@sepveneto/mpd-core/dist/upgrade/fsm.cjs

## 安装 ```cmd pnpm i @sepveneto/mpd-core npm i @sepveneto/mpd-core yarn add @sepveneto/mpd-core ```

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var __decorateClass = (decorators, target, key, kind) => {
  var result = kind > 1 ? void 0 : kind ? __getOwnPropDesc(target, key) : target;
  for (var i = decorators.length - 1, decorator; i >= 0; i--)
    if (decorator = decorators[i])
      result = (kind ? decorator(target, key, result) : decorator(result)) || result;
  if (kind && result) __defProp(target, key, result);
  return result;
};

// src/upgrade/fsm.ts
var fsm_exports = {};
__export(fsm_exports, {
  VersionMachine: () => VersionMachine
});
module.exports = __toCommonJS(fsm_exports);
var StateV1 = class {
  constructor(context) {
    this.VERSION = "1.0";
    this.context = context;
    this.origin = this.context.data;
  }
  updateVersion() {
    this.upgrade();
  }
  upgrade() {
    this.origin.version = "1.0";
  }
};
__decorateClass([
  shouldUpdate
], StateV1.prototype, "upgrade", 1);
var VersionMachine = class {
  constructor(data) {
    this.data = JSON.parse(JSON.stringify(data));
    this.current = new StateV1(this);
  }
  setVersion(state) {
    this.current = state;
  }
  getVersion() {
    return this.data.version;
  }
  upgrade() {
    this.current.updateVersion();
    return this.current.origin;
  }
};
function shouldUpdate(target, propertyKey, descriptor) {
  const fn = descriptor.value;
  descriptor.value = function(...args) {
    const current = extractVersion(this.origin.version);
    const target2 = extractVersion(this.VERSION);
    if (isSmaller(current, target2)) {
      return fn.apply(this, args);
    } else {
      return () => ({});
    }
  };
}
function isSmaller(a, b) {
  return a.reduce((flag, curr, index) => {
    flag = curr < b[index];
    return flag;
  }, false);
}
function extractVersion(version) {
  var _a;
  if (!version) {
    return [0];
  }
  if (typeof version === "number") {
    throw new Error(`[@sepveneto/mpd-core] version ${version} must be string.`);
  }
  const [, major, patch] = (_a = version.match(/^([0-9]+)\.([0-9]+)$/)) != null ? _a : [];
  if (!major || !patch) {
    throw new Error(`[@sepveneto/mpd-core] version ${version} is invalid.`);
  }
  return [Number(major), Number(patch)];
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  VersionMachine
});