Add donations stats to the API

Related to Issue #42

plugins/vuex-persist.client.ts

@@ -3,6 +3,7 @@
 import { Plugin } from '@nuxt/types';
 import { VuexPersistence } from 'vuex-persist';
 
+import { DonationState } from '~/types/api/donation';
 import { IncentiveState } from '~/types/api/incentive';
 import { MarathonState } from '~/types/api/marathon';
 import { PatreonState } from '~/types/api/patreon';
@@ -12,7 +13,7 @@ import { UserState } from '~/types/api/user';
 interface State {
   api: {
     category: { }; // CategoryState;
-    donation: { }; // DonationState;
+    donation: DonationState;
     incentive: IncentiveState;
     marathon: MarathonState;
     patreon: PatreonState;
@@ -46,7 +47,17 @@ const vuexPersistPlugin: Plugin = ({ $localForage, store }) => {
         api: {
           ...store.state.api,
           category: store.state.api.category,
-          donation: store.state.api.donation,
+          donation: {
+            ...store.state.api.donation,
+            donations: {
+              ...state.api.donation.donations,
+              ...store.state.api.donation.donations,
+            },
+            stats: {
+              ...state.api.donation.stats,
+              ...store.state.api.donation.stats,
+            },
+          },
           incentive: {
             ...store.state.api.incentive,
             incentives: {

store/api/donation.ts

@@ -1,24 +1,26 @@
 import Vue from 'vue';
 import { ActionTree, MutationTree } from 'vuex';
 import { OengusAPI } from '~/plugins/oengus';
-import { Donation, DonationState } from '~/types/api/donation';
+import { Donation, DonationState, DonationStats } from '~/types/api/donation';
 import { OengusPagination } from '~/types/api/oengus-api';
 
 const DonationOengusAPI = new OengusAPI<DonationState>('marathons');
 
 export const state = (): DonationState => ({
   donations: { },
+  stats: { },
 });
 
 export const mutations: MutationTree<DonationState> = {
   addDonations(state, { id, value: donations, data }): void {
     Vue.set(state.donations, `${id}-${data.page}-${data.size}`, donations);
   },
+  addStats(state, { id, value: stats }): void {
+    Vue.set(state.stats, id, stats);
+  },
 };
 
 export const actions: ActionTree<DonationState, DonationState> = {
-  get: DonationOengusAPI.get<OengusPagination<Donation>>({
-    path: 'donations',
-    key: 'donations',
-  }),
+  get: DonationOengusAPI.get<OengusPagination<Donation>>({ path: 'donations', key: 'donations' }),
+  stats: DonationOengusAPI.get<DonationStats>({ path: 'donations/stats', key: 'stats' }),
 };

types/api/donation.d.ts

@@ -10,8 +10,16 @@ export interface Donation {
   answers: Array<string>;
 }
 
+export interface DonationStats {
+  average: number;
+  count: number;
+  max: number;
+  total: number;
+}
+
 export interface DonationState extends OengusState {
   donations: { [id: string]: OengusPagination<Donation> };
+  stats: { [id: string]: DonationStats };
 }
 
 export interface DonationPageParams {