@storybook/angular
Version:
Storybook for Angular: Develop Angular components in isolation with hot reloading.
42 lines (41 loc) • 1.65 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.isComponentAlreadyDeclared = void 0;
const core_1 = require("@angular/core");
const reflectionCapabilities = new core_1.ɵReflectionCapabilities();
/**
* Avoid component redeclaration
*
* Checks recursively if the component has already been declared in all import Module
*/
const isComponentAlreadyDeclared = (componentToFind, moduleDeclarations, moduleImports) => {
if (moduleDeclarations &&
moduleDeclarations.flat().some((declaration) => declaration === componentToFind)) {
// Found component in declarations array
return true;
}
if (!moduleImports) {
return false;
}
return moduleImports.flat().some((importItem) => {
const extractedNgModuleMetadata = extractNgModuleMetadata(importItem);
if (!extractedNgModuleMetadata) {
// Not an NgModule
return false;
}
return (0, exports.isComponentAlreadyDeclared)(componentToFind, extractedNgModuleMetadata.declarations, extractedNgModuleMetadata.imports);
});
};
exports.isComponentAlreadyDeclared = isComponentAlreadyDeclared;
const extractNgModuleMetadata = (importItem) => {
const target = importItem && importItem.ngModule ? importItem.ngModule : importItem;
const decorators = reflectionCapabilities.annotations(target);
if (!decorators || decorators.length === 0) {
return null;
}
const ngModuleDecorator = decorators.find((decorator) => decorator instanceof core_1.NgModule);
if (!ngModuleDecorator) {
return null;
}
return ngModuleDecorator;
};