Add chrome extension source

README.md

@@ -1,7 +1,23 @@
 # rfd-redirect-stripper
 
-This is a [Tampermonkey](https://www.tampermonkey.net/) userscript that strips affiliate redirects from deal links posted on https://forums.redflagdeals.com.
+rfd-redirect-stripper strips affiliate redirects from deal links posted on https://forums.redflagdeals.com.
 
 ## Why?
 
-This can help prevent broken links from collisions with adblockers. I wouldn't suggest using this unless you are experiencing difficulties opening links. Affiliate links and referrals help support RedFlagDeals.com.
+This helps prevent broken links from collisions with adblockers. Only use if you are experiencing difficulties opening links. Affiliate links and referrals help support RedFlagDeals.com.
+
+## Tampermonkey Script
+
+This was originally a [Tampermonkey](https://www.tampermonkey.net/) userscript before evolving into a browser extension.
+
+Copy [script.js](./script.js) into Tampermonkey.
+
+## Chrome extension
+
+To load the browser extension, clone this repo and load [extensions/chrome](./extensions/chrome/).
+
+## Updating redirects
+
+The chrome extension will update itself by periodically fetching the latest [redirects.json](redirects.json).
+
+Open a pull request to this repo to update the redirects.

extensions/chrome/background.js

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+function updateRedirects() {
+  var URL =
+    "https://raw.githubusercontent.com/davegallant/rfd-redirect-stripper/main/redirects.json";
+
+  fetch(URL)
+    .then((res) => res.json())
+    .then((res) => {
+      chrome.storage.local.set({
+        "rfd-redirects": res,
+      });
+    });
+}
+
+chrome.runtime.onInstalled.addListener(() => {
+  updateRedirects();
+});
+
+setInterval(updateRedirects, 1 * 60 * 60 * 1000);

extensions/chrome/content.js

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+function stripRedirect(URL, redirectRegex) {
+  for (var i = 0; i < redirectRegex.length; i++) {
+    var rule = redirectRegex[i];
+    var result = new RegExp(rule.pattern).exec(URL);
+    if (result) {
+      var newURL = result.groups.baseUrl;
+      try {
+        return decodeURIComponent(newURL);
+      } catch (e) {
+        console.log(e);
+        return URL;
+      }
+    }
+  }
+  return URL;
+}
+
+function stripRedirects() {
+  var Links = document.querySelectorAll("a.postlink, a.autolinker_link");
+
+  chrome.storage.local.get("rfd-redirects", function (redirectRegex) {
+    Links.forEach(function (Link) {
+      var ReferralURL = Link.href;
+
+      Link.href = stripRedirect(ReferralURL, redirectRegex["rfd-redirects"]);
+    });
+  });
+}
+
+stripRedirects();

extensions/chrome/manifest.json

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+{
+  "manifest_version": 3,
+  "name": "rfd-redirect-stripper",
+  "description": "Strip tracking redirects on rfd",
+  "version": "0.1",
+  "content_scripts": [
+    {
+      "matches": ["*://forums.redflagdeals.com/*"],
+      "js": ["content.js"],
+      "run_at": "document_end"
+    }
+  ],
+  "action": {
+    "default_icon": "icon.png"
+  },
+  "background": {
+    "service_worker": "background.js"
+  },
+  "permissions": ["scripting", "storage"],
+  "host_permissions": ["*://forums.redflagdeals.com/*"]
+}