fetch item prices - throttle end points with promise queue

app/stores/app.store.ts

@@ -1,7 +1,7 @@
 import Store from 'electron-store';
+import * as _ from 'lodash';
 import { action, computed, observable } from 'mobx';
-import { setHeader } from '../http';
-import { ILeague } from '../model';
+import { IItemPrice, ILeague } from '../model';
 import { IItem } from '../model/item';
 import { IStashTab } from '../model/stash-tab';
 import { PoeService } from '../services';
@@ -14,7 +14,7 @@ export class AppStore {
   @observable
   public sessionID?: string;
   @observable
-  public activeLeague: ILeague;
+  public activeLeague?: ILeague;
   @observable
   public selectedTabIndex: number = 0;
   @observable
@@ -46,7 +46,7 @@ export class AppStore {
   @action
   private async loadLeagues() {
     try {
-      const leagues = await PoeService.getLeagues();
+      const leagues = await PoeService.getLeagues(this.sessionCookieHeader);
       if (!leagues) {
         return;
       }
@@ -67,19 +67,29 @@ export class AppStore {
 
   @action
   public resetState() {
-    delete this.username;
-    delete this.sessionID;
-    setHeader('Cookie', '');
+    this.username = undefined;
+    this.sessionID = undefined;
+    this.activeLeague = undefined;
+    this.selectedTabIndex = 0;
+    this.stashTabs = [];
+    this.stashItems = [];
+    this.leagues = [];
     store.clear();
   }
 
   @action
   public setSessionID(sessionID: string) {
-    setHeader('Cookie', `POESESSID=${sessionID}`);
     this.sessionID = sessionID;
     StorageService.storeSessionID(sessionID);
   }
 
+  @computed
+  public get sessionCookieHeader(): { Cookie: string } {
+    return {
+      Cookie: `POESESSID=${this.sessionID}`,
+    };
+  }
+
   @action
   public setUsername(username: string) {
     this.username = username;
@@ -101,14 +111,27 @@ export class AppStore {
   @action
   public async performLogin(sessionID: string) {
     this.setSessionID(sessionID);
-    const username = await PoeService.getUsername();
+    const username = await PoeService.getUsername(this.sessionCookieHeader);
     this.setUsername(username);
+    this.loadLeagues();
   }
 
   @action
   public async loadItems(tabIndex: number | string) {
-    const data = await PoeService.getStash(this.username!, this.activeLeague.id, tabIndex);
+    PoeService.clearRequestQueue();
+    const data = await PoeService.getStash(this.username!, this.activeLeague!.id, tabIndex);
     this.stashTabs = data.tabs;
     this.stashItems = data.items;
   }
+
+  /**
+   * Updates the price of an item in the list - updates based on id
+   */
+  @action
+  public updateItemPrice(id: string, itemPrice: IItemPrice) {
+    const item = _.find(this.stashItems, i => i.id === id);
+    if (item) {
+      item.itemPrice = itemPrice;
+    }
+  }
 }