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import path from "path";
import { ImportManager } from "import-manager";
import sharedModules from "../utils/shared-modules.js";
/**
* Webpack loader that arranges shared modules in dependency order.
* As each shared module is processed, its own shared-module dependencies
* are inserted before it in the global `sortedSharedModules` array so that
* the final output respects the import graph.
*
* @param {string} source - The source code of the current module.
* @returns {string} The unmodified source (this loader is side-effect only).
*/
export default function(source) {
const currentSharedModuleName = path.basename(this.resourcePath.substring(0, this.resourcePath.length - 3));
if (sharedModules.includes(currentSharedModuleName)) {
const { sortedSharedModules } = this.getOptions();
const manager = new ImportManager(source);
const modulesToBeIncluded = [];
for (const unit of manager.imports.es6.units) {
const moduleIndex = sharedModules.indexOf(unit.module.name);
if (moduleIndex >= 0) {
const currentSharedModuleName = sharedModules[moduleIndex];
if (!(sortedSharedModules.includes(currentSharedModuleName) || modulesToBeIncluded.includes(currentSharedModuleName))) {
modulesToBeIncluded.push(currentSharedModuleName);
}
}
}
const currentModuleIndex = sortedSharedModules.indexOf(currentSharedModuleName);
if (currentModuleIndex >= 0) {
for (const sharedModule of modulesToBeIncluded) {
sortedSharedModules.splice(currentModuleIndex, 0, sharedModule);
}
} else {
for (const sharedModule of modulesToBeIncluded) {
sortedSharedModules.push(sharedModule);
}
sortedSharedModules.push(currentSharedModuleName);
}
}
return source;
};
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