@sepveneto/mpd-core/dist/chunk-JQMQKYQH.js

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

import {
  __decorateClass
} from "./chunk-SW7HDZD2.js";

// src/upgrade/fsm.ts
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)];
}

export {
  VersionMachine
};