mutants-appfx/src/ruleset/index.js

appfx module

import nools from 'nools';
import {
  api
} from 'mutants-microfx';
import DataProviderManager from '../DataProviderManager';

let gid = 0;

// 分配全局id
const assignId = () => {
  // 每次加一
  gid = gid + 1;
  return gid;
}

const toArray = (val) => {
  return Array.isArray(val) ? val : [val];
}

export default class RuleSet {
  flow;
  name;

  constructor(noolsSource = [], define, scope) {
    this.name = 'RuleSet' + assignId();
    this.flow = nools.compile(noolsSource, {
      define,
      scope,
      name: this.name
    });
  }

  execute(facts) {
    const session = this.flow.getSession(...facts);
    return session.match(() => {
      session.dispose();
    });
  }

  dispose() {
    nools.deleteFlow(this.name);
    this.flow = null;
  }

  static async load({
    sysid,
    mid
  }, define, scope) {
    const rules = (await DataProviderManager.getRule({sysid,mid})).data.data;
    const src = rules.reduce((ret, it) => {
      if (typeof it === 'string') {
        ret.push(it);
      } else {
        ret.push("rule '" + it.name + "' {" +
          "when {" + toArray(it.when).join(';') + "}" +
          "then {" + toArray(it.then).join(';') + "}" +
          "}");
      }
      return ret;
    }, []);
    return new RuleSet(src.join('\n'), define, scope);
  }
}