@ionic/core/dist/collection/components/router/utils/parser.js

Base components for Ionic

import { parsePath } from './path';
const readProp = (el, prop) => {
  if (prop in el) {
    return el[prop];
  }
  if (el.hasAttribute(prop)) {
    return el.getAttribute(prop);
  }
  return null;
};
export const readRedirects = (root) => {
  return Array.from(root.children)
    .filter(el => el.tagName === 'ION-ROUTE-REDIRECT')
    .map(el => {
    const to = readProp(el, 'to');
    return {
      from: parsePath(readProp(el, 'from')).segments,
      to: to == null ? undefined : parsePath(to),
    };
  });
};
export const readRoutes = (root) => {
  return flattenRouterTree(readRouteNodes(root));
};
export const readRouteNodes = (node) => {
  return Array.from(node.children)
    .filter(el => el.tagName === 'ION-ROUTE' && el.component)
    .map(el => {
    const component = readProp(el, 'component');
    return {
      path: parsePath(readProp(el, 'url')).segments,
      id: component.toLowerCase(),
      params: el.componentProps,
      beforeLeave: el.beforeLeave,
      beforeEnter: el.beforeEnter,
      children: readRouteNodes(el)
    };
  });
};
export const flattenRouterTree = (nodes) => {
  const chains = [];
  for (const node of nodes) {
    flattenNode([], chains, node);
  }
  return chains;
};
const flattenNode = (chain, chains, node) => {
  chain = chain.slice();
  chain.push({
    id: node.id,
    path: node.path,
    params: node.params,
    beforeLeave: node.beforeLeave,
    beforeEnter: node.beforeEnter
  });
  if (node.children.length === 0) {
    chains.push(chain);
    return;
  }
  for (const child of node.children) {
    flattenNode(chain, chains, child);
  }
};