Add a regex redirect.

source/redirect/base.ts

@@ -1,5 +1,5 @@
 export const matcherTypes = ['hostname', 'regex'] as const;
-export const redirectTypes = ['hostname', 'simple'] as const;
+export const redirectTypes = ['hostname', 'regex', 'simple'] as const;
 
 export type MatcherType = typeof matcherTypes[number];
 export type RedirectType = typeof redirectTypes[number];

source/redirect/exports.ts

@@ -1,9 +1,11 @@
 import {RedirectParameters} from './base.js';
 import {HostnameRedirect} from './hostname.js';
+import {RegexRedirect} from './regex.js';
 import {SimpleRedirect} from './simple.js';
 
 export * from './base.js';
 export * from './hostname.js';
+export * from './regex.js';
 export * from './simple.js';
 
 export type Redirects = HostnameRedirect | SimpleRedirect;
@@ -11,6 +13,7 @@ export type Redirects = HostnameRedirect | SimpleRedirect;
 export function parseRedirect(
   parameters: RedirectParameters,
 ): Redirects | undefined {
+  const matcherType = parameters?.matcherType;
   const redirectType = parameters?.redirectType;
 
   if (redirectType === 'hostname') {
@@ -20,4 +23,8 @@ export function parseRedirect(
   if (redirectType === 'simple') {
     return new SimpleRedirect(parameters);
   }
+
+  if (matcherType === 'regex' && redirectType === 'regex') {
+    return new RegexRedirect(parameters);
+  }
 }

source/redirect/regex.ts

@@ -0,0 +1,9 @@
+import {Redirect} from './base.js';
+
+export class RegexRedirect extends Redirect {
+  public redirect(redirect: URL | string): URL {
+    const url = redirect instanceof URL ? redirect.href : redirect;
+    const regex = new RegExp(this.parameters.matcherValue, 'gi');
+    return new URL(url.replace(regex, this.parameters.redirectValue));
+  }
+}

tests/redirect.test.ts

@@ -12,6 +12,7 @@ import {
   Redirect,
   Redirects,
   RedirectParameters,
+  RegexRedirect,
   SimpleRedirect,
 } from '../source/redirect/exports.js';
 
@@ -33,6 +34,15 @@ const simpleParameters: RedirectParameters = {
   redirectValue: 'https://example.org/simple',
 };
 
+const regexParameters: RedirectParameters = {
+  enabled: true,
+  id: 3,
+  matcherType: 'regex',
+  matcherValue: '(.+)\\.com',
+  redirectType: 'regex',
+  redirectValue: '$1.org',
+};
+
 test('parseRedirect', (t) => {
   const samples: RedirectParameters[] = [
     {
@@ -41,6 +51,7 @@ test('parseRedirect', (t) => {
     undefined as unknown as RedirectParameters,
     hostnameParameters,
     simpleParameters,
+    regexParameters,
   ];
 
   for (const sample of samples) {
@@ -58,18 +69,21 @@ test('parseRedirect', (t) => {
 test('Redirect.redirect', (t) => {
   const hostnameRedirect = new HostnameRedirect(hostnameParameters);
   const simpleRedirect = new SimpleRedirect(simpleParameters);
+  const regexRedirect = new RegexRedirect(regexParameters);
 
-  const samples: Array<[string, Redirect]> = [
+  const samples: Array<[string | URL, Redirect]> = [
     ['https://example.com', hostnameRedirect],
     ['https://example.com/path#hash?query=test', hostnameRedirect],
     ['https://example.com', simpleRedirect],
     ['https://example.com/path', simpleRedirect],
+    ['https://example.com', regexRedirect],
+    [new URL('https://example.com'), regexRedirect],
   ];
 
   for (const [index, [url, redirect]] of samples.entries()) {
     t.snapshot(
       {
-        original: url,
+        original: url instanceof URL ? url.href : url,
         redirected: redirect.redirect(url).href,
       },
       `${index} ${redirect.constructor.name}`,

tests/snapshots/tests/redirect.test.ts.md

@@ -32,6 +32,19 @@ Generated by [AVA](https://avajs.dev).
       },
     }
 
+> Class RegexRedirect
+
+    RegexRedirect {
+      parameters: {
+        enabled: true,
+        id: 3,
+        matcherType: 'regex',
+        matcherValue: '(.+)\\.com',
+        redirectType: 'regex',
+        redirectValue: '$1.org',
+      },
+    }
+
 ## Redirect.redirect
 
 > 0 HostnameRedirect
@@ -61,3 +74,17 @@ Generated by [AVA](https://avajs.dev).
       original: 'https://example.com/path',
       redirected: 'https://example.org/simple',
     }
+
+> 4 RegexRedirect
+
+    {
+      original: 'https://example.com',
+      redirected: 'https://example.org/',
+    }
+
+> 5 RegexRedirect
+
+    {
+      original: 'https://example.com/',
+      redirected: 'https://example.org/',
+    }