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import { parseLocation } from './location';
import { parsedOptions } from './options';
import type { Router } from './router';
import {
type RouteConfirmHook,
type RouteHandleHook,
type RouteHandleResult,
type RouteLayerOptions,
type RouteLocationInput,
type RouteMatchResult,
type RouteMeta,
type RouteOptions,
type RouteParsedConfig,
type RouteState,
RouteType,
type RouterParsedOptions
} from './types';
import { isNonEmptyPlainObject, isPlainObject } from './util';
/**
* Configuration for non-enumerable properties in Route class
* These properties will be hidden during object traversal and serialization
*/
export const NON_ENUMERABLE_PROPERTIES = [
// Private fields - internal implementation details
'_handled',
'_handle',
'_handleResult',
'_options',
// SSR-specific properties - meaningless in client environment
'req',
'res',
// Internal context - used by framework internally
'context',
// Status code - internal status information
'statusCode',
// Route behavior overrides - framework internal logic
'confirm',
// Layer configuration - used for layer routes
'layer'
] satisfies string[];
/**
* Append user-provided parameters to URL path
* @param match Route matching result
* @param toInput User-provided route location object
* @param base Base URL
* @param to Current parsed URL object
*/
export function applyRouteParams(
match: RouteMatchResult,
toInput: RouteLocationInput,
base: URL,
to: URL
): void {
if (
!isPlainObject(toInput) ||
!isNonEmptyPlainObject(toInput.params) ||
!match.matches.length
) {
return;
}
// Get the last matched route configuration
const lastMatch = match.matches[match.matches.length - 1];
// Split current path
const current = to.pathname.split('/');
// Compile new path with user parameters and split
const next = new URL(
lastMatch.compile(toInput.params).substring(1),
base
).pathname.split('/');
// Replace current path segments with new path segments
next.forEach((item, index) => {
current[index] = item || current[index];
});
// Update URL path
to.pathname = current.join('/');
// Merge parameters to match result, user parameters take precedence
Object.assign(match.params, toInput.params);
}
/**
* Route class provides complete route object functionality
*/
export class Route {
// Private fields for handle validation
private _handled = false;
private _handle: RouteHandleHook | null = null;
private _handleResult: RouteHandleResult | null = null;
private readonly _options: RouterParsedOptions;
// Public properties
public readonly statusCode: number | null = null;
public readonly state: RouteState;
public readonly keepScrollPosition: boolean;
/** Custom confirm handler that overrides default route-transition confirm logic */
public readonly confirm: RouteConfirmHook | null;
/** Layer configuration for layer routes */
public readonly layer: RouteLayerOptions | null;
// Read-only properties
public readonly type: RouteType;
public readonly req: IncomingMessage | null;
public readonly res: ServerResponse | null;
public readonly context: Record<string | symbol, any>;
public readonly url: URL;
public readonly path: string;
public readonly fullPath: string;
public readonly hash: string;
public readonly params: Record<string, string> = {};
public readonly query: Record<string, string | undefined> = {};
public readonly queryArray: Record<string, string[] | undefined> = {};
public readonly meta: RouteMeta;
public readonly matched: readonly RouteParsedConfig[];
public readonly config: RouteParsedConfig | null;
constructor(routeOptions: Partial<RouteOptions> = {}) {
const {
toType = RouteType.push,
toInput = '/',
from = null,
options = parsedOptions()
} = routeOptions;
this._options = options;
this.type = toType;
this.req = options.req;
this.res = options.res;
this.context = options.context;
const base = options.base;
const to = options.normalizeURL(parseLocation(toInput, base), from);
const isSameOrigin = to.origin === base.origin;
const isSameBase = to.pathname.startsWith(base.pathname);
const match =
isSameOrigin && isSameBase ? options.matcher(to, base) : null;
this.url = to;
this.path = match
