fix invalid push devices

website/server/models/pushDevice.js

@@ -1,4 +1,5 @@
 import mongoose from 'mongoose';
+import _ from 'lodash';
 import baseModel from '../libs/baseModel';
 
 const { Schema } = mongoose;
@@ -19,4 +20,30 @@ schema.plugin(baseModel, {
   _id: false,
 });
 
+/**
+ * Remove invalid data from an array of push devices.
+ * Fix for https://github.com/HabitRPG/habitica/issues/11805
+ * and https://github.com/HabitRPG/habitica/issues/11868
+ * Called by user's post init hook (models/user/hooks.js)
+ */
+schema.statics.cleanupCorruptData = function cleanupCorruptPushDevicesData (pushDevices) {
+  if (!pushDevices) return pushDevices;
+
+  let filteredPushDevices = pushDevices.filter(pushDevice => {
+    // Exclude push devices with a nullish value, no id or no type
+    if (!pushDevice || !pushDevice.regId || !pushDevice.type) return false;
+    return true;
+  });
+
+  // Remove duplicate push devices
+  // can be caused by a race condition when adding a new push device
+  filteredPushDevices = _.uniqWith(filteredPushDevices, (val, otherVal) => {
+    if (val.regId === otherVal.regId && val.type === otherVal.type) return true;
+    return false;
+  });
+
+  return filteredPushDevices;
+};
+
+
 export const model = mongoose.model('PushDevice', schema);