next/dist/esm/build/normalize-catchall-routes.js

The React Framework

import { isInterceptionRouteAppPath } from '../shared/lib/router/utils/interception-routes';
import { AppPathnameNormalizer } from '../server/normalizers/built/app/app-pathname-normalizer';
/**
 * This function will transform the appPaths in order to support catch-all routes and parallel routes.
 * It will traverse the appPaths, looking for catch-all routes and try to find parallel routes that could match
 * the catch-all. If it finds a match, it will add the catch-all to the parallel route's list of possible routes.
 *
 * @param appPaths The appPaths to transform
 */ export function normalizeCatchAllRoutes(appPaths, normalizer = new AppPathnameNormalizer()) {
    const catchAllRoutes = [
        ...new Set(Object.values(appPaths).flat().filter(isCatchAllRoute)// Sorting is important because we want to match the most specific path.
        .sort((a, b)=>b.split('/').length - a.split('/').length))
    ];
    // interception routes should only be matched by a single entrypoint
    // we don't want to push a catch-all route to an interception route
    // because it would mean the interception would be handled by the wrong page component
    const filteredAppPaths = Object.keys(appPaths).filter((route)=>!isInterceptionRouteAppPath(route));
    for (const appPath of filteredAppPaths){
        for (const catchAllRoute of catchAllRoutes){
            const normalizedCatchAllRoute = normalizer.normalize(catchAllRoute);
            const normalizedCatchAllRouteBasePath = normalizedCatchAllRoute.slice(0, normalizedCatchAllRoute.search(catchAllRouteRegex));
            if (// check if the appPath could match the catch-all
            appPath.startsWith(normalizedCatchAllRouteBasePath) && // check if there's not already a slot value that could match the catch-all
            !appPaths[appPath].some((path)=>hasMatchedSlots(path, catchAllRoute))) {
                // optional catch-all routes are not currently supported, but leaving this logic in place
                // for when they are eventually supported.
                if (isOptionalCatchAll(catchAllRoute)) {
                    // optional catch-all routes should match both the root segment and any segment after it
                    // for example, `/[[...slug]]` should match `/` and `/foo` and `/foo/bar`
                    appPaths[appPath].push(catchAllRoute);
                } else if (isCatchAll(catchAllRoute)) {
                    // regular catch-all (single bracket) should only match segments after it
                    // for example, `/[...slug]` should match `/foo` and `/foo/bar` but not `/`
                    if (normalizedCatchAllRouteBasePath !== appPath) {
                        appPaths[appPath].push(catchAllRoute);
                    }
                }
            }
        }
    }
}
function hasMatchedSlots(path1, path2) {
    const slots1 = path1.split('/').filter(isMatchableSlot);
    const slots2 = path2.split('/').filter(isMatchableSlot);
    // if the catch-all route does not have the same number of slots as the app path, it can't match
    if (slots1.length !== slots2.length) return false;
    // compare the slots in both paths. For there to be a match, each slot must be the same
    for(let i = 0; i < slots1.length; i++){
        if (slots1[i] !== slots2[i]) return false;
    }
    return true;
}
/**
 * Returns true for slots that should be considered when checking for match compatibility.
 * Excludes children slots because these are similar to having a segment-level `page`
 * which would cause a slot length mismatch when comparing it to a catch-all route.
 */ function isMatchableSlot(segment) {
    return segment.startsWith('@') && segment !== '@children';
}
const catchAllRouteRegex = /\[?\[\.\.\./;
function isCatchAllRoute(pathname) {
    // Optional catch-all slots are not currently supported, and as such they are not considered when checking for match compatability.
    return !isOptionalCatchAll(pathname) && isCatchAll(pathname);
}
function isOptionalCatchAll(pathname) {
    return pathname.includes('[[...');
}
function isCatchAll(pathname) {
    return pathname.includes('[...');
}

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