Added stats and stats responses for orgs

ref #56

src/models/entities/RunnerOrganisation.ts

@@ -1,6 +1,7 @@
-import { IsOptional } from "class-validator";
+import { IsInt, IsOptional } from "class-validator";
 import { ChildEntity, ManyToOne, OneToMany } from "typeorm";
 import { Address } from "./Address";
+import { Runner } from './Runner';
 import { RunnerGroup } from "./RunnerGroup";
 import { RunnerTeam } from "./RunnerTeam";
 
@@ -24,4 +25,32 @@ export class RunnerOrganisation extends RunnerGroup {
    */
   @OneToMany(() => RunnerTeam, team => team.parentGroup, { nullable: true })
   teams: RunnerTeam[];
+
+  /**
+   * Returns all runners associated with this organisation (directly or indirectly via teams).
+   */
+  public get allRunners(): Runner[] {
+    let returnRunners: Runner[] = new Array<Runner>();
+    returnRunners.push(...this.runners);
+    for (let team of this.teams) {
+      returnRunners.push(...team.runners)
+    }
+    return returnRunners;
+  }
+
+  /**
+   * Returns the total distance ran by this group's runners based on all their valid scans.
+  */
+  @IsInt()
+  public get distance(): number {
+    return this.allRunners.reduce((sum, current) => sum + current.distance, 0);
+  }
+
+  /**
+   * Returns the total donations a runner has collected based on his linked donations and distance ran.
+  */
+  @IsInt()
+  public get distanceDonationAmount(): number {
+    return this.allRunners.reduce((sum, current) => sum + current.distanceDonationAmount, 0);
+  }
 }