re-nav/source/redirect/base.ts

44 lines
1.2 KiB
TypeScript

export const matcherTypes = ['hostname'] as const;
export const redirectTypes = ['hostname', 'simple'] as const;
export type MatcherType = typeof matcherTypes[number];
export type RedirectType = typeof redirectTypes[number];
export function narrowMatchType(value: string): value is MatcherType {
return matcherTypes.includes(value as MatcherType);
}
export function narrowRedirectType(value: string): value is RedirectType {
return redirectTypes.includes(value as RedirectType);
}
export type Matcher = {
matcherType: MatcherType;
toMatch: string;
};
export type RedirectParameters = {
redirectType: RedirectType;
};
export abstract class Redirect<P extends RedirectParameters> {
constructor(public parameters: P & Matcher) {}
public isMatch(url: URL): boolean {
if (this.parameters.matcherType === 'hostname') {
const hostname = url.hostname.startsWith('www.')
? url.hostname.slice(4)
: url.hostname;
return hostname === this.parameters.toMatch;
}
return false;
}
public abstract redirect(url: URL | string): URL;
public abstract get redirectValue(): string;
public abstract set redirectValue(value: string);
}