1 files changed, 61 insertions, 0 deletions
diff --git a/copylib/taler-presence.js b/copylib/taler-presence.js
new file mode 100644
index 00000000..2562238b
--- /dev/null
+++ b/copylib/taler-presence.js
@@ -0,0 +1,61 @@
+/* @licstart  The following is the entire license notice for the
+  JavaScript code in this page.
+
+  Copyright (C) 2016 GNUnet e.V.
+
+  The JavaScript code in this page is free software: you can
+  redistribute it and/or modify it under the terms of the GNU
+  Lesser General Public License (GNU LGPL) as published by the Free Software
+  Foundation, either version 2.1 of the License, or (at your option)
+  any later version.  The code is distributed WITHOUT ANY WARRANTY;
+  without even the implied warranty of MERCHANTABILITY or FITNESS
+  FOR A PARTICULAR PURPOSE.  See the GNU LGPL for more details.
+
+  As additional permission under GNU LGPL version 2.1 section 7, you
+  may distribute non-source (e.g., minimized or compacted) forms of
+  that code without the copy of the GNU LGPL normally required by
+  section 4, provided you include this license notice and a URL
+  through which recipients can access the Corresponding Source.
+
+  @licend  The above is the entire license notice
+  for the JavaScript code in this page.
+*/
+
+function handleInstall() {
+  var show = document.getElementsByClassName("taler-installed-show");
+  var hide = document.getElementsByClassName("taler-installed-hide");
+  for (var i = 0; i < show.length; i++) {
+    show[i].style.display = "";
+  }
+  for (var i = 0; i < hide.length; i++) {
+    hide[i].style.display = "none";
+  }
+};
+
+function handleUninstall() {
+  var show = document.getElementsByClassName("taler-installed-show");
+  var hide = document.getElementsByClassName("taler-installed-hide");
+  for (var i = 0; i < show.length; i++) {
+    show[i].style.display = "none";
+  }
+  for (var i = 0; i < hide.length; i++) {
+    hide[i].style.display = "";
+  }
+};
+
+function probeTaler() {
+  var eve = new Event("taler-probe");
+  console.log("probing taler");
+  document.dispatchEvent(eve);
+}
+
+document.addEventListener("taler-wallet-present", handleInstall, false);
+document.addEventListener("taler-unload", handleUninstall, false);
+document.addEventListener("taler-load", handleInstall, false);
+
+function initTaler() {
+  handleUninstall();
+  probeTaler();
+}
+
+window.addEventListener("load", initTaler, false);