feat : adding alarms API (lingua-libre#97)

* chore:added alarms permission

* feat : added alarm functionality

* refactor: Initialize UI with respect to alarms API

* style:better readabiity

* style : better readabiity

* revert : keeping the old approach for Firefox

* revert : keeping the old approach for Firefox

* chore : removed log messages

manifest.json

@@ -17,7 +17,7 @@
     "storage",
     "webRequest",
     "webRequestBlocking",
-    "offscreen"
+    "alarms"
   ],
   "content_scripts": [
     {

popup/popup.js

@@ -382,15 +382,21 @@ var browser = (browserType === 'firefox') ? browser : (browserType === 'chrome')
 		ui = new UI();
 		ui.switchPanel( 'loaded' );
 	}
-
-	let state = _backgroundPage.state;
-	function waitWhileLoading() {
-		if (state === 'ready' ) {
-			ui = new UI();
-		} else {
-			setTimeout( waitWhileLoading, 100 );
-		}
-	}
-	waitWhileLoading()
-
+	if (browserType === "chrome") {
+    chrome.runtime.onMessage.addListener((message, sender) => {
+      if (message.state === "ready") {
+        ui = new UI();
+      }
+    });
+  } else {
+    let state = _backgroundPage.state;
+    function waitWhileLoading() {
+      if (state === "ready") {
+        ui = new UI();
+      } else {
+        setTimeout(waitWhileLoading, 100);
+      }
+    }
+    waitWhileLoading();
+  }
 })();

sw.js

@@ -769,11 +769,26 @@ async function setState(value) {
 // Run it
 main();
 
+const WAIT_ALARM = 'waitWhileLoading';
+async function createAlarm() {
+  await chrome.alarms.create(WAIT_ALARM, {
+    periodInMinutes: 1 / 60 // by specifying it as fraction we can run the ⏰ in every 1 second
+  });
+}
+
 chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
 	if (message.command === "getBackground") {
-    // persisted the state inside chrome.storage.local but will get to that later
-    console.log(state);
     const extensionData = {state,params,uiLanguages,records,signLanguages};
     sendResponse(extensionData);
+    createAlarm();
 	}
-});
+});
+
+chrome.alarms.onAlarm.addListener((alarm)=>{
+  if (alarm.name === WAIT_ALARM) {
+    if (state === 'ready') {
+      chrome.runtime.sendMessage({state:'ready'});
+        chrome.alarms.clear(WAIT_ALARM);
+    }
+  }
+})