Optimize campaign store use

static/src/app/services/logs/campaign.service.ts

@@ -24,13 +24,14 @@ export class CampaignService {
   }
 
   getAllCampaignsWithWars() {
-    this.http.get(this.config.apiWarPath)
+    return this.http.get(this.config.apiWarPath)
         .map(res => res.json())
-        .do((ranks) => {
-          this.campaignStore.dispatch({type: LOAD, data: ranks});
-        }).subscribe(_ => {
-    });
-    return this.campaigns$;
+        .do((ranks) => this.campaignStore.dispatch({type: LOAD, data: ranks}))
+  }
+
+  getCampaign(id: string) {
+    return this.http.get(this.config.apiCampaignPath + '/' + id)
+               .map(res => res.json());
   }
 
   submitCampaign(campaign: Campaign) {
@@ -63,13 +64,6 @@ export class CampaignService {
 
   deleteCampaign(campaign: Campaign) {
     return this.http.delete(this.config.apiCampaignPath + '/' + campaign._id)
-               .do(res => {
-                 this.campaignStore.dispatch({type: REMOVE, data: campaign});
-               });
-  }
-
-  getCampaign(id: string) {
-    return this.http.get(this.config.apiCampaignPath + '/' + id)
-               .map(res => res.json());
+               .do(res => this.campaignStore.dispatch({type: REMOVE, data: campaign}));
   }
 }

static/src/app/statistic/stats.component.ts

@@ -12,7 +12,7 @@ import {SettingsService} from '../services/settings.service';
 })
 export class StatisticComponent implements OnInit {
 
-  selectedCampaign: Campaign;
+  selectedCampaign: Campaign = {};
 
   campaigns: Campaign[] = [];
 
@@ -27,7 +27,7 @@ export class StatisticComponent implements OnInit {
   }
 
   ngOnInit() {
-    this.campaignService.getAllCampaignsWithWars().subscribe((campaigns) => {
+    this.campaignService.getAllCampaignsWithWars().filter(c => c.length !== 0).subscribe((campaigns) => {
       this.campaigns = campaigns;
       this.selectedCampaign = this.resolveCampaignFromUrl();
       this.switchCampaign(this.selectedCampaign);
@@ -35,10 +35,6 @@ export class StatisticComponent implements OnInit {
   }
 
   resolveCampaignFromUrl() {
-    if (this.campaigns.length === 0) {
-      return {};
-    }
-
     const url = this.router.url;
 
     const idFetchPattern = /right:.*\/(.*)\)$/;