Add error queue store

Allows errors to be queued for showing to the user, such as in the
uploader’s error states.

js/actions/error_queue_actions.js

@@ -0,0 +1,13 @@
+'use strict';
+
+import { alt } from '../alt';
+
+class ErrorQueueActions {
+    constructor() {
+        this.generateActions(
+            'shiftErrorQueue'
+        );
+    }
+}
+
+export default alt.createActions(ErrorQueueActions);

js/constants/error_constants.js

@@ -111,6 +111,17 @@ const ErrorClasses = {
                                           'are working to resolve them. Please try again in a few hours.'),
             'test': 'Problem signing the chunk'
         },
+
+        // Fallback error tips
+        'slowConnection': {
+            'prettifiedText': getLangText('Are you on a slow or unstable network? Uploading large files requires a fast Internet connection.')
+        },
+        'tryDifferentBrowser': {
+            'prettifiedText': getLangText("We still can't seem to upload your file. Maybe try another browser?")
+        },
+        'contactUs': {
+            'prettifiedText': getLangText("We're having a really hard time with your upload. Please contact us for more help.")
+        }
     },
     'default': {
         'default': {
@@ -120,10 +131,12 @@ const ErrorClasses = {
 };
 
 // Dynamically inject the name and group properties into the classes
-Object.keys(ErrorClasses).forEach((errorGroup) => {
-    Object.keys(ErrorClasses[errorGroup]).forEach((errorClass) => {
-        errorClass.name = errorClass;
-        errorClass.group = errorGroup;
+Object.keys(ErrorClasses).forEach((errorGroupKey) => {
+    const errorGroup = ErrorClasses[errorGroupKey];
+    Object.keys(errorGroup).forEach((errorClassKey) => {
+        const errorClass = errorGroup[errorClassKey];
+        errorClass.name = errorClassKey;
+        errorClass.group = errorGroupKey;
     });
 });
 

js/stores/error_queue_store.js

@@ -0,0 +1,52 @@
+'use strict';
+
+import { alt } from '../alt';
+
+import ErrorQueueActions from '../actions/error_queue_actions.js';
+
+import { ErrorClasses } from '../constants/error_constants.js';
+
+class ErrorQueueStore {
+    constructor() {
+        const { upload: { slowConnection, tryDifferentBrowser } } = ErrorClasses;
+
+        this.errorQueue = {
+            'upload': {
+                queue: [slowConnection, tryDifferentBrowser],
+                loop: true
+            }
+        };
+
+        // Add intial index to each error queue
+        Object
+            .keys(this.errorQueue)
+            .forEach((type) => {
+                this.errorQueue[type].index = 0;
+            });
+
+        this.exportPublicMethods({
+            getNextError: this.getNextError
+        });
+    }
+
+    getNextError(type) {
+        const errorQueue = this.errorQueues[type];
+        const { queue, index } = errorQueue;
+
+        ErrorQueueActions.shiftErrorQueue(type);
+        return queue[index];
+    }
+
+    onShiftQueue(type) {
+        const errorQueue = this.errorQueues[type];
+        const { queue, loop } = errorQueue;
+
+        ++errorQueue.index;
+        if (loop) {
+            // Loop back to the beginning if all errors have been exhausted
+            errorQueue.index %= queue.length;
+        }
+    }
+}
+
+export default alt.createStore(ErrorQueueStore, 'ErrorQueueStore');