[TASK] Initial commit: basic firebase setup and part 1 almost solved (of-by-one)

functions/.eslintrc.js

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+module.exports = {
+  root: true,
+  env: {
+    es6: true,
+    node: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript",
+    "google",
+    "plugin:@typescript-eslint/recommended",
+  ],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: ["tsconfig.json", "tsconfig.dev.json"],
+    sourceType: "module",
+  },
+  ignorePatterns: [
+    "/lib/**/*", // Ignore built files.
+  ],
+  plugins: [
+    "@typescript-eslint",
+    "import",
+  ],
+  rules: {
+    "quotes": ["error", "double"],
+    "import/no-unresolved": 0,
+  },
+};

functions/.gitignore

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+# Compiled JavaScript files
+lib/**/*.js
+lib/**/*.js.map
+
+# TypeScript v1 declaration files
+typings/
+
+# Node.js dependency directory
+node_modules/

functions/package.json

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+{
+  "name": "functions",
+  "scripts": {
+    "lint": "eslint --ext .js,.ts .",
+    "build": "tsc",
+    "serve": "npm run build && firebase emulators:start --only functions",
+    "shell": "npm run build && firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "16"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^9.8.0",
+    "firebase-functions": "^3.14.1"
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^3.9.1",
+    "@typescript-eslint/parser": "^3.8.0",
+    "eslint": "^7.6.0",
+    "eslint-config-google": "^0.14.0",
+    "eslint-plugin-import": "^2.22.0",
+    "firebase-functions-test": "^0.2.0",
+    "typescript": "^3.8.0"
+  },
+  "private": true
+}

functions/src/day1.ts

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+
+class Day1 {
+  static part1(input: string[]): number {
+
+    let res = 0;
+    for (let i = 1; i < input.length; i++) {
+      if (input[i] > input[i-1]) res++;
+    }
+    return res;
+  }
+}
+
+export default Day1;

functions/src/index.ts

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+import * as functions from "firebase-functions";
+import Utils from "./utils";
+import Day1 from "./day1";
+import {Response} from "firebase-functions";
+
+
+// // Start writing Firebase Functions
+// // https://firebase.google.com/docs/functions/typescript
+//
+// export const helloWorld = functions.https.onRequest((request, response) => {
+//   functions.logger.info("Hello logs!", {structuredData: true});
+//   response.send("Hello from Firebase!");
+// });
+
+interface DayResult {
+  part1: any;
+  part2: any;
+}
+
+export const day = {
+  1: functions.region('europe-west1').https.onRequest((request, response) => {
+
+    const input = Utils.parseInput(request);
+    const part1 = Day1.part1(input);
+
+    sendResponse(response, part1, 0);
+
+  }),
+}
+
+function sendResponse(response: Response, part1: any, part2: any) {
+
+  const res: DayResult = { part1, part2 };
+  response.send(res);
+}

functions/src/utils.ts

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+import {Request} from "firebase-functions/lib/common/providers/https";
+
+class Utils {
+  static parseInput(request: Request): string[] {
+
+    const body = request.body;
+    if (typeof body === 'string') {
+      return body.split('\n');
+    } else if (body.constructor === Array) {
+      return body;
+    } else {
+      throw Error("Invalid request");
+    }
+
+
+  }
+}
+
+export default Utils;

functions/tsconfig.dev.json

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+{
+  "include": [
+    ".eslintrc.js"
+  ]
+}

functions/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "outDir": "lib",
+    "sourceMap": true,
+    "strict": true,
+    "target": "es2017"
+  },
+  "compileOnSave": true,
+  "include": [
+    "src"
+  ]
+}