@tanstack/router-core
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Modern and scalable routing for React applications
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{"version":3,"file":"new-process-route-tree.cjs","names":[],"sources":["../../src/new-process-route-tree.ts"],"sourcesContent":["import invariant from 'tiny-invariant'\nimport { createLRUCache } from './lru-cache'\nimport { last } from './utils'\nimport type { LRUCache } from './lru-cache'\n\nexport const SEGMENT_TYPE_PATHNAME = 0\nexport const SEGMENT_TYPE_PARAM = 1\nexport const SEGMENT_TYPE_WILDCARD = 2\nexport const SEGMENT_TYPE_OPTIONAL_PARAM = 3\nconst SEGMENT_TYPE_INDEX = 4\nconst SEGMENT_TYPE_PATHLESS = 5 // only used in matching to represent pathless routes that need to carry more information\n\n/**\n * All the kinds of segments that can be present in a route path.\n */\nexport type SegmentKind =\n | typeof SEGMENT_TYPE_PATHNAME\n | typeof SEGMENT_TYPE_PARAM\n | typeof SEGMENT_TYPE_WILDCARD\n | typeof SEGMENT_TYPE_OPTIONAL_PARAM\n\n/**\n * All the kinds of segments that can be present in the segment tree.\n */\ntype ExtendedSegmentKind =\n | SegmentKind\n | typeof SEGMENT_TYPE_INDEX\n | typeof SEGMENT_TYPE_PATHLESS\n\nfunction getOpenAndCloseBraces(\n part: string,\n): [openBrace: number, closeBrace: number] | null {\n const openBrace = part.indexOf('{')\n if (openBrace === -1) return null\n const closeBrace = part.indexOf('}', openBrace)\n if (closeBrace === -1) return null\n const afterOpen = openBrace + 1\n if (afterOpen >= part.length) return null\n return [openBrace, closeBrace]\n}\n\ntype ParsedSegment = Uint16Array & {\n /** segment type (0 = pathname, 1 = param, 2 = wildcard, 3 = optional param) */\n 0: SegmentKind\n /** index of the end of the prefix */\n 1: number\n /** index of the start of the value */\n 2: number\n /** index of the end of the value */\n 3: number\n /** index of the start of the suffix */\n 4: number\n /** index of the end of the segment */\n 5: number\n}\n\n/**\n * Populates the `output` array with the parsed representation of the given `segment` string.\n *\n * Usage:\n * ```ts\n * let output\n * let cursor = 0\n * while (cursor < path.length) {\n * output = parseSegment(path, cursor, output)\n * const end = output[5]\n * cursor = end + 1\n * ```\n *\n * `output` is stored outside to avoid allocations during repeated calls. It doesn't need to be typed\n * or initialized, it will be done automatically.\n */\nexport function parseSegment(\n /** The full path string containing the segment. */\n path: string,\n /** The starting index of the segment within the path. */\n start: number,\n /** A Uint16Array (length: 6) to populate with the parsed segment data. */\n output: Uint16Array = new Uint16Array(6),\n): ParsedSegment {\n const next = path.indexOf('/', start)\n const end = next === -1 ? path.length : next\n const part = path.substring(start, end)\n\n if (!part || !part.includes('$')) {\n // early escape for static pathname\n output[0] = SEGMENT_TYPE_PATHNAME\n output[1] = start\n output[2] = start\n output[3] = end\n output[4] = end\n output[5] = end\n return output as ParsedSegment\n }\n\n // $ (wildcard)\n if (part === '$') {\n const total = path.length\n output[0] = SEGMENT_TYPE_WILDCARD\n output[1] = start\n output[2] = start\n output[3] = total\n output[4] = total\n output[5] = total\n return output as ParsedSegment\n }\n\n // $paramName\n if (part.charCodeAt(0) === 36) {\n output[0] = SEGMENT_TYPE_PARAM\n output[1] = start\n output[2] = start + 1 // skip '$'\n output[3] = end\n output[4] = end\n output[5] = end\n return output as ParsedSegment\n }\n\n const braces = getOpenAndCloseBraces(part)\n if (braces) {\n const [openBrace, closeBrace] = braces\n const firstChar = part.charCodeAt(openBrace + 1)\n\n // Check for {-$...