From 9bb838afbb3fe9c13810777c8811dacedd19e093 Mon Sep 17 00:00:00 2001
From: Clemens Wolff <clewolff@microsoft.com>
Date: Wed, 17 May 2017 12:40:21 -0700
Subject: [PATCH 1/2] Show toast on data source error

Fixes #83
---
 src/data-sources/plugins/DataSourcePlugin.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/data-sources/plugins/DataSourcePlugin.ts b/src/data-sources/plugins/DataSourcePlugin.ts
index c6d15f8f..a29bf248 100644
--- a/src/data-sources/plugins/DataSourcePlugin.ts
+++ b/src/data-sources/plugins/DataSourcePlugin.ts
@@ -1,4 +1,6 @@
 
+import { ToastActions } from '../../components/Toast';
+
 export interface IDataSourceOptions {
   dependencies: (string | Object)[];
   /** This would be variable storing the results */
@@ -116,6 +118,21 @@ export abstract class DataSourcePlugin<T> implements IDataSourcePlugin {
   }
 
   failure(error: any): void { 
+    ToastActions.addToast({ text: this.errorToMessage(error) });
     return error;
   }
+
+  private errorToMessage(error: any): string {
+    const exception = error as Error;
+    if (exception == null) {
+      return error;
+    }
+
+    const message = exception.message;
+    if (message === '[object ProgressEvent]') {
+      return 'There is a problem connecting to the internet.';
+    }
+
+    return `Error: ${message}`;
+  }
 }
\ No newline at end of file

From 5961bc7d5aed813b4f2b3ecfae3de0fe797e8adf Mon Sep 17 00:00:00 2001
From: Clemens Wolff <clewolff@microsoft.com>
Date: Thu, 18 May 2017 08:54:14 -0700
Subject: [PATCH 2/2] Fix incorrect use of as operator

---
 src/data-sources/plugins/DataSourcePlugin.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/data-sources/plugins/DataSourcePlugin.ts b/src/data-sources/plugins/DataSourcePlugin.ts
index a29bf248..1eb2fec1 100644
--- a/src/data-sources/plugins/DataSourcePlugin.ts
+++ b/src/data-sources/plugins/DataSourcePlugin.ts
@@ -123,12 +123,11 @@ export abstract class DataSourcePlugin<T> implements IDataSourcePlugin {
   }
 
   private errorToMessage(error: any): string {
-    const exception = error as Error;
-    if (exception == null) {
+    if (!(error instanceof Error)) {
       return error;
     }
 
-    const message = exception.message;
+    const message = (error as Error).message;
     if (message === '[object ProgressEvent]') {
       return 'There is a problem connecting to the internet.';
     }