From 263c0497f30b9014f54ac6a04dca8e5bba77844c Mon Sep 17 00:00:00 2001
From: Bauke <me@bauke.xyz>
Date: Fri, 14 Oct 2022 18:15:04 +0200
Subject: [PATCH] Add the background script.

---
 source/background-scripts/initialize.ts | 36 +++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 source/background-scripts/initialize.ts

diff --git a/source/background-scripts/initialize.ts b/source/background-scripts/initialize.ts
new file mode 100644
index 0000000..4985ed1
--- /dev/null
+++ b/source/background-scripts/initialize.ts
@@ -0,0 +1,36 @@
+import browser from 'webextension-polyfill';
+
+import {parseRedirect} from '../redirect/exports.js';
+
+async function browserActionClicked() {
+  await browser.runtime.openOptionsPage();
+}
+
+if (import.meta.env.VITE_BROWSER === 'chromium') {
+  browser.action.onClicked.addListener(browserActionClicked);
+} else {
+  browser.browserAction.onClicked.addListener(browserActionClicked);
+}
+
+browser.runtime.onInstalled.addListener(async () => {
+  if (import.meta.env.DEV) {
+    await browser.runtime.openOptionsPage();
+  }
+});
+
+browser.webNavigation.onBeforeNavigate.addListener(async (details) => {
+  const url = new URL(details.url);
+
+  for (const parameters of Object.values(await browser.storage.local.get())) {
+    const redirect = parseRedirect(parameters);
+    if (redirect === undefined) {
+      continue;
+    }
+
+    if (redirect.isMatch(url)) {
+      const redirectedUrl = redirect.redirect(url);
+      await browser.tabs.update({url: redirectedUrl.href});
+      break;
+    }
+  }
+});