} (optional param)\n // prefix{-$paramName}suffix\n // /^([^{]*)\\{-\\$([a-zA-Z_$][a-zA-Z0-9_$]*)\\}([^}]*)$/\n if (firstChar === 45) {\n // '-'\n if (\n openBrace + 2 < part.length &&\n part.charCodeAt(openBrace + 2) === 36 // '$'\n ) {\n const paramStart = openBrace + 3\n const paramEnd = closeBrace\n // Validate param name exists\n if (paramStart < paramEnd) {\n output[0] = SEGMENT_TYPE_OPTIONAL_PARAM\n output[1] = start + openBrace\n output[2] = start + paramStart\n output[3] = start + paramEnd\n output[4] = start + closeBrace + 1\n output[5] = end\n return output as ParsedSegment\n }\n }\n } else if (firstChar === 36) {\n // '$'\n const dollarPos = openBrace + 1\n const afterDollar = openBrace + 2\n // Check for {$} (wildcard)\n if (afterDollar === closeBrace) {\n // For wildcard, value should be '$' (from dollarPos to afterDollar)\n // prefix{$}suffix\n // /^([^{]*)\\{\\$\\}([^}]*)$/\n output[0] = SEGMENT_TYPE_WILDCARD\n output[1] = start + openBrace\n output[2] = start + dollarPos\n output[3] = start + afterDollar\n output[4] = start + closeBrace + 1\n output[5] = path.length\n return output as ParsedSegment\n }\n // Regular param {$paramName} - value is the param name (after $)\n // prefix{$paramName}suffix\n // /^([^{]*)\\{\\$([a-zA-Z_$][a-zA-Z0-9_$]*)\\}([^}]*)$/\n output[0] = SEGMENT_TYPE_PARAM\n output[1] = start + openBrace\n output[2] = start + afterDollar\n output[3] = start + closeBrace\n output[4] = start + closeBrace + 1\n output[5] = end\n return output as ParsedSegment\n }\n }\n\n // fallback to static pathname (should never happen)\n output[0] = SEGMENT_TYPE_PATHNAME\n output[1] = start\n output[2] = start\n output[3] = end\n output[4] = end\n output[5] = end\n return output as ParsedSegment\n}\n\n/**\n * Recursively parses the segments of the given route tree and populates a segment trie.\n *\n * @param data A reusable Uint16Array for parsing segments. (non important, we're just avoiding allocations)\n * @param route The current route to parse.\n * @param start The starting index for parsing within the route's full path.\n * @param node The current segment node in the trie to populate.\n * @param onRoute Callback invoked for each route processed.\n */\nfunction parseSegments<TRouteLike extends RouteLike>(\n defaultCaseSensitive: boolean,\n data: Uint16Array,\n route: TRouteLike,\n start: number,\n node: AnySegmentNode<TRouteLike>,\n depth: number,\n onRoute?: (route: TRouteLike) => void,\n) {\n onRoute?.(route)\n let cursor = start\n {\n const path = route.fullPath ?? route.from\n const length = path.length\n const caseSensitive = route.options?.caseSensitive ?? defaultCaseSensitive\n const skipOnParamError = !!(\n route.options?.params?.parse &&\n route.options?.skipRouteOnParseError?.params\n )\n while (cursor < length) {\n const segment = parseSegment(path, cursor, data)\n let nextNode: AnySegmentNode<TRouteLike>\n const start = cursor\n const end = segment[5]\n cursor = end + 1\n depth++\n const kind = segment[0]\n switch (kind) {\n case SEGMENT_TYPE_PATHNAME: {\n const value = path.substring(segment[2], segment[3])\n if (caseSensitive) {\n const existingNode = node.static?.get(value)\n if (existingNode) {\n nextNode = existingNode\n } else {\n node.static ??= new Map()\n const next = createStaticNode<TRouteLike>(\n route.fullPath ?? route.from,\n )\n next.parent = node\n next.depth = depth\n nextNode = next\n node.static.set(value, next)\n }\n } else {\n const name = value.toLowerCase()\n const existingNode = node.staticInsensitive?.get(name)\n if (existingNode) {\n nextNode = existingNode\n } else {\n node.staticInsensitive ??