Add redirect from Medium to Scribe

Multiple Medium domains would be redirected to two known Scribe
instances:

scribe.rip
scribe.nixnet.services

src/assets/javascripts/helpers/medium.js

@@ -0,0 +1,26 @@
+const targets = [
+  "medium.com",
+  /.*.medium.com/,
+  /* Other domains of medium blogs, source(s):
+   * https://findingtom.com/best-medium-blogs-to-follow/#1-forge
+   * */
+  "towardsdatascience.com",
+  "uxdesign.cc",
+  "uxplanet.org",
+  "betterprogramming.pub",
+  "aninjusticemag.com",
+  "betterhumans.pub",
+  "psiloveyou.xyz",
+  "entrepreneurshandbook.co",
+  "blog.coinbase.com"
+];
+
+const redirects = [
+  "https://scribe.rip",
+  "https://scribe.nixnet.services/"
+];
+
+export default {
+  targets,
+  redirects,
+};

src/pages/background/background.js

@@ -5,6 +5,7 @@ import twitterHelper from "../../assets/javascripts/helpers/twitter.js";
 import youtubeHelper from "../../assets/javascripts/helpers/youtube.js";
 import instagramHelper from "../../assets/javascripts/helpers/instagram.js";
 import mapsHelper from "../../assets/javascripts/helpers/google-maps.js";
+import mediumHelper from "../../assets/javascripts/helpers/medium.js";
 import redditHelper from "../../assets/javascripts/helpers/reddit.js";
 import searchHelper from "../../assets/javascripts/helpers/google-search.js";
 import googleTranslateHelper from "../../assets/javascripts/helpers/google-translate.js";
@@ -13,6 +14,9 @@ import wikipediaHelper from "../../assets/javascripts/helpers/wikipedia.js";
 const nitterInstances = twitterHelper.redirects;
 const twitterDomains = twitterHelper.targets;
 const youtubeDomains = youtubeHelper.targets;
+const mediumDomains = mediumHelper.targets;
+const scribeInstances = mediumHelper.redirects;
+const scribeDefault = mediumHelper.redirects[0];
 const invidiousInstances = youtubeHelper.redirects;
 const instagramDomains = instagramHelper.targets;
 const bibliogramInstances = instagramHelper.redirects;
@@ -43,6 +47,7 @@ let disableInvidious;
 let disableBibliogram;
 let disableOsm;
 let disableReddit;
+let disableScribe;
 let disableSearchEngine;
 let disableSimplyTranslate;
 let disableWikipedia;
@@ -50,6 +55,7 @@ let nitterInstance;
 let invidiousInstance;
 let bibliogramInstance;
 let osmInstance;
+let scribeInstance;
 let redditInstance;
 let searchEngineInstance;
 let simplyTranslateInstance;
@@ -77,6 +83,7 @@ browser.storage.sync.get(
     "bibliogramInstance",
     "osmInstance",
     "redditInstance",
+    "scribeInstance",
     "searchEngineInstance",
     "simplyTranslateInstance",
     "wikipediaInstance",
@@ -85,6 +92,7 @@ browser.storage.sync.get(
     "disableBibliogram",
     "disableOsm",
     "disableReddit",
+    "disableScribe",
     "disableSearchEngine",
     "disableSimplyTranslate",
     "disableWikipedia",
@@ -108,6 +116,7 @@ browser.storage.sync.get(
     bibliogramInstance = result.bibliogramInstance;
     osmInstance = result.osmInstance || osmDefault;
     redditInstance = result.redditInstance || redditDefault;
+    scribeInstance = result.scribeInstance || scribeDefault;
     searchEngineInstance = result.searchEngineInstance;
     simplyTranslateInstance =
       result.simplyTranslateInstance || simplyTranslateDefault;
@@ -169,6 +178,9 @@ browser.storage.onChanged.addListener((changes) => {
   if ("redditInstance" in changes) {
     redditInstance = changes.redditInstance.newValue || redditDefault;
   }
+  if ("scribeInstance" in changes) {
+    scribeInstance = changes.scribeInstance.newValue || scribeDefault;
+  }
   if ("searchEngineInstance" in changes) {
     searchEngineInstance = changes.searchEngineInstance.newValue;
   }
@@ -515,6 +527,53 @@ function redirectReddit(url, initiator, type) {
   return `${redditInstance}${url.pathname}${url.search}`;
 }
 
