WIP: Fetch list from URL

background.js

@@ -1,5 +1,47 @@
+var DEFAULT_LIST_URL = 'https://cdn.jsdelivr.net/gh/nileshtrivedi/better/defaultlist.json'
+var BETTER_ALTERNATIVES = [];
+
 chrome.runtime.onInstalled.addListener(function() {
-    // chrome.storage.sync.set({color: '#3aa757'}, function() {
+  console.log('onInstalled....');
-    //   console.log("The color is green.");
+});
-    // });
+
+// fetch and save data when chrome restarted, alarm will continue running when chrome is restarted
+chrome.runtime.onStartup.addListener(() => {
+  console.log('onStartup....');
+  onStartup();
+});
+
+
+function onStartup(){
+    chrome.storage.sync.get(['betterSourceURL'], function(result) {
+        console.log('Value currently is ' + (result.betterSourceURL || DEFAULT_LIST_URL));
+
+        fetch((result.betterSourceURL || DEFAULT_LIST_URL))
+        .then(response => response.json())
+        .then(data => {
+            console.log("Got data: ", data);
+            BETTER_ALTERNATIVES = data;
+            chrome.storage.local.set({betterSourceData: data}, function() {
+              console.log('Set betterSource = ' + data);
+            })
+        });
+    });
+}
+
+function getMatch(url){
+  var match = BETTER_ALTERNATIVES.find(pattern => url.match(new Regexp(pattern[0])));
+  if(match)
+      return match[1];
+  else return null;
+}
+
+chrome.runtime.onMessage.addListener((msg, sender, response) => {
+  switch (msg.type) {
+      case 'getMatch':
+          response(getMatch(msg.url));
+          break;
+      default:
+          response('unknown request');
+          break;
+  }
 });

contentscript.js

@@ -1,25 +1,18 @@
 // document.body.style.border = "15px solid red";
 
 /* 
+
+IN PROGRESS: 
+
+- List of alternatives should be loaded from a user-specified external source. Can be modified via options.html/options.js
+
 TODO
  - Pop-up should be formatted to look better.
  - Pop-up should be dismissable (per URL / per domain).
  - Once dismissed, popup should not be shown on the same url/domain. Use cookies or localStorage for this.
- - List of alternatives should be loaded from a user-specified external source. Can be modified via options.html/options.js
  - Since we're replacing innerHTML, we should protect against XSS attacks.
 */
 
-BETTER_ALTERNATIVES = [
-  [ /https?:\/\/(www.)?google.com\/chrome/ , "A better alternative is <a href='https://mozilla.com' target='_blank'>Mozilla</a>."]
-]
-
-function findBetter(url) {
-    var match = BETTER_ALTERNATIVES.find(pattern => url.match(pattern[0]));
-    if(match)
-        return match[1];
-    else return null;
-}
-
 function showBetter(alternative) {
     if(!alternative) return;
     let betterdiv = document.createElement("div");
@@ -37,3 +30,9 @@ function showBetter(alternative) {
 }
 
 showBetter(findBetter(document.location.href));
+
+chrome.runtime.sendMessage({type: 'getMatch', url: document.location.href}, (response) => {
+    if (response) {
+        showBetter(response);
+    }
+});

defaultlist.json

@@ -0,0 +1,3 @@
+[
+    [ "https?:\/\/(www.)?google.com\/chrome" , "A better alternative is <a href='https://mozilla.com' target='_blank'>Mozilla</a>."]
+]

options.js

@@ -2,7 +2,7 @@ let input = document.getElementById('betterSourceText');
 let submit = document.getElementById('betterSourceSubmit');
 
 submit.addEventListener('click', function() {
-    chrome.storage.sync.set({betterSource: input.value}, function() {
+    chrome.storage.sync.set({betterSourceURL: input.value}, function() {
     console.log('Set betterSource = ' + input.value);
     })
 });