@eva/react-eva/lib/hooks/useResource.js

React EVA是一个让开发同学能够在React技术体系下，利用EVA JS的游戏研发能力，开发动画、游戏类场景的框架。它可以让开发同学用熟悉的JSX和Hooks语法编写动画、游戏场景的代码。

"use strict";

exports.__esModule = true;
exports["default"] = useResource;

var _react = require("react");

var _eva = require("@eva/eva.js");

var resourceCount = 0;
var resourceNameMap = {};

function useResource(_ref) {
  var name = _ref.name,
      type = _ref.type,
      src = _ref.src,
      preload = _ref.preload;
  var urls = Object.keys(src).sort().map(function (key) {
    if (typeof src[key] === 'string') {
      return src[key];
    } else {
      return src[key].url || src[key].src;
    }
  });
  return (0, _react.useMemo)(function () {
    var mapKey = urls.join('|');
    var resourceCacheName = resourceNameMap[mapKey];
    var resourceName;

    if (resourceCacheName !== undefined && (name === undefined || name === resourceCacheName)) {
      resourceName = resourceCacheName;
    } else {
      resourceName = name || "resource_" + type + "_" + ++resourceCount;
      resourceNameMap[mapKey] = resourceName;

      _eva.resource.addResource([{
        name: resourceName,
        type: type,
        src: src,
        preload: preload !== null && preload !== void 0 ? preload : true
      }]);
    }

    return resourceName;
  }, urls);
}