? to.pathname.substring(base.pathname.length - 1)
: to.pathname;
this.fullPath = (match ? this.path : to.pathname) + to.search + to.hash;
this.matched = match ? match.matches : Object.freeze([]);
this.keepScrollPosition = isPlainObject(toInput)
? Boolean(toInput.keepScrollPosition)
: false;
this.confirm =
isPlainObject(toInput) && toInput.confirm ? toInput.confirm : null;
this.layer =
toType === RouteType.pushLayer &&
isPlainObject(toInput) &&
toInput.layer
? toInput.layer
: null;
this.config =
this.matched.length > 0
? this.matched[this.matched.length - 1]
: null;
this.meta = this.config?.meta || {};
// Initialize state object - create new local object, merge externally passed state
const state: RouteState = {};
if (isPlainObject(toInput) && toInput.state) {
Object.assign(state, toInput.state);
}
this.state = state;
// Process query parameters
for (const key of new Set(to.searchParams.keys())) {
this.query[key] = to.searchParams.get(key)!;
this.queryArray[key] = to.searchParams.getAll(key);
}
this.hash = to.hash;
// Apply user-provided route parameters (if match is successful)
if (match) {
applyRouteParams(match, toInput, base, to);
// Assign matched parameters to route object
Object.assign(this.params, match.params);
}
// Set status code
// Prioritize user-provided statusCode
if (isPlainObject(toInput) && typeof toInput.statusCode === 'number') {
this.statusCode = toInput.statusCode;
}
// If statusCode is not provided, keep default null value
// Configure property enumerability
// Set internal implementation details as non-enumerable, keep user-common properties enumerable
// Set specified properties as non-enumerable according to configuration
for (const property of NON_ENUMERABLE_PROPERTIES) {
Object.defineProperty(this, property, { enumerable: false });
}
}
get isPush(): boolean {
return this.type.startsWith('push');
}
// handle related getter/setter
get handle(): RouteHandleHook | null {
return this._handle;
}
set handle(val: RouteHandleHook | null) {
this.setHandle(val);
}
get handleResult(): RouteHandleResult | null {
return this._handleResult;
}
set handleResult(val: RouteHandleResult | null) {
this._handleResult = val;
}
/**
* Set handle function with validation logic wrapper
*/
setHandle(val: RouteHandleHook | null): void {
if (typeof val !== 'function') {
this._handle = null;
return;
}
const self = this;
this._handle = function handle(
this: Route,
to: Route,
from: Route | null,
router: Router
) {
if (self._handled) {
throw new Error(
'Route handle hook can only be called once per navigation'
);
}
self._handled = true;
return val.call(this, to, from, router);
};
}
/**
* Apply navigation-generated state to current route
* Used by route handlers to add system state like pageId
* @param navigationState Navigation-generated state to apply
*/
applyNavigationState(navigationState: Partial<RouteState>): void {
Object.assign(this.state, navigationState);
}
/**
* Sync all properties of current route to target route object
* Used for route object updates in reactive systems
* @param targetRoute Target route object
*/
syncTo(targetRoute: Route): void {
// Copy enumerable properties
Object.assign(targetRoute, this);
// Copy non-enumerable properties - type-safe property copying
for (const property of NON_ENUMERABLE_PROPERTIES) {
if (!(property in this && property in targetRoute)) continue;
// Use Reflect.set for type-safe property setting
const value = Reflect.get(this, property);
Reflect.set(targetRoute, property, value);
}
}
/**
* Clone current route instance
* Returns a new Route instance with same configuration and state
*/
clone(): Route {
// Reconstruct route object, passing current state and confirm handler
const toInput: RouteLocationInput = {
path: this.fullPath,
state: { ...this.state },
...(this.confirm && { confirm: this.confirm }),
...(this.layer && { layer: this.layer }),
...(this.statusCode !== null && { statusCode: this.statusCode })
};
// Get original options from constructor's finalOptions
const options = this._options;
const clonedRoute = new Route({
options,
toType: this.type,
toInput
});
return clonedRoute;
}
}
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