Added toasts redux for alerts

• Added:
- toasts redux for alerts

app/javascript/gabsocial/reducers/index.js

@@ -39,6 +39,7 @@ import status_revisions from './status_revisions'
 import suggestions from './suggestions'
 import tenor from './tenor'
 import timelines from './timelines'
+import toasts from './toasts'
 import user from './user'
 import user_lists from './user_lists'
 
@@ -83,6 +84,7 @@ const reducers = {
   suggestions,
   tenor,
   timelines,
+  toasts,
   user,
   user_lists,
 }

app/javascript/gabsocial/reducers/toasts.js

@@ -0,0 +1,25 @@
+import {
+  TOAST_SHOW,
+  TOAST_DISMISS,
+  TOAST_CLEAR,
+} from '../actions/toasts'
+import { Map as ImmutableMap, List as ImmutableList } from 'immutable'
+
+const initialState = ImmutableList([])
+
+export default function toasts(state = initialState, action) {
+  switch(action.type) {
+  case TOAST_SHOW:
+    return state.push(ImmutableMap({
+      key: state.size > 0 ? state.last().get('key') + 1 : 0,
+      message: action.message,
+      type: action.toastType,
+    }))
+  case TOAST_DISMISS:
+    return state.filterNot(item => item.get('key') === action.toast.key)
+  case TOAST_CLEAR:
+    return state.clear()
+  default:
+    return state
+  }
+}