//0：在排队 1:处理中 2 订单完成 3 订单取消 4 超时处理
const ShopOrderMap={}
class Order {
constructor(name){
this.name=name||'test';
if(!ShopOrderMap[name]){
ShopOrderMap[name]={
bit:[],
curN:0,
orderMap:{}//待处理的订单
};
}
this.shopOrder=ShopOrderMap[this.name];
//新增加一个订单
this.myN=this.shopOrder.bit.length;
this.shopOrder.bit[this.myN]='0';
this.shopOrder.orderMap[this.myN]=this;
}
//排队
wait(overTime){
return new Promise((res)=> {
this.res=res;
//没有人排队，处理当前订单
this.resolve()
})
if(overTime){
this.timeInter=setTimeout(()=>{
this.reject()
},overTime)
}
}
//排队处理订单
resolve(){
if(this.myN===this.shopOrder.curN){
if(this.shopOrder.bit[this.myN]==='0'){
this.shopOrder.bit[this.myN]='1';
if(this.res){
this.res({flag:'S'})
}
delete this.res;
delete this.shopOrder.orderMap[this.myN];
}else if(this.shopOrder.bit[this.myN]!=='1'){
this.end()
}
}
}
//处理当前订单
reject(){
if(this.shopOrder.bit[this.myN]==='0'){
this.shopOrder.bit[this.myN]='4';
if(this.res){
this.res({
flag:'F',msg:'任务超时'
})
}
this.end()
}
}
//激活一个订单
active(){
if(this.myN>this.shopOrder.curN&&this.shopOrder.bit[this.myN]==='3'){//取消一个订单
this.shopOrder.bit[this.myN]='0';
}
}
//取消一个订单
end(){
if(this.timeInter){
clearTimeout(this.timeInter);
this.timeInter=null;
}
if(this.myN===this.shopOrder.curN){
if(this.shopOrder.bit[this.myN]==='1'){
this.shopOrder.bit[this.myN]='2';
}
this.shopOrder.curN++
if(this.shopOrder.curN<this.shopOrder.bit.length){
this.shopOrder.orderMap[this.shopOrder.curN].resolve();
}
}else if(this.myN>this.shopOrder.curN&&this.shopOrder.bit[this.myN]==='0'){//取消一个订单
this.shopOrder.bit[this.myN]='3';
}
}
}
function sleep(time) {
return new Promise((res)=>{
setTimeout(res,time)
})
}
async function init() {
//生成一个订单
const order=new Order('test')
const res=await order.wait();//等待其他订单处理完成
await sleep(1000)
console.log('order1',res)
order.end()
}
async function init2() {
//生成一个订单
const order=new Order('test')
const res=await order.wait(8000);//等待其他订单处理完成
console.log('order2',res)
order.end()
}
init()
init2()
