From a69798f5253d1a3042863a2277fe767f8d6414e9 Mon Sep 17 00:00:00 2001
From: Yumi Izumi <me@yumiizumi.com>
Date: Sun, 8 Nov 2020 23:50:55 +0900
Subject: [PATCH] Update background.js

---
 background.js | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/background.js b/background.js
index 1e23622..6489526 100644
--- a/background.js
+++ b/background.js
@@ -129,12 +129,25 @@ const layers = {
   traffic: "S", // not implemented on OSM, default to standard.
   bicycling: "C",
 };
+const notPrivateSearchEngine = [
+  "google.com",
+  "google.co.jp",
+  "www.google.com",
+  "www.google.co.jp",
+];
+const privateSearchEngine = [
+  { link: "https://duckduckgo.com", q: "/" },
+  { link: "https://startpage.com", q: "/search/" },
+  { link: "https://www.qwant.com", q: "/" },
+  { link: "https://www.mojeek.com", q: "/search" },
+];
 
 let disableNitter;
 let disableInvidious;
 let disableBibliogram;
 let disableOsm;
 let disableOldReddit;
+let disableSearchEngine;
 let nitterInstance;
 let invidiousInstance;
 let bibliogramInstance;
@@ -172,6 +185,7 @@ browser.storage.sync.get(
     "disableBibliogram",
     "disableOsm",
     "disableOldReddit",
+    "disableSearchEngine",
     "alwaysProxy",
     "onlyEmbeddedVideo",
     "videoQuality",
@@ -192,6 +206,7 @@ browser.storage.sync.get(
     disableBibliogram = result.disableBibliogram;
     disableOsm = result.disableOsm;
     disableOldReddit = result.disableOldReddit;
+    disableSearchEngine = result.disableSearchEngine;
     nitterInstance = result.nitterInstance;
     invidiousInstance = result.invidiousInstance;
     bibliogramInstance = result.bibliogramInstance;
@@ -254,6 +269,9 @@ browser.storage.onChanged.addListener((changes) => {
   if ("disableOldReddit" in changes) {
     disableOldReddit = changes.disableOldReddit.newValue;
   }
+  if ("disableSearchEngine" in changes) {
+    disableSearchEngine = changes.disableSearchEngine.newValue;
+  }
   if ("alwaysProxy" in changes) {
     alwaysProxy = changes.alwaysProxy.newValue;
   }
@@ -569,6 +587,28 @@ function redirectReddit(url, initiator, type) {
   return `${oldRedditView}${url.pathname}${url.search}`;
 }
 
+function redirectSearchEngine(url, initiator) {
+  if (disableSearchEngine || isException(url, initiator)) {
+    return null;
+  }
+  if (url.pathname.includes("/home")) {
+    return null;
+  }
+  if (url.pathname.includes("search")) {
+    searchEngine =
+      searchEngineInstance || getRandomInstance(privateSearchEngine);
+    search = "";
+    url.search
+      .slice(1)
+      .split("&")
+      .forEach(function (input) {
+        if (input.startsWith("q=")) search = input;
+      });
+    console.log("search: ", search);
+    return `${searchEngine.link}${searchEngine.q}?${search}`;
+  }
+}
+
 browser.webRequest.onBeforeRequest.addListener(
   (details) => {
     const url = new URL(details.url);
@@ -602,6 +642,10 @@ browser.webRequest.onBeforeRequest.addListener(
       redirect = {
         redirectUrl: redirectReddit(url, initiator, details.type),
       };
+    } else if (notPrivateSearchEngine.includes(url.host)) {
+      redirect = {
+        redirectUrl: redirectSearchEngine(url, initiator),
+      };
     }
     if (redirect && redirect.redirectUrl) {
       console.info(