feat: One off campaign UI (#2621)

app/javascript/shared/mixins/campaignMixin.js

@@ -0,0 +1,19 @@
+import { CAMPAIGN_TYPES } from '../constants/campaign';
+import inboxMixin from './inboxMixin';
+export default {
+  mixins: [inboxMixin],
+  computed: {
+    campaignType() {
+      if (this.isAWebWidgetInbox) {
+        return CAMPAIGN_TYPES.ONGOING;
+      }
+      return CAMPAIGN_TYPES.ONE_OFF;
+    },
+    isOngoingType() {
+      return this.campaignType === CAMPAIGN_TYPES.ONGOING;
+    },
+    isOnOffType() {
+      return this.campaignType === CAMPAIGN_TYPES.ONE_OFF;
+    },
+  },
+};