1 files changed, 91 insertions, 0 deletions
diff --git a/assets/javascript/remove-twitter-sw.js b/assets/javascript/remove-twitter-sw.js
new file mode 100644
index 00000000..222a7283
--- /dev/null
+++ b/assets/javascript/remove-twitter-sw.js
@@ -0,0 +1,91 @@
+"use strict";
+
+const nitterInstances = [
+  "https://nitter.net",
+  "https://nitter.snopyta.org",
+  "https://nitter.42l.fr",
+  "https://nitter.nixnet.services",
+  "https://nitter.13ad.de",
+  "https://nitter.pussthecat.org",
+  "https://nitter.mastodont.cat",
+  "https://nitter",
+  "https://nitter.tedomum.net",
+  "https://nitter.cattube.org",
+  "https://nitter.fdn.fr",
+  "https://nitter.1d4.us",
+  "https://nitter.kavin.rocks",
+];
+
+let disableNitter;
+let nitterInstance;
+let redirectBypassFlag;
+let exceptions;
+
+window.browser = window.browser || window.chrome;
+
+function getRandomInstance() {
+  return nitterInstances[~~(nitterInstances.length * Math.random())];
+}
+
+function isNotException(url) {
+  return !exceptions.some((regex) => regex.test(url.href));
+}
+
+function shouldRedirect(url) {
+  return (
+    !redirectBypassFlag &&
+    isNotException(url) &&
+    !disableNitter &&
+    url.host !== nitterInstance &&
+    !url.pathname.includes("/home")
+  );
+}
+
+function redirectTwitter(url) {
+  if (url.host.split(".")[0] === "pbs") {
+    return `${nitterInstance}/pic/${encodeURIComponent(url.href)}`;
+  } else if (url.host.split(".")[0] === "video") {
+    return `${nitterInstance}/gif/${encodeURIComponent(url.href)}`;
+  } else {
+    return `${nitterInstance}${url.pathname}${url.search}`;
+  }
+}
+
+browser.storage.sync.get(
+  [
+    "nitterInstance",
+    "disableNitter",
+    "removeTwitterSW",
+    "redirectBypassFlag",
+    "exceptions",
+  ],
+  (result) => {
+    redirectBypassFlag = result.redirectBypassFlag;
+    browser.storage.sync.set({
+      redirectBypassFlag: false,
+    });
+    if (!result.removeTwitterSW) {
+      disableNitter = result.disableNitter;
+      nitterInstance = result.nitterInstance || getRandomInstance();
+      exceptions = result.exceptions
+        ? result.exceptions.map((e) => {
+            return new RegExp(e);
+          })
+        : [];
+      navigator.serviceWorker.getRegistrations().then((registrations) => {
+        for (let registration of registrations) {
+          if (registration.scope === "https://twitter.com/") {
+            registration.unregister();
+            console.log("Unregistered Twitter SW", registration);
+          }
+        }
+      });
+      const url = new URL(window.location);
+      if (shouldRedirect()) {
+        const redirect = redirectTwitter(url);
+        console.info("Redirecting", `"${url.href}"`, "=>", `"${redirect}"`);
+        window.location = redirect;
+      }
+    }
+  }
+);