1 files changed, 179 insertions, 0 deletions
diff --git a/js/background.js b/js/background.js
new file mode 100644
index 0000000..754e178
--- /dev/null
+++ b/js/background.js
@@ -0,0 +1,179 @@
+/* Handle showing of new item count and polling the TT-RSS server. */
+
+var last_updated = 0;
+var feeds_last_updated = 0;
+var prefs_last_updated = 0;
+
+function param_escape(arg) {
+  if (typeof encodeURIComponent != 'undefined')
+    return encodeURIComponent(arg);
+  else
+    return escape(arg);
+}
+
+function update_feeds() {
+  console.log('feeds update');
+
+  var requestUrl = localStorage['site_url'] +
+    '/public.php?op=globalUpdateFeeds';
+
+  var xhr = new XMLHttpRequest();
+
+  xhr.open('POST', requestUrl, true);
+  xhr.send();
+
+  var d = new Date();
+  localStorage['last_feeds_updated'] = d.getTime();
+}
+
+function update() {
+  console.log('update');
+
+  var d = new Date();
+  var login = localStorage['login'];
+  var single_user = localStorage['single_user'];
+
+  if (single_user == '1') login = 'admin';
+
+  var requestUrl = localStorage['site_url'] + '/public.php';
+  var params = 'op=getUnread&fresh=1&login=' + param_escape(login);
+
+  var xhr = new XMLHttpRequest();
+
+  xhr.open('POST', requestUrl, true);
+  xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+  xhr.send(params);
+
+  xhr.onreadystatechange = function() {
+    if (xhr.readyState == 4) {
+      var icon = new Object();
+      var title = new Object();
+      var badge = new Object();
+      var badge_color = new Object();
+
+      // init stuff
+      icon.path = 'images/normal.png';
+      title.title = '';
+      badge.text = '';
+      badge_color.color = [0, 0, 0, 0];
+
+      var show_badge = localStorage['show_badge'] == '1';
+      var show_fresh = localStorage['show_fresh'] == '1';
+
+      if (xhr.status == 200) {
+        var response = xhr.responseText.split(';');
+
+        var unread = parseInt(response[0]);
+
+        if (isNaN(unread)) unread = 0;
+
+        var fresh;
+
+        if (response.length == 2)
+          fresh = parseInt(response[1]);
+        else
+          fresh = 0;
+
+        if (isNaN(fresh)) fresh = 0;
+
+        if (unread > 0) {
+          icon.path = 'images/alert.png';
+          title.title = 'You have %s unread articles.'.replace('%s', unread);
+
+          if (show_fresh && fresh > 0) {
+            badge.text = fresh + '';
+            badge_color.color = [0, 200, 0, 255];
+          } else {
+            badge.text = unread + '';
+            badge_color.color = [255, 0, 0, 255];
+          }
+        } else if (unread == -1) {
+          icon.path = 'images/error.png';
+
+          var errorMsg = xhr.responseText.split(';')[1];
+
+          title.title = 'Error: %s.'.replace('%s', errorMsg.trim());
+        } else {
+          title.title = 'You have no unread articles.';
+        }
+
+        localStorage['last_updated'] = d.getTime();
+        localStorage['last_error'] = '';
+      } else {
+        localStorage['last_error'] = xhr.responseText;
+
+        icon.path = 'images/error.png';
+        title.title = 'Error (%s) while updating.'.replace('%s', xhr.status);
+      }
+
+      if (!show_badge) badge.text = '';
+
+      chrome.browserAction.setBadgeBackgroundColor(badge_color);
+      chrome.browserAction.setBadgeText(badge);
+      chrome.browserAction.setTitle(title);
+      chrome.browserAction.setIcon(icon);
+    }
+  };
+}
+
+function timeout() {
+  var update_interval;
+  var prefs_updated;
+  var feeds_update_interval = 30 * 60 * 1000;
+
+  if (localStorage['update_interval'])
+    update_interval = localStorage['update_interval'] * 60 * 1000;
+  else
+    update_interval = 15 * 60 * 1000;
+
+  if (localStorage['prefs_updated'])
+    prefs_updated = localStorage['prefs_updated'];
+  else
+    prefs_updated = -1;
+
+  var d = new Date();
+
+  if (d.getTime() > last_updated + update_interval ||
+      prefs_updated != prefs_last_updated) {
+    last_updated = d.getTime();
+    try {
+      update();
+    } catch (e) {
+      console.warn(e);
+    }
+  }
+
+  if (localStorage['update_feeds'] == 1 &&
+      (d.getTime() > feeds_last_updated + feeds_update_interval ||
+       prefs_updated != prefs_last_updated)) {
+    feeds_last_updated = d.getTime();
+
+    try {
+      update_feeds();
+    } catch (e) {
+      console.warn(e);
+    }
+  }
+
+  prefs_last_updated = prefs_updated;
+}
+
+function init() {
+  chrome.browserAction.onClicked.addListener(function() {
+    var site_url = localStorage['site_url'];
+
+    if (site_url) {
+      chrome.tabs.create({url: site_url});
+    }
+  });
+
+  // TODO: Create smarter algorithm that sets `periodInMinutes` to
+  // `feeds_update_interval` and updates the `alarm` object when extension
+  // preferences are saved.
+  timeout();
+  chrome.alarms.create({periodInMinutes: 1});
+  chrome.alarms.onAlarm.addListener(function() {timeout();});
+}
+
+init();
+