= new Map()\n const next = createStaticNode<TRouteLike>(\n route.fullPath ?? route.from,\n )\n next.parent = node\n next.depth = depth\n nextNode = next\n node.staticInsensitive.set(name, next)\n }\n }\n break\n }\n case SEGMENT_TYPE_PARAM: {\n const prefix_raw = path.substring(start, segment[1])\n const suffix_raw = path.substring(segment[4], end)\n const actuallyCaseSensitive =\n caseSensitive && !!(prefix_raw || suffix_raw)\n const prefix = !prefix_raw\n ? undefined\n : actuallyCaseSensitive\n ? prefix_raw\n : prefix_raw.toLowerCase()\n const suffix = !suffix_raw\n ? undefined\n : actuallyCaseSensitive\n ? suffix_raw\n : suffix_raw.toLowerCase()\n const existingNode =\n !skipOnParamError &&\n node.dynamic?.find(\n (s) =>\n !s.skipOnParamError &&\n s.caseSensitive === actuallyCaseSensitive &&\n s.prefix === prefix &&\n s.suffix === suffix,\n )\n if (existingNode) {\n nextNode = existingNode\n } else {\n const next = createDynamicNode<TRouteLike>(\n SEGMENT_TYPE_PARAM,\n route.fullPath ?? route.from,\n actuallyCaseSensitive,\n prefix,\n suffix,\n )\n nextNode = next\n next.depth = depth\n next.parent = node\n node.dynamic ??= []\n node.dynamic.push(next)\n }\n break\n }\n case SEGMENT_TYPE_OPTIONAL_PARAM: {\n const prefix_raw = path.substring(start, segment[1])\n const suffix_raw = path.substring(segment[4], end)\n const actuallyCaseSensitive =\n caseSensitive && !!(prefix_raw || suffix_raw)\n const prefix = !prefix_raw\n ? undefined\n : actuallyCaseSensitive\n ? prefix_raw\n : prefix_raw.toLowerCase()\n const suffix = !suffix_raw\n ? undefined\n : actuallyCaseSensitive\n ? suffix_raw\n : suffix_raw.toLowerCase()\n const existingNode =\n !skipOnParamError &&\n node.optional?.find(\n (s) =>\n !s.skipOnParamError &&\n s.caseSensitive === actuallyCaseSensitive &&\n s.prefix === prefix &&\n s.suffix === suffix,\n )\n if (existingNode) {\n nextNode = existingNode\n } else {\n const next = createDynamicNode<TRouteLike>(\n SEGMENT_TYPE_OPTIONAL_PARAM,\n route.fullPath ?? route.from,\n actuallyCaseSensitive,\n prefix,\n suffix,\n )\n nextNode = next\n next.parent = node\n next.depth = depth\n node.optional ??= []\n node.optional.push(next)\n }\n break\n }\n case SEGMENT_TYPE_WILDCARD: {\n const prefix_raw = path.substring(start, segment[1])\n const suffix_raw = path.substring(segment[4], end)\n const actuallyCaseSensitive =\n caseSensitive && !!(prefix_raw || suffix_raw)\n const prefix = !prefix_raw\n ? undefined\n : actuallyCaseSensitive\n ? prefix_raw\n : prefix_raw.toLowerCase()\n const suffix = !suffix_raw\n ? undefined\n : actuallyCaseSensitive\n ? suffix_raw\n : suffix_raw.toLowerCase()\n const next = createDynamicNode<TRouteLike>(\n SEGMENT_TYPE_WILDCARD,\n route.fullPath ?? route.from,\n actuallyCaseSensitive,\n prefix,\n suffix,\n )\n nextNode = next\n next.parent = node\n next.depth = depth\n node.wildcard ??= []\n node.wildcard.push(next)\n }\n }\n node = nextNode\n }\n\n // create pathless node\n if (\n skipOnParamError &&\n route.children &&\n !route.isRoot &&\n route.id &&\n route.id.charCodeAt(route.id.lastIndexOf('/') + 1) === 95 /* '_' */\n ) {\n const pathlessNode = createStaticNode<TRouteLike>(\n route.fullPath ?? route.from,\n )\n pathlessNode.kind = SEGMENT_TYPE_PATHLESS\n pathlessNode.parent = node\n depth++\n pathlessNode.depth = depth\n node.pathless ??= []\n node.pathless.push(pathlessNode)\n node = pathlessNode\n }\n\n const isLeaf = (route.path || !route.children) && !route.isRoot\n // create index node\n if (isLeaf && path.endsWith('/')) {\n const indexNode = createStaticNode<TRouteLike>(\n route.fullPath ?? route.from,\n )\n indexNode.kind = SEGMENT_TYPE_INDEX\n indexNode.parent = node\n depth++\n indexNode.depth = depth\n node.index = indexNode\n node = indexNode\n }\n\n node.parse = route.options?.params?.parse ?? null\n node.skipOnParamError = skipOnParamError\n node.parsingPriority = route.options?.skipRouteOnParseError?.priority ?? 