Exception Notifier Extension

src/jupyter_contrib_nbextensions/nbextensions/exception_notifier/README.md

@@ -0,0 +1,32 @@
+# Exception Notifier
+
+While working on our code in Jupyter Notebook we tend to forget after a while that we working, actually running some code, but there was an exception that interrupted the long running task. :angry::cry: 
+
+COMEON!!!!!! NOT FARE
+
+We again run it and have to wait and watch for another iteration to check if the fix worked or did it not.
+
+Such a pain. :worried:
+
+Why don't we think about a exception notifier. Wait, What?! Don't we already have a notifier? Ahh yes we do, but not an exception notifier.
+
+Well we can use them in each the cells and all that, but that's a mess in the notebook.
+
+We can have an extension, in the notebook where if there was an exception we will be notified like a normal notifier does.
+
+## Installation:
+
+```
+pip install jupyter
+```
+
+```
+pip install jupyter_contrib_nbextensions && jupyter contrib nbextensions install
+```
+
+Start up a Jupyter Notebook and navigate to the new Nbextensions tab:
+
+![Exception Notifier Screenshot](exception_notifier_screenshot.png)
+
+Enable the extension 'Exception Notifier' enjoy the productivity benefits.
+(If you don’t see a tab, open a notebook and click Edit > nbextensions config)

src/jupyter_contrib_nbextensions/nbextensions/exception_notifier/exception_notifier.js

@@ -0,0 +1,90 @@
+define([
+  'require',
+  'jquery',
+  'moment',
+  'base/js/namespace',
+  'base/js/events',
+  'notebook/js/codecell',
+  'notebook/js/outputarea',
+  'services/config',
+  ], function (
+    requirejs,
+    $,
+    moment,
+    Jupyter,
+    events,
+    outputarea,
+    codecell) {
+
+    "use strict";
+
+    var CodeCell = codecell.CodeCell;
+
+    var params = {
+      sticky: true,
+      play_sound: true
+    };
+    var audio_file = "./notify.mp3";
+
+    var current_time = function() {
+      return new Date().getTime() / 1000;
+    };
+
+    var play_notification_sound = function(opts) {
+      try {
+        var audio = new Audio(requirejs.toUrl(audio_file));
+        audio.play();
+      } catch(e) {
+        console.log('HTML5 Audio not supported in browser.');
+      }
+    };
+
+    var notify = function () {
+        var opts = {
+          body: "Exception",
+          icon: Jupyter.notebook.base_url + "static/base/images/favicon.ico",
+          requireInteraction: params.sticky
+        };
+        if (params.play_sound) {
+          play_notification_sound(opts);
+        }
+    };
+
+    function showNotification(evalue) {
+      notify();
+      const notification = new Notification("Exception Occurred", {
+        body: evalue,
+        icon: "https://www.iconfinder.com/data/icons/miscellaneous-67-mix/168/objection_convulsions_exception_slander_exclusion_denigration_mudslinging-512.png"
+     });
+    }
+    function checkPermission() {
+      if (Notification.permission === "granted") {
+      events.on('execute.CodeCell', function(evt, data) {
+        var outputs = data.cell.output_area.outputs;
+        setTimeout(function() { 
+          if ("traceback" in outputs[0]) {
+              showNotification(data.cell.output_area.outputs[0].evalue);
+          }
+        }, 1000);
+      });
+     } else if (Notification.permission !== "denied") {
+        Notification.requestPermission().then(permission => {
+          if (permission === "granted") {
+            showNotification();
+          }
+           console.log(permission);
+        });
+     }
+    }
+    var load_ipython_extension = function () {
+      return Jupyter.notebook.config.loaded.then(function() {
+        $.extend(true, params, Jupyter.notebook.config.data.notify);
+        checkPermission();
+      });
+    };
+
+    return {
+      load_ipython_extension : load_ipython_extension
+    };
+
+  });

src/jupyter_contrib_nbextensions/nbextensions/exception_notifier/exception_notifier.yaml

@@ -0,0 +1,16 @@
+Type: IPython Notebook Extension
+Compatibility: 3.x, 4.x, 5.x, 6.x
+Name: Exception Notifier
+Main: exception_notifier.js
+Link: README.md
+Description: >
+  While running all cells or each cell in the notebook, if an exception occurs, you will get a notification
+Parameters:
+- name: notify.sticky
+  description: Require interactions on notifications to dismiss them
+  input_type: checkbox
+  default: true
+- name: notify.play_sound
+  description: Play notification sound
+  input_type: checkbox
+  default: true