+function redirectScribe(url, initiator, type) {
+  if (disableScribe || isException(url, initiator)) {
+    return null;
+  }
+  // Do not redirect when already on the selected view
+  if (
+    (initiator && initiator.origin === scribeInstance) ||
+    url.origin === scribeInstance
+  ) {
+    return null;
+  }
+  // Do not redirect exclusions nor anything other than main_frame
+  if (type !== "main_frame") {
+    return null;
+  }
+  if (url.host === "i.redd.it") {
+    if (scribeInstance.includes("libredd")) {
+      return `${scribeInstance}/img${url.pathname}${url.search}`;
+    } else if (scribeInstance.includes("teddit")) {
+      // As of 2021-04-09, redirects for teddit images are nontrivial:
+      // - navigating to the image before ever navigating to its page causes
+      //   404 error (probably needs fix on teddit project)
+      // - some image links on teddit are very different
+      // Therefore, don't support redirecting image links for teddit.
+      return null;
+    } else {
+      return null;
+    }
+  } else if (url.host === "redd.it") {
+    if (
+      scribeInstance.includes("teddit") &&
+      !url.pathname.match(/^\/+[^\/]+\/+[^\/]/)
+    ) {
+      // As of 2021-04-22, redirects for teddit redd.it/foo links don't work.
+      // It appears that adding "/comments" as a prefix works, so manually add
+      // that prefix if it is missing.  Even though redd.it/comments/foo links
+      // don't seem to work or exist, guard against affecting those kinds of
+      // paths.
+      //
+      // Note the difference between redd.it/comments/foo (doesn't work) and
+      // teddit.net/comments/foo (works).
+      return `${scribeInstance}/comments${url.pathname}${url.search}`;
+    }
+  }
+  return `${scribeInstance}${url.pathname}${url.search}`;
+}
+
 function redirectSearchEngine(url, initiator) {
   if (disableSearchEngine || isException(url, initiator)) {
     return null;
@@ -607,6 +666,10 @@ browser.webRequest.onBeforeRequest.addListener(
       redirect = {
         redirectUrl: redirectReddit(url, initiator, details.type),
       };
+    } else if (mediumDomains.includes(url.host)) {
+      redirect = {
+        redirectUrl: redirectScribe(url, initiator, details.type),
+      };
     } else if (url.href.match(googleSearchRegex)) {
       redirect = {
         redirectUrl: redirectSearchEngine(url, initiator),

src/pages/options/options.html

@@ -141,6 +141,28 @@
             </tr>
           </tbody>
         </table>
+      </section>
+      <section class="settings-block">
+        <table class="option" aria-label="Toggle Scribe redirects">
+          <tbody>
+            <tr>
+              <td>
+                <h1 data-localise="__MSG_disableScribe__">
+                  Scribe Redirects
+                </h1>
+              </td>
+              <td>
+                <input
+                  aria-hidden="true"
+                  id="disable-scribe"
+                  type="checkbox"
+                  checked
+                />&nbsp;
+                <label for="disable-scribe" class="checkbox-label"> </label>
+              </td>
+            </tr>
+          </tbody>
+        </table>
       </section>
        <section class="settings-block">
         <table class="option" aria-label="Toggle Search Engine redirects">
@@ -256,6 +278,16 @@
           />
         </div>
       </section>
+      <section class="settings-block">
+        <h1 data-localise="__MSG_scribeInstance__">Scribe Instance</h1>
+        <div class="autocomplete">
+          <input
+            id="scribe-instance"
+            type="url"
+            placeholder="https://libredd.it"
+          />
+        </div>
+      </section>
       <section class="settings-block">
         <h1 data-localise="__MSG_searchEngineInstance__">Search Engine Instance</h1>
         <div class="autocomplete">

