securityos/node_modules/next/dist/esm/server/app-render/walk-tree-with-flight-router-state.js

import React from "react";
import { canSegmentBeOverridden, matchSegment } from "../../client/components/match-segments";
import { getCssInlinedLinkTags } from "./get-css-inlined-link-tags";
import { getPreloadableFonts } from "./get-preloadable-fonts";
import { addSearchParamsIfPageSegment, createFlightRouterStateFromLoaderTree } from "./create-flight-router-state-from-loader-tree";
import { parseLoaderTree } from "./parse-loader-tree";
import { getLayerAssets } from "./get-layer-assets";
import { hasLoadingComponentInTree } from "./has-loading-component-in-tree";
import { createComponentTree } from "./create-component-tree";
/**
 * Use router state to decide at what common layout to render the page.
 * This can either be the common layout between two pages or a specific place to start rendering from using the "refetch" marker in the tree.
 */ export async function walkTreeWithFlightRouterState({ createSegmentPath, loaderTreeToFilter, parentParams, isFirst, flightRouterState, parentRendered, rscPayloadHead, injectedCSS, injectedFontPreloadTags, rootLayoutIncluded, asNotFound, metadataOutlet, ctx }) {
    const { renderOpts: { nextFontManifest }, query, isPrefetch, getDynamicParamFromSegment, componentMod: { tree: loaderTree } } = ctx;
    const [segment, parallelRoutes, components] = loaderTreeToFilter;
    const parallelRoutesKeys = Object.keys(parallelRoutes);
    const { layout } = components;
    const isLayout = typeof layout !== "undefined";
    /**
   * Checks if the current segment is a root layout.
   */ const rootLayoutAtThisLevel = isLayout && !rootLayoutIncluded;
    /**
   * Checks if the current segment or any level above it has a root layout.
   */ const rootLayoutIncludedAtThisLevelOrAbove = rootLayoutIncluded || rootLayoutAtThisLevel;
    // Because this function walks to a deeper point in the tree to start rendering we have to track the dynamic parameters up to the point where rendering starts
    const segmentParam = getDynamicParamFromSegment(segment);
    const currentParams = // Handle null case where dynamic param is optional
    segmentParam && segmentParam.value !== null ? {
        ...parentParams,
        [segmentParam.param]: segmentParam.value
    } : parentParams;
    const actualSegment = addSearchParamsIfPageSegment(segmentParam ? segmentParam.treeSegment : segment, query);
    /**
   * Decide if the current segment is where rendering has to start.
   */ const renderComponentsOnThisLevel = // No further router state available
    !flightRouterState || // Segment in router state does not match current segment
    !matchSegment(actualSegment, flightRouterState[0]) || // Last item in the tree
    parallelRoutesKeys.length === 0 || // Explicit refresh
    flightRouterState[3] === "refetch";
    const shouldSkipComponentTree = isPrefetch && !Boolean(components.loading) && (flightRouterState || // If there is no flightRouterState, we need to check the entire loader tree, as otherwise we'll be only checking the root
    !hasLoadingComponentInTree(loaderTree));
    if (!parentRendered && renderComponentsOnThisLevel) {
        const overriddenSegment = flightRouterState && canSegmentBeOverridden(actualSegment, flightRouterState[0]) ? flightRouterState[0] : null;
        return [
            [
                overriddenSegment ?? actualSegment,
                createFlightRouterStateFromLoaderTree(// Create router state using the slice of the loaderTree
                loaderTreeToFilter, getDynamicParamFromSegment, query),
                shouldSkipComponentTree ? null : // @ts-expect-error TODO-APP: fix async component type
                /*#__PURE__*/ React.createElement(async ()=>{
                    const { Component } = await createComponentTree(// This ensures flightRouterPath is valid and filters down the tree
                    {
                        ctx,
                        createSegmentPath,
                        loaderTree: loaderTreeToFilter,
                        parentParams: currentParams,
                        firstItem: isFirst,
                        injectedCSS,
                        injectedFontPreloadTags,
                        // This is intentionally not "rootLayoutIncludedAtThisLevelOrAbove" as createComponentTree starts at the current level and does a check for "rootLayoutAtThisLevel" too.
                        rootLayoutIncluded,
                        asNotFound,
                        metadataOutlet
                    });
                    return /*#__PURE__*/ React.createElement(Component, null);
                }),
                shouldSkipComponentTree ? null : (()=>{
                    const { layoutOrPagePath } = parseLoaderTree(loaderTreeToFilter);
                    const styles = getLayerAssets({
                        ctx,
                        layoutOrPagePath,
                        injectedCSS: new Set(injectedCSS),
                        injectedFontPreloadTags: new Set(injectedFontPreloadTags)
                    });
                    return /*#__PURE__*/ React.createElement(React.Fragment, null, styles, rscPayloadHead);
                })()
            ]
        ];
    }
    // If we are not rendering on this level we need to check if the current
    // segment has a layout. If so, we need to track all the used CSS to make
    // the result consistent.
    const layoutPath = layout == null ? void 0 : layout[1];
    const injectedCSSWithCurrentLayout = new Set(injectedCSS);
    const injectedFontPreloadTagsWithCurrentLayout = new Set(injectedFontPreloadTags);
    if (layoutPath) {
        getCssInlinedLinkTags(ctx.clientReferenceManifest, layoutPath, injectedCSSWithCurrentLayout, true);
        getPreloadableFonts(nextFontManifest, layoutPath, injectedFontPreloadTagsWithCurrentLayout);
    }
    // Walk through all parallel routes.
    const paths = (await Promise.all(parallelRoutesKeys.map(async (parallelRouteKey)=>{
        // for (const parallelRouteKey of parallelRoutesKeys) {
        const parallelRoute = parallelRoutes[parallelRouteKey];
        const currentSegmentPath = isFirst ? [
            parallelRouteKey
        ] : [
            actualSegment,
            parallelRouteKey
        ];
        const path = await walkTreeWithFlightRouterState({
            ctx,
            createSegmentPath: (child)=>{
                return createSegmentPath([
                    ...currentSegmentPath,
                    ...child
                ]);
            },
            loaderTreeToFilter: parallelRoute,
            parentParams: currentParams,
            flightRouterState: flightRouterState && flightRouterState[1][parallelRouteKey],
            parentRendered: parentRendered || renderComponentsOnThisLevel,
            isFirst: false,
            rscPayloadHead,
            injectedCSS: injectedCSSWithCurrentLayout,
            injectedFontPreloadTags: injectedFontPreloadTagsWithCurrentLayout,
            rootLayoutIncluded: rootLayoutIncludedAtThisLevelOrAbove,
            asNotFound,
            metadataOutlet
        });
        return path.map((item)=>{
            // we don't need to send over default routes in the flight data
            // because they are always ignored by the client, unless it's a refetch
            if (item[0] === "__DEFAULT__" && flightRouterState && !!flightRouterState[1][parallelRouteKey][0] && flightRouterState[1][parallelRouteKey][3] !== "refetch") {
                return null;
            }
            return [
                actualSegment,
                parallelRouteKey,
                ...item
            ];
        }).filter(Boolean);
    }))).flat();
    return paths;
}

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