0\n\n // make node \"matchable\"\n if (isLeaf && !node.route) {\n node.route = route\n node.fullPath = route.fullPath ?? route.from\n }\n }\n if (route.children)\n for (const child of route.children) {\n parseSegments(\n defaultCaseSensitive,\n data,\n child as TRouteLike,\n cursor,\n node,\n depth,\n onRoute,\n )\n }\n}\n\nfunction sortDynamic(\n a: {\n prefix?: string\n suffix?: string\n caseSensitive: boolean\n skipOnParamError: boolean\n parsingPriority: number\n },\n b: {\n prefix?: string\n suffix?: string\n caseSensitive: boolean\n skipOnParamError: boolean\n parsingPriority: number\n },\n) {\n if (a.skipOnParamError && !b.skipOnParamError) return -1\n if (!a.skipOnParamError && b.skipOnParamError) return 1\n if (\n a.skipOnParamError &&\n b.skipOnParamError &&\n (a.parsingPriority || b.parsingPriority)\n )\n return b.parsingPriority - a.parsingPriority\n if (a.prefix && b.prefix && a.prefix !== b.prefix) {\n if (a.prefix.startsWith(b.prefix)) return -1\n if (b.prefix.startsWith(a.prefix)) return 1\n }\n if (a.suffix && b.suffix && a.suffix !== b.suffix) {\n if (a.suffix.endsWith(b.suffix)) return -1\n if (b.suffix.endsWith(a.suffix)) return 1\n }\n if (a.prefix && !b.prefix) return -1\n if (!a.prefix && b.prefix) return 1\n if (a.suffix && !b.suffix) return -1\n if (!a.suffix && b.suffix) return 1\n if (a.caseSensitive && !b.caseSensitive) return -1\n if (!a.caseSensitive && b.caseSensitive) return 1\n\n // we don't need a tiebreaker here\n // at this point the 2 nodes cannot conflict during matching\n return 0\n}\n\nfunction sortTreeNodes(node: SegmentNode<RouteLike>) {\n if (node.pathless) {\n for (const child of node.pathless) {\n sortTreeNodes(child)\n }\n }\n if (node.static) {\n for (const child of node.static.values()) {\n sortTreeNodes(child)\n }\n }\n if (node.staticInsensitive) {\n for (const child of node.staticInsensitive.values()) {\n sortTreeNodes(child)\n }\n }\n if (node.dynamic?.length) {\n node.dynamic.sort(sortDynamic)\n for (const child of node.dynamic) {\n sortTreeNodes(child)\n }\n }\n if (node.optional?.length) {\n node.optional.sort(sortDynamic)\n for (const child of node.optional) {\n sortTreeNodes(child)\n }\n }\n if (node.wildcard?.length) {\n node.wildcard.sort(sortDynamic)\n for (const child of node.wildcard) {\n sortTreeNodes(child)\n }\n }\n}\n\nfunction createStaticNode<T extends RouteLike>(\n fullPath: string,\n): StaticSegmentNode<T> {\n return {\n kind: SEGMENT_TYPE_PATHNAME,\n depth: 0,\n pathless: null,\n index: null,\n static: null,\n staticInsensitive: null,\n dynamic: null,\n optional: null,\n wildcard: null,\n route: null,\n fullPath,\n parent: null,\n parse: null,\n skipOnParamError: false,\n parsingPriority: 0,\n }\n}\n\n/**\n * Keys must be declared in the same order as in `SegmentNode` type,\n * to ensure they are represented as the same object class in the engine.\n */\nfunction createDynamicNode<T extends RouteLike>(\n kind:\n | typeof SEGMENT_TYPE_PARAM\n | typeof SEGMENT_TYPE_WILDCARD\n | typeof SEGMENT_TYPE_OPTIONAL_PARAM,\n fullPath: string,\n caseSensitive: boolean,\n prefix?: string,\n suffix?: string,\n): DynamicSegmentNode<T> {\n return {\n kind,\n depth: 0,\n pathless: null,\n index: null,\n static: null,\n staticInsensitive: null,\n dynamic: null,\n optional: null,\n wildcard: null,\n route: null,\n fullPath,\n parent: null,\n parse: null,\n skipOnParamError: false,\n parsingPriority: 0,\n caseSensitive,\n prefix,\n suffix,\n }\n}\n\ntype StaticSegmentNode<T extends RouteLike> = SegmentNode<T> & {\n kind:\n | typeof SEGMENT_TYPE_PATHNAME\n | typeof SEGMENT_TYPE_PATHLESS\n | typeof SEGMENT_TYPE_INDEX\n}\n\ntype DynamicSegmentNode<T extends RouteLike> = SegmentNode<T> & {\n kind:\n | typeof SEGMENT_TYPE_PARAM\n | typeof SEGMENT_TYPE_WILDCARD\n | typeof SEGMENT_TYPE_OPTIONAL_PARAM\n prefix?: string\n suffix?: string\n caseSensitive: boolean\n}\n\ntype AnySegmentNode<T extends RouteLike> =\n | StaticSegmentNode<T>\n | DynamicSegmentNode<T>\n\ntype SegmentNode<T extends RouteLike> = {\n kind: ExtendedSegmentKind\n\n pathless: Array<StaticSegmentNode<T>> | null\n\n /** Exact index segment (highest priority) */\n index: StaticSegmentNode<T> | null\n\n /** Static segments (2nd priority) */\n static: Map<string, StaticSegmentNode<T>> | null\n\n /** Case insensitive static segments (3rd highest priority) */\n staticInsensitive: Map<string, StaticSegmentNode<T>> | null\n\n /** Dynamic segments ($param) */\n dynamic: Array<DynamicSegmentNode<T>> | null\n\n /** Optional dynamic segments ({-$param}) */\n optional: Array<DynamicSegmentNode<T>> | null\n\n /** Wildcard segments ($ - lowest priority) */\n wildcard: Array<DynamicSegmentNode<T>> | null\n\n /** Terminal route (if this path can end here) */\n route: T | null\n\n /** The full path for this segment node (will only be valid on leaf nodes) */\n fullPath: string\n\n parent: AnySegmentNode<T> | null\n\n depth: number\n\n /** route.options.params.parse function, set on the last node of the route */\n parse: null | ((params: Record<string, string>) => any)\n\n /** options.skipRouteOnParseError.params ?? false */\n skipOnParamError: boolean\n\n /** options.skipRouteOnParseError.priority ?? 0 */\n parsingPriority: number\n}\n\ntype RouteLike = {\n id?: string\n path?: string // relative path from the parent,\n children?: Array<RouteLike> // child routes,\n parentRoute?: RouteLike // parent route,\n isRoot?: boolean\n options?: {\n skipRouteOnParseError?: {\n params?: boolean\n priority?: number\n }\n caseSensitive?: boolean\n params?: {\n parse?: (params: Record<string, string>) => any\n }\n }\n} &\n // router tree\n (| { fullPath: string; from?: never } // full path from the root\n // flat route masks list\n | { fullPath?: never; from: string } // full path from the root\n )\n\nexport type ProcessedTree<\n TTree extends Extract<RouteLike, { fullPath: string }>,\n TFlat extends Extract<RouteLike, { from: string }>,\n TSingle extends Extract<RouteLike, { from: string }>,\n> = {\n /** a representation of the `routeTree` as a segment tree */\n segmentTree: AnySegmentNode<TTree>\n /** a mini route tree generated from the flat `routeMasks` list */\n masksTree: AnySegmentNode<TFlat> | null\n /** @deprecated keep until v2 so that `router.matchRoute` can keep not caring about the actual route tree */\n singleCache: LRUCache<string, AnySegmentNode<TSingle>>\n /** a cache of route matches from the `segmentTree` */\n matchCache: LRUCache<string, RouteMatch<TTree> | null>\n /** a cache of route matches from the `masksTree` */\n flatCache: LRUCache<string, ReturnType<typeof findMatch<TFlat>>> | null\n}\n\nexport function processRouteMasks<\n TRouteLike extends Extract<RouteLike, { from: string }>,\n>(\n routeList: Array<TRouteLike>,\n processedTree: ProcessedTree<any, TRouteLike, any>,\n) {\n const segmentTree = createStaticNode<TRouteLike>('/')\n const data = new Uint16Array(6)\n for (const route of routeList) {\n parseSegments(false, data, route, 1, segmentTree, 0)\n }\n sortTreeNodes(segmentTree)\n processedTree.masksTree = segmentTree\n processedTree.flatCache = createLRUCache<\n string,\n ReturnType<typeof findMatch<TRouteLike>>\n >(1000)\n}\n\n/**\n * Take an arbitrary list of routes, create a tree from them (if it hasn't been created already), and match a path against it.