := val.(type) {
case *MapAttr:
// val is MapAttr, set parent and owner accordingly
if sa.parent != nil || sa.owner != nil || sa.pkey != nil {
gwlog.Panicf("MapAttr reused in index %d", index)
}
sa.setParent(a.owner, a, index, a.flag)
a.sendListAttrChangeToClients(index, sa.ToMap())
case *ListAttr:
if sa.parent != nil || sa.owner != nil || sa.pkey != nil {
gwlog.Panicf("MapAttr reused in index %d", index)
}
sa.setParent(a.owner, a, index, a.flag)
a.sendListAttrChangeToClients(index, sa.ToList())
default:
a.sendListAttrChangeToClients(index, val)
}
}
func (a *ListAttr) sendListAttrChangeToClients(index int, val interface{}) {
owner := a.owner
if owner != nil {
// send the change to owner's Client
owner.sendListAttrChangeToClients(a, index, val)
}
}
func (a *ListAttr) sendListAttrPopToClients() {
if owner := a.owner; owner != nil {
owner.sendListAttrPopToClients(a)
}
}
func (a *ListAttr) sendListAttrAppendToClients(val interface{}) {
if owner := a.owner; owner != nil {
owner.sendListAttrAppendToClients(a, val)
}
}
func (a *ListAttr) getPathFromOwner() []interface{} {
if a.path == nil {
a.path = a._getPathFromOwner()
}
return a.path
}
func (a *ListAttr) _getPathFromOwner() []interface{} {
path := make([]interface{}, 0, 4)
if a.parent != nil {
path = append(path, a.pkey)
return getPathFromOwner(a.parent, path)
}
return path
}
// Get gets item value
func (a *ListAttr) get(index int) interface{} {
return a.items[index]
}
// GetInt gets item value as int
func (a *ListAttr) GetInt(index int) int64 {
return a.get(index).(int64)
}
// GetFloat gets item value as float64
func (a *ListAttr) GetFloat(index int) float64 {
return a.get(index).(float64)
}
// GetStr gets item value as string
func (a *ListAttr) GetStr(index int) string {
return a.get(index).(string)
}
// GetBool gets item value as bool
func (a *ListAttr) GetBool(index int) bool {
return a.get(index).(bool)
}
// GetListAttr gets item value as ListAttr
func (a *ListAttr) GetListAttr(index int) *ListAttr {
val := a.get(index)
return val.(*ListAttr)
}
// GetMapAttr gets item value as MapAttr
func (a *ListAttr) GetMapAttr(index int) *MapAttr {
val := a.get(index)
return val.(*MapAttr)
}
// AppendInt puts int value to the end of list
func (a *ListAttr) AppendInt(v int64) {
a.append(v)
}
// AppendFloat puts float value to the end of list
func (a *ListAttr) AppendFloat(v float64) {
a.append(v)
}
// AppendBool puts bool value to the end of list
func (a *ListAttr) AppendBool(v bool) {
a.append(v)
}
// AppendStr puts string value to the end of list
func (a *ListAttr) AppendStr(v string) {
a.append(v)
}
// AppendMapAttr puts MapAttr value to the end of list
func (a *ListAttr) AppendMapAttr(attr *MapAttr) {
a.append(attr)
}
// AppendListAttr puts ListAttr value to the end of list
func (a *ListAttr) AppendListAttr(attr *ListAttr) {
a.append(attr)
}
// Pop removes the last item from the end
func (a *ListAttr) pop() interface{} {
size := len(a.items)
val := a.items[size-1]
a.items = a.items[:size-1]
switch sa := val.(type) {
case *MapAttr:
sa.removeFromParent()
case *ListAttr:
sa.removeFromParent()
}
a.sendListAttrPopToClients()
return val
}
func (a *ListAttr) PopInt() int64 {
return a.pop().(int64)
}
func (a *ListAttr) PopFloat() float64 {
return a.pop().(float64)
}
func (a *ListAttr) PopBool() bool {
return a.pop().(bool)
}
func (a *ListAttr) PopStr() string {
return a.pop().(string)
}
// PopListAttr removes the last item and returns as ListAttr
func (a *ListAttr) PopListAttr() *ListAttr {
return a.pop().(*ListAttr)
}
// PopMapAttr removes the last item and returns as MapAttr
func (a *ListAttr) PopMapAttr() *MapAttr {
return a.pop().(*MapAttr)
}
// append puts item to the end of list
func (a *ListAttr) append(val interface{}) {
a.items = append(a.items, val)
index := len(a.items) - 1
switch sa := val.(type) {
case *MapAttr:
// val is ListAttr, set parent and owner accordingly
if sa.parent != nil || sa.owner != nil || sa.pkey != nil {
gwlog.Panicf("MapAttr reused in append")
}
sa.parent = a
sa.owner = a.owner
sa.pkey = index
sa.flag = a.flag
a.sendListAttrAppendToClients(sa.ToMap())
case *ListAttr:
if sa.parent != nil || sa.owner != nil || sa.pkey != nil {
gwlog.Panicf("MapAttr reused in append")
}
sa.setParent(a.owner, a, index, a.flag)
a.sendListAttrAppendToClients(sa.ToList())
default:
a.sendListAttrAppendToClients(val)
}
}
// SetInt sets int value at the index
func (a *ListAttr) SetInt(index int, v int64) {
a.set(index, v)
}
// SetFloat sets float value at the index
func (a *ListAttr) SetFloat(index int, v float64) {
a.set(index, v)
}
// SetBool sets bool value at the index
func (a *ListAttr) SetBool(index int, v bool) {
a.set(index, v)
}
// SetStr sets string value at the index
func (a *ListAttr) SetStr(index int, v string) {
a.set(index, v)
}
// SetMapAttr sets MapAttr value at the index
func (a *ListAttr) SetMapAttr(index int, attr *MapAttr) {
a.set(index, attr)
}
// SetListAttr sets ListAttr value at the index
func (a *ListAttr) SetListAttr(index int, attr *ListAttr) {
a.set(index, attr)
}
// ToList converts ListAttr to slice, recursively
func (a *ListAttr) ToList() []interface{} {
l := make([]interface{}, len(a.items))
for i, v := range a.items {
switch a := v.(type) {
case *MapAttr:
l[i] = a.ToMap()
case *ListAttr:
l[i] = a.ToList()
default:
l[i] = v
}
}
return l
}
// AssignList assigns slice to ListAttr, recursively
func (a *ListAttr) AssignList(l []interface{}) {
for _, v := range l {
switch iv := v.(type) {
case map[string]interface{}:
ia := NewMapAttr()
ia.AssignMap(iv)
a.append(ia)
case []interface{}:
ia := NewListAttr()
ia.AssignList(iv)
a.append(ia)
default:
a.append(uniformAttrType(v))
}
}
}
// NewListAttr creates a new ListAttr
func NewListAttr() *ListAttr {
return &ListAttr{
items: []interface{}{},
}
}