ruoyi-ui/src/plugins/package/utils.js

// 创建监听器实例
export function createListenerObject(options, isTask, prefix) {
  const listenerObj = Object.create(null);
  listenerObj.event = options.event;
  isTask && (listenerObj.id = options.id); // 任务监听器特有的 id 字段
  switch (options.listenerType) {
    case "scriptListener":
      listenerObj.script = createScriptObject(options, prefix);
      break;
    case "expressionListener":
      listenerObj.expression = options.expression;
      break;
    case "delegateExpressionListener":
      listenerObj.delegateExpression = options.delegateExpression;
      break;
    default:
      listenerObj.class = options.class;
  }
  // 注入字段
  if (options.fields) {
    listenerObj.fields = options.fields.map((field) => {
      return createFieldObject(field, prefix);
    });
  }
  // 任务监听器的 定时器 设置
  if (isTask && options.event === "timeout" && !!options.eventDefinitionType) {
    const timeDefinition = window.bpmnInstances.moddle.create(
      "bpmn:FormalExpression",
      { body: options.eventTimeDefinitions }
    );
    const TimerEventDefinition = window.bpmnInstances.moddle.create(
      "bpmn:TimerEventDefinition",
      {
        id: `TimerEventDefinition_${uuid(8)}`,
        [`time${options.eventDefinitionType.replace(/^\S/, (s) =>
          s.toUpperCase()
        )}`]: timeDefinition,
      }
    );
    listenerObj.eventDefinitions = [TimerEventDefinition];
  }
  return window.bpmnInstances.moddle.create(
    `${prefix}:${isTask ? "TaskListener" : "ExecutionListener"}`,
    listenerObj
  );
}

// 创建 监听器的注入字段 实例
export function createFieldObject(option, prefix) {
  const { name, fieldType, string, expression } = option;
  const fieldConfig =
    fieldType === "string" ? { name, string } : { name, expression };
  return window.bpmnInstances.moddle.create(`${prefix}:Field`, fieldConfig);
}

// 创建脚本实例
export function createScriptObject(options, prefix) {
  const { scriptType, scriptFormat, value, resource } = options;
  const scriptConfig =
    scriptType === "inlineScript"
      ? { scriptFormat, value }
      : { scriptFormat, resource };
  return window.bpmnInstances.moddle.create(
    `${prefix}:Script`,
    scriptConfig
  );
}

// 更新元素扩展属性
export function updateElementExtensions(element, extensionList) {
  const extensions = window.bpmnInstances.moddle.create(
    "bpmn:ExtensionElements",
    {
      values: extensionList,
    }
  );
  window.bpmnInstances.modeling.updateProperties(element, {
    extensionElements: extensions,
  });
}

// 创建一个id
export function uuid(length = 8, chars) {
  let result = "";
  let charsString =
    chars || "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
  for (let i = length; i > 0; --i) {
    result += charsString[Math.floor(Math.random() * charsString.length)];
  }
  return result;
}