UI5 AMD Shim

AMDShim.ts

sap.ui.define([], function () {

  function jsInteropDefaultRequire(importedModule) {
    if (importedModule && importedModule.__esModule) {
      const exportedProps = Object.keys(importedModule);
      if (exportedProps.length === 1 && exportedProps[0] === 'default') {
        return importedModule.default;
      }
    }
    return importedModule;
  }

  const originalSapDefine = sap.ui.define;

  sap.ui.define = function newDefine(depArr, moduleFactory, ...args) {
    const exportsIndices: Array<number> = [];

    if (Array.isArray(depArr)) {
      depArr = depArr.map((dep, i) => {
        switch (dep) {
          case 'require':
            return 'sap/ui/base/Object';
          case 'exports':
            exportsIndices.push(i);
            return 'sap/ui/base/Object';
          default:
            return dep;
        }
      });

      if (exportsIndices.length > 0) {
        // seems like typescript generated module (and non-ui5 classic module). 
        moduleFactory = wrapModuleFactoryForTSModule(moduleFactory, exportsIndices);
      } else {
        moduleFactory = wrapModuleFactoryForJSModule(moduleFactory);
      }
    }

    return originalSapDefine.call(sap.ui, depArr, moduleFactory, ...args);
  } as any;

  function wrapModuleFactoryForTSModule(moduleFactory, exportIndices) {
    return function tsModuleWrapper(...imports) {
      const exports = {};
      exportIndices.forEach(exportIndex => imports[exportIndex] = exports);
      return moduleFactory(...imports) || exports;
    }
  }

  function wrapModuleFactoryForJSModule(moduleFactory) {
    return function jsModuleWrapper(...imports) {
      return moduleFactory(...imports.map(jsInteropDefaultRequire));
    };
  }

  window['define'] = sap.ui.define;

});