\n */\nexport function findFlatMatch<T extends Extract<RouteLike, { from: string }>>(\n /** The path to match. */\n path: string,\n /** The `processedTree` returned by the initial `processRouteTree` call. */\n processedTree: ProcessedTree<any, T, any>,\n) {\n path ||= '/'\n const cached = processedTree.flatCache!.get(path)\n if (cached) return cached\n const result = findMatch(path, processedTree.masksTree!)\n processedTree.flatCache!.set(path, result)\n return result\n}\n\n/**\n * @deprecated keep until v2 so that `router.matchRoute` can keep not caring about the actual route tree\n */\nexport function findSingleMatch(\n from: string,\n caseSensitive: boolean,\n fuzzy: boolean,\n path: string,\n processedTree: ProcessedTree<any, any, { from: string }>,\n) {\n from ||= '/'\n path ||= '/'\n const key = caseSensitive ? `case\\0${from}` : from\n let tree = processedTree.singleCache.get(key)\n if (!tree) {\n // single flat routes (router.matchRoute) are not eagerly processed,\n // if we haven't seen this route before, process it now\n tree = createStaticNode<{ from: string }>('/')\n const data = new Uint16Array(6)\n parseSegments(caseSensitive, data, { from }, 1, tree, 0)\n processedTree.singleCache.set(key, tree)\n }\n return findMatch(path, tree, fuzzy)\n}\n\ntype RouteMatch<T extends Extract<RouteLike, { fullPath: string }>> = {\n route: T\n rawParams: Record<string, string>\n parsedParams?: Record<string, unknown>\n branch: ReadonlyArray<T>\n}\n\nexport function findRouteMatch<\n T extends Extract<RouteLike, { fullPath: string }>,\n>(\n /** The path to match against the route tree. */\n path: string,\n /** The `processedTree` returned by the initial `processRouteTree` call. */\n processedTree: ProcessedTree<T, any, any>,\n /** If `true`, allows fuzzy matching (partial matches), i.e. which node in the tree would have been an exact match if the `path` had been shorter? */\n fuzzy = false,\n): RouteMatch<T> | null {\n const key = fuzzy ? path : `nofuzz\\0${path}` // the main use for `findRouteMatch` is fuzzy:true, so we optimize for that case\n const cached = processedTree.matchCache.get(key)\n if (cached !== undefined) return cached\n path ||= '/'\n let result: RouteMatch<T> | null\n\n try {\n result = findMatch(\n path,\n processedTree.segmentTree,\n fuzzy,\n ) as RouteMatch<T> | null\n } catch (err) {\n if (err instanceof URIError) {\n result = null\n } else {\n throw err\n }\n }\n\n if (result) result.branch = buildRouteBranch(result.route)\n processedTree.matchCache.set(key, result)\n return result\n}\n\n/** Trim trailing slashes (except preserving root '/'). */\nexport function trimPathRight(path: string) {\n return path === '/' ? path : path.replace(/\\/{1,}$/, '')\n}\n\nexport interface ProcessRouteTreeResult<\n TRouteLike extends Extract<RouteLike, { fullPath: string }> & { id: string },\n> {\n /** Should be considered a black box, needs to be provided to all matching functions in this module. */\n processedTree: ProcessedTree<TRouteLike, any, any>\n /** A lookup map of routes by their unique IDs. */\n routesById: Record<string, TRouteLike>\n /** A lookup map of routes by their trimmed full paths. */\n routesByPath: Record<string, TRouteLike>\n}\n\n/**\n * Processes a route tree into a segment trie for efficient path matching.\n * Also builds lookup maps for routes by ID and by trimmed full path.\n */\nexport function processRouteTree<\n TRouteLike extends Extract<RouteLike, { fullPath: string }> & { id: string },\n>(\n /** The root of the route tree to process. */\n routeTree: TRouteLike,\n /** Whether matching should be case sensitive by default (overridden by individual route options). */\n caseSensitive: boolean = false,\n /** Optional callback invoked for each route during processing. */\n initRoute?: (route: TRouteLike, index: number) => void,\n): ProcessRouteTreeResult<TRouteLike> {\n const segmentTree = createStaticNode<TRouteLike>(routeTree.fullPath)\n const data = new Uint16Array(6)\n const routesById = {} as Record<string, TRouteLike>\n const routesByPath = {} as Record<string, TRouteLike>\n let index = 0\n parseSegments(caseSensitive, data, routeTree, 1, segmentTree, 0, (route) => {\n initRoute?.