src/pages/options/options.js

@@ -6,6 +6,7 @@ import youtubeHelper from "../../assets/javascripts/helpers/youtube.js";
 import instagramHelper from "../../assets/javascripts/helpers/instagram.js";
 import mapsHelper from "../../assets/javascripts/helpers/google-maps.js";
 import redditHelper from "../../assets/javascripts/helpers/reddit.js";
+import mediumHelper from "../../assets/javascripts/helpers/medium.js";
 import searchHelper from "../../assets/javascripts/helpers/google-search.js";
 import googleTranslateHelper from "../../assets/javascripts/helpers/google-translate.js";
 import wikipediaHelper from "../../assets/javascripts/helpers/wikipedia.js";
@@ -15,6 +16,7 @@ const invidiousInstances = youtubeHelper.redirects;
 const bibliogramInstances = instagramHelper.redirects;
 const osmInstances = mapsHelper.redirects;
 const redditInstances = redditHelper.redirects;
+const scribeInstances = mediumHelper.redirects;
 const searchEngineInstances = searchHelper.redirects;
 const simplyTranslateInstances = googleTranslateHelper.redirects;
 const wikipediaInstances = wikipediaHelper.redirects;
@@ -24,6 +26,7 @@ const autocompletes = [
   { id: "bibliogram-instance", instances: bibliogramInstances },
   { id: "osm-instance", instances: osmInstances },
   { id: "reddit-instance", instances: redditInstances },
+  { id: "scribe-instance", instances: scribeInstances },
   {
     id: "search-engine-instance",
     instances: searchEngineInstances.map((instance) => instance.link),
@@ -38,6 +41,7 @@ let invidiousInstance = document.getElementById("invidious-instance");
 let bibliogramInstance = document.getElementById("bibliogram-instance");
 let osmInstance = document.getElementById("osm-instance");
 let redditInstance = document.getElementById("reddit-instance");
+let scribeInstance = document.getElementById("scribe-instance");
 let searchEngineInstance = document.getElementById("search-engine-instance");
 let simplyTranslateInstance = document.getElementById(
   "simply-translate-instance"
@@ -48,6 +52,7 @@ let disableInvidious = document.getElementById("disable-invidious");
 let disableBibliogram = document.getElementById("disable-bibliogram");
 let disableOsm = document.getElementById("disable-osm");
 let disableReddit = document.getElementById("disable-reddit");
+let disableScribe = document.getElementById("disable-scribe");
 let disableSearchEngine = document.getElementById("disable-search-engine");
 let disableSimplyTranslate = document.getElementById(
   "disable-simply-translate"
@@ -103,6 +108,7 @@ browser.storage.sync.get(
     "bibliogramInstance",
     "osmInstance",
     "redditInstance",
+    "scribeInstance",
     "searchEngineInstance",
     "simplyTranslateInstance",
     "wikipediaInstance",
@@ -111,6 +117,7 @@ browser.storage.sync.get(
     "disableBibliogram",
     "disableOsm",
     "disableReddit",
+    "disableScribe",
     "disableSearchEngine",
     "disableSimplyTranslate",
     "disableWikipedia",
@@ -139,6 +146,7 @@ browser.storage.sync.get(
     bibliogramInstance.value = result.bibliogramInstance || "";
     osmInstance.value = result.osmInstance || "";
     redditInstance.value = result.redditInstance || "";
+    scribeInstance.value = result.scribeInstance || "";
     searchEngineInstance.value =
       (result.searchEngineInstance && result.searchEngineInstance.link) || "";
     simplyTranslateInstance.value = result.simplyTranslateInstance || "";
@@ -148,6 +156,7 @@ browser.storage.sync.get(
     disableBibliogram.checked = !result.disableBibliogram;
     disableOsm.checked = !result.disableOsm;
     disableReddit.checked = !result.disableReddit;
+    disableScribe.checked = !result.disableScribe;
     disableSearchEngine.checked = !result.disableSearchEngine;
     disableSimplyTranslate.checked = !result.disableSimplyTranslate;
     disableWikipedia.checked = !result.disableWikipedia;
@@ -311,6 +320,15 @@ const redditInstanceChange = debounce(() => {
 }, 500);
 redditInstance.addEventListener("input", redditInstanceChange);
 
+const scribeInstanceChange = debounce(() => {
+  if (scribeInstance.checkValidity()) {
+    browser.storage.sync.set({
+      scribeInstance: parseURL(scribeInstance.value),
+    });
+  }
+}, 500);
+scribeInstance.addEventListener("input", scribeInstanceChange);
+
 const searchEngineInstanceChange = debounce(() => {
   const instance = searchEngineInstances.find(
     (instance) => instance.link === searchEngineInstance.value
@@ -369,6 +387,10 @@ disableReddit.addEventListener("change", (event) => {
   browser.storage.sync.set({ disableReddit: !event.target.checked });
 });
 
+disableScribe.addEventListener("change", (event) => {
+  browser.storage.sync.set({ disableScribe: !event.target.checked });
+});
+
 disableSearchEngine.addEventListener("change", (event) => {
   browser.storage.sync.set({ disableSearchEngine: !event.target.checked });
 });