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import type { Group } from './route-regex'
import { DecodeError } from '../../utils'
import type { Params } from '../../../../server/request/params'
import { safeRouteMatcher } from './route-match-utils'
export interface RouteMatchFn {
(pathname: string): false | Params
}
type RouteMatcherOptions = {
// We only use the exec method of the RegExp object. This helps us avoid using
// type assertions that the passed in properties are of the correct type.
re: Pick<RegExp, 'exec'>
groups: Record<string, Group>
}
export function getRouteMatcher({
re,
groups,
}: RouteMatcherOptions): RouteMatchFn {
const rawMatcher = (pathname: string) => {
const routeMatch = re.exec(pathname)
if (!routeMatch) return false
const decode = (param: string) => {
try {
return decodeURIComponent(param)
} catch {
throw new DecodeError('failed to decode param')
}
}
const params: Params = {}
for (const [key, group] of Object.entries(groups)) {
const match = routeMatch[group.pos]
if (match !== undefined) {
if (group.repeat) {
params[key] = match.split('/').map((entry) => decode(entry))
} else {
params[key] = decode(match)
}
}
}
return params
}
// Wrap with safe matcher to handle parameter cleaning
return safeRouteMatcher(rawMatcher)
}
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