(route, index)\n\n invariant(\n !(route.id in routesById),\n `Duplicate routes found with id: ${String(route.id)}`,\n )\n\n routesById[route.id] = route\n\n if (index !== 0 && route.path) {\n const trimmedFullPath = trimPathRight(route.fullPath)\n if (!routesByPath[trimmedFullPath] || route.fullPath.endsWith('/')) {\n routesByPath[trimmedFullPath] = route\n }\n }\n\n index++\n })\n sortTreeNodes(segmentTree)\n const processedTree: ProcessedTree<TRouteLike, any, any> = {\n segmentTree,\n singleCache: createLRUCache<string, AnySegmentNode<any>>(1000),\n matchCache: createLRUCache<string, RouteMatch<TRouteLike> | null>(1000),\n flatCache: null,\n masksTree: null,\n }\n return {\n processedTree,\n routesById,\n routesByPath,\n }\n}\n\nfunction findMatch<T extends RouteLike>(\n path: string,\n segmentTree: AnySegmentNode<T>,\n fuzzy = false,\n): {\n route: T\n /**\n * The raw (unparsed) params extracted from the path.\n * This will be the exhaustive list of all params defined in the route's path.\n */\n rawParams: Record<string, string>\n /**\n * The accumlulated parsed params of each route in the branch that had `skipRouteOnParseError` enabled.\n * Will not contain all params defined in the route's path. Those w/ a `params.parse` but no `skipRouteOnParseError` will need to be parsed separately.\n */\n parsedParams?: Record<string, unknown>\n} | null {\n const parts = path.split('/')\n const leaf = getNodeMatch(path, parts, segmentTree, fuzzy)\n if (!leaf) return null\n const [rawParams] = extractParams(path, parts, leaf)\n return {\n route: leaf.node.route!,\n rawParams,\n parsedParams: leaf.parsedParams,\n }\n}\n\ntype ParamExtractionState = {\n part: number\n node: number\n path: number\n segment: number\n}\n\n/**\n * This function is \"resumable\":\n * - the `leaf` input can contain `extract` and `rawParams` properties from a previous `extractParams` call\n * - the returned `state` can be passed back as `extract` in a future call to continue extracting params from where we left off\n *\n * Inputs are *not* mutated.\n */\nfunction extractParams<T extends RouteLike>(\n path: string,\n parts: Array<string>,\n leaf: {\n node: AnySegmentNode<T>\n skipped: number\n extract?: ParamExtractionState\n rawParams?: Record<string, string>\n },\n): [rawParams: Record<string, string>, state: ParamExtractionState] {\n const list = buildBranch(leaf.node)\n let nodeParts: Array<string> | null = null\n const rawParams: Record<string, string> = Object.create(null)\n /** which segment of the path we're currently processing */\n let partIndex = leaf.extract?.part ?? 0\n /** which node of the route tree branch we're currently processing */\n let nodeIndex = leaf.extract?.node ?? 0\n /** index of the 1st character of the segment we're processing in the path string */\n let pathIndex = leaf.extract?.path ?? 0\n /** which fullPath segment we're currently processing */\n let segmentCount = leaf.extract?.segment ?? 0\n for (\n ;\n nodeIndex < list.length;\n partIndex++, nodeIndex++, pathIndex++, segmentCount++\n ) {\n const node = list[nodeIndex]!\n // index nodes are terminating nodes, nothing to extract, just leave\n if (node.kind === SEGMENT_TYPE_INDEX) break\n // pathless nodes do not consume a path segment\n if (node.kind === SEGMENT_TYPE_PATHLESS) {\n segmentCount--\n partIndex--\n pathIndex--\n continue\n }\n const part = parts[partIndex]\n const currentPathIndex = pathIndex\n if (part) pathIndex += part.length\n if (node.kind === SEGMENT_TYPE_PARAM) {\n nodeParts ??