56 lines
1.5 KiB
TypeScript
56 lines
1.5 KiB
TypeScript
import {customAlphabet} from 'nanoid';
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export const matcherTypes = ['hostname', 'regex'] as const;
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export const redirectTypes = ['hostname', 'simple'] as const;
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export type MatcherType = typeof matcherTypes[number];
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export type RedirectType = typeof redirectTypes[number];
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export function narrowMatcherType(value: string): value is MatcherType {
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return matcherTypes.includes(value as MatcherType);
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}
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export function narrowRedirectType(value: string): value is RedirectType {
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return redirectTypes.includes(value as RedirectType);
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}
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export type RedirectParameters = {
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enabled: boolean;
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matcherType: MatcherType;
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matcherValue: string;
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redirectType: RedirectType;
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redirectValue: string;
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};
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export abstract class Redirect {
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public static generateId(): string {
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const alphabet = 'abcdefghijklmnopqrstuvwxyz';
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const nanoid = customAlphabet(`${alphabet}${alphabet.toUpperCase()}`, 20);
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return nanoid();
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}
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public id: string;
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constructor(public parameters: RedirectParameters, id?: string) {
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this.id = id ?? Redirect.generateId();
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}
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public isMatch(url: URL): boolean {
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if (this.parameters.matcherType === 'hostname') {
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const hostname = url.hostname.startsWith('www.')
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? url.hostname.slice(4)
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: url.hostname;
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return hostname === this.parameters.matcherValue;
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}
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if (this.parameters.matcherType === 'regex') {
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const regex = new RegExp(this.parameters.matcherValue, 'gi');
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return regex.test(url.href);
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}
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return false;
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}
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public abstract redirect(url: URL | string): URL;
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}
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