Added stats response

ref #56

src/models/responses/ResponseStats.ts

@@ -0,0 +1,74 @@
+import {
+    IsInt
+} from "class-validator";
+import { Donation } from '../entities/Donation';
+import { Runner } from '../entities/Runner';
+import { RunnerOrganisation } from '../entities/RunnerOrganisation';
+import { RunnerTeam } from '../entities/RunnerTeam';
+import { Scan } from '../entities/Scan';
+import { User } from '../entities/User';
+
+/**
+ * Defines the stats response.
+ * The stats response calculates some basic stats for a dashboard or public display.
+*/
+export class ResponseStats {
+    /**
+     * The amount of runners registered in the system.
+     */
+    @IsInt()
+    total_runners: number;
+
+    /**
+     * The amount of teams registered in the system.
+     */
+    @IsInt()
+    total_teams: number;
+
+    /**
+     * The amount of organisations registered in the system.
+     */
+    @IsInt()
+    total_orgs: number;
+
+    /**
+     * The amount of users registered in the system.
+     */
+    @IsInt()
+    total_users: number;
+
+    /**
+     * The amount of valid scans registered in the system.
+     */
+    @IsInt()
+    total_scans: number;
+
+    /**
+     * The total distance that all runners ran.
+     */
+    @IsInt()
+    total_distance: number;
+
+    /**
+     * The total donation amount.
+     */
+    @IsInt()
+    total_donation: number;
+
+    /**
+     * The average distance per runner.
+     */
+    @IsInt()
+    average_distance: number;
+
+    public constructor(runners: Runner[], teams: RunnerTeam[], orgs: RunnerOrganisation[], users: User[], scans: Scan[], donations: Donation[]) {
+        this.total_runners = runners.length;
+        this.total_teams = teams.length;
+        this.total_orgs = orgs.length;
+        this.total_users = users.length;
+        this.total_scans = scans.filter(scan => { scan.valid === true }).length;
+        this.total_distance = runners.reduce((sum, current) => sum + current.distance, 0);
+        this.total_donation = donations.reduce((sum, current) => sum + current.amount, 0);
+        this.average_distance = this.total_distance / this.total_runners;
+    }
+}