[TASK] Solved Day 2 Part 1

functions/src/day2.ts

@@ -0,0 +1,31 @@
+import Utils from "./utils";
+
+class Day2 {
+  static part1(input: string[]): number {
+
+    const forwardMoves = input.filter(s => s.startsWith("forward"))
+      .map(s => this.readUnits(s));
+    const finalForwardPosition = Utils.sum(forwardMoves);
+
+    const depthMovesUp = input.filter(s => s.startsWith("up"))
+      .map(s => this.readUnits(s));
+    const depthMovesDown = input.filter(s => s.startsWith("down"))
+      .map(s => this.readUnits(s));
+    const finalDepthPosition = Utils.sum(depthMovesDown) - Utils.sum(depthMovesUp);
+
+    return finalForwardPosition * finalDepthPosition;
+  }
+
+  static part2(input: string[]): number {
+
+    
+    // TODO implement
+    return 0;
+  }
+
+  private static readUnits(input: string): number {
+    return parseInt(input.substr(input.indexOf(' ') + 1));
+  }
+}
+
+export default Day2;

functions/src/index.ts

@@ -2,6 +2,7 @@ import * as functions from "firebase-functions";
 import Utils from "./utils";
 import Day1 from "./day1";
 import {Response} from "firebase-functions";
+import Day2 from "./day2";
 
 
 // // Start writing Firebase Functions
@@ -23,7 +24,14 @@ export const day = {
     const input = Utils.parseInput(request);
     const part1 = Day1.part1(input);
     const part2 = Day1.part2(input);
+    sendResponse(response, part1, part2);
 
+  }),
+  2: functions.region("europe-west1").https.onRequest((request, response) => {
+
+    const input = Utils.parseInput(request);
+    const part1 = Day2.part1(input);
+    const part2 = Day2.part2(input);
     sendResponse(response, part1, part2);
 
   }),

functions/src/utils.ts

@@ -12,6 +12,10 @@ class Utils {
       throw Error("Invalid request");
     }
   }
+
+  static sum(values: number[]): number {
+    return values.reduce((a, b) => a + b, 0);
+  }
 }
 
 export default Utils;

input/day/2-example.http

@@ -0,0 +1,11 @@
+POST http://localhost:5001/advent-of-code-2021-911a8/europe-west1/day-2
+Content-Type: text/plain
+
+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2
+
+###