chore: check in firebase function used for populating caretaker app

scripts/caretaking/firebase-functions/.gitignore

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+## Compiled JavaScript files
+**/*.js
+**/*.js.map
+
+node_modules/
+
+firebase-debug.log
+ui-debug.log

scripts/caretaking/firebase-functions/firebase.json

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+{
+  "functions": {
+    "source": "./",
+    "predeploy": "npm --prefix \"$RESOURCE_DIR\" run build"
+  }
+}

scripts/caretaking/firebase-functions/package.json

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+{
+  "name": "caretaker-firebase-functions",
+  "scripts": {
+    "build": "tsc",
+    "serve": "yarn build && firebase emulators:start --only functions --project test-jperrott",
+    "deploy": "yarn build && firebase deploy --only functions --project test-jperrott"
+  },
+  "engines": {
+    "node": "12"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^9.0.0",
+    "firebase-functions": "^3.8.0"
+  },
+  "devDependencies": {
+    "typescript": "^3.9.7",
+    "firebase-tools": "^8.6.0"
+  },
+  "private": true
+}

scripts/caretaking/firebase-functions/src/github-pr.ts

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+import * as functions from 'firebase-functions';
+import * as admin from 'firebase-admin';
+
+export const githubPR = functions.https.onRequest(async (req, resp) => {
+  const github = req.body;
+  const action = req.get('X-GitHub-Event');
+  const fullRepoName = github.repository.full_name.replace(/[\.\#\$\[\]]/g, '');
+  let actionTaken = 'None';
+  let prEffected = 'Unknown';
+  if (action === 'pull_request') {
+    const pullsRef = admin.database().ref(`/pulls/${fullRepoName}/${github.number}/github`);
+    const pull_request = github.pull_request;
+    pullsRef.update({
+      'branch': pull_request.base.ref,
+      'title': pull_request.title,
+      'pull_number': pull_request.number,
+      'state': pull_request.state,
+      'commit_sha': pull_request.head.sha,
+      'author': pull_request.user,
+      'labels': pull_request.labels,
+      'created_at': pull_request.created_at,
+      'updated_at': pull_request.updated_at,
+    });
+    prEffected = pull_request.number;
+    actionTaken = 'Updated PR';
+  } else if (action === 'status') {
+    const ref = admin
+        .database()
+        .ref(`/pulls/${fullRepoName}`)
+        .orderByChild('github/commit_sha')
+        .equalTo(github.sha);
+    await ref.once('value', snapshot => {
+      snapshot.forEach(d => {
+        d.child(`statuses`).ref.update({
+          [github.context.replace(/\W/g, '')]: {
+            context: github.context,
+            build_url: github.target_url,
+            status: github.state
+          }
+        });
+        prEffected = d.val().github.pull_number;
+        actionTaken = 'Updated Status';
+      });
+    });
+  }
+
+  const logAndOutputString = `Repo: ${fullRepoName} | PR: ${prEffected} | Action: ${actionTaken}`;
+  console.log(logAndOutputString);
+  resp.send(logAndOutputString);
+});

scripts/caretaking/firebase-functions/src/index.ts

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+import * as functions from 'firebase-functions';
+import * as admin from 'firebase-admin';
+
+admin.initializeApp(functions.config().firebase);
+
+export {githubPR} from './github-pr';

scripts/caretaking/firebase-functions/tsconfig.json

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