kitten-cloud-function
Version:
用于编程猫源码云功能（云变量、云列表等）的客户端工具
63 lines (62 loc) • 1.97 kB
JavaScript
import { None } from "../../../../utils/other";
import { KittenCloudDataUpdateSource } from "../kitten-cloud-data-update-source";
import { KittenCloudListUpdateCommand } from "./kitten-cloud-list-update-command";
export class KittenCloudListReplaceLastCommand extends KittenCloudListUpdateCommand {
constructor(source, list, value) {
super(source, list);
this.list = list;
this.value = value;
this.effective = None;
this.backup = 0;
}
execute() {
if (this.effective != None) {
throw new Error("无法执行命令：命令已被执行，不能重复执行");
}
this.effective = this.list.length > 0;
if (this.effective) {
this.backup = this.list.value.splice(-1, 1, this.value)[0];
this.list.replacedLast.emit({
source: this.source,
originalItem: this.backup,
newItem: this.value
});
}
}
revoke() {
if (this.effective == None) {
throw new Error("无法撤销命令：命令尚未执行");
}
if (this.effective) {
this.list.value.splice(-1, 1, this.backup);
this.list.replacedLast.emit({
source: KittenCloudDataUpdateSource.REVOKE,
originalItem: this.value,
newItem: this.backup
});
}
this.effective = None;
}
isEffective() {
return this.effective == None ? this.list.length > 0 : this.effective;
}
isLegal() {
return true;
}
toJSON() {
return {
method: "replaceLast",
value: this.value
};
}
toCloudJSON() {
return {
action: "replace",
nth: "last",
value: this.value
};
}
toString() {
return `替换云列表 ${this.data.name} 最后一项为 ${JSON.stringify(this.value)} `;
}
}