= leaf.node.fullPath.split('/')\n const nodePart = nodeParts[segmentCount]!\n const preLength = node.prefix?.length ?? 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0\n const sufLength = node.suffix?.length ?? 0\n const name = nodePart.substring(\n preLength + 3,\n nodePart.length - sufLength - 1,\n )\n const value =\n node.suffix || node.prefix\n ? part!.substring(preLength, part!.length - sufLength)\n : part\n if (value) rawParams[name] = decodeURIComponent(value)\n } else if (node.kind === SEGMENT_TYPE_WILDCARD) {\n const n = node\n const value = path.substring(\n currentPathIndex + (n.prefix?.length ?? 0),\n path.length - (n.suffix?.length ?? 0),\n )\n const splat = decodeURIComponent(value)\n // TODO: Deprecate *\n rawParams['*'] = splat\n rawParams._splat = splat\n break\n }\n }\n if (leaf.rawParams) Object.assign(rawParams, leaf.rawParams)\n return [\n rawParams,\n {\n part: partIndex,\n node: nodeIndex,\n path: pathIndex,\n segment: segmentCount,\n },\n ]\n}\n\nfunction buildRouteBranch<T extends RouteLike>(route: T) {\n const list = [route]\n while (route.parentRoute) {\n route = route.parentRoute as T\n list.push(route)\n }\n list.reverse()\n return list\n}\n\nfunction buildBranch<T extends RouteLike>(node: AnySegmentNode<T>) {\n const list: Array<AnySegmentNode<T>> = Array(node.depth + 1)\n do {\n list[node.depth] = node\n node = node.parent!\n } while (node)\n return list\n}\n\ntype MatchStackFrame<T extends RouteLike> = {\n node: AnySegmentNode<T>\n /** index of the segment of path */\n index: number\n /** how many nodes between `node` and the root of the segment tree */\n depth: number\n /**\n * Bitmask of skipped optional segments.\n *\n * This is a very performant way of storing an \"array of booleans\", but it means beyond 32 segments we can't track skipped optionals.\n * If we really really need to support more than 32 segments we can switch to using a `BigInt` here. It's about 2x slower in worst case scenarios.\n */\n skipped: number\n statics: number\n dynamics: number\n optionals: number\n /** intermediary state for param extraction */\n extract?: ParamExtractionState\n /** intermediary params from param extraction */\n rawParams?: Record<string, string>\n parsedParams?: Record<string, unknown>\n}\n\nfunction getNodeMatch<T extends RouteLike>(\n path: string,\n parts: Array<string>,\n segmentTree: AnySegmentNode<T>,\n fuzzy: boolean,\n) {\n // quick check for root index\n // this is an optimization, algorithm should work correctly without this block\n if (path === '/' && segmentTree.index)\n return { node: segmentTree.index, skipped: 0 } as Pick<\n Frame,\n 'node' | 'skipped' | 'parsedParams'\n >\n\n const trailingSlash = !last(parts)\n const pathIsIndex = trailingSlash && path !== '/'\n const partsLength = parts.length - (trailingSlash ? 1 : 0)\n\n type Frame = MatchStackFrame<T>\n\n // use a stack to explore all possible paths (params cause branching)\n // iterate \"backwards\" (low priority first) so that we can push() each candidate, and pop() the highest priority candidate first\n // - pros: it is depth-first, so we find full matches faster\n // - cons: we cannot short-circuit, because highest priority matches are at the end of the loop (for loop with i--) (but we have no good short-circuiting anyway)\n // other possible approaches:\n // - shift instead of pop (measure performance difference), this allows iterating \"forwards\" (effectively breadth-first)\n // - never remove from the stack, keep